./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/reducercommutativity/sep10-2.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 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:03:54,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:03:54,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:03:54,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:03:54,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:03:54,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:03:54,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:03:54,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:03:54,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:03:54,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:03:54,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:03:54,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:03:54,752 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:03:54,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:03:54,755 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:03:54,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:03:54,758 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:03:54,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:03:54,761 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:03:54,766 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:03:54,768 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:03:54,769 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:03:54,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:03:54,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:03:54,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:03:54,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:03:54,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:03:54,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:03:54,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:03:54,780 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:03:54,781 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:03:54,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:03:54,782 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:03:54,783 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:03:54,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:03:54,785 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:03:54,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:03:54,786 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:03:54,786 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:03:54,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:03:54,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:03:54,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:03:54,790 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:03:54,820 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:03:54,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:03:54,821 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:03:54,821 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:03:54,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:03:54,822 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:03:54,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:03:54,823 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:03:54,823 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:03:54,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:03:54,824 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:03:54,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:03:54,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:03:54,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:03:54,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:03:54,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:03:54,825 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:03:54,826 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:03:54,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:03:54,826 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:03:54,826 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:03:54,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:03:54,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:03:54,827 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:03:54,827 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:03:54,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:03:54,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:03:54,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:03:54,828 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:03:54,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:03:54,828 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:03:54,828 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:03:54,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:03:54,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 [2022-07-13 10:03:55,054 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:03:55,073 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:03:55,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:03:55,075 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:03:55,077 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:03:55,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep10-2.i [2022-07-13 10:03:55,137 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44399489f/52cbc327d828488c86a010266745db5f/FLAGd383c05d6 [2022-07-13 10:03:55,487 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:03:55,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i [2022-07-13 10:03:55,492 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44399489f/52cbc327d828488c86a010266745db5f/FLAGd383c05d6 [2022-07-13 10:03:55,915 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44399489f/52cbc327d828488c86a010266745db5f [2022-07-13 10:03:55,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:03:55,919 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:03:55,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:03:55,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:03:55,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:03:55,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:03:55" (1/1) ... [2022-07-13 10:03:55,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61afb5a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:55, skipping insertion in model container [2022-07-13 10:03:55,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:03:55" (1/1) ... [2022-07-13 10:03:55,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:03:55,948 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:03:56,097 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/reducercommutativity/sep10-2.i[1293,1306] [2022-07-13 10:03:56,099 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:03:56,105 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:03:56,121 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/reducercommutativity/sep10-2.i[1293,1306] [2022-07-13 10:03:56,122 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:03:56,132 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:03:56,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56 WrapperNode [2022-07-13 10:03:56,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:03:56,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:03:56,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:03:56,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:03:56,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,158 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-13 10:03:56,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:03:56,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:03:56,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:03:56,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:03:56,165 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,165 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,167 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,175 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:03:56,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:03:56,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:03:56,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:03:56,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (1/1) ... [2022-07-13 10:03:56,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:03:56,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:56,212 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) [2022-07-13 10:03:56,239 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 [2022-07-13 10:03:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:03:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:03:56,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:03:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:03:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:03:56,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:03:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:03:56,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:03:56,256 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2022-07-13 10:03:56,256 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2022-07-13 10:03:56,311 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:03:56,312 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:03:56,449 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:03:56,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:03:56,454 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 10:03:56,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:03:56 BoogieIcfgContainer [2022-07-13 10:03:56,456 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:03:56,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:03:56,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:03:56,473 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:03:56,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:03:55" (1/3) ... [2022-07-13 