./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/ifeqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/ifeqn4.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 b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 21:09:00,353 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 21:09:00,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 21:09:00,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 21:09:00,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 21:09:00,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 21:09:00,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 21:09:00,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 21:09:00,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 21:09:00,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 21:09:00,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 21:09:00,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 21:09:00,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 21:09:00,391 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 21:09:00,392 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 21:09:00,393 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 21:09:00,394 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 21:09:00,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 21:09:00,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 21:09:00,398 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 21:09:00,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 21:09:00,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 21:09:00,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 21:09:00,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 21:09:00,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 21:09:00,405 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 21:09:00,405 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 21:09:00,406 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 21:09:00,406 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 21:09:00,407 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 21:09:00,407 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 21:09:00,408 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 21:09:00,409 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 21:09:00,409 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 21:09:00,410 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 21:09:00,410 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 21:09:00,411 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 21:09:00,411 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 21:09:00,412 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 21:09:00,412 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 21:09:00,413 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 21:09:00,414 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 21:09:00,436 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 21:09:00,436 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 21:09:00,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 21:09:00,437 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 21:09:00,445 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 21:09:00,445 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 21:09:00,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 21:09:00,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 21:09:00,446 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 21:09:00,446 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 21:09:00,446 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 21:09:00,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 21:09:00,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 21:09:00,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 21:09:00,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 21:09:00,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 21:09:00,448 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 21:09:00,448 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 21:09:00,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 21:09:00,448 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 21:09:00,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 21:09:00,449 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 21:09:00,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 21:09:00,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 21:09:00,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 21:09:00,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 21:09:00,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 21:09:00,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 21:09:00,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 21:09:00,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 21:09:00,450 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 21:09:00,450 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 21:09:00,451 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 21:09:00,451 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 21:09:00,451 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 21:09:00,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b0db5597ff96f0e5a728327333d32dd7df56f4b1fb643f99ebf0f69cacecd717 [2023-02-17 21:09:00,632 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 21:09:00,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 21:09:00,651 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 21:09:00,652 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 21:09:00,652 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 21:09:00,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/ifeqn4.c [2023-02-17 21:09:01,826 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 21:09:02,031 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 21:09:02,032 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/ifeqn4.c [2023-02-17 21:09:02,037 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5521b8a8/bdcada4cd4734d6595832f5d685c8ca5/FLAG3e135d55c [2023-02-17 21:09:02,048 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5521b8a8/bdcada4cd4734d6595832f5d685c8ca5 [2023-02-17 21:09:02,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 21:09:02,052 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 21:09:02,053 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 21:09:02,053 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 21:09:02,056 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 21:09:02,056 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,057 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bcf8d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02, skipping insertion in model container [2023-02-17 21:09:02,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,063 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 21:09:02,074 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 21:09:02,176 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/ifeqn4.c[589,602] [2023-02-17 21:09:02,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 21:09:02,199 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 21:09:02,209 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/ifeqn4.c[589,602] [2023-02-17 21:09:02,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 21:09:02,225 INFO L208 MainTranslator]: Completed translation [2023-02-17 21:09:02,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02 WrapperNode [2023-02-17 21:09:02,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 21:09:02,226 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 21:09:02,226 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 21:09:02,226 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 21:09:02,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,236 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,252 INFO L138 Inliner]: procedures = 16, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2023-02-17 21:09:02,252 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 21:09:02,253 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 21:09:02,253 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 21:09:02,253 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 21:09:02,261 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,271 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,272 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,273 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 21:09:02,274 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 21:09:02,274 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 21:09:02,274 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 21:09:02,275 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (1/1) ... [2023-02-17 21:09:02,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 21:09:02,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:02,302 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) [2023-02-17 21:09:02,313 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 [2023-02-17 21:09:02,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 21:09:02,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 21:09:02,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 21:09:02,338 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 21:09:02,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 21:09:02,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 21:09:02,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 21:09:02,392 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 21:09:02,394 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 