./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_compare_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_compare_ground.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 d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 20:29:32,988 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 20:29:32,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 20:29:33,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 20:29:33,016 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 20:29:33,017 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 20:29:33,018 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 20:29:33,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 20:29:33,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 20:29:33,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 20:29:33,022 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 20:29:33,023 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 20:29:33,024 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 20:29:33,025 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 20:29:33,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 20:29:33,026 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 20:29:33,027 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 20:29:33,028 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 20:29:33,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 20:29:33,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 20:29:33,032 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 20:29:33,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 20:29:33,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 20:29:33,035 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 20:29:33,036 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 20:29:33,039 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 20:29:33,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 20:29:33,040 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 20:29:33,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 20:29:33,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 20:29:33,042 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 20:29:33,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 20:29:33,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 20:29:33,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 20:29:33,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 20:29:33,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 20:29:33,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 20:29:33,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 20:29:33,046 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 20:29:33,046 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 20:29:33,047 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 20:29:33,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 20:29:33,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 20:29:33,081 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 20:29:33,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 20:29:33,084 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 20:29:33,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 20:29:33,085 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 20:29:33,085 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 20:29:33,086 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 20:29:33,086 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 20:29:33,087 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 20:29:33,087 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 20:29:33,088 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 20:29:33,088 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 20:29:33,088 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 20:29:33,088 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 20:29:33,088 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 20:29:33,088 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 20:29:33,089 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 20:29:33,089 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 20:29:33,090 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 20:29:33,090 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 20:29:33,090 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 20:29:33,091 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 20:29:33,091 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 20:29:33,091 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 20:29:33,091 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:29:33,092 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 20:29:33,092 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 20:29:33,092 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 20:29:33,092 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 20:29:33,092 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 20:29:33,092 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 20:29:33,093 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 20:29:33,093 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 20:29:33,093 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d4cee1ffe184d6f720684150b88947bfbeafd0a7d6fa25fd546666420e94872c [2022-07-20 20:29:33,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 20:29:33,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 20:29:33,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 20:29:33,349 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 20:29:33,349 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 20:29:33,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-07-20 20:29:33,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b1b79bc6/8f837bf12900434fa37165b481877a89/FLAG9d941349a [2022-07-20 20:29:33,788 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 20:29:33,788 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i [2022-07-20 20:29:33,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b1b79bc6/8f837bf12900434fa37165b481877a89/FLAG9d941349a [2022-07-20 20:29:34,196 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b1b79bc6/8f837bf12900434fa37165b481877a89 [2022-07-20 20:29:34,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 20:29:34,202 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 20:29:34,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 20:29:34,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 20:29:34,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 20:29:34,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,211 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64cbf9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34, skipping insertion in model container [2022-07-20 20:29:34,211 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 20:29:34,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 20:29:34,397 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2022-07-20 20:29:34,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:29:34,427 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 20:29:34,440 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_compare_ground.i[816,829] [2022-07-20 20:29:34,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 20:29:34,472 INFO L208 MainTranslator]: Completed translation [2022-07-20 20:29:34,473 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34 WrapperNode [2022-07-20 20:29:34,473 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 20:29:34,474 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 20:29:34,474 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 20:29:34,475 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 20:29:34,480 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,487 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,506 INFO L137 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2022-07-20 20:29:34,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 20:29:34,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 20:29:34,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 20:29:34,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 20:29:34,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,526 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,534 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,540 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,545 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,547 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 20:29:34,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 20:29:34,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 20:29:34,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 20:29:34,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (1/1) ... [2022-07-20 20:29:34,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 20:29:34,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:29:34,581 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 20:29:34,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 20:29:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 20:29:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 20:29:34,625 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 20:29:34,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 20:29:34,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 20:29:34,626 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 20:29:34,626 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 20:29:34,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 20:29:34,687 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 20:29:34,689 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 20:29:34,859 