10:03:56,474 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24661b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:03:56, skipping insertion in model container [2022-07-13 10:03:56,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:03:56" (2/3) ... [2022-07-13 10:03:56,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24661b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:03:56, skipping insertion in model container [2022-07-13 10:03:56,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:03:56" (3/3) ... [2022-07-13 10:03:56,481 INFO L111 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2022-07-13 10:03:56,496 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:03:56,497 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:03:56,545 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:03:56,551 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@257cb642, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4cddebd [2022-07-13 10:03:56,551 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:03:56,554 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:56,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-13 10:03:56,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:56,562 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:56,562 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:56,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:56,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2022-07-13 10:03:56,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:56,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685704647] [2022-07-13 10:03:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-13 10:03:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-13 10:03:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:03:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:03:56,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685704647] [2022-07-13 10:03:56,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685704647] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:03:56,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:03:56,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 10:03:56,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534273693] [2022-07-13 10:03:56,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:03:56,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:03:56,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:56,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:03:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:03:56,773 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:03:56,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:56,797 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2022-07-13 10:03:56,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:03:56,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-13 10:03:56,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:56,805 INFO L225 Difference]: With dead ends: 52 [2022-07-13 10:03:56,806 INFO L226 Difference]: Without dead ends: 25 [2022-07-13 10:03:56,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 10:03:56,811 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 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 [2022-07-13 10:03:56,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-13 10:03:56,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-13 10:03:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-13 10:03:56,842 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-07-13 10:03:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:56,842 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-13 10:03:56,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:03:56,843 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-13 10:03:56,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-13 10:03:56,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:56,845 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:56,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:03:56,845 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:56,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2022-07-13 10:03:56,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:56,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959842493] [2022-07-13 10:03:56,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:56,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:56,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:03:56,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-13 10:03:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-13 10:03:56,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:03:56,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:56,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959842493] [2022-07-13 10:03:56,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959842493] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:56,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487138449] [2022-07-13 10:03:56,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:56,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:56,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:56,972 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) [2022-07-13 10:03:56,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:03:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:03:57,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:03:57,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:03:57,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487138449] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:03:57,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:03:57,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-13 10:03:57,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067144422] [2022-07-13 10:03:57,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:03:57,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:03:57,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:57,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:03:57,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:03:57,101 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:57,112 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-13 10:03:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:03:57,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-13 10:03:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:57,113 INFO L225 Difference]: With dead ends: 45 [2022-07-13 10:03:57,113 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 10:03:57,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:03:57,115 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 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 [2022-07-13 10:03:57,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 10:03:57,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-13 10:03:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:57,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-13 10:03:57,121 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2022-07-13 10:03:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:57,121 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-13 10:03:57,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:57,122 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-13 10:03:57,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:03:57,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:57,124 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:57,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 10:03:57,335 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 [2022-07-13 10:03:57,336 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2022-07-13 10:03:57,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:57,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308165043] [2022-07-13 10:03:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:57,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:03:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 10:03:57,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:03:57,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,441 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 10:03:57,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:57,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308165043] [2022-07-13 10:03:57,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308165043] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:57,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26035781] [2022-07-13 10:03:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:57,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:57,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:57,444 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) [2022-07-13 10:03:57,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:03:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-13 10:03:57,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:57,527 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-13 10:03:57,528 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-13 10:03:57,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26035781] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:03:57,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-13 10:03:57,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-13 10:03:57,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192095734] [2022-07-13 10:03:57,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:03:57,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 10:03:57,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:57,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 10:03:57,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:03:57,542 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:57,557 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2022-07-13 