./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-multidimensional/min-2-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-multidimensional/min-2-u.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 68785685c781649dca8a870a36ccbd5837fb99f65c0418361b1a73f7848e1bda --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:54:24,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:54:24,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:54:24,220 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:54:24,221 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:54:24,222 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:54:24,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:54:24,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:54:24,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:54:24,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:54:24,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:54:24,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:54:24,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:54:24,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:54:24,234 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:54:24,236 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:54:24,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:54:24,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:54:24,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:54:24,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:54:24,243 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:54:24,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:54:24,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:54:24,245 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:54:24,246 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:54:24,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:54:24,251 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:54:24,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:54:24,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:54:24,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:54:24,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:54:24,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:54:24,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:54:24,254 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:54:24,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:54:24,255 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:54:24,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:54:24,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:54:24,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:54:24,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:54:24,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:54:24,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:54:24,259 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:54:24,278 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:54:24,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:54:24,279 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:54:24,279 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:54:24,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:54:24,280 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:54:24,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:54:24,280 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:54:24,281 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:54:24,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:54:24,281 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:54:24,281 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:54:24,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:54:24,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:54:24,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:54:24,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:54:24,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:54:24,282 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:54:24,282 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:54:24,283 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:54:24,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:54:24,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:54:24,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:54:24,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:54:24,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:54:24,284 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:54:24,284 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:54:24,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:54:24,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:54:24,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:54:24,285 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:54:24,285 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:54:24,285 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:54:24,285 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 68785685c781649dca8a870a36ccbd5837fb99f65c0418361b1a73f7848e1bda [2022-07-11 22:54:24,462 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:54:24,479 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:54:24,481 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:54:24,482 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:54:24,483 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:54:24,484 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-multidimensional/min-2-u.c [2022-07-11 22:54:24,548 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c6de6bf2/8ad516c837914bc2a83a11612c385147/FLAG5c84ed472 [2022-07-11 22:54:24,897 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:54:24,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-multidimensional/min-2-u.c [2022-07-11 22:54:24,901 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c6de6bf2/8ad516c837914bc2a83a11612c385147/FLAG5c84ed472 [2022-07-11 22:54:24,910 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c6de6bf2/8ad516c837914bc2a83a11612c385147 [2022-07-11 22:54:24,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:54:24,914 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:54:24,916 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:54:24,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:54:24,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:54:24,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:54:24" (1/1) ... [2022-07-11 22:54:24,919 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@670838e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:24, skipping insertion in model container [2022-07-11 22:54:24,920 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:54:24" (1/1) ... [2022-07-11 22:54:24,924 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:54:24,934 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:54:25,033 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-multidimensional/min-2-u.c[319,332] [2022-07-11 22:54:25,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:54:25,060 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:54:25,069 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-multidimensional/min-2-u.c[319,332] [2022-07-11 22:54:25,077 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:54:25,084 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:54:25,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25 WrapperNode [2022-07-11 22:54:25,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:54:25,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:54:25,086 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:54:25,086 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:54:25,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,099 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,120 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-07-11 22:54:25,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:54:25,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:54:25,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:54:25,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:54:25,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,142 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:54:25,157 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:54:25,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:54:25,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:54:25,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (1/1) ... [2022-07-11 22:54:25,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:54:25,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:25,181 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) [2022-07-11 22:54:25,197 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 [2022-07-11 22:54:25,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:54:25,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:54:25,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:54:25,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:54:25,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:54:25,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:54:25,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:54:25,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:54:25,257 