./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/mapsum4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-crafted/mapsum4.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 d00a4e4676c9051eb624340f361fec0d607bdb13ab2955b117561fab63156730 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:04:12,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:04:12,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:04:12,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:04:12,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:04:12,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:04:12,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:04:12,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:04:12,918 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:04:12,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:04:12,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:04:12,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:04:12,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:04:12,927 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:04:12,929 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:04:12,930 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:04:12,931 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:04:12,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:04:12,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:04:12,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:04:12,937 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:04:12,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:04:12,939 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:04:12,940 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:04:12,941 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:04:12,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:04:12,946 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:04:12,946 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:04:12,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:04:12,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:04:12,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:04:12,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:04:12,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:04:12,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:04:12,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:04:12,950 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:04:12,950 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:04:12,951 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:04:12,951 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:04:12,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:04:12,952 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:04:12,953 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:04:12,955 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:04:12,976 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:04:12,977 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:04:12,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:04:12,978 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:04:12,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:04:12,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:04:12,979 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:04:12,979 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:04:12,979 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:04:12,980 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:04:12,980 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:04:12,980 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:04:12,981 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:04:12,981 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:04:12,981 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:04:12,981 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:04:12,981 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:04:12,981 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:04:12,982 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:04:12,982 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:04:12,982 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:04:12,982 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:04:12,982 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:04:12,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:04:12,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:04:12,983 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:04:12,983 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:04:12,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:04:12,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:04:12,984 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:04:12,984 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:04:12,984 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:04:12,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:04:12,984 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d00a4e4676c9051eb624340f361fec0d607bdb13ab2955b117561fab63156730 [2022-07-22 10:04:13,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:04:13,198 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:04:13,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:04:13,201 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:04:13,202 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:04:13,203 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/mapsum4.i [2022-07-22 10:04:13,260 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bee5b3b3/5cfc73b8944b4f3795ff5e4ca1663cff/FLAGb2386ce69 [2022-07-22 10:04:13,717 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:04:13,718 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/mapsum4.i [2022-07-22 10:04:13,723 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bee5b3b3/5cfc73b8944b4f3795ff5e4ca1663cff/FLAGb2386ce69 [2022-07-22 10:04:14,147 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1bee5b3b3/5cfc73b8944b4f3795ff5e4ca1663cff [2022-07-22 10:04:14,150 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:04:14,151 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:04:14,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:04:14,153 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:04:14,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:04:14,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@459195ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14, skipping insertion in model container [2022-07-22 10:04:14,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:04:14,174 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:04:14,332 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-crafted/mapsum4.i[1318,1331] [2022-07-22 10:04:14,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:04:14,344 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:04:14,363 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-crafted/mapsum4.i[1318,1331] [2022-07-22 10:04:14,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:04:14,374 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:04:14,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14 WrapperNode [2022-07-22 10:04:14,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:04:14,375 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:04:14,375 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:04:14,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:04:14,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,412 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-07-22 10:04:14,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:04:14,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:04:14,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:04:14,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:04:14,421 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,421 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,428 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,432 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:04:14,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:04:14,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:04:14,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:04:14,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (1/1) ... [2022-07-22 10:04:14,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:04:14,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:14,471 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) [2022-07-22 10:04:14,472 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 [2022-07-22 10:04:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:04:14,507 INFO L130 BoogieDeclarations]: Found specification of procedure mapsum [2022-07-22 10:04:14,508 INFO L138 BoogieDeclarations]: Found implementation of procedure mapsum [2022-07-22 10:04:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:04:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:04:14,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:04:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:04:14,509 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:04:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:04:14,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:04:14,576 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:04:14,577 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:04:14,804 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:04:14,811 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:04:14,812 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 10:04:14,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:04:14 BoogieIcfgContainer [2022-07-22 10:04:14,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:04:14,820 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:04:14,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:04:14,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:04:14,833 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:04:14" (1/3) ... [2022-07-22 10:04:14,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ae36a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:04:14, skipping insertion in model container [2022-07-22 10:04:14,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:04:14" (2/3) ... [2022-07-22 10:04:14,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ae36a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:04:14, skipping insertion in model container [2022-07-22 10:04:14,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:04:14" (3/3) ... [2022-07-22 10:04:14,835 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum4.i [2022-07-22 10:04:14,849 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:04:14,863 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:04:14,928 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:04:14,949 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@27e26882, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@32a631c0 [2022-07-22 10:04:14,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:04:14,953 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:14,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 