10:03:57,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 10:03:57,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2022-07-13 10:03:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:57,561 INFO L225 Difference]: With dead ends: 41 [2022-07-13 10:03:57,561 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 10:03:57,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-13 10:03:57,564 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:57,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:57,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 10:03:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-07-13 10:03:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-07-13 10:03:57,576 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2022-07-13 10:03:57,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:57,579 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-07-13 10:03:57,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-13 10:03:57,579 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-07-13 10:03:57,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 10:03:57,581 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:57,581 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:57,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 10:03:57,795 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 [2022-07-13 10:03:57,796 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:57,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:57,796 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2022-07-13 10:03:57,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:57,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290684162] [2022-07-13 10:03:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:57,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-13 10:03:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-13 10:03:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-13 10:03:57,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,921 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-13 10:03:57,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:57,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290684162] [2022-07-13 10:03:57,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290684162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:57,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867258831] [2022-07-13 10:03:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:57,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:57,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:57,931 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) [2022-07-13 10:03:57,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:03:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:57,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 10:03:57,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:03:58,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:58,055 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-13 10:03:58,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867258831] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:58,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:58,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-13 10:03:58,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338889828] [2022-07-13 10:03:58,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:58,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 10:03:58,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:58,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 10:03:58,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:03:58,058 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:03:58,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:58,094 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-07-13 10:03:58,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 10:03:58,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2022-07-13 10:03:58,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:58,095 INFO L225 Difference]: With dead ends: 58 [2022-07-13 10:03:58,095 INFO L226 Difference]: Without dead ends: 37 [2022-07-13 10:03:58,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:03:58,096 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:58,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:58,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-13 10:03:58,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2022-07-13 10:03:58,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:58,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2022-07-13 10:03:58,102 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2022-07-13 10:03:58,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:58,102 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2022-07-13 10:03:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-13 10:03:58,103 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2022-07-13 10:03:58,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-13 10:03:58,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:58,104 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:58,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:58,336 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 [2022-07-13 10:03:58,336 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:58,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:58,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2022-07-13 10:03:58,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:58,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598568263] [2022-07-13 10:03:58,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:58,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:58,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-13 10:03:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:58,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-07-13 10:03:58,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:58,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-13 10:03:58,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-13 10:03:58,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:58,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598568263] [2022-07-13 10:03:58,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598568263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:58,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217450585] [2022-07-13 10:03:58,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:03:58,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:58,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:58,484 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) [2022-07-13 10:03:58,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:03:58,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:03:58,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:03:58,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:03:58,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:58,637 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 10:03:58,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:58,709 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-13 10:03:58,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217450585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:58,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:58,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-13 10:03:58,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381198469] [2022-07-13 10:03:58,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:58,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:03:58,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:58,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:03:58,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:03:58,720 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:03:58,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:58,767 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2022-07-13 10:03:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:03:58,768 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2022-07-13 10:03:58,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:58,769 INFO L225 Difference]: With dead ends: 74 [2022-07-13 10:03:58,769 INFO L226 Difference]: Without dead ends: 50 [2022-07-13 10:03:58,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:03:58,771 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:58,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-13 10:03:58,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-07-13 10:03:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:58,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-13 10:03:58,787 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2022-07-13 10:03:58,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:58,787 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-13 10:03:58,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:03:58,788 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-13 10:03:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-13 10:03:58,791 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:58,792 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:58,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:59,001 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 [2022-07-13 10:03:59,001 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:59,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:59,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2022-07-13 10:03:59,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:59,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167564418] [2022-07-13 10:03:59,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:59,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:59,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:03:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:59,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:03:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:59,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-13 