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:54:25,258 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:54:25,345 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:54:25,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:54:25,351 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-11 22:54:25,352 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:54:25 BoogieIcfgContainer [2022-07-11 22:54:25,352 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:54:25,359 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:54:25,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:54:25,365 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:54:25,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:54:24" (1/3) ... [2022-07-11 22:54:25,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a48a94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:54:25, skipping insertion in model container [2022-07-11 22:54:25,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:54:25" (2/3) ... [2022-07-11 22:54:25,366 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a48a94f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:54:25, skipping insertion in model container [2022-07-11 22:54:25,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:54:25" (3/3) ... [2022-07-11 22:54:25,367 INFO L111 eAbstractionObserver]: Analyzing ICFG min-2-u.c [2022-07-11 22:54:25,377 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:54:25,377 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:54:25,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:54:25,411 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@6bb47831, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@34ea0bb3 [2022-07-11 22:54:25,411 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:54:25,417 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-11 22:54:25,424 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:54:25,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:54:25,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:54:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:54:25,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1824316411, now seen corresponding path program 1 times [2022-07-11 22:54:25,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:54:25,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977655755] [2022-07-11 22:54:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:54:25,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:54:25,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264195185] [2022-07-11 22:54:25,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:25,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:54:25,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:25,524 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) [2022-07-11 22:54:25,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:54:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:54:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:54:25,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:54:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:54:25,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:54:25,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:54:25,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977655755] [2022-07-11 22:54:25,637 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:54:25,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264195185] [2022-07-11 22:54:25,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264195185] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:54:25,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:54:25,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:54:25,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414517271] [2022-07-11 22:54:25,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:54:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:54:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:54:25,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:54:25,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:54:25,666 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:25,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:54:25,698 INFO L93 Difference]: Finished difference Result 47 states and 77 transitions. [2022-07-11 22:54:25,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:54:25,700 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-11 22:54:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:54:25,704 INFO L225 Difference]: With dead ends: 47 [2022-07-11 22:54:25,704 INFO L226 Difference]: Without dead ends: 22 [2022-07-11 22:54:25,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:54:25,709 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:54:25,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 39 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:54:25,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-11 22:54:25,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-07-11 22:54:25,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-11 22:54:25,757 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 10 [2022-07-11 22:54:25,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:54:25,757 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-11 22:54:25,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:25,758 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-07-11 22:54:25,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-11 22:54:25,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:54:25,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:54:25,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:54:25,963 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 [2022-07-11 22:54:25,964 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:54:25,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:54:25,964 INFO L85 PathProgramCache]: Analyzing trace with hash 435710502, now seen corresponding path program 1 times [2022-07-11 22:54:25,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:54:25,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638420999] [2022-07-11 22:54:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:25,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:54:25,978 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:54:25,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91409422] [2022-07-11 22:54:25,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:25,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:54:25,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:25,982 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) [2022-07-11 22:54:25,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:54:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:54:26,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:54:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:54:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:54:26,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:54:26,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:54:26,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638420999] [2022-07-11 22:54:26,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:54:26,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91409422] [2022-07-11 22:54:26,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91409422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:54:26,050 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:54:26,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:54:26,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412821635] [2022-07-11 22:54:26,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:54:26,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:54:26,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:54:26,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:54:26,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:54:26,052 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:54:26,102 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2022-07-11 22:54:26,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:54:26,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-11 22:54:26,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:54:26,103 INFO L225 Difference]: With dead ends: 49 [2022-07-11 22:54:26,103 INFO L226 Difference]: Without dead ends: 32 [2022-07-11 22:54:26,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:54:26,105 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:54:26,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 23 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:54:26,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-11 22:54:26,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-11 22:54:26,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:26,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-07-11 22:54:26,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 13 [2022-07-11 22:54:26,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:54:26,116 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-07-11 