10:04:14,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:14,963 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:14,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:14,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:14,973 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2022-07-22 10:04:14,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:14,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95621095] [2022-07-22 10:04:14,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:15,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 10:04:15,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-22 10:04:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 10:04:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,243 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 10:04:15,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:15,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95621095] [2022-07-22 10:04:15,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95621095] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:15,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873758941] [2022-07-22 10:04:15,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:15,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:15,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:15,250 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) [2022-07-22 10:04:15,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:04:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 10:04:15,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 10:04:15,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:04:15,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873758941] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:04:15,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 10:04:15,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 10:04:15,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635589730] [2022-07-22 10:04:15,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:04:15,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 10:04:15,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:15,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 10:04:15,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 10:04:15,387 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 10:04:15,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:15,410 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-07-22 10:04:15,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 10:04:15,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-22 10:04:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:15,418 INFO L225 Difference]: With dead ends: 50 [2022-07-22 10:04:15,418 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 10:04:15,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 10:04:15,424 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 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 [2022-07-22 10:04:15,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:04:15,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 10:04:15,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-07-22 10:04:15,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-22 10:04:15,453 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-07-22 10:04:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:15,466 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-22 10:04:15,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 10:04:15,467 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-22 10:04:15,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-22 10:04:15,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:15,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:15,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:15,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-22 10:04:15,670 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:15,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:15,671 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2022-07-22 10:04:15,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:15,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269959116] [2022-07-22 10:04:15,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:15,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 10:04:15,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-22 10:04:15,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-22 10:04:15,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 10:04:15,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:15,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269959116] [2022-07-22 10:04:15,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269959116] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:15,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084069151] [2022-07-22 10:04:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:15,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:15,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:15,770 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) [2022-07-22 10:04:15,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:04:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:15,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 10:04:15,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:15,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:04:15,841 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:04:15,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084069151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:04:15,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 10:04:15,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 10:04:15,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110709286] [2022-07-22 10:04:15,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:04:15,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 10:04:15,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:15,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 10:04:15,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 10:04:15,844 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:04:15,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:15,853 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-07-22 10:04:15,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 10:04:15,854 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-22 10:04:15,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:15,855 INFO L225 Difference]: With dead ends: 42 [2022-07-22 10:04:15,855 INFO L226 Difference]: Without dead ends: 25 [2022-07-22 10:04:15,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 10:04:15,857 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 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 [2022-07-22 10:04:15,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:04:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-22 10:04:15,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-22 10:04:15,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:15,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-22 10:04:15,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-07-22 10:04:15,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:15,862 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-22 10:04:15,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:04:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-22 10:04:15,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 10:04:15,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:15,864 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:15,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:16,087 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,SelfDestructingSolverStorable1 [2022-07-22 10:04:16,088 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:16,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:16,088 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2022-07-22 10:04:16,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:16,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825576106] [2022-07-22 10:04:16,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:16,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 10:04:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 10:04:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 10:04:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 10:04:16,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:16,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825576106] [2022-07-22 10:04:16,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825576106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:16,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006164516] [2022-07-22 10:04:16,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:16,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:16,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:16,209 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) [2022-07-22 10:04:16,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:04:16,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 10:04:16,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-22 10:04:16,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 10:04:16,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006164516] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:04:16,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 10:04:16,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-22 10:04:16,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728948721] [2022-07-22 10:04:16,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:04:16,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 10:04:16,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 10:04:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:04:16,308 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:04:16,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:16,318 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-22 10:04:16,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 10:04:16,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-22 10:04:16,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:16,320 INFO L225 Difference]: With dead ends: 39 [2022-07-22 10:04:16,320 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 10:04:16,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 10:04:16,321 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 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 [2022-07-22 10:04:16,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:04:16,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 10:04:16,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-07-22 10:04:16,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:16,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-22 10:04:16,325 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-07-22 10:04:16,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:16,326 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-22 