10:03:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-13 10:03:59,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167564418] [2022-07-13 10:03:59,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167564418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160840734] [2022-07-13 10:03:59,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:03:59,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:59,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:59,119 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) [2022-07-13 10:03:59,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:03:59,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 10:03:59,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:03:59,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:03:59,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:59,223 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-13 10:03:59,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:59,262 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-13 10:03:59,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160840734] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:59,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:59,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-13 10:03:59,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273424841] [2022-07-13 10:03:59,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:59,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 10:03:59,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:59,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 10:03:59,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-13 10:03:59,265 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:03:59,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:59,285 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2022-07-13 10:03:59,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 10:03:59,286 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2022-07-13 10:03:59,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:59,287 INFO L225 Difference]: With dead ends: 86 [2022-07-13 10:03:59,287 INFO L226 Difference]: Without dead ends: 61 [2022-07-13 10:03:59,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-13 10:03:59,288 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:59,288 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:59,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-13 10:03:59,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-13 10:03:59,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-07-13 10:03:59,307 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 70 [2022-07-13 10:03:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:59,308 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-07-13 10:03:59,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:03:59,308 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-07-13 10:03:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-13 10:03:59,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:59,310 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:03:59,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:03:59,523 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 [2022-07-13 10:03:59,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:03:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:03:59,524 INFO L85 PathProgramCache]: Analyzing trace with hash -189786485, now seen corresponding path program 4 times [2022-07-13 10:03:59,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:03:59,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129910186] [2022-07-13 10:03:59,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:03:59,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:03:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:59,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:03:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:59,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-07-13 10:03:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:59,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 10:03:59,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:03:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-13 10:03:59,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:03:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129910186] [2022-07-13 10:03:59,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129910186] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:03:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794560014] [2022-07-13 10:03:59,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:03:59,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:03:59,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:03:59,703 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) [2022-07-13 10:03:59,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:03:59,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:03:59,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:03:59,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:03:59,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:03:59,855 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-07-13 10:03:59,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:03:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2022-07-13 10:03:59,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794560014] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:03:59,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:03:59,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-07-13 10:03:59,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331933381] [2022-07-13 10:03:59,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:03:59,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 10:03:59,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:03:59,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 10:03:59,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:03:59,930 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:03:59,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:03:59,963 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2022-07-13 10:03:59,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 10:03:59,964 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 106 [2022-07-13 10:03:59,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:03:59,965 INFO L225 Difference]: With dead ends: 110 [2022-07-13 10:03:59,965 INFO L226 Difference]: Without dead ends: 73 [2022-07-13 10:03:59,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:03:59,966 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:03:59,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:03:59,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-13 10:03:59,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-07-13 10:03:59,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:03:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-07-13 10:03:59,981 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 106 [2022-07-13 10:03:59,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:03:59,981 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-07-13 10:03:59,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-13 10:03:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-07-13 10:03:59,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-13 10:03:59,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:03:59,988 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:04:00,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:04:00,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:00,208 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:04:00,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:04:00,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1263048203, now seen corresponding path program 5 times [2022-07-13 10:04:00,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:04:00,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066672469] [2022-07-13 10:04:00,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:00,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:00,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:00,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:04:00,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:00,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 10:04:00,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:00,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-13 10:04:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:00,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-13 10:04:00,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066672469] [2022-07-13 10:04:00,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066672469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:00,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328282916] [2022-07-13 10:04:00,400 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:04:00,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:00,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:00,402 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) [2022-07-13 10:04:00,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:04:00,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2022-07-13 10:04:00,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:04:00,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-13 10:04:00,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:00,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 650 proven. 