21:09:02,518 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 21:09:02,523 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 21:09:02,524 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 21:09:02,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:09:02 BoogieIcfgContainer [2023-02-17 21:09:02,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 21:09:02,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 21:09:02,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 21:09:02,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 21:09:02,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 09:09:02" (1/3) ... [2023-02-17 21:09:02,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573df59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:09:02, skipping insertion in model container [2023-02-17 21:09:02,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 09:09:02" (2/3) ... [2023-02-17 21:09:02,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@573df59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 09:09:02, skipping insertion in model container [2023-02-17 21:09:02,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 09:09:02" (3/3) ... [2023-02-17 21:09:02,534 INFO L112 eAbstractionObserver]: Analyzing ICFG ifeqn4.c [2023-02-17 21:09:02,570 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 21:09:02,582 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 21:09:02,646 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 21:09:02,661 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;@2df8e410, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 21:09:02,661 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 21:09:02,665 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) [2023-02-17 21:09:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 21:09:02,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:02,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:02,675 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:02,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1670316217, now seen corresponding path program 1 times [2023-02-17 21:09:02,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:02,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297032801] [2023-02-17 21:09:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:02,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:02,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:02,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297032801] [2023-02-17 21:09:02,789 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 21:09:02,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158703503] [2023-02-17 21:09:02,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:02,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:02,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:02,793 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) [2023-02-17 21:09:02,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 21:09:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:02,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 21:09:02,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:09:02,931 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 21:09:02,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158703503] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 21:09:02,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 21:09:02,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 21:09:02,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339254670] [2023-02-17 21:09:02,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 21:09:02,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 21:09:02,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 21:09:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 21:09:02,962 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 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) 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) [2023-02-17 21:09:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:02,974 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2023-02-17 21:09:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 21:09:02,976 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 [2023-02-17 21:09:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:02,981 INFO L225 Difference]: With dead ends: 42 [2023-02-17 21:09:02,981 INFO L226 Difference]: Without dead ends: 19 [2023-02-17 21:09:02,983 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 [2023-02-17 21:09:02,986 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2023-02-17 21:09:02,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 21:09:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-17 21:09:03,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-17 21:09:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 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) [2023-02-17 21:09:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2023-02-17 21:09:03,009 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 12 [2023-02-17 21:09:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:03,009 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2023-02-17 21:09:03,009 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) [2023-02-17 21:09:03,010 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2023-02-17 21:09:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 21:09:03,010 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:03,010 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:03,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:03,216 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 [2023-02-17 21:09:03,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1000416578, now seen corresponding path program 1 times [2023-02-17 21:09:03,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:03,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823477757] [2023-02-17 21:09:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:03,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:03,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:03,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823477757] [2023-02-17 21:09:03,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 21:09:03,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563778430] [2023-02-17 21:09:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:03,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:03,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:03,281 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) [2023-02-17 21:09:03,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 21:09:03,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:03,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 21:09:03,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:09:03,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 21:09:03,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563778430] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 21:09:03,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 21:09:03,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 21:09:03,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416110951] [2023-02-17 21:09:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 21:09:03,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 21:09:03,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:03,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 21:09:03,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 21:09:03,406 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2023-02-17 21:09:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:03,474 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-17 21:09:03,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 21:09:03,479 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 [2023-02-17 21:09:03,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:03,480 INFO L225 Difference]: With dead ends: 42 [2023-02-17 21:09:03,480 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 21:09:03,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 21:09:03,482 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 21:09:03,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 21:09:03,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 21:09:03,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 21. [2023-02-17 21:09:03,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:09:03,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-17 21:09:03,493 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2023-02-17 21:09:03,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:03,494 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-17 21:09:03,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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) [2023-02-17 21:09:03,494 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-17 21:09:03,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 21:09:03,495 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:03,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:03,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:03,695 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 [2023-02-17 21:09:03,696 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1992201947, now seen corresponding path program 1 times [2023-02-17 21:09:03,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698718698] [2023-02-17 21:09:03,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:03,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:03,743 