10:04:16,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 10:04:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-22 10:04:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 10:04:16,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:16,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:16,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:16,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:16,540 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:16,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:16,540 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2022-07-22 10:04:16,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:16,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93772605] [2022-07-22 10:04:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:16,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-22 10:04:16,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-22 10:04:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 10:04:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,651 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 10:04:16,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:16,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93772605] [2022-07-22 10:04:16,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93772605] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:16,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738156309] [2022-07-22 10:04:16,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:16,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:16,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:16,660 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) [2022-07-22 10:04:16,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:04:16,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:16,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 10:04:16,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 10:04:16,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-22 10:04:16,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738156309] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:16,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:16,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-22 10:04:16,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097326472] [2022-07-22 10:04:16,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:16,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 10:04:16,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:16,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 10:04:16,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:04:16,838 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:04:16,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:16,891 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-22 10:04:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 10:04:16,892 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-07-22 10:04:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:16,894 INFO L225 Difference]: With dead ends: 54 [2022-07-22 10:04:16,894 INFO L226 Difference]: Without dead ends: 34 [2022-07-22 10:04:16,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 10:04:16,899 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:16,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:04:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-22 10:04:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-07-22 10:04:16,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:16,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-22 10:04:16,915 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-07-22 10:04:16,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:16,916 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-22 10:04:16,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:04:16,916 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-22 10:04:16,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 10:04:16,917 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:16,918 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:16,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:17,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:17,124 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:17,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2022-07-22 10:04:17,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:17,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888999314] [2022-07-22 10:04:17,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:17,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:17,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:17,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-22 10:04:17,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:17,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 10:04:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:17,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-22 10:04:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-22 10:04:17,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:17,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888999314] [2022-07-22 10:04:17,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888999314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:17,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914498970] [2022-07-22 10:04:17,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:04:17,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:17,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:17,248 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) [2022-07-22 10:04:17,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:04:17,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:04:17,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:04:17,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:04:17,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:17,404 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 10:04:17,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 10:04:17,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914498970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:17,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:17,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-22 10:04:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500785888] [2022-07-22 10:04:17,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:17,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 10:04:17,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:17,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 10:04:17,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:04:17,503 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 10:04:17,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:17,550 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-07-22 10:04:17,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 10:04:17,550 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-07-22 10:04:17,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:17,551 INFO L225 Difference]: With dead ends: 70 [2022-07-22 10:04:17,551 INFO L226 Difference]: Without dead ends: 48 [2022-07-22 10:04:17,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 10:04:17,552 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:17,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:04:17,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-22 10:04:17,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-22 10:04:17,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:17,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-22 10:04:17,559 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-07-22 10:04:17,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:17,559 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-22 10:04:17,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 10:04:17,560 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-22 10:04:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 10:04:17,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:17,561 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:17,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:17,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:17,785 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:17,786 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2022-07-22 10:04:17,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:17,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152237690] [2022-07-22 10:04:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:17,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:17,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:04:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:17,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-22 10:04:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:17,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-22 10:04:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:17,970 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-22 10:04:17,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:17,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152237690] [2022-07-22 10:04:17,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152237690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:17,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377839077] [2022-07-22 10:04:17,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:04:17,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:17,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:17,973 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) [2022-07-22 10:04:17,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:04:18,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 10:04:18,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:04:18,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:04:18,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-22 10:04:18,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:18,125 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-22 10:04:18,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377839077] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:18,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:18,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-07-22 10:04:18,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574072644] [2022-07-22 10:04:18,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:18,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 10:04:18,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:18,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 10:04:18,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:04:18,128 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:18,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:18,195 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-07-22 10:04:18,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 10:04:18,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-07-22 10:04:18,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:18,197 