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 20:29:34,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 20:29:34,865 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 20:29:34,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:29:34 BoogieIcfgContainer [2022-07-20 20:29:34,866 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 20:29:34,868 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 20:29:34,868 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 20:29:34,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 20:29:34,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 08:29:34" (1/3) ... [2022-07-20 20:29:34,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123e5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:29:34, skipping insertion in model container [2022-07-20 20:29:34,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 08:29:34" (2/3) ... [2022-07-20 20:29:34,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@123e5ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 08:29:34, skipping insertion in model container [2022-07-20 20:29:34,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 08:29:34" (3/3) ... [2022-07-20 20:29:34,874 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_compare_ground.i [2022-07-20 20:29:34,885 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 20:29:34,886 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 20:29:34,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 20:29:34,940 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@3a839b67, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3fc26c16 [2022-07-20 20:29:34,940 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 20:29:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:34,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-20 20:29:34,950 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:29:34,950 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:29:34,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:29:34,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:29:34,956 INFO L85 PathProgramCache]: Analyzing trace with hash -2005121311, now seen corresponding path program 1 times [2022-07-20 20:29:34,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:29:34,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450493172] [2022-07-20 20:29:34,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:34,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:29:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:29:35,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:29:35,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450493172] [2022-07-20 20:29:35,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450493172] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:29:35,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 20:29:35,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 20:29:35,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607006499] [2022-07-20 20:29:35,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:29:35,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:29:35,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:29:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:29:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:29:35,174 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:29:35,204 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2022-07-20 20:29:35,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:29:35,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-20 20:29:35,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:29:35,216 INFO L225 Difference]: With dead ends: 36 [2022-07-20 20:29:35,216 INFO L226 Difference]: Without dead ends: 17 [2022-07-20 20:29:35,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 20:29:35,226 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 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 [2022-07-20 20:29:35,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:29:35,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-20 20:29:35,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-07-20 20:29:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-20 20:29:35,260 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2022-07-20 20:29:35,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:29:35,261 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-20 20:29:35,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:35,262 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-20 20:29:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 20:29:35,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:29:35,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:29:35,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 20:29:35,264 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:29:35,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:29:35,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1565815188, now seen corresponding path program 1 times [2022-07-20 20:29:35,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:29:35,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480705061] [2022-07-20 20:29:35,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:35,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:29:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 20:29:35,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:29:35,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480705061] [2022-07-20 20:29:35,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480705061] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:29:35,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715723212] [2022-07-20 20:29:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:35,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:29:35,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:29:35,335 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:29:35,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 20:29:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 20:29:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:29:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:29:35,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 20:29:35,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715723212] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:29:35,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 20:29:35,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-20 20:29:35,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359914794] [2022-07-20 20:29:35,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:29:35,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:29:35,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:29:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:29:35,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:29:35,451 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:35,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:29:35,469 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-07-20 20:29:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:29:35,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 20:29:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:29:35,470 INFO L225 Difference]: With dead ends: 26 [2022-07-20 20:29:35,470 INFO L226 Difference]: Without dead ends: 19 [2022-07-20 20:29:35,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:29:35,472 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 29 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 [2022-07-20 20:29:35,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 29 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:29:35,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-20 20:29:35,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-07-20 20:29:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-20 20:29:35,476 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2022-07-20 20:29:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:29:35,476 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-20 20:29:35,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-20 20:29:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 20:29:35,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:29:35,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:29:35,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 20:29:35,691 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 [2022-07-20 20:29:35,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:29:35,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:29:35,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1959146159, now seen corresponding path program 1 times [2022-07-20 20:29:35,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:29:35,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958516859] [2022-07-20 20:29:35,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:35,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:29:35,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:29:35,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:29:35,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958516859] [2022-07-20 20:29:35,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958516859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:29:35,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275680979] [2022-07-20 20:29:35,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:35,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:29:35,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:29:35,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:29:35,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 