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:09:03,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764986106] [2023-02-17 21:09:03,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:03,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:03,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:03,763 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) [2023-02-17 21:09:03,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 21:09:03,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:03,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 21:09:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:03,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 21:09:03,884 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 21:09:03,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 23 [2023-02-17 21:09:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 21:09:03,901 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 21:09:03,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698718698] [2023-02-17 21:09:03,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:09:03,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764986106] [2023-02-17 21:09:03,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764986106] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 21:09:03,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 21:09:03,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 21:09:03,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592657157] [2023-02-17 21:09:03,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 21:09:03,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 21:09:03,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:03,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 21:09:03,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 21:09:03,905 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:09:03,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:03,964 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-02-17 21:09:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 21:09:03,965 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-17 21:09:03,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:03,965 INFO L225 Difference]: With dead ends: 38 [2023-02-17 21:09:03,966 INFO L226 Difference]: Without dead ends: 36 [2023-02-17 21:09:03,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-17 21:09:03,967 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 21:09:03,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 21:09:03,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-17 21:09:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 26. [2023-02-17 21:09:03,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 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) [2023-02-17 21:09:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-17 21:09:03,972 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 18 [2023-02-17 21:09:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:03,973 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-17 21:09:03,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:09:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-17 21:09:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 21:09:03,974 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:03,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:03,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:04,180 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 [2023-02-17 21:09:04,180 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:04,181 INFO L85 PathProgramCache]: Analyzing trace with hash -217194585, now seen corresponding path program 1 times [2023-02-17 21:09:04,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:04,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313076158] [2023-02-17 21:09:04,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:04,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:04,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:04,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313076158] [2023-02-17 21:09:04,245 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 21:09:04,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372585574] [2023-02-17 21:09:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:04,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:04,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:04,255 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) [2023-02-17 21:09:04,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 21:09:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:04,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 21:09:04,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:04,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 21:09:04,332 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 21:09:04,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372585574] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 21:09:04,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 21:09:04,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 21:09:04,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055430667] [2023-02-17 21:09:04,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 21:09:04,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 21:09:04,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:04,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 21:09:04,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 21:09:04,335 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:09:04,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:04,384 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-17 21:09:04,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 21:09:04,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2023-02-17 21:09:04,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:04,391 INFO L225 Difference]: With dead ends: 55 [2023-02-17 21:09:04,391 INFO L226 Difference]: Without dead ends: 35 [2023-02-17 21:09:04,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 21:09:04,394 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 21:09:04,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 22 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 21:09:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-17 21:09:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2023-02-17 21:09:04,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 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) [2023-02-17 21:09:04,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-02-17 21:09:04,405 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 18 [2023-02-17 21:09:04,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:04,406 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-02-17 21:09:04,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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) [2023-02-17 21:09:04,407 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-02-17 21:09:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 21:09:04,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:04,408 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:04,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:04,613 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 [2023-02-17 21:09:04,613 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:04,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:04,614 INFO L85 PathProgramCache]: Analyzing trace with hash 259417010, now seen corresponding path program 1 times [2023-02-17 21:09:04,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:04,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677517798] [2023-02-17 21:09:04,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:04,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:04,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:09:04,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [539606681] [2023-02-17 21:09:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:04,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:04,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:04,657 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) [2023-02-17 21:09:04,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 21:09:04,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:04,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 21:09:04,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:04,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:09:04,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:09:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:09:04,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:04,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677517798] [2023-02-17 21:09:04,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:09:04,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539606681] [2023-02-17 21:09:04,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539606681] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:09:04,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:09:04,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-17 21:09:04,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866349022] [2023-02-17 21:09:04,785 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:09:04,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 21:09:04,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:04,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 21:09:04,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 21:09:04,787 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2023-02-17 