INFO L225 Difference]: With dead ends: 82 [2022-07-22 10:04:18,197 INFO L226 Difference]: Without dead ends: 58 [2022-07-22 10:04:18,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-07-22 10:04:18,198 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:18,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:04:18,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-22 10:04:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-07-22 10:04:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-22 10:04:18,205 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-07-22 10:04:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:18,205 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-22 10:04:18,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-22 10:04:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-22 10:04:18,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:18,207 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:18,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:18,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:18,412 INFO L85 PathProgramCache]: Analyzing trace with hash 161581377, now seen corresponding path program 4 times [2022-07-22 10:04:18,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:18,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721430316] [2022-07-22 10:04:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:18,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:18,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:18,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-22 10:04:18,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:18,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 10:04:18,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:18,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-07-22 10:04:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:18,585 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-22 10:04:18,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721430316] [2022-07-22 10:04:18,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721430316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:18,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69943605] [2022-07-22 10:04:18,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:04:18,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:18,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:18,587 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) [2022-07-22 10:04:18,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 10:04:18,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:04:18,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:04:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 10:04:18,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-07-22 10:04:18,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-07-22 10:04:18,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69943605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:18,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:18,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-07-22 10:04:18,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412537542] [2022-07-22 10:04:18,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:18,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 10:04:18,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 10:04:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:04:18,772 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:18,824 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-22 10:04:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 10:04:18,825 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-07-22 10:04:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:18,825 INFO L225 Difference]: With dead ends: 100 [2022-07-22 10:04:18,825 INFO L226 Difference]: Without dead ends: 68 [2022-07-22 10:04:18,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-07-22 10:04:18,827 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:18,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:04:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-22 10:04:18,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-07-22 10:04:18,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:18,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-07-22 10:04:18,834 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-07-22 10:04:18,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:18,835 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-07-22 10:04:18,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:18,835 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-07-22 10:04:18,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-22 10:04:18,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:18,836 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:18,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:19,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:19,044 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:19,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1010910917, now seen corresponding path program 5 times [2022-07-22 10:04:19,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:19,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344757579] [2022-07-22 10:04:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:19,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:19,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-22 10:04:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:19,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-22 10:04:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:19,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:04:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-07-22 10:04:19,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:19,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344757579] [2022-07-22 10:04:19,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344757579] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:19,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977510843] [2022-07-22 10:04:19,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:04:19,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:19,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:19,244 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) [2022-07-22 10:04:19,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 10:04:20,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-22 10:04:20,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:04:20,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:04:20,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-22 10:04:20,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-22 10:04:20,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977510843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:20,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:20,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-07-22 10:04:20,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874907930] [2022-07-22 10:04:20,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:20,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:04:20,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:20,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:04:20,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:04:20,240 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:20,327 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-07-22 10:04:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 10:04:20,327 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-07-22 10:04:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:20,328 INFO L225 Difference]: With dead ends: 126 [2022-07-22 10:04:20,328 INFO L226 Difference]: Without dead ends: 86 [2022-07-22 10:04:20,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:04:20,330 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:20,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:04:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-22 10:04:20,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-07-22 10:04:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:20,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-07-22 10:04:20,338 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-07-22 10:04:20,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:20,339 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-07-22 10:04:20,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:20,339 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-07-22 10:04:20,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-22 10:04:20,341 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:20,341 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:20,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:20,557 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,SelfDestructingSolverStorable7 [2022-07-22 10:04:20,557 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:20,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:20,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1009519917, now seen corresponding path program 6 times [2022-07-22 10:04:20,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:20,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784592088] [2022-07-22 10:04:20,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:20,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:20,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:20,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 10:04:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:20,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-22 10:04:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:20,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-22 10:04:20,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-22 10:04:20,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784592088] [2022-07-22 10:04:20,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784592088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:20,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777559520] [2022-07-22 10:04:20,791 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:04:20,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:20,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:20,793 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) [2022-07-22 10:04:20,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 10:04:21,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-22 10:04:21,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:04:21,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 10:04:21,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:21,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-07-22 10:04:21,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:21,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-07-22 10:04:21,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777559520] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:21,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:21,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-07-22 