./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/eqn2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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-fpi/eqn2.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 6c5e7a5b5183897e81f3d009c328161669eb0a8a3042b507053cc41bb75da51c --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:18:41,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:18:41,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:18:41,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:18:41,378 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:18:41,381 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:18:41,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:18:41,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:18:41,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:18:41,393 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:18:41,394 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:18:41,396 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:18:41,396 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:18:41,398 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:18:41,399 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:18:41,401 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:18:41,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:18:41,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:18:41,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:18:41,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:18:41,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:18:41,410 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:18:41,411 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:18:41,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:18:41,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:18:41,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:18:41,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:18:41,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:18:41,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:18:41,422 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:18:41,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:18:41,423 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:18:41,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:18:41,426 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:18:41,427 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:18:41,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:18:41,428 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:18:41,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:18:41,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:18:41,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:18:41,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:18:41,431 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:18:41,459 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:18:41,460 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:18:41,460 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:18:41,461 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:18:41,461 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:18:41,462 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:18:41,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:18:41,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:18:41,463 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:18:41,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:18:41,463 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:18:41,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:18:41,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:18:41,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:18:41,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:18:41,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:18:41,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:18:41,465 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:18:41,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:18:41,465 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:18:41,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:18:41,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:18:41,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:18:41,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:18:41,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:18:41,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:18:41,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:18:41,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:18:41,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:18:41,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:18:41,468 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:18:41,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:18:41,469 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:18:41,469 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:18:41,469 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:18:41,469 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c5e7a5b5183897e81f3d009c328161669eb0a8a3042b507053cc41bb75da51c [2023-02-16 00:18:41,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:18:41,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:18:41,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:18:41,689 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:18:41,689 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:18:41,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/eqn2.c [2023-02-16 00:18:42,782 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:18:42,977 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:18:42,977 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/eqn2.c [2023-02-16 00:18:42,982 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02afbca58/026f5614c4344b5c8afb0dbfe413a055/FLAG3efc852c5 [2023-02-16 00:18:42,996 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/02afbca58/026f5614c4344b5c8afb0dbfe413a055 [2023-02-16 00:18:43,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:18:43,006 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:18:43,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:18:43,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:18:43,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:18:43,012 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:18:42" (1/1) ... [2023-02-16 00:18:43,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5dc625fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43, skipping insertion in model container [2023-02-16 00:18:43,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:18:42" (1/1) ... [2023-02-16 00:18:43,019 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:18:43,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:18:43,166 WARN L237 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-fpi/eqn2.c[587,600] [2023-02-16 00:18:43,189 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:18:43,198 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:18:43,210 WARN L237 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-fpi/eqn2.c[587,600] [2023-02-16 00:18:43,217 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:18:43,227 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:18:43,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43 WrapperNode [2023-02-16 00:18:43,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:18:43,228 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:18:43,228 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:18:43,228 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:18:43,233 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,238 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,253 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2023-02-16 00:18:43,253 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:18:43,254 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:18:43,254 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:18:43,254 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:18:43,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,262 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,270 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,271 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:18:43,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:18:43,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:18:43,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:18:43,274 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (1/1) ... [2023-02-16 00:18:43,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:18:43,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:43,301 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) [2023-02-16 00:18:43,311 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 [2023-02-16 00:18:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:18:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:18:43,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 00:18:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 00:18:43,352 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:18:43,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:18:43,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 00:18:43,412 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:18:43,413 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:18:43,540 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:18:43,545 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:18:43,546 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 00:18:43,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:18:43 BoogieIcfgContainer [2023-02-16 00:18:43,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:18:43,549 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:18:43,549 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:18:43,552 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:18:43,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:18:42" (1/3) ... [2023-02-16 00:18:43,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd24b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:18:43, skipping insertion in model container [2023-02-16 00:18:43,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:18:43" (2/3) ... [2023-02-16 00:18:43,553 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7dd24b8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:18:43, skipping insertion in model container [2023-02-16 00:18:43,553 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:18:43" (3/3) ... [2023-02-16 00:18:43,554 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn2.c [2023-02-16 00:18:43,565 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:18:43,565 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:18:43,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:18:43,602 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1f52429b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:18:43,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:18:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) [2023-02-16 00:18:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 00:18:43,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:43,610 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:43,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:43,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:43,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2023-02-16 00:18:43,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:43,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140249726] [2023-02-16 00:18:43,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:43,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:18:43,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:43,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140249726] [2023-02-16 00:18:43,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-16 00:18:43,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658471703] [2023-02-16 00:18:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:43,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:43,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:43,746 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) [2023-02-16 00:18:43,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:18:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:18:43,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-16 00:18:43,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:43,914 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:18:43,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658471703] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:18:43,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:18:43,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:18:43,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123416618] [2023-02-16 00:18:43,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:18:43,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:18:43,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:18:43,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:18:43,941 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-16 00:18:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:43,953 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2023-02-16 00:18:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:18:43,954 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2023-02-16 00:18:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:43,960 INFO L225 Difference]: With dead ends: 38 [2023-02-16 00:18:43,960 INFO L226 Difference]: Without dead ends: 17 [2023-02-16 00:18:43,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:18:43,966 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:43,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:18:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-16 00:18:43,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-16 00:18:43,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:18:43,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-16 00:18:43,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2023-02-16 00:18:43,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:43,994 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-16 00:18:43,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-02-16 00:18:43,995 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-16 00:18:43,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 00:18:43,995 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:43,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:44,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 00:18:44,201 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 [2023-02-16 00:18:44,201 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:44,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:44,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2023-02-16 00:18:44,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:44,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420548605] [2023-02-16 00:18:44,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:44,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:44,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:44,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405990509] [2023-02-16 00:18:44,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:44,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:44,234 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) [2023-02-16 00:18:44,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 00:18:44,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:18:44,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 00:18:44,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:44,451 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-02-16 00:18:44,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-02-16 00:18:44,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:18:44,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:18:44,547 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:18:44,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-02-16 00:18:44,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-16 00:18:44,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:44,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:18:44,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:44,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420548605] [2023-02-16 00:18:44,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:44,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405990509] [2023-02-16 00:18:44,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405990509] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:18:44,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:18:44,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:18:44,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294424780] [2023-02-16 00:18:44,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:18:44,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:18:44,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:44,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:18:44,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:18:44,633 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2023-02-16 00:18:44,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:44,738 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-02-16 00:18:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 00:18:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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 12 [2023-02-16 00:18:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:44,741 INFO L225 Difference]: With dead ends: 34 [2023-02-16 00:18:44,741 INFO L226 Difference]: Without dead ends: 32 [2023-02-16 00:18:44,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-02-16 00:18:44,743 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:44,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 54 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:18:44,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-16 00:18:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2023-02-16 00:18:44,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:18:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-16 00:18:44,757 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2023-02-16 00:18:44,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:44,757 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-16 00:18:44,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 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) [2023-02-16 00:18:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-16 00:18:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 00:18:44,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:44,758 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:44,766 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 00:18:44,966 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 [2023-02-16 00:18:44,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:44,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2023-02-16 00:18:44,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:44,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141110402] [2023-02-16 00:18:44,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:44,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:45,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:45,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1493222604] [2023-02-16 00:18:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:45,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:45,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:45,008 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) [2023-02-16 00:18:45,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 00:18:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:18:45,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 00:18:45,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:45,103 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:18:45,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:45,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141110402] [2023-02-16 00:18:45,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:45,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493222604] [2023-02-16 00:18:45,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493222604] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:18:45,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:18:45,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 00:18:45,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781288926] [2023-02-16 00:18:45,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:18:45,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 00:18:45,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 00:18:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-16 00:18:45,107 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2023-02-16 00:18:45,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:45,185 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-02-16 