21:09:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:04,904 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2023-02-17 21:09:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 21:09:04,905 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) Word has length 21 [2023-02-17 21:09:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:04,907 INFO L225 Difference]: With dead ends: 70 [2023-02-17 21:09:04,907 INFO L226 Difference]: Without dead ends: 43 [2023-02-17 21:09:04,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-17 21:09:04,909 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 21:09:04,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 43 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 21:09:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-17 21:09:04,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 27. [2023-02-17 21:09:04,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 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) [2023-02-17 21:09:04,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-02-17 21:09:04,918 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 21 [2023-02-17 21:09:04,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:04,918 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-02-17 21:09:04,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2023-02-17 21:09:04,918 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-02-17 21:09:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 21:09:04,919 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:04,919 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:04,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:05,128 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 [2023-02-17 21:09:05,128 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:05,129 INFO L85 PathProgramCache]: Analyzing trace with hash 939318754, now seen corresponding path program 1 times [2023-02-17 21:09:05,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:05,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003626015] [2023-02-17 21:09:05,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:05,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:05,166 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:09:05,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912210316] [2023-02-17 21:09:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:05,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:05,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:05,168 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) [2023-02-17 21:09:05,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 21:09:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:05,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 21:09:05,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:05,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 21:09:05,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 43 [2023-02-17 21:09:05,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:05,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:05,312 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 42 treesize of output 87 [2023-02-17 21:09:05,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:05,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:05,348 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 64 treesize of output 22 [2023-02-17 21:09:05,376 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 21:09:05,377 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 42 treesize of output 23 [2023-02-17 21:09:05,389 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:09:05,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:09:05,543 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 35 treesize of output 33 [2023-02-17 21:09:05,549 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 37 treesize of output 35 [2023-02-17 21:09:05,553 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:05,555 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 21:09:05,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:05,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003626015] [2023-02-17 21:09:05,574 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:09:05,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912210316] [2023-02-17 21:09:05,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912210316] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:09:05,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:09:05,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2023-02-17 21:09:05,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448136751] [2023-02-17 21:09:05,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:09:05,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 21:09:05,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:05,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 21:09:05,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-17 21:09:05,577 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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) [2023-02-17 21:09:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:06,001 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2023-02-17 21:09:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 21:09:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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 [2023-02-17 21:09:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:06,003 INFO L225 Difference]: With dead ends: 112 [2023-02-17 21:09:06,003 INFO L226 Difference]: Without dead ends: 92 [2023-02-17 21:09:06,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-02-17 21:09:06,004 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 179 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 21:09:06,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 85 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 21:09:06,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-17 21:09:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2023-02-17 21:09:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 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) [2023-02-17 21:09:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-02-17 21:09:06,014 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 24 [2023-02-17 21:09:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:06,014 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-02-17 21:09:06,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 15 states have internal predecessors, (41), 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) [2023-02-17 21:09:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-02-17 21:09:06,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 21:09:06,015 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:06,015 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:06,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:06,227 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 [2023-02-17 21:09:06,228 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:06,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:06,228 INFO L85 PathProgramCache]: Analyzing trace with hash 430403928, now seen corresponding path program 1 times [2023-02-17 21:09:06,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:06,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281195745] [2023-02-17 21:09:06,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:06,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:06,246 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:09:06,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [547246754] [2023-02-17 21:09:06,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:06,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:06,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:06,248 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) [2023-02-17 21:09:06,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 21:09:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 21:09:06,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-17 21:09:06,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:06,370 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 [2023-02-17 21:09:06,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 21:09:06,398 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 50 treesize of output 43 [2023-02-17 21:09:06,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:06,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:06,404 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 42 treesize of output 87 [2023-02-17 21:09:06,415 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 21:09:06,433 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 19 treesize of output 18 [2023-02-17 21:09:06,458 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 113 treesize of output 101 [2023-02-17 21:09:06,464 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 21:09:06,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:06,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:06,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:06,470 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 94 treesize of output 147 [2023-02-17 21:09:06,482 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 21:09:06,607 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 21:09:06,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 132 treesize of output 105 [2023-02-17 21:09:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:09:06,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:09:07,579 