10:04:21,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140732468] [2022-07-22 10:04:21,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:21,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 10:04:21,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:21,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 10:04:21,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-22 10:04:21,307 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:21,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:21,383 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-07-22 10:04:21,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 10:04:21,384 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-07-22 10:04:21,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:21,386 INFO L225 Difference]: With dead ends: 160 [2022-07-22 10:04:21,386 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 10:04:21,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-07-22 10:04:21,392 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:21,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:04:21,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 10:04:21,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-07-22 10:04:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:21,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-07-22 10:04:21,410 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-07-22 10:04:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:21,410 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-07-22 10:04:21,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:21,410 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-07-22 10:04:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 10:04:21,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:21,412 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:21,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:21,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:21,632 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:21,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:21,632 INFO L85 PathProgramCache]: Analyzing trace with hash -794036833, now seen corresponding path program 7 times [2022-07-22 10:04:21,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:21,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111006842] [2022-07-22 10:04:21,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:21,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:21,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:21,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:04:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:21,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-22 10:04:21,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:21,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-22 10:04:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-22 10:04:21,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:21,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111006842] [2022-07-22 10:04:21,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111006842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:21,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677318272] [2022-07-22 10:04:21,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:04:21,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:21,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:21,879 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) [2022-07-22 10:04:21,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 10:04:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:22,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:04:22,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-22 10:04:22,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-22 10:04:22,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677318272] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:22,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:22,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-22 10:04:22,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921490347] [2022-07-22 10:04:22,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:22,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 10:04:22,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:22,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 10:04:22,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 10:04:22,396 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:04:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:22,471 INFO L93 Difference]: Finished difference Result 207 states and 230 transitions. [2022-07-22 10:04:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 10:04:22,472 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-07-22 10:04:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:22,472 INFO L225 Difference]: With dead ends: 207 [2022-07-22 10:04:22,472 INFO L226 Difference]: Without dead ends: 135 [2022-07-22 10:04:22,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 10:04:22,474 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 30 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:22,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 112 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:04:22,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-22 10:04:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-07-22 10:04:22,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.023076923076923) internal successors, (133), 130 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:22,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2022-07-22 10:04:22,480 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 168 [2022-07-22 10:04:22,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:22,481 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2022-07-22 10:04:22,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 states have internal predecessors, (85), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:04:22,481 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2022-07-22 10:04:22,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-07-22 10:04:22,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:22,483 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 30, 30, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:22,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:22,712 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,SelfDestructingSolverStorable9 [2022-07-22 10:04:22,712 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1814541889, now seen corresponding path program 8 times [2022-07-22 10:04:22,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:22,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57909706] [2022-07-22 10:04:22,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:22,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:23,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:04:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:23,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-07-22 10:04:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:23,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2022-07-22 10:04:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:23,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-22 10:04:23,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57909706] [2022-07-22 10:04:23,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57909706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:23,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116363596] [2022-07-22 10:04:23,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:04:23,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:23,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:23,283 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) [2022-07-22 10:04:23,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 10:04:23,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:04:23,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:04:23,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 10:04:23,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-22 10:04:23,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2959 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-22 10:04:24,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116363596] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:24,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:24,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2022-07-22 10:04:24,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435097848] [2022-07-22 10:04:24,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:24,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 10:04:24,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:24,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 10:04:24,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 10:04:24,747 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:04:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:24,910 INFO L93 Difference]: Finished difference Result 271 states and 310 transitions. [2022-07-22 10:04:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 10:04:24,911 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 200 [2022-07-22 10:04:24,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:24,915 INFO L225 Difference]: With dead ends: 271 [2022-07-22 10:04:24,915 INFO L226 Difference]: Without dead ends: 199 [2022-07-22 10:04:24,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 374 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 10:04:24,917 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:24,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 178 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:04:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-22 10:04:24,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-07-22 10:04:24,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:24,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2022-07-22 10:04:24,927 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 200 [2022-07-22 10:04:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:24,927 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2022-07-22 10:04:24,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-22 10:04:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2022-07-22 10:04:24,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-07-22 10:04:24,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:24,930 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:24,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:25,143 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,SelfDestructingSolverStorable10 [2022-07-22 10:04:25,143 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:25,144 INFO L85 PathProgramCache]: Analyzing trace with hash 438792703, now seen corresponding path program 9 times [2022-07-22 10:04:25,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:25,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411877721] [2022-07-22 10:04:25,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:25,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:26,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:04:26,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:26,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-07-22 10:04:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:26,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 227 [2022-07-22 10:04:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-22 10:04:26,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:26,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411877721] [2022-07-22 10:04:26,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411877721] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:26,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99210843] [2022-07-22 10:04:26,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:04:26,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:26,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:26,812 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) [2022-07-22 10:04:26,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 10:04:28,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-22 10:04:28,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:04:28,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:04:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-07-22 10:04:29,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5903 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 4859 trivial. 