4 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2022-07-13 10:04:00,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:04:00,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-13 10:04:00,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328282916] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:04:00,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:04:00,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-13 10:04:00,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91719886] [2022-07-13 10:04:00,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:04:00,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 10:04:00,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:04:00,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 10:04:00,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:04:00,927 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:04:00,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:04:00,949 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2022-07-13 10:04:00,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 10:04:00,949 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 142 [2022-07-13 10:04:00,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:04:00,950 INFO L225 Difference]: With dead ends: 122 [2022-07-13 10:04:00,951 INFO L226 Difference]: Without dead ends: 81 [2022-07-13 10:04:00,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-13 10:04:00,952 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:04:00,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:04:00,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-13 10:04:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-07-13 10:04:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 76 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:04:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2022-07-13 10:04:00,958 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 142 [2022-07-13 10:04:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:04:00,959 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2022-07-13 10:04:00,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:04:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2022-07-13 10:04:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-13 10:04:00,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:04:00,960 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:04:00,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:04:01,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:01,186 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:04:01,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:04:01,186 INFO L85 PathProgramCache]: Analyzing trace with hash -660788349, now seen corresponding path program 6 times [2022-07-13 10:04:01,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:04:01,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097607742] [2022-07-13 10:04:01,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:01,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:01,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:04:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:01,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 10:04:01,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:01,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-13 10:04:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-13 10:04:01,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:01,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097607742] [2022-07-13 10:04:01,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097607742] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:01,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752719011] [2022-07-13 10:04:01,361 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:04:01,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:01,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:01,362 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) [2022-07-13 10:04:01,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:04:01,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-13 10:04:01,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:04:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:04:01,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2022-07-13 10:04:01,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:04:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2022-07-13 10:04:01,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752719011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:04:01,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:04:01,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2022-07-13 10:04:01,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948743396] [2022-07-13 10:04:01,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:04:01,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 10:04:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:04:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 10:04:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:04:01,918 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:04:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:04:01,943 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2022-07-13 10:04:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-13 10:04:01,943 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 150 [2022-07-13 10:04:01,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:04:01,945 INFO L225 Difference]: With dead ends: 128 [2022-07-13 10:04:01,945 INFO L226 Difference]: Without dead ends: 87 [2022-07-13 10:04:01,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:04:01,946 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:04:01,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:04:01,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-13 10:04:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-07-13 10:04:01,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 82 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:04:01,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2022-07-13 10:04:01,952 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 150 [2022-07-13 10:04:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:04:01,952 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2022-07-13 10:04:01,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-13 10:04:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2022-07-13 10:04:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-13 10:04:01,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:04:01,954 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:04:01,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:04:02,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-13 10:04:02,182 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:04:02,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:04:02,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1766594339, now seen corresponding path program 7 times [2022-07-13 10:04:02,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:04:02,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905370981] [2022-07-13 10:04:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:02,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:02,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:04:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:02,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 10:04:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:03,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-13 10:04:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:03,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-07-13 10:04:03,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:03,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905370981] [2022-07-13 10:04:03,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905370981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:03,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051186691] [2022-07-13 10:04:03,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:04:03,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:03,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:03,288 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) [2022-07-13 10:04:03,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:04:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:03,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-13 10:04:03,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2022-07-13 10:04:04,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:04:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-07-13 10:04:05,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051186691] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:04:05,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:04:05,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 38 [2022-07-13 10:04:05,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920905329] [2022-07-13 10:04:05,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:04:05,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-13 10:04:05,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:04:05,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-13 10:04:05,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2022-07-13 10:04:05,234 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 10:04:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:04:05,887 INFO L93 Difference]: Finished difference Result 293 states and 410 transitions. [2022-07-13 10:04:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-13 10:04:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) Word has length 156 [2022-07-13 10:04:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:04:05,892 INFO L225 Difference]: With dead ends: 293 [2022-07-13 10:04:05,892 INFO L226 Difference]: Without dead ends: 289 [2022-07-13 10:04:05,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 307 SyntacticMatches, 14 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 10:04:05,893 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 