22:54:26,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:26,116 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-07-11 22:54:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 22:54:26,117 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:54:26,117 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:54:26,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:54:26,331 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 [2022-07-11 22:54:26,331 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:54:26,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:54:26,332 INFO L85 PathProgramCache]: Analyzing trace with hash -263900950, now seen corresponding path program 1 times [2022-07-11 22:54:26,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:54:26,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218087133] [2022-07-11 22:54:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:26,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:54:26,339 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:54:26,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335574382] [2022-07-11 22:54:26,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:26,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:54:26,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:26,343 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) [2022-07-11 22:54:26,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:54:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:54:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:54:26,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:54:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:54:26,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:54:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:54:26,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:54:26,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218087133] [2022-07-11 22:54:26,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:54:26,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335574382] [2022-07-11 22:54:26,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335574382] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:54:26,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:54:26,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-11 22:54:26,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403955916] [2022-07-11 22:54:26,461 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:54:26,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 22:54:26,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:54:26,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 22:54:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-11 22:54:26,464 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:26,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:54:26,547 INFO L93 Difference]: Finished difference Result 73 states and 98 transitions. [2022-07-11 22:54:26,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 22:54:26,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-07-11 22:54:26,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:54:26,548 INFO L225 Difference]: With dead ends: 73 [2022-07-11 22:54:26,549 INFO L226 Difference]: Without dead ends: 53 [2022-07-11 22:54:26,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-11 22:54:26,550 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:54:26,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 41 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:54:26,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-11 22:54:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-07-11 22:54:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.302325581395349) internal successors, (56), 43 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:26,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2022-07-11 22:54:26,556 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 14 [2022-07-11 22:54:26,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:54:26,556 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2022-07-11 22:54:26,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:26,556 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2022-07-11 22:54:26,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-11 22:54:26,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:54:26,557 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:54:26,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:54:26,777 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 [2022-07-11 22:54:26,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:54:26,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:54:26,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1437205722, now seen corresponding path program 2 times [2022-07-11 22:54:26,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:54:26,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407048788] [2022-07-11 22:54:26,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:26,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:54:26,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:54:26,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875329738] [2022-07-11 22:54:26,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:54:26,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:54:26,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:26,793 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) [2022-07-11 22:54:26,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:54:26,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-11 22:54:26,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:54:26,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 22:54:26,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:54:26,846 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 22:54:26,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:54:26,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:54:26,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407048788] [2022-07-11 22:54:26,847 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:54:26,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875329738] [2022-07-11 22:54:26,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875329738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:54:26,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:54:26,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:54:26,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184174143] [2022-07-11 22:54:26,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:54:26,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:54:26,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:54:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:54:26,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:54:26,850 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:26,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:54:26,886 INFO L93 Difference]: Finished difference Result 100 states and 127 transitions. [2022-07-11 22:54:26,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:54:26,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-11 22:54:26,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:54:26,890 INFO L225 Difference]: With dead ends: 100 [2022-07-11 22:54:26,890 INFO L226 Difference]: Without dead ends: 82 [2022-07-11 22:54:26,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:54:26,893 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:54:26,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 18 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:54:26,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-11 22:54:26,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 45. [2022-07-11 22:54:26,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2022-07-11 22:54:26,911 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2022-07-11 22:54:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:54:26,911 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2022-07-11 22:54:26,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:26,912 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2022-07-11 22:54:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-11 22:54:26,912 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:54:26,913 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:54:26,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-11 22:54:27,129 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 [2022-07-11 22:54:27,129 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:54:27,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:54:27,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1223950390, now seen corresponding path program 1 times [2022-07-11 22:54:27,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:54:27,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855128582] [2022-07-11 22:54:27,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:27,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:54:27,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:54:27,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [331664754] [2022-07-11 