0 not checked. [2022-07-22 10:04:29,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99210843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:29,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:29,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 17, 17] total 95 [2022-07-22 10:04:29,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181034728] [2022-07-22 10:04:29,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:29,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-22 10:04:29,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:29,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-22 10:04:29,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-07-22 10:04:29,892 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:30,115 INFO L93 Difference]: Finished difference Result 306 states and 333 transitions. [2022-07-22 10:04:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-22 10:04:30,115 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 264 [2022-07-22 10:04:30,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:30,119 INFO L225 Difference]: With dead ends: 306 [2022-07-22 10:04:30,119 INFO L226 Difference]: Without dead ends: 234 [2022-07-22 10:04:30,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 504 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2575, Invalid=6355, Unknown=0, NotChecked=0, Total=8930 [2022-07-22 10:04:30,123 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 93 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:30,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 122 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:04:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-22 10:04:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-07-22 10:04:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.013157894736842) internal successors, (231), 228 states have internal predecessors, (231), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2022-07-22 10:04:30,133 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 264 [2022-07-22 10:04:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:30,134 INFO L495 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2022-07-22 10:04:30,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.2526315789473683) internal successors, (214), 95 states have internal predecessors, (214), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2022-07-22 10:04:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-07-22 10:04:30,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:30,139 INFO L195 NwaCegarLoop]: trace histogram [90, 90, 63, 63, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:30,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 10:04:30,362 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,SelfDestructingSolverStorable11 [2022-07-22 10:04:30,362 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:30,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1765547295, now seen corresponding path program 10 times [2022-07-22 10:04:30,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:30,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424564741] [2022-07-22 10:04:30,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:30,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:31,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2022-07-22 10:04:31,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:31,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-07-22 10:04:31,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:31,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 293 [2022-07-22 10:04:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2022-07-22 10:04:31,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:31,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424564741] [2022-07-22 10:04:31,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424564741] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:31,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038674071] [2022-07-22 10:04:31,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:04:31,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:31,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:31,928 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:04:31,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 10:04:32,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:04:32,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:04:32,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 10:04:32,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:04:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 5591 proven. 900 refuted. 0 times theorem prover too weak. 5969 trivial. 0 not checked. [2022-07-22 10:04:33,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:04:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12460 backedges. 1864 proven. 2764 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-07-22 10:04:34,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038674071] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:04:34,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:04:34,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 33, 33] total 128 [2022-07-22 10:04:34,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000291400] [2022-07-22 10:04:34,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:04:34,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-22 10:04:34,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:04:34,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-22 10:04:34,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2022-07-22 10:04:34,841 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:04:35,146 INFO L93 Difference]: Finished difference Result 404 states and 447 transitions. [2022-07-22 10:04:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-07-22 10:04:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 362 [2022-07-22 10:04:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:04:35,148 INFO L225 Difference]: With dead ends: 404 [2022-07-22 10:04:35,148 INFO L226 Difference]: Without dead ends: 300 [2022-07-22 10:04:35,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3906 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4160, Invalid=12096, Unknown=0, NotChecked=0, Total=16256 [2022-07-22 10:04:35,152 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 157 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:04:35,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 202 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:04:35,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-07-22 10:04:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-07-22 10:04:35,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:04:35,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 303 transitions. [2022-07-22 10:04:35,162 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 303 transitions. Word has length 362 [2022-07-22 10:04:35,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:04:35,162 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 303 transitions. [2022-07-22 10:04:35,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1796875) internal successors, (279), 128 states have internal predecessors, (279), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-22 10:04:35,163 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 303 transitions. [2022-07-22 10:04:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2022-07-22 10:04:35,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:04:35,171 INFO L195 NwaCegarLoop]: trace histogram [186, 186, 64, 64, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:04:35,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 10:04:35,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 10:04:35,399 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:04:35,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:04:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1972129571, now seen corresponding path program 11 times [2022-07-22 10:04:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:04:35,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809230663] [2022-07-22 10:04:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:04:35,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:04:35,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:37,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-07-22 10:04:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:37,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2022-07-22 10:04:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:37,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 423 [2022-07-22 10:04:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:04:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 39275 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 35179 trivial. 0 not checked. [2022-07-22 10:04:37,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:04:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809230663] [2022-07-22 10:04:37,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809230663] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:04:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408407852] [2022-07-22 10:04:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:04:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:04:37,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:04:37,160 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:04:37,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process