20:29:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:35,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:29:35,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:29:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:29:35,860 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 20:29:35,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275680979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 20:29:35,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 20:29:35,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-20 20:29:35,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660162051] [2022-07-20 20:29:35,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 20:29:35,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 20:29:35,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:29:35,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 20:29:35,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:29:35,863 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:35,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:29:35,871 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2022-07-20 20:29:35,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 20:29:35,872 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-20 20:29:35,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:29:35,872 INFO L225 Difference]: With dead ends: 27 [2022-07-20 20:29:35,873 INFO L226 Difference]: Without dead ends: 17 [2022-07-20 20:29:35,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 20:29:35,874 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:29:35,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 35 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:29:35,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-20 20:29:35,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-20 20:29:35,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:35,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-20 20:29:35,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2022-07-20 20:29:35,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:29:35,897 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-20 20:29:35,897 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:35,897 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-20 20:29:35,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-20 20:29:35,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:29:35,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:29:35,933 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 20:29:36,107 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 [2022-07-20 20:29:36,108 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:29:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:29:36,109 INFO L85 PathProgramCache]: Analyzing trace with hash -184138797, now seen corresponding path program 1 times [2022-07-20 20:29:36,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:29:36,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078000887] [2022-07-20 20:29:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:36,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:29:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:36,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:29:36,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:29:36,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078000887] [2022-07-20 20:29:36,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078000887] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:29:36,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148708649] [2022-07-20 20:29:36,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:36,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:29:36,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:29:36,155 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:29:36,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 20:29:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:36,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 20:29:36,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:29:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:29:36,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:29:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:29:36,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148708649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:29:36,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:29:36,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 20:29:36,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552959310] [2022-07-20 20:29:36,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:29:36,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 20:29:36,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:29:36,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 20:29:36,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:29:36,326 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:36,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:29:36,366 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2022-07-20 20:29:36,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 20:29:36,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-20 20:29:36,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:29:36,368 INFO L225 Difference]: With dead ends: 35 [2022-07-20 20:29:36,368 INFO L226 Difference]: Without dead ends: 23 [2022-07-20 20:29:36,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-20 20:29:36,369 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:29:36,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 41 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 20:29:36,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-20 20:29:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-20 20:29:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:36,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-07-20 20:29:36,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2022-07-20 20:29:36,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:29:36,374 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-07-20 20:29:36,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:36,375 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-07-20 20:29:36,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 20:29:36,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:29:36,376 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:29:36,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 20:29:36,583 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 [2022-07-20 20:29:36,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:29:36,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:29:36,584 INFO L85 PathProgramCache]: Analyzing trace with hash -494561575, now seen corresponding path program 2 times [2022-07-20 20:29:36,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:29:36,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047979458] [2022-07-20 20:29:36,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:36,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:29:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:36,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-20 20:29:36,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:29:36,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047979458] [2022-07-20 20:29:36,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047979458] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:29:36,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113955307] [2022-07-20 20:29:36,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:29:36,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:29:36,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:29:36,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:29:36,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 20:29:36,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:29:36,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:29:36,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 20:29:36,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:29:36,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:29:36,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:29:36,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 20:29:36,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113955307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:29:36,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:29:36,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-20 20:29:36,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121438489] [2022-07-20 20:29:36,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:29:36,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 20:29:36,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:29:36,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 20:29:36,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 20:29:36,904 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:36,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:29:36,977 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2022-07-20 20:29:36,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 20:29:36,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 20:29:36,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:29:36,978 INFO L225 Difference]: With dead ends: 52 [2022-07-20 20:29:36,978 INFO L226 Difference]: Without dead ends: 40 [2022-07-20 20:29:36,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-20 20:29:36,980 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:29:36,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 44 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:29:36,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-07-20 