65 mSDsluCounter, 3126 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 3257 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:04:05,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 3257 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-13 10:04:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-07-13 10:04:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 229. [2022-07-13 10:04:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 221 states have (on average 1.2714932126696832) internal successors, (281), 222 states have internal predecessors, (281), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-13 10:04:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2022-07-13 10:04:05,919 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 156 [2022-07-13 10:04:05,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:04:05,920 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2022-07-13 10:04:05,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 31 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 7 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-13 10:04:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2022-07-13 10:04:05,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-13 10:04:05,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:04:05,922 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:04:05,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:04:06,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 10:04:06,145 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:04:06,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:04:06,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1086535969, now seen corresponding path program 1 times [2022-07-13 10:04:06,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:04:06,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061039962] [2022-07-13 10:04:06,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:06,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:07,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:04:07,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:07,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 10:04:07,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:07,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-13 10:04:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 648 proven. 621 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2022-07-13 10:04:07,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061039962] [2022-07-13 10:04:07,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061039962] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:07,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6056406] [2022-07-13 10:04:07,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:07,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:07,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:07,592 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) [2022-07-13 10:04:07,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:04:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:07,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-13 10:04:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:07,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2022-07-13 10:04:08,007 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 17 treesize of output 13 [2022-07-13 10:04:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 651 proven. 487 refuted. 0 times theorem prover too weak. 453 trivial. 0 not checked. [2022-07-13 10:04:08,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:04:10,009 INFO L356 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2022-07-13 10:04:10,009 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 34 treesize of output 29 [2022-07-13 10:04:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 676 proven. 460 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-13 10:04:10,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6056406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:04:10,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:04:10,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22, 20] total 62 [2022-07-13 10:04:10,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148897622] [2022-07-13 10:04:10,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:04:10,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-13 10:04:10,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:04:10,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-13 10:04:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=3557, Unknown=0, NotChecked=0, Total=3782 [2022-07-13 10:04:10,071 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand has 62 states, 60 states have (on average 2.8) internal successors, (168), 59 states have internal predecessors, (168), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 10:04:12,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:04:12,243 INFO L93 Difference]: Finished difference Result 526 states and 716 transitions. [2022-07-13 10:04:12,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-13 10:04:12,244 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 60 states have (on average 2.8) internal successors, (168), 59 states have internal predecessors, (168), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 156 [2022-07-13 10:04:12,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:04:12,247 INFO L225 Difference]: With dead ends: 526 [2022-07-13 10:04:12,247 INFO L226 Difference]: Without dead ends: 474 [2022-07-13 10:04:12,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 319 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=560, Invalid=7996, Unknown=0, NotChecked=0, Total=8556 [2022-07-13 10:04:12,250 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 239 mSDsluCounter, 1388 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 2895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 864 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:04:12,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1446 Invalid, 2895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1959 Invalid, 0 Unknown, 864 Unchecked, 1.1s Time] [2022-07-13 10:04:12,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-07-13 10:04:12,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 443. [2022-07-13 10:04:12,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 430 states have (on average 1.3093023255813954) internal successors, (563), 434 states have internal predecessors, (563), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2022-07-13 10:04:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 598 transitions. [2022-07-13 10:04:12,281 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 598 transitions. Word has length 156 [2022-07-13 10:04:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:04:12,282 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 598 transitions. [2022-07-13 10:04:12,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 60 states have (on average 2.8) internal successors, (168), 59 states have internal predecessors, (168), 4 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 10:04:12,282 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 598 transitions. [2022-07-13 10:04:12,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-13 10:04:12,285 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:04:12,285 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:04:12,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:04:12,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-13 10:04:12,504 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:04:12,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:04:12,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1508428901, now seen corresponding path program 2 times [2022-07-13 10:04:12,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:04:12,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173509530] [2022-07-13 10:04:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:12,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:13,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:04:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 10:04:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:13,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-13 10:04:13,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:14,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 326 proven. 1092 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2022-07-13 10:04:14,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:14,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173509530] [2022-07-13 10:04:14,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173509530] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:14,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058013551] [2022-07-13 10:04:14,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:04:14,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:14,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:14,241 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) [2022-07-13 10:04:14,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:04:14,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:04:14,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:04:14,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 125 conjunts are in the unsatisfiable core [2022-07-13 10:04:14,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:14,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:14,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:14,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:14,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 33 [2022-07-13 10:04:14,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:14,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:15,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:15,018 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:15,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:15,054 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:15,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:15,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:15,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:15,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:15,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:15,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:15,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:15,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:15,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:15,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 28 [2022-07-13 10:04:15,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:15,313 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-13 10:04:15,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:04:15,381 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:04:15,381 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 29 [2022-07-13 10:04:16,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 27 proven. 