22:54:27,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:27,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:54:27,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:27,141 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) [2022-07-11 22:54:27,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:54:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:54:27,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-11 22:54:27,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:54:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 22:54:27,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:54:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-11 22:54:27,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:54:27,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855128582] [2022-07-11 22:54:27,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:54:27,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331664754] [2022-07-11 22:54:27,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331664754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:54:27,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:54:27,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-07-11 22:54:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356454252] [2022-07-11 22:54:27,316 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:54:27,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 22:54:27,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:54:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 22:54:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-07-11 22:54:27,317 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:27,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:54:27,519 INFO L93 Difference]: Finished difference Result 148 states and 193 transitions. [2022-07-11 22:54:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 22:54:27,520 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-11 22:54:27,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:54:27,523 INFO L225 Difference]: With dead ends: 148 [2022-07-11 22:54:27,523 INFO L226 Difference]: Without dead ends: 106 [2022-07-11 22:54:27,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-07-11 22:54:27,524 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 370 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:54:27,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 55 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:54:27,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-11 22:54:27,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2022-07-11 22:54:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 86 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2022-07-11 22:54:27,547 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 32 [2022-07-11 22:54:27,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:54:27,548 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2022-07-11 22:54:27,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2022-07-11 22:54:27,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-11 22:54:27,551 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:54:27,551 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:54:27,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-11 22:54:27,762 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 [2022-07-11 22:54:27,762 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:54:27,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:54:27,763 INFO L85 PathProgramCache]: Analyzing trace with hash 307149302, now seen corresponding path program 2 times [2022-07-11 22:54:27,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:54:27,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343311577] [2022-07-11 22:54:27,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:27,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:54:27,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:54:27,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347781698] [2022-07-11 22:54:27,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:54:27,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:54:27,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:27,788 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) [2022-07-11 22:54:27,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:54:27,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:54:27,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:54:27,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 22:54:27,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:54:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-11 22:54:27,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:54:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 55 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2022-07-11 22:54:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:54:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343311577] [2022-07-11 22:54:28,115 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:54:28,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347781698] [2022-07-11 22:54:28,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347781698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:54:28,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:54:28,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-11 22:54:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561067190] [2022-07-11 22:54:28,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:54:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-11 22:54:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:54:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-11 22:54:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-07-11 22:54:28,117 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:28,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:54:28,509 INFO L93 Difference]: Finished difference Result 298 states and 385 transitions. [2022-07-11 22:54:28,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-11 22:54:28,509 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-11 22:54:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:54:28,510 INFO L225 Difference]: With dead ends: 298 [2022-07-11 22:54:28,510 INFO L226 Difference]: Without dead ends: 214 [2022-07-11 22:54:28,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-07-11 22:54:28,512 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 637 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:54:28,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 123 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:54:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-11 22:54:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 171. [2022-07-11 22:54:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.2882352941176471) internal successors, (219), 170 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 219 transitions. [2022-07-11 22:54:28,524 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 219 transitions. Word has length 56 [2022-07-11 22:54:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:54:28,524 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 219 transitions. [2022-07-11 22:54:28,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 219 transitions. [2022-07-11 22:54:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-11 22:54:28,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:54:28,526 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:54:28,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:54:28,739 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 [2022-07-11 22:54:28,739 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:54:28,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:54:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash 270851446, now seen corresponding path program 3 times [2022-07-11 22:54:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:54:28,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532586006] [2022-07-11 22:54:28,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:28,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:54:28,760 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:54:28,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2049741484] [2022-07-11 22:54:28,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:54:28,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:54:28,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:28,765 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) [2022-07-11 22:54:28,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:54:28,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-11 22:54:28,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:54:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:54:28,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:54:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-07-11 22:54:29,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:54:29,121 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 969 trivial. 