20:29:36,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2022-07-20 20:29:36,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:36,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-07-20 20:29:36,987 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 20 [2022-07-20 20:29:36,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:29:36,987 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-07-20 20:29:36,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-07-20 20:29:36,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-20 20:29:36,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:29:36,989 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:29:37,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 20:29:37,191 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 [2022-07-20 20:29:37,192 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:29:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:29:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash 451448930, now seen corresponding path program 3 times [2022-07-20 20:29:37,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:29:37,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32789157] [2022-07-20 20:29:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:37,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:29:37,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:37,439 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-20 20:29:37,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:29:37,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32789157] [2022-07-20 20:29:37,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32789157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:29:37,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076219676] [2022-07-20 20:29:37,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:29:37,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:29:37,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:29:37,444 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:29:37,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 20:29:37,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 20:29:37,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:29:37,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 20:29:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:29:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 20:29:37,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:29:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-20 20:29:37,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076219676] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:29:37,630 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:29:37,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-20 20:29:37,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242861012] [2022-07-20 20:29:37,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:29:37,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 20:29:37,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:29:37,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 20:29:37,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-20 20:29:37,633 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:37,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:29:37,708 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-07-20 20:29:37,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 20:29:37,710 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-20 20:29:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:29:37,711 INFO L225 Difference]: With dead ends: 68 [2022-07-20 20:29:37,711 INFO L226 Difference]: Without dead ends: 53 [2022-07-20 20:29:37,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-20 20:29:37,713 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:29:37,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 82 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:29:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-20 20:29:37,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-07-20 20:29:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:37,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-07-20 20:29:37,722 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 35 [2022-07-20 20:29:37,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:29:37,722 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-07-20 20:29:37,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-07-20 20:29:37,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 20:29:37,724 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:29:37,724 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:29:37,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 20:29:37,927 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 [2022-07-20 20:29:37,928 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:29:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:29:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash 678799712, now seen corresponding path program 4 times [2022-07-20 20:29:37,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:29:37,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842130546] [2022-07-20 20:29:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:37,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:29:37,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:29:38,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:29:38,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842130546] [2022-07-20 20:29:38,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842130546] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:29:38,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902867877] [2022-07-20 20:29:38,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:29:38,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:29:38,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:29:38,137 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:29:38,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 20:29:38,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:29:38,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:29:38,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-20 20:29:38,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:29:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:29:38,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:29:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:29:38,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902867877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:29:38,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:29:38,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-07-20 20:29:38,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767185647] [2022-07-20 20:29:38,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:29:38,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 20:29:38,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:29:38,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 20:29:38,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-20 20:29:38,542 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:38,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:29:38,630 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2022-07-20 20:29:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 20:29:38,636 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-20 20:29:38,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:29:38,641 INFO L225 Difference]: With dead ends: 105 [2022-07-20 20:29:38,641 INFO L226 Difference]: Without dead ends: 78 [2022-07-20 20:29:38,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2022-07-20 20:29:38,645 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:29:38,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 67 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:29:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-20 20:29:38,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-20 20:29:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:38,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-07-20 20:29:38,663 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 49 [2022-07-20 20:29:38,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:29:38,663 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-07-20 20:29:38,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:29:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-07-20 20:29:38,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 20:29:38,665 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:29:38,665 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:29:38,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 20:29:38,871 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 [2022-07-20 20:29:38,872 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:29:38,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:29:38,872 INFO L85 PathProgramCache]: Analyzing trace with hash -408162682, now seen corresponding path program 5 times [2022-07-20 20:29:38,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:29:38,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450992453] [2022-07-20 20:29:38,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:29:38,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:29:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:29:39,287 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:29:39,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:29:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450992453] [2022-07-20 