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,582 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,585 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,589 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,593 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,597 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,599 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,600 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 21:09:07,613 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,616 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,633 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,635 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-02-17 21:09:07,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 21:09:07,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:07,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281195745] [2023-02-17 21:09:07,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:09:07,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547246754] [2023-02-17 21:09:07,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547246754] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:09:07,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:09:07,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2023-02-17 21:09:07,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828026239] [2023-02-17 21:09:07,722 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:09:07,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 21:09:07,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:07,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 21:09:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-02-17 21:09:07,724 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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) [2023-02-17 21:09:16,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:16,953 INFO L93 Difference]: Finished difference Result 175 states and 197 transitions. [2023-02-17 21:09:16,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-17 21:09:16,954 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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 [2023-02-17 21:09:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:16,957 INFO L225 Difference]: With dead ends: 175 [2023-02-17 21:09:16,958 INFO L226 Difference]: Without dead ends: 173 [2023-02-17 21:09:16,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=683, Invalid=2287, Unknown=0, NotChecked=0, Total=2970 [2023-02-17 21:09:16,961 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 395 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-02-17 21:09:16,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 199 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-02-17 21:09:16,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-17 21:09:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2023-02-17 21:09:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.2784810126582278) internal successors, (101), 79 states have internal predecessors, (101), 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) [2023-02-17 21:09:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2023-02-17 21:09:16,999 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 28 [2023-02-17 21:09:16,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:16,999 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2023-02-17 21:09:16,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 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) [2023-02-17 21:09:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2023-02-17 21:09:17,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-17 21:09:17,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:17,002 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:17,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:17,209 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 [2023-02-17 21:09:17,209 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:17,209 INFO L85 PathProgramCache]: Analyzing trace with hash 877615566, now seen corresponding path program 2 times [2023-02-17 21:09:17,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:17,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195709737] [2023-02-17 21:09:17,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:17,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:17,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:09:17,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327890549] [2023-02-17 21:09:17,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 21:09:17,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:17,229 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) [2023-02-17 21:09:17,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 21:09:17,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 21:09:17,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 21:09:17,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 21:09:17,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:17,318 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 21:09:17,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:09:17,346 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 21:09:17,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:17,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195709737] [2023-02-17 21:09:17,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:09:17,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327890549] [2023-02-17 21:09:17,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327890549] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:09:17,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:09:17,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-02-17 21:09:17,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974878956] [2023-02-17 21:09:17,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:09:17,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 21:09:17,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 21:09:17,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-02-17 21:09:17,349 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:09:17,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:17,541 INFO L93 Difference]: Finished difference Result 190 states and 228 transitions. [2023-02-17 21:09:17,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 21:09:17,542 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-17 21:09:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:17,544 INFO L225 Difference]: With dead ends: 190 [2023-02-17 21:09:17,544 INFO L226 Difference]: Without dead ends: 122 [2023-02-17 21:09:17,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-02-17 21:09:17,546 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 49 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 21:09:17,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 65 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 21:09:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-17 21:09:17,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2023-02-17 21:09:17,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.21875) internal successors, (117), 96 states have internal predecessors, (117), 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) [2023-02-17 21:09:17,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 117 transitions. [2023-02-17 21:09:17,594 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 117 transitions. Word has length 32 [2023-02-17 21:09:17,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:17,594 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 117 transitions. [2023-02-17 21:09:17,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 21:09:17,594 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 117 transitions. [2023-02-17 21:09:17,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 21:09:17,595 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:17,595 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:17,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:17,797 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 [2023-02-17 21:09:17,797 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash -187195163, now seen corresponding path program 2 times [2023-02-17 21:09:17,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:17,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121680808] [2023-02-17 21:09:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:17,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:17,822 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:09:17,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817131225] [2023-02-17 21:09:17,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 21:09:17,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:17,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:17,824 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) [2023-02-17 21:09:17,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 21:09:17,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 21:09:17,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 21:09:17,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 21:09:17,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:17,941 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 21:09:17,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:09:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 21:09:17,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:17,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121680808] [2023-02-17 