0 not checked. [2022-07-11 22:54:29,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:54:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532586006] [2022-07-11 22:54:29,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:54:29,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049741484] [2022-07-11 22:54:29,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049741484] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:54:29,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:54:29,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-07-11 22:54:29,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181069415] [2022-07-11 22:54:29,122 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:54:29,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 22:54:29,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:54:29,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 22:54:29,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-07-11 22:54:29,124 INFO L87 Difference]: Start difference. First operand 171 states and 219 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:29,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:54:29,215 INFO L93 Difference]: Finished difference Result 766 states and 981 transitions. [2022-07-11 22:54:29,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 22:54:29,216 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2022-07-11 22:54:29,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:54:29,218 INFO L225 Difference]: With dead ends: 766 [2022-07-11 22:54:29,218 INFO L226 Difference]: Without dead ends: 694 [2022-07-11 22:54:29,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-07-11 22:54:29,219 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 107 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:54:29,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 33 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:54:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2022-07-11 22:54:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 378. [2022-07-11 22:54:29,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 377 states have (on average 1.312997347480106) internal successors, (495), 377 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 495 transitions. [2022-07-11 22:54:29,245 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 495 transitions. Word has length 104 [2022-07-11 22:54:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:54:29,245 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 495 transitions. [2022-07-11 22:54:29,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:29,246 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 495 transitions. [2022-07-11 22:54:29,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-07-11 22:54:29,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:54:29,253 INFO L195 NwaCegarLoop]: trace histogram [88, 88, 88, 22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:54:29,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-11 22:54:29,469 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 [2022-07-11 22:54:29,469 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:54:29,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:54:29,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1665112998, now seen corresponding path program 4 times [2022-07-11 22:54:29,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:54:29,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361884239] [2022-07-11 22:54:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:29,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:54:29,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:54:29,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317390669] [2022-07-11 22:54:29,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:54:29,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:54:29,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:29,492 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) [2022-07-11 22:54:29,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:54:29,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:54:29,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:54:29,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-11 22:54:29,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:54:30,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-07-11 22:54:30,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:54:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12112 backedges. 651 proven. 9062 refuted. 0 times theorem prover too weak. 2399 trivial. 0 not checked. [2022-07-11 22:54:31,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:54:31,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361884239] [2022-07-11 22:54:31,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:54:31,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317390669] [2022-07-11 22:54:31,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317390669] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:54:31,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:54:31,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-07-11 22:54:31,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745961211] [2022-07-11 22:54:31,193 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:54:31,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-11 22:54:31,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:54:31,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-11 22:54:31,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1145, Invalid=2161, Unknown=0, NotChecked=0, Total=3306 [2022-07-11 22:54:31,196 INFO L87 Difference]: Start difference. First operand 378 states and 495 transitions. Second operand has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:54:33,885 INFO L93 Difference]: Finished difference Result 1965 states and 2419 transitions. [2022-07-11 22:54:33,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-07-11 22:54:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-07-11 22:54:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:54:33,892 INFO L225 Difference]: With dead ends: 1965 [2022-07-11 22:54:33,892 INFO L226 Difference]: Without dead ends: 1893 [2022-07-11 22:54:33,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 643 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10069 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=8406, Invalid=18000, Unknown=0, NotChecked=0, Total=26406 [2022-07-11 22:54:33,899 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 842 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1635 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 842 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 1635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:54:33,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [842 Valid, 992 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 1635 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-11 22:54:33,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1893 states. [2022-07-11 22:54:33,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1893 to 792. [2022-07-11 22:54:33,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 1.3236409608091024) internal successors, (1047), 791 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1047 transitions. [2022-07-11 22:54:33,943 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1047 transitions. Word has length 311 [2022-07-11 22:54:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:54:33,944 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1047 transitions. [2022-07-11 22:54:33,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2758620689655173) internal successors, (190), 58 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-11 22:54:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1047 transitions. [2022-07-11 22:54:33,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 726 [2022-07-11 22:54:33,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:54:33,952 INFO L195 NwaCegarLoop]: trace histogram [220, 220, 220, 22, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:54:33,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 22:54:34,171 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 [2022-07-11 22:54:34,171 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:54:34,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:54:34,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1543634522, now seen corresponding path program 5 times [2022-07-11 22:54:34,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:54:34,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382742923] [2022-07-11 22:54:34,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:54:34,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:54:34,213 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:54:34,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572809523] [2022-07-11 22:54:34,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:54:34,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:54:34,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:54:34,217 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) [2022-07-11 22:54:34,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process