20:29:39,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450992453] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:29:39,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472974241] [2022-07-20 20:29:39,288 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 20:29:39,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:29:39,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:29:39,292 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:29:39,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 20:30:26,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2022-07-20 20:30:26,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:30:26,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 20:30:26,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:30:26,849 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:30:26,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:30:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:30:27,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472974241] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:30:27,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:30:27,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-20 20:30:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644612310] [2022-07-20 20:30:27,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:30:27,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-20 20:30:27,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-20 20:30:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:30:27,615 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:27,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:27,774 INFO L93 Difference]: Finished difference Result 157 states and 186 transitions. [2022-07-20 20:30:27,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 20:30:27,775 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-20 20:30:27,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:27,776 INFO L225 Difference]: With dead ends: 157 [2022-07-20 20:30:27,776 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 20:30:27,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-20 20:30:27,778 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 75 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:27,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 54 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 20:30:27,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 20:30:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-07-20 20:30:27,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:27,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-07-20 20:30:27,788 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 75 [2022-07-20 20:30:27,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:27,788 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-07-20 20:30:27,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.1320754716981134) internal successors, (113), 53 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:27,789 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-07-20 20:30:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-20 20:30:27,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:27,790 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:27,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 20:30:27,991 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 [2022-07-20 20:30:27,991 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:27,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:27,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1135775314, now seen corresponding path program 6 times [2022-07-20 20:30:27,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:27,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493169997] [2022-07-20 20:30:27,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:27,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-20 20:30:29,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:29,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493169997] [2022-07-20 20:30:29,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493169997] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:30:29,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298633574] [2022-07-20 20:30:29,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 20:30:29,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:29,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:29,233 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:30:29,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 20:30:29,396 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 20:30:29,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:30:29,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 20:30:29,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:30:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2022-07-20 20:30:29,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:30:30,112 INFO L356 Elim1Store]: treesize reduction 42, result has 50.6 percent of original size [2022-07-20 20:30:30,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 50 [2022-07-20 20:30:30,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 2540 trivial. 0 not checked. [2022-07-20 20:30:30,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298633574] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:30:30,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:30:30,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 8, 7] total 63 [2022-07-20 20:30:30,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803335742] [2022-07-20 20:30:30,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:30:30,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-20 20:30:30,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:30,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-20 20:30:30,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1411, Invalid=2495, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 20:30:30,178 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:31,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:31,907 INFO L93 Difference]: Finished difference Result 165 states and 170 transitions. [2022-07-20 20:30:31,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-20 20:30:31,907 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2022-07-20 20:30:31,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:31,908 INFO L225 Difference]: With dead ends: 165 [2022-07-20 20:30:31,908 INFO L226 Difference]: Without dead ends: 138 [2022-07-20 20:30:31,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4197, Invalid=9609, Unknown=0, NotChecked=0, Total=13806 [2022-07-20 20:30:31,913 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 95 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:31,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 63 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:30:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-20 20:30:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2022-07-20 20:30:31,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0225563909774436) internal successors, (136), 133 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2022-07-20 20:30:31,923 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 127 [2022-07-20 20:30:31,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:31,924 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2022-07-20 20:30:31,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.2063492063492065) internal successors, (139), 63 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:31,924 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2022-07-20 20:30:31,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-20 20:30:31,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:31,926 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:31,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 20:30:32,151 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 [2022-07-20 20:30:32,152 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:32,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:32,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2019846662, now seen corresponding path program 1 times [2022-07-20 20:30:32,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:32,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368909443] [2022-07-20 20:30:32,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:32,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:33,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-20 20:30:33,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:33,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368909443] [2022-07-20 20:30:33,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368909443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:30:33,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80711277] [2022-07-20 20:30:33,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:33,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:33,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:33,293 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:30:33,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 20:30:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:33,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 20:30:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:30:33,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-20 20:30:33,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:30:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2654 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-20 20:30:36,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80711277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:30:36,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:30:36,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 