1416 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-07-13 10:04:16,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:04:40,492 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-07-13 10:04:40,492 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 38 treesize of output 31 [2022-07-13 10:04:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 367 proven. 974 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-13 10:04:41,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058013551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:04:41,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:04:41,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 49, 44] total 96 [2022-07-13 10:04:41,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376394121] [2022-07-13 10:04:41,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:04:41,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-07-13 10:04:41,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:04:41,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-07-13 10:04:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=8682, Unknown=30, NotChecked=0, Total=9120 [2022-07-13 10:04:41,160 INFO L87 Difference]: Start difference. First operand 443 states and 598 transitions. Second operand has 96 states, 96 states have (on average 2.3958333333333335) internal successors, (230), 95 states have internal predecessors, (230), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 10:04:44,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:04:44,264 INFO L93 Difference]: Finished difference Result 1180 states and 1633 transitions. [2022-07-13 10:04:44,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-13 10:04:44,265 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.3958333333333335) internal successors, (230), 95 states have internal predecessors, (230), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 156 [2022-07-13 10:04:44,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:04:44,270 INFO L225 Difference]: With dead ends: 1180 [2022-07-13 10:04:44,273 INFO L226 Difference]: Without dead ends: 1089 [2022-07-13 10:04:44,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 279 SyntacticMatches, 18 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4632 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=791, Invalid=14929, Unknown=30, NotChecked=0, Total=15750 [2022-07-13 10:04:44,279 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 159 mSDsluCounter, 3327 mSDsCounter, 0 mSdLazyCounter, 2793 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 3406 SdHoareTripleChecker+Invalid, 5257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2419 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:04:44,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 3406 Invalid, 5257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2793 Invalid, 0 Unknown, 2419 Unchecked, 1.4s Time] [2022-07-13 10:04:44,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-07-13 10:04:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 1038. [2022-07-13 10:04:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1011 states have (on average 1.3194856577645895) internal successors, (1334), 1021 states have internal predecessors, (1334), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (93), 11 states have call predecessors, (93), 11 states have call successors, (93) [2022-07-13 10:04:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1438 transitions. [2022-07-13 10:04:44,382 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1438 transitions. Word has length 156 [2022-07-13 10:04:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:04:44,382 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1438 transitions. [2022-07-13 10:04:44,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.3958333333333335) internal successors, (230), 95 states have internal predecessors, (230), 6 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-13 10:04:44,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1438 transitions. [2022-07-13 10:04:44,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-13 10:04:44,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:04:44,390 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:04:44,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:04:44,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 10:04:44,603 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:04:44,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:04:44,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1248509279, now seen corresponding path program 3 times [2022-07-13 10:04:44,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:04:44,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827497897] [2022-07-13 10:04:44,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:04:44,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:04:44,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:45,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-13 10:04:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:46,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-13 10:04:46,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:46,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-07-13 10:04:46,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:04:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 326 proven. 1094 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-13 10:04:46,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:04:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827497897] [2022-07-13 10:04:46,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827497897] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:04:46,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390071610] [2022-07-13 10:04:46,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:04:46,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:04:46,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:04:46,388 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) [2022-07-13 10:04:46,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:04:47,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-13 10:04:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:04:47,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-13 10:04:47,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:04:47,614 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:04:47,615 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 39 treesize of output 32 [2022-07-13 10:04:47,678 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:04:47,678 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 39 treesize of output 32 [2022-07-13 10:04:47,748 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:04:47,749 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 39 treesize of output 32 [2022-07-13 10:04:47,805 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:04:47,805 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 39 treesize of output 32 [2022-07-13 10:04:47,860 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-13 10:04:47,860 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 39 treesize of output 32 [2022-07-13 10:04:47,875 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-13 10:04:47,875 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 39 treesize of output 38 [2022-07-13 10:04:47,999 INFO L356 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2022-07-13 10:04:47,999 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 45 treesize of output 44 [2022-07-13 10:04:48,133 INFO L356 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2022-07-13 10:04:48,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 63 [2022-07-13 10:04:48,312 INFO L356 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2022-07-13 10:04:48,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 83 [2022-07-13 10:04:48,664 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:04:48,664 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 35 treesize of output 28 [2022-07-13 10:05:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 856 proven. 346 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2022-07-13 10:05:15,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:05:20,016 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~2#1_85| Int)) (or (not (<= |v_ULTIMATE.start_main_~i~2#1_85| (+ |c_ULTIMATE.start_main_~i~2#1| 1))) (forall ((v_ArrVal_758 Int)) (<= 0 (let ((.cse0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#x~0#1.base|) (+ |c_ULTIMATE.start_main_~#x~0#1.offset| (* |v_ULTIMATE.start_main_~i~2#1_85| 4)) v_ArrVal_758) (+ 32 |c_ULTIMATE.start_main_~#x~0#1.offset|)))) (+ .cse0 (* 2 (div (* (- 1) .cse0) 2)))))))) is different from false