21:09:17,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:09:17,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817131225] [2023-02-17 21:09:17,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817131225] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:09:17,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:09:17,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2023-02-17 21:09:17,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772108421] [2023-02-17 21:09:17,987 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:09:17,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 21:09:17,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:17,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 21:09:17,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-02-17 21:09:17,988 INFO L87 Difference]: Start difference. First operand 97 states and 117 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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) [2023-02-17 21:09:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:18,291 INFO L93 Difference]: Finished difference Result 236 states and 273 transitions. [2023-02-17 21:09:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 21:09:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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 36 [2023-02-17 21:09:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:18,293 INFO L225 Difference]: With dead ends: 236 [2023-02-17 21:09:18,293 INFO L226 Difference]: Without dead ends: 177 [2023-02-17 21:09:18,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2023-02-17 21:09:18,297 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 134 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 21:09:18,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 100 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 21:09:18,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-17 21:09:18,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2023-02-17 21:09:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 133 states have internal predecessors, (158), 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) [2023-02-17 21:09:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2023-02-17 21:09:18,353 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 36 [2023-02-17 21:09:18,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:18,353 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2023-02-17 21:09:18,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 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) [2023-02-17 21:09:18,353 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2023-02-17 21:09:18,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 21:09:18,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:18,358 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:18,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:18,565 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 [2023-02-17 21:09:18,566 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:18,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1173959464, now seen corresponding path program 3 times [2023-02-17 21:09:18,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:18,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289090673] [2023-02-17 21:09:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:18,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:18,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:09:18,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890772710] [2023-02-17 21:09:18,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 21:09:18,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:18,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:18,610 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) [2023-02-17 21:09:18,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 21:09:18,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 21:09:18,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 21:09:18,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-17 21:09:18,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 21:09:18,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 21:09:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 21:09:18,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 21:09:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289090673] [2023-02-17 21:09:18,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 21:09:18,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890772710] [2023-02-17 21:09:18,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890772710] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 21:09:18,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 21:09:18,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2023-02-17 21:09:18,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719411382] [2023-02-17 21:09:18,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 21:09:18,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 21:09:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 21:09:18,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 21:09:18,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-02-17 21:09:18,890 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2023-02-17 21:09:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 21:09:19,314 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2023-02-17 21:09:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 21:09:19,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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 37 [2023-02-17 21:09:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 21:09:19,316 INFO L225 Difference]: With dead ends: 171 [2023-02-17 21:09:19,316 INFO L226 Difference]: Without dead ends: 162 [2023-02-17 21:09:19,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 54 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=1394, Unknown=0, NotChecked=0, Total=1806 [2023-02-17 21:09:19,317 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 119 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 21:09:19,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 95 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 21:09:19,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-17 21:09:19,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 134. [2023-02-17 21:09:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1729323308270676) internal successors, (156), 133 states have internal predecessors, (156), 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) [2023-02-17 21:09:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 156 transitions. [2023-02-17 21:09:19,363 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 156 transitions. Word has length 37 [2023-02-17 21:09:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 21:09:19,365 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 156 transitions. [2023-02-17 21:09:19,365 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 20 states have internal predecessors, (49), 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) [2023-02-17 21:09:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 156 transitions. [2023-02-17 21:09:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 21:09:19,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 21:09:19,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 21:09:19,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 21:09:19,574 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 [2023-02-17 21:09:19,575 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 21:09:19,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 21:09:19,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1129715953, now seen corresponding path program 4 times [2023-02-17 21:09:19,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 21:09:19,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265924979] [2023-02-17 21:09:19,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 21:09:19,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 21:09:19,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 21:09:19,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [229913596] [2023-02-17 21:09:19,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 21:09:19,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 21:09:19,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 21:09:19,613 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) [2023-02-17 21:09:19,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 21:09:19,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 21:09:19,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 21:09:19,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-17 21:09:19,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 21:09:19,854 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 [2023-02-17 21:09:19,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-17 21:09:19,878 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 112 treesize of output 101 [2023-02-17 21:09:19,881 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 21:09:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:19,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:19,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:19,885 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 100 treesize of output 177 [2023-02-17 21:09:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:19,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:19,898 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 208 treesize of output 97 [2023-02-17 21:09:19,945 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 225 treesize