107 [2022-07-20 20:30:36,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417630550] [2022-07-20 20:30:36,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:30:36,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-07-20 20:30:36,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:36,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-07-20 20:30:36,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 20:30:36,411 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:36,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:36,710 INFO L93 Difference]: Finished difference Result 269 states and 325 transitions. [2022-07-20 20:30:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-07-20 20:30:36,711 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2022-07-20 20:30:36,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:36,712 INFO L225 Difference]: With dead ends: 269 [2022-07-20 20:30:36,712 INFO L226 Difference]: Without dead ends: 240 [2022-07-20 20:30:36,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2022-07-20 20:30:36,716 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 156 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:36,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 106 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 20:30:36,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-20 20:30:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-07-20 20:30:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0125523012552302) internal successors, (242), 239 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:36,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2022-07-20 20:30:36,747 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 133 [2022-07-20 20:30:36,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:36,748 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2022-07-20 20:30:36,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0934579439252334) internal successors, (224), 107 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:36,748 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2022-07-20 20:30:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-20 20:30:36,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:36,751 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:36,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 20:30:36,955 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 [2022-07-20 20:30:36,955 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:36,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash -651492388, now seen corresponding path program 2 times [2022-07-20 20:30:36,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:36,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285261846] [2022-07-20 20:30:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:36,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:30:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-20 20:30:40,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:30:40,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285261846] [2022-07-20 20:30:40,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285261846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:30:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417567161] [2022-07-20 20:30:40,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 20:30:40,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:30:40,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:30:40,820 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:30:40,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 20:30:41,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 20:30:41,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:30:41,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 106 conjunts are in the unsatisfiable core [2022-07-20 20:30:41,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:30:41,588 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-20 20:30:41,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:30:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 10869 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-20 20:30:51,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417567161] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:30:51,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:30:51,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107, 107] total 213 [2022-07-20 20:30:51,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830513468] [2022-07-20 20:30:51,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:30:51,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 213 states [2022-07-20 20:30:51,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:30:51,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 213 interpolants. [2022-07-20 20:30:51,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-20 20:30:51,454 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:52,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:30:52,200 INFO L93 Difference]: Finished difference Result 481 states and 590 transitions. [2022-07-20 20:30:52,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-07-20 20:30:52,201 INFO L78 Accepts]: Start accepts. Automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-07-20 20:30:52,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:30:52,203 INFO L225 Difference]: With dead ends: 481 [2022-07-20 20:30:52,203 INFO L226 Difference]: Without dead ends: 452 [2022-07-20 20:30:52,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 372 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=22578, Invalid=22578, Unknown=0, NotChecked=0, Total=45156 [2022-07-20 20:30:52,207 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 315 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 20:30:52,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 106 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 428 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 20:30:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-07-20 20:30:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-07-20 20:30:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 451 states have (on average 1.0066518847006651) internal successors, (454), 451 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 454 transitions. [2022-07-20 20:30:52,222 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 454 transitions. Word has length 239 [2022-07-20 20:30:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:30:52,222 INFO L495 AbstractCegarLoop]: Abstraction has 452 states and 454 transitions. [2022-07-20 20:30:52,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 213 states, 213 states have (on average 2.0469483568075115) internal successors, (436), 213 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:30:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 454 transitions. [2022-07-20 20:30:52,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-07-20 20:30:52,228 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:30:52,228 INFO L195 NwaCegarLoop]: trace histogram [210, 210, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:30:52,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 20:30:52,451 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 [2022-07-20 20:30:52,452 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:30:52,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:30:52,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1634761464, now seen corresponding path program 3 times [2022-07-20 20:30:52,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:30:52,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774342577] [2022-07-20 20:30:52,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:30:52,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:30:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:31:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 44153 backedges. 0 proven. 44100 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2022-07-20 20:31:06,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:31:06,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774342577] [2022-07-20 20:31:06,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774342577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:31:06,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575038389] [2022-07-20 20:31:06,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 20:31:06,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:31:06,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:31:06,065 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:31:06,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 20:31:06,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 20:31:06,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:31:06,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 20:31:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:31:08,128 INFO L134 CoverageAnalysis]: Checked inductivity of 44153 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 43707 trivial. 0 not checked. [2022-07-20 20:31:08,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:31:08,646 INFO L356 Elim1Store]: treesize reduction 50, result has 48.5 percent of original size [2022-07-20 20:31:08,647 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 54 [2022-07-20 20:31:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 44153 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 44126 trivial. 