00:18:45,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 00:18:45,186 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-16 00:18:45,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:45,188 INFO L225 Difference]: With dead ends: 49 [2023-02-16 00:18:45,188 INFO L226 Difference]: Without dead ends: 40 [2023-02-16 00:18:45,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-16 00:18:45,196 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:45,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:18:45,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-16 00:18:45,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2023-02-16 00:18:45,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 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) [2023-02-16 00:18:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-02-16 00:18:45,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2023-02-16 00:18:45,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:45,206 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-02-16 00:18:45,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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) [2023-02-16 00:18:45,206 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-02-16 00:18:45,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 00:18:45,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:45,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:45,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 00:18:45,417 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 [2023-02-16 00:18:45,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:45,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2023-02-16 00:18:45,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:45,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486590541] [2023-02-16 00:18:45,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:45,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:45,461 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:45,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [49794365] [2023-02-16 00:18:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:45,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:45,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:45,472 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) [2023-02-16 00:18:45,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 00:18:45,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:18:45,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-16 00:18:45,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:45,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:18:45,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:45,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486590541] [2023-02-16 00:18:45,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49794365] [2023-02-16 00:18:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49794365] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:18:45,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:18:45,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-02-16 00:18:45,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444005599] [2023-02-16 00:18:45,560 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:18:45,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:18:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:45,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:18:45,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:18:45,561 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-02-16 00:18:45,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:45,640 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-16 00:18:45,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 00:18:45,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 [2023-02-16 00:18:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:45,641 INFO L225 Difference]: With dead ends: 44 [2023-02-16 00:18:45,641 INFO L226 Difference]: Without dead ends: 37 [2023-02-16 00:18:45,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-16 00:18:45,642 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:45,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 45 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:18:45,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-16 00:18:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2023-02-16 00:18:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:18:45,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-16 00:18:45,647 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2023-02-16 00:18:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:45,647 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-16 00:18:45,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-02-16 00:18:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-16 00:18:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 00:18:45,648 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:45,648 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:45,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 00:18:45,853 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 [2023-02-16 00:18:45,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:45,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:45,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2023-02-16 00:18:45,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:45,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983060720] [2023-02-16 00:18:45,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:45,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:45,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:45,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1308302028] [2023-02-16 00:18:45,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:45,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:45,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:45,874 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) [2023-02-16 00:18:45,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 00:18:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:18:45,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 00:18:45,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:45,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-16 00:18:45,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:45,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983060720] [2023-02-16 00:18:45,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:45,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308302028] [2023-02-16 00:18:45,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308302028] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:18:45,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:18:45,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 00:18:45,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090971125] [2023-02-16 00:18:45,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:18:45,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 00:18:45,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 00:18:45,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-02-16 00:18:45,992 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-02-16 00:18:46,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:46,045 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-02-16 00:18:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 00:18:46,046 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 16 [2023-02-16 00:18:46,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:46,047 INFO L225 Difference]: With dead ends: 41 [2023-02-16 00:18:46,047 INFO L226 Difference]: Without dead ends: 27 [2023-02-16 00:18:46,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:18:46,048 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:46,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 27 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:18:46,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-16 00:18:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2023-02-16 00:18:46,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:18:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-02-16 00:18:46,054 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2023-02-16 00:18:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:46,054 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-02-16 00:18:46,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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) [2023-02-16 00:18:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-02-16 00:18:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 00:18:46,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:46,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:46,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 00:18:46,260 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 [2023-02-16 00:18:46,260 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:46,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:46,261 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2023-02-16 00:18:46,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:46,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018034533] [2023-02-16 00:18:46,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:46,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:46,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:46,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1110028074] [2023-02-16 00:18:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:46,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:46,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:46,290 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) [2023-02-16 00:18:46,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 00:18:46,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:18:46,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-16 00:18:46,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:46,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:18:46,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:46,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-02-16 00:18:46,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:18:46,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-16 00:18:46,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:46,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-02-16 00:18:46,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-02-16 00:18:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:46,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:18:46,614 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_158 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_158) |c_ULTIMATE.start_main_~b~0#1.base|) |c_ULTIMATE.start_main_~b~0#1.offset|) 1)) is different from false [2023-02-16 00:18:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-02-16 00:18:46,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018034533] [2023-02-16 00:18:46,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:46,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110028074] [2023-02-16 00:18:46,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110028074] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:18:46,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:18:46,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-02-16 00:18:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123015928] [2023-02-16 00:18:46,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:18:46,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 00:18:46,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 00:18:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2023-02-16 00:18:46,625 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2023-02-16 00:18:46,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:46,987 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-02-16 00:18:46,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 00:18:46,990 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) Word has length 16 [2023-02-16 00:18:46,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:46,991 INFO L225 Difference]: With dead ends: 54 [2023-02-16 00:18:46,991 INFO L226 Difference]: Without dead ends: 52 [2023-02-16 00:18:46,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=327, Unknown=1, NotChecked=40, Total=506 [2023-02-16 00:18:46,992 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:46,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 55 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 85 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2023-02-16 00:18:46,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-16 00:18:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 26. [2023-02-16 00:18:47,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 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) [2023-02-16 00:18:47,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-02-16 00:18:47,003 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2023-02-16 00:18:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:47,003 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-02-16 00:18:47,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 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) [2023-02-16 00:18:47,004 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-02-16 00:18:47,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 00:18:47,004 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:47,005 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:47,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 00:18:47,211 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 [2023-02-16 00:18:47,211 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:47,211 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2023-02-16 00:18:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:47,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121216829] [2023-02-16 00:18:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:47,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:47,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:47,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328556618] [2023-02-16 00:18:47,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:47,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:47,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:47,234 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) [2023-02-16 00:18:47,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 00:18:47,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:18:47,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 00:18:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:47,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:18:47,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:47,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-02-16 00:18:47,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-02-16 00:18:47,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:18:47,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:18:47,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:47,417 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:18:47,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-02-16 00:18:47,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:47,470 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:18:47,470 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 32 [2023-02-16 00:18:47,612 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 00:18:47,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 34 [2023-02-16 00:18:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:47,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:18:48,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:48,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121216829] [2023-02-16 00:18:48,104 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:48,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328556618] [2023-02-16 00:18:48,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328556618] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:18:48,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:18:48,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-02-16 00:18:48,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019052396] [2023-02-16 00:18:48,105 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:18:48,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 00:18:48,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:48,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 00:18:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-16 00:18:48,107 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2023-02-16 00:18:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:49,581 INFO L93 Difference]: Finished difference Result 82 states and 92 transitions. [2023-02-16 00:18:49,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 00:18:49,581 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-16 00:18:49,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:49,582 INFO L225 Difference]: With dead ends: 82 [2023-02-16 00:18:49,582 INFO L226 Difference]: Without dead ends: 80 [2023-02-16 00:18:49,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=310, Invalid=1022, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 00:18:49,583 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 182 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:49,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 105 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 00:18:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-16 00:18:49,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2023-02-16 00:18:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 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) [2023-02-16 00:18:49,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2023-02-16 00:18:49,596 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 20 [2023-02-16 00:18:49,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:49,597 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2023-02-16 00:18:49,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 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) [2023-02-16 00:18:49,597 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2023-02-16 00:18:49,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 00:18:49,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:49,598 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:49,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 00:18:49,803 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 [2023-02-16 00:18:49,803 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:49,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:49,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1334592554, now seen corresponding path program 2 times [2023-02-16 00:18:49,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:49,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050681994] [2023-02-16 00:18:49,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:49,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:49,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:49,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1470987981] [2023-02-16 00:18:49,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:18:49,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:49,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:49,861 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) [2023-02-16 00:18:49,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 00:18:49,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:18:49,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:18:49,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 00:18:49,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:49,965 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:18:49,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:18:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:18:49,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050681994] [2023-02-16 00:18:49,994 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470987981] [2023-02-16 00:18:49,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470987981] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:18:49,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:18:49,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-16 00:18:49,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132617769] [2023-02-16 00:18:49,995 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:18:49,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 00:18:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 00:18:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-16 00:18:49,996 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2023-02-16 00:18:50,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:50,115 INFO L93 Difference]: Finished difference Result 103 states and 118 transitions. [2023-02-16 00:18:50,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 00:18:50,116 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-16 00:18:50,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:50,116 INFO L225 Difference]: With dead ends: 103 [2023-02-16 00:18:50,117 INFO L226 Difference]: Without dead ends: 80 [2023-02-16 00:18:50,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-16 00:18:50,118 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:50,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:18:50,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-16 00:18:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2023-02-16 00:18:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 49 states have internal predecessors, (60), 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) [2023-02-16 00:18:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 60 transitions. [2023-02-16 00:18:50,131 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 60 transitions. Word has length 20 [2023-02-16 00:18:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:50,132 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 60 transitions. [2023-02-16 00:18:50,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 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) [2023-02-16 00:18:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 60 transitions. [2023-02-16 00:18:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 00:18:50,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:50,133 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:50,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 00:18:50,339 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 [2023-02-16 00:18:50,339 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:50,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:50,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782124, now seen corresponding path program 3 times [2023-02-16 00:18:50,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:50,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940696922] [2023-02-16 00:18:50,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:50,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:50,370 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:50,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278882773] [2023-02-16 00:18:50,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 00:18:50,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:50,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:50,379 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) [2023-02-16 00:18:50,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 00:18:50,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 00:18:50,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:18:50,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 00:18:50,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:50,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:18:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:50,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:50,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940696922] [2023-02-16 00:18:50,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:50,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278882773] [2023-02-16 00:18:50,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278882773] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:18:50,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:18:50,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-16 00:18:50,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349903508] [2023-02-16 00:18:50,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:18:50,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 00:18:50,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:50,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 00:18:50,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:18:50,635 INFO L87 Difference]: Start difference. First operand 50 states and 60 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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) [2023-02-16 00:18:50,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:50,897 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2023-02-16 00:18:50,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-16 00:18:50,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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 22 [2023-02-16 00:18:50,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:50,898 INFO L225 Difference]: With dead ends: 113 [2023-02-16 00:18:50,898 INFO L226 Difference]: Without dead ends: 81 [2023-02-16 00:18:50,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2023-02-16 00:18:50,900 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 137 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:50,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 80 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:18:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-16 00:18:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 48. [2023-02-16 00:18:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 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) [2023-02-16 00:18:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2023-02-16 00:18:50,912 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 22 [2023-02-16 00:18:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:50,913 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2023-02-16 00:18:50,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 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) [2023-02-16 00:18:50,913 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2023-02-16 00:18:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 00:18:50,914 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:50,914 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:50,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-16 00:18:51,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:51,120 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1083970380, now seen corresponding path program 2 times [2023-02-16 00:18:51,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:51,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25542364] [2023-02-16 00:18:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:51,160 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:51,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557115833] [2023-02-16 00:18:51,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:18:51,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:51,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:51,169 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:18:51,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 00:18:51,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:18:51,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:18:51,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 00:18:51,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:18:51,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:18:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:18:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25542364] [2023-02-16 00:18:51,330 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557115833] [2023-02-16 00:18:51,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557115833] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:18:51,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:18:51,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2023-02-16 00:18:51,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906917271] [2023-02-16 00:18:51,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:18:51,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 00:18:51,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:51,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 00:18:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-02-16 00:18:51,333 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2023-02-16 00:18:51,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:18:51,554 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2023-02-16 00:18:51,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 00:18:51,555 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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 24 [2023-02-16 00:18:51,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:18:51,555 INFO L225 Difference]: With dead ends: 83 [2023-02-16 00:18:51,556 INFO L226 Difference]: Without dead ends: 67 [2023-02-16 00:18:51,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2023-02-16 00:18:51,557 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 105 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:18:51,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 90 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:18:51,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-16 00:18:51,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2023-02-16 00:18:51,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 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) [2023-02-16 00:18:51,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-02-16 00:18:51,566 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 24 [2023-02-16 00:18:51,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:18:51,566 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-02-16 00:18:51,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 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) [2023-02-16 00:18:51,566 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-02-16 00:18:51,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 00:18:51,567 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:18:51,567 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:18:51,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 00:18:51,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-16 00:18:51,772 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:18:51,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:18:51,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2023-02-16 00:18:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:18:51,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113006463] [2023-02-16 00:18:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:18:51,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:18:51,802 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:18:51,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821175855] [2023-02-16 00:18:51,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 00:18:51,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:18:51,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:18:51,804 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:18:51,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 00:18:52,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 00:18:52,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:18:52,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-16 00:18:52,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:18:52,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:18:52,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-02-16 00:18:52,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-02-16 00:18:52,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:18:52,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:18:52,234 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:18:52,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2023-02-16 00:18:52,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-16 00:18:52,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 24 [2023-02-16 00:18:52,306 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:18:52,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2023-02-16 00:18:52,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 100 [2023-02-16 00:18:52,325 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:18:52,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,374 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:18:52,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-02-16 00:18:52,427 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:18:52,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 127 [2023-02-16 00:18:52,432 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:18:52,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 194 [2023-02-16 00:18:52,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 98 [2023-02-16 00:18:52,558 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:18:52,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 71 [2023-02-16 00:18:52,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 123 [2023-02-16 00:18:52,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 42 [2023-02-16 00:18:52,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:18:52,646 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:18:52,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2023-02-16 00:18:52,720 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-16 00:18:52,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2023-02-16 00:18:52,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:52,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:18:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:18:56,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:18:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113006463] [2023-02-16 00:18:56,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:18:56,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821175855] [2023-02-16 00:18:56,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821175855] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:18:56,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:18:56,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25 [2023-02-16 00:18:56,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210469902] [2023-02-16 00:18:56,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:18:56,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-16 00:18:56,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:18:56,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-16 00:18:56,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=463, Unknown=0, NotChecked=0, Total=600 [2023-02-16 00:18:56,831 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2023-02-16 00:19:06,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:19:06,525 INFO L93 Difference]: Finished difference Result 155 states and 172 transitions. [2023-02-16 00:19:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-16 00:19:06,526 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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 24 [2023-02-16 00:19:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:19:06,527 INFO L225 Difference]: With dead ends: 155 [2023-02-16 00:19:06,528 INFO L226 Difference]: Without dead ends: 153 [2023-02-16 00:19:06,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=654, Invalid=1998, Unknown=0, NotChecked=0, Total=2652 [2023-02-16 00:19:06,529 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 309 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:19:06,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 176 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-02-16 00:19:06,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-16 00:19:06,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2023-02-16 00:19:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 76 states have internal predecessors, (92), 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) [2023-02-16 00:19:06,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2023-02-16 00:19:06,546 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 24 [2023-02-16 00:19:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:19:06,547 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2023-02-16 00:19:06,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.72) internal successors, (43), 25 states have internal predecessors, (43), 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) [2023-02-16 00:19:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2023-02-16 00:19:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-16 00:19:06,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:19:06,548 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:19:06,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-16 00:19:06,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-16 00:19:06,757 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:19:06,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:19:06,758 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 3 times [2023-02-16 00:19:06,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:19:06,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945857200] [2023-02-16 00:19:06,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:19:06,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:19:06,773 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:19:06,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1160098931] [2023-02-16 00:19:06,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 00:19:06,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:19:06,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:19:06,786 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:19:06,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 00:19:06,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 00:19:06,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:19:06,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-16 00:19:06,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:19:07,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:19:07,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-02-16 00:19:07,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-02-16 00:19:07,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:19:07,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:19:07,085 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:19:07,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2023-02-16 00:19:07,090 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:19:07,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2023-02-16 00:19:07,202 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:19:07,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 73 treesize of output 67 [2023-02-16 00:19:07,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 117 [2023-02-16 00:19:07,368 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:19:07,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 151 treesize of output 137 [2023-02-16 00:19:07,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:19:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2023-02-16 00:19:07,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 163 treesize of output 101 [2023-02-16 00:19:07,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,553 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:19:07,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:19:07,556 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-02-16 00:19:07,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 62 treesize of output 56 [2023-02-16 00:19:07,909 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-16 00:19:07,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 77 treesize of output 41 [2023-02-16 00:19:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:19:07,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:19:15,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:19:15,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:19:15,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945857200] [2023-02-16 00:19:15,697 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:19:15,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160098931] [2023-02-16 00:19:15,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160098931] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:19:15,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:19:15,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2023-02-16 00:19:15,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760745778] [2023-02-16 00:19:15,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:19:15,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-16 00:19:15,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:19:15,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-16 00:19:15,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2023-02-16 00:19:15,699 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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) [2023-02-16 00:19:45,735 WARN L233 SmtUtils]: Spent 29.47s on a formula simplification. DAG size of input: 219 DAG size of output: 166 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:19:56,057 WARN L233 SmtUtils]: Spent 8.88s on a formula simplification. DAG size of input: 198 DAG size of output: 142 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:20:19,183 WARN L233 SmtUtils]: Spent 22.35s on a formula simplification. DAG size of input: 247 DAG size of output: 191 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:20:21,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:21:02,098 WARN L233 SmtUtils]: Spent 22.56s on a formula simplification. DAG size of input: 187 DAG size of output: 146 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:21:23,042 WARN L233 SmtUtils]: Spent 20.36s on a formula simplification. DAG size of input: 190 DAG size of output: 150 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:21:25,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:21:25,532 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2023-02-16 00:21:25,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-16 00:21:25,533 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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 28 [2023-02-16 00:21:25,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:21:25,533 INFO L225 Difference]: With dead ends: 120 [2023-02-16 00:21:25,533 INFO L226 Difference]: Without dead ends: 94 [2023-02-16 00:21:25,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1086 ImplicationChecksByTransitivity, 128.7s TimeCoverageRelationStatistics Valid=861, Invalid=3427, Unknown=2, NotChecked=0, Total=4290 [2023-02-16 00:21:25,535 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 203 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 77 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2023-02-16 00:21:25,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 134 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 437 Invalid, 1 Unknown, 0 Unchecked, 8.5s Time] [2023-02-16 00:21:25,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-16 00:21:25,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 71. [2023-02-16 00:21:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 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) [2023-02-16 00:21:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2023-02-16 00:21:25,554 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 28 [2023-02-16 00:21:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:21:25,555 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2023-02-16 00:21:25,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7096774193548387) internal successors, (53), 31 states have internal predecessors, (53), 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) [2023-02-16 00:21:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2023-02-16 00:21:25,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 00:21:25,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:21:25,556 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:21:25,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-16 00:21:25,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-16 00:21:25,762 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:21:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:21:25,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 4 times [2023-02-16 00:21:25,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:21:25,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700068414] [2023-02-16 00:21:25,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:21:25,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:21:25,788 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:21:25,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [190207191] [2023-02-16 00:21:25,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 00:21:25,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:21:25,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:21:25,791 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:21:25,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 00:21:26,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 00:21:26,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:21:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-16 00:21:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:21:26,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-16 00:21:26,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,136 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-02-16 00:21:26,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2023-02-16 00:21:26,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:21:26,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-02-16 00:21:26,189 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:21:26,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 109 [2023-02-16 00:21:26,197 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:21:26,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 172 [2023-02-16 00:21:26,214 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:21:26,329 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:21:26,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 71 [2023-02-16 00:21:26,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 119 [2023-02-16 00:21:26,347 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:21:26,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,424 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:21:26,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 44 [2023-02-16 00:21:26,519 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:21:26,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 141 [2023-02-16 00:21:26,527 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:21:26,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 197 [2023-02-16 00:21:26,542 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:21:26,677 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2023-02-16 00:21:26,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 171 treesize of output 149 [2023-02-16 00:21:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,689 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:21:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 213 [2023-02-16 00:21:26,733 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-16 00:21:26,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,901 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:21:26,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:21:26,906 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-02-16 00:21:26,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 89 treesize of output 72 [2023-02-16 00:21:27,201 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-02-16 00:21:27,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 44 [2023-02-16 00:21:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:21:27,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:22:28,301 WARN L233 SmtUtils]: Spent 18.48s on a formula simplification. DAG size of input: 170 DAG size of output: 136 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 00:22:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:22:28,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:22:28,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700068414] [2023-02-16 00:22:28,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 00:22:28,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190207191] [2023-02-16 00:22:28,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190207191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:22:28,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 00:22:28,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 32 [2023-02-16 00:22:28,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310309100] [2023-02-16 00:22:28,314 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 00:22:28,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 00:22:28,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:22:28,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 00:22:28,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=834, Unknown=8, NotChecked=0, Total=992 [2023-02-16 00:22:28,316 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 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) [2023-02-16 00:22:37,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:22:43,568 WARN L859 $PredicateComparison]: unable to prove that (let ((.cse91 (mod |c_ULTIMATE.start_main_~i~0#1| 4294967296)) (.cse88 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 4294967295) 4294967296))) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base|)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse74 (* .cse88 8)) (.cse86 (* .cse91 8)) (.cse90 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 1) 4294967296)) (.cse89 (mod (+ |c_ULTIMATE.start_main_~i~0#1| 2) 4294967296))) (let ((.cse7 (<= .cse91 2147483647)) (.cse34 (<= .cse89 2147483647)) (.cse85 (* .cse90 8)) (.cse4 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse86)) (.cse42 (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse74))) (.cse56 (select .cse0 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse74))) (.cse28 (<= .cse90 2147483647)) (.cse87 (* .cse89 8))) (let ((.cse5 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse87)) (.cse27 (not .cse28)) (.cse55 (store .cse0 .cse4 (+ .cse42 .cse56))) (.cse1 (+ |c_ULTIMATE.start_main_~b~0#1.offset| .cse85)) (.cse44 (select .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse26 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse85)) (.cse41 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse87)) (.cse43 (<= .cse88 2147483647)) (.cse35 (not .cse34)) (.cse18 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse87 (- 34359738368))) (.cse6 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 16)) (.cse15 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse86 (- 34359738368))) (.cse11 (+ |c_ULTIMATE.start_main_~b~0#1.offset| 8)) (.cse13 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse86)) (.cse17 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse85 (- 34359738368))) (.cse19 (not .cse7))) (and (forall ((v_ArrVal_500 Int)) (= (select (store (store .cse0 .cse1 (+ (select .cse2 .cse3) (select .cse0 .cse4))) .cse5 v_ArrVal_500) .cse6) 13)) (or (let ((.cse16 (+ .cse42 4))) (and (or .cse7 (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse14 (store (store (store .cse2 .cse15 .cse16) .cse17 v_ArrVal_492) .cse18 v_ArrVal_494))) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse14))) (let ((.cse10 (select .cse9 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse8 (select .cse10 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse12 (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse8 (select (select (store .cse9 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse10 .cse11 (+ .cse8 .cse12))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse12))))) 13))) (or .cse19 (let ((.cse25 (store .cse2 .cse3 .cse16))) (and (or (and (or (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse24 (store (store .cse25 .cse26 v_ArrVal_492) .cse18 v_ArrVal_494))) (let ((.cse21 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse24))) (let ((.cse22 (select .cse21 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse20 (select .cse24 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse23 (select .cse22 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse20 (select (select (store .cse21 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse22 .cse11 (+ .cse20 .cse23))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse23))))) 13)) .cse27) (or .cse28 (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse33 (store (store .cse25 .cse17 v_ArrVal_492) .cse18 v_ArrVal_494))) (let ((.cse31 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse33))) (let ((.cse32 (select .cse31 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse29 (select .cse33 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse30 (select .cse32 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse29 .cse30 (select (select (store .cse31 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse32 .cse11 (+ .cse29 .cse30))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13)))))) 13)))) .cse34) (or .cse35 (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse40 (store (store .cse25 .cse26 v_ArrVal_492) .cse41 v_ArrVal_494))) (let ((.cse37 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse40))) (let ((.cse38 (select .cse37 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse36 (select .cse38 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse39 (select .cse40 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse36 (select (select (store .cse37 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse38 .cse11 (+ .cse36 .cse39))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse39))))) 13)))))))) (not .cse43)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((v_ArrVal_500 Int)) (= (select (store .cse0 .cse1 v_ArrVal_500) .cse6) 13)) (= (select .cse2 .cse13) (+ .cse44 4)) (or .cse34 (and (or (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse49 (store (store .cse2 .cse26 v_ArrVal_492) .cse18 v_ArrVal_494))) (let ((.cse45 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse49))) (let ((.cse46 (select .cse45 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse47 (select .cse49 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse48 (select .cse46 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ (select (select (store .cse45 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse46 .cse11 (+ .cse47 .cse48))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse47 .cse48))))) 13)) .cse27) (or .cse28 (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse54 (store (store .cse2 .cse17 v_ArrVal_492) .cse18 v_ArrVal_494))) (let ((.cse51 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse54))) (let ((.cse52 (select .cse51 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse50 (select .cse52 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse53 (select .cse54 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse50 (select (select (store .cse51 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse52 .cse11 (+ .cse50 .cse53))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse53))))) 13))))) (forall ((v_ArrVal_500 Int)) (= (select (store (store .cse55 .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~b~0#1.base| .cse55) |c_ULTIMATE.start_main_~a~0#1.base|) .cse3) .cse42 .cse56)) .cse5 v_ArrVal_500) .cse6) 13)) (exists ((|ULTIMATE.start_main_~a~0#1.base| Int)) (let ((.cse58 (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse57 (select .cse58 8))) (and (= .cse57 8) (= (select .cse0 .cse6) (+ .cse57 5)) (= (select .cse58 0) 4))))) (or (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse63 (store (store .cse2 .cse3 v_ArrVal_492) .cse26 v_ArrVal_494))) (let ((.cse60 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse63))) (let ((.cse61 (select .cse60 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse59 (select .cse61 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse62 (select .cse63 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse59 (select (select (store .cse60 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse61 .cse11 (+ .cse59 .cse62))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse62))))) 13)) .cse27) (forall ((v_ArrVal_500 Int)) (= (select (store .cse55 .cse1 v_ArrVal_500) .cse6) 13)) (= .cse44 4) (or .cse35 (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse68 (store (store .cse2 .cse26 v_ArrVal_492) .cse41 v_ArrVal_494))) (let ((.cse66 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse68))) (let ((.cse67 (select .cse66 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse64 (select .cse67 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse65 (select .cse68 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse64 .cse65 (select (select (store .cse66 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse67 .cse11 (+ .cse64 .cse65))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13)))))) 13))) (= (select .cse0 .cse11) 5) (or .cse43 (and .cse35 (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse73 (store (store (store .cse2 .cse15 (+ (select .cse2 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse74 (- 34359738368))) 4)) .cse17 v_ArrVal_492) .cse18 v_ArrVal_494))) (let ((.cse71 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse73))) (let ((.cse72 (select .cse71 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse69 (select .cse73 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse70 (select .cse72 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ .cse69 .cse70 (select (select (store .cse71 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse72 .cse11 (+ .cse69 .cse70))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13)))))) 13)))) (forall ((v_ArrVal_500 Int)) (= (select (store .cse0 .cse4 v_ArrVal_500) .cse6) 13)) (= 0 |c_ULTIMATE.start_main_~b~0#1.offset|) (= (select .cse0 |c_ULTIMATE.start_main_~b~0#1.offset|) 1) (or (and (or .cse7 (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse79 (store (store .cse2 .cse15 v_ArrVal_492) .cse17 v_ArrVal_494))) (let ((.cse76 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse79))) (let ((.cse77 (select .cse76 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse75 (select .cse77 |c_ULTIMATE.start_main_~b~0#1.offset|)) (.cse78 (select .cse79 |c_ULTIMATE.start_main_~a~0#1.offset|))) (+ .cse75 (select (select (store .cse76 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse77 .cse11 (+ .cse75 .cse78))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse78))))) 13))) (or (forall ((v_ArrVal_494 Int) (v_ArrVal_492 Int)) (= (let ((.cse84 (store (store .cse2 .cse3 v_ArrVal_492) .cse17 v_ArrVal_494))) (let ((.cse80 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse84))) (let ((.cse81 (select .cse80 |c_ULTIMATE.start_main_~b~0#1.base|))) (let ((.cse82 (select .cse84 |c_ULTIMATE.start_main_~a~0#1.offset|)) (.cse83 (select .cse81 |c_ULTIMATE.start_main_~b~0#1.offset|))) (+ (select (select (store .cse80 |c_ULTIMATE.start_main_~b~0#1.base| (store .cse81 .cse11 (+ .cse82 .cse83))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse13) .cse82 .cse83))))) 13)) .cse19)) .cse28)))))) is different from true [2023-02-16 00:22:47,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:22:49,470 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:23:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:23:03,288 INFO L93 Difference]: Finished difference Result 137 states and 152 transitions. [2023-02-16 00:23:03,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-16 00:23:03,288 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 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 [2023-02-16 00:23:03,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:23:03,289 INFO L225 Difference]: With dead ends: 137 [2023-02-16 00:23:03,289 INFO L226 Difference]: Without dead ends: 135 [2023-02-16 00:23:03,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 918 ImplicationChecksByTransitivity, 84.9s TimeCoverageRelationStatistics Valid=497, Invalid=2919, Unknown=10, NotChecked=114, Total=3540 [2023-02-16 00:23:03,291 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 158 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-02-16 00:23:03,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 248 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 529 Invalid, 0 Unknown, 2 Unchecked, 10.3s Time] [2023-02-16 00:23:03,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-16 00:23:03,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 75. [2023-02-16 00:23:03,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 74 states have internal predecessors, (89), 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) [2023-02-16 00:23:03,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 89 transitions. [2023-02-16 00:23:03,312 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 89 transitions. Word has length 32 [2023-02-16 00:23:03,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:23:03,313 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 89 transitions. [2023-02-16 00:23:03,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 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) [2023-02-16 00:23:03,313 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 89 transitions. [2023-02-16 00:23:03,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-16 00:23:03,314 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:23:03,314 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:23:03,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 00:23:03,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 00:23:03,516 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:23:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:23:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash 480713034, now seen corresponding path program 5 times [2023-02-16 00:23:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:23:03,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8606856] [2023-02-16 00:23:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:23:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:23:03,547 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 00:23:03,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1596861946] [2023-02-16 00:23:03,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 00:23:03,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:23:03,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:23:03,552 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 00:23:03,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process