0 not checked. [2022-07-20 20:31:08,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575038389] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:31:08,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:31:08,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [213, 11, 9] total 228 [2022-07-20 20:31:08,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313701958] [2022-07-20 20:31:08,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:31:08,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 228 states [2022-07-20 20:31:08,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:31:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 228 interpolants. [2022-07-20 20:31:08,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22840, Invalid=28916, Unknown=0, NotChecked=0, Total=51756 [2022-07-20 20:31:08,827 INFO L87 Difference]: Start difference. First operand 452 states and 454 transitions. Second operand has 228 states, 228 states have (on average 2.0964912280701755) internal successors, (478), 228 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:31:25,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:31:25,944 INFO L93 Difference]: Finished difference Result 491 states and 496 transitions. [2022-07-20 20:31:25,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-07-20 20:31:25,945 INFO L78 Accepts]: Start accepts. Automaton has has 228 states, 228 states have (on average 2.0964912280701755) internal successors, (478), 228 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 451 [2022-07-20 20:31:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:31:25,948 INFO L225 Difference]: With dead ends: 491 [2022-07-20 20:31:25,948 INFO L226 Difference]: Without dead ends: 462 [2022-07-20 20:31:25,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1327 GetRequests, 886 SyntacticMatches, 1 SemanticMatches, 440 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27088 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=67812, Invalid=127110, Unknown=0, NotChecked=0, Total=194922 [2022-07-20 20:31:25,958 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 270 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 20:31:25,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 154 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 20:31:25,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-07-20 20:31:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 458. [2022-07-20 20:31:25,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.0065645514223194) internal successors, (460), 457 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:31:25,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 460 transitions. [2022-07-20 20:31:25,973 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 460 transitions. Word has length 451 [2022-07-20 20:31:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:31:25,974 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 460 transitions. [2022-07-20 20:31:25,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 228 states, 228 states have (on average 2.0964912280701755) internal successors, (478), 228 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:31:25,974 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 460 transitions. [2022-07-20 20:31:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2022-07-20 20:31:25,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:31:25,981 INFO L195 NwaCegarLoop]: trace histogram [211, 211, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:31:26,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-20 20:31:26,207 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 [2022-07-20 20:31:26,208 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:31:26,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:31:26,208 INFO L85 PathProgramCache]: Analyzing trace with hash 792090300, now seen corresponding path program 4 times [2022-07-20 20:31:26,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:31:26,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576040595] [2022-07-20 20:31:26,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:31:26,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:31:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 20:31:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 44580 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-20 20:31:40,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 20:31:40,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576040595] [2022-07-20 20:31:40,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576040595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 20:31:40,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709509693] [2022-07-20 20:31:40,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 20:31:40,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 20:31:40,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 20:31:40,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 20:31:40,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 20:31:41,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 20:31:41,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 20:31:41,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 3735 conjuncts, 213 conjunts are in the unsatisfiable core [2022-07-20 20:31:41,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 20:31:41,743 INFO L134 CoverageAnalysis]: Checked inductivity of 44580 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-20 20:31:41,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 20:32:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 44580 backedges. 0 proven. 44521 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-20 20:32:21,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709509693] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 20:32:21,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 20:32:21,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [214, 214, 214] total 427 [2022-07-20 20:32:21,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401005671] [2022-07-20 20:32:21,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 20:32:21,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 427 states [2022-07-20 20:32:21,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 20:32:22,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 427 interpolants. [2022-07-20 20:32:22,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-20 20:32:22,016 INFO L87 Difference]: Start difference. First operand 458 states and 460 transitions. Second operand has 427 states, 427 states have (on average 2.0234192037470726) internal successors, (864), 427 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:32:27,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 20:32:27,618 INFO L93 Difference]: Finished difference Result 917 states and 1133 transitions. [2022-07-20 20:32:27,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 426 states. [2022-07-20 20:32:27,624 INFO L78 Accepts]: Start accepts. Automaton has has 427 states, 427 states have (on average 2.0234192037470726) internal successors, (864), 427 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 457 [2022-07-20 20:32:27,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 20:32:27,628 INFO L225 Difference]: With dead ends: 917 [2022-07-20 20:32:27,628 INFO L226 Difference]: Without dead ends: 884 [2022-07-20 20:32:27,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1126 GetRequests, 701 SyntacticMatches, 0 SemanticMatches, 425 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 52.9s TimeCoverageRelationStatistics Valid=90951, Invalid=90951, Unknown=0, NotChecked=0, Total=181902 [2022-07-20 20:32:27,645 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 636 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 20:32:27,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [636 Valid, 145 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-20 20:32:27,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-07-20 20:32:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 884. [2022-07-20 20:32:27,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 1.0033975084937712) internal successors, (886), 883 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:32:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 886 transitions. [2022-07-20 20:32:27,670 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 886 transitions. Word has length 457 [2022-07-20 20:32:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 20:32:27,671 INFO L495 AbstractCegarLoop]: Abstraction has 884 states and 886 transitions. [2022-07-20 20:32:27,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 427 states, 427 states have (on average 2.0234192037470726) internal successors, (864), 427 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 20:32:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 886 transitions. [2022-07-20 20:32:27,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2022-07-20 20:32:27,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 20:32:27,679 INFO L195 NwaCegarLoop]: trace histogram [424, 424, 6, 6, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 20:32:27,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 20:32:27,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 20:32:27,897 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 20:32:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 20:32:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash -341191598, now seen corresponding path program 5 times [2022-07-20 20:32:27,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 20:32:27,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822622412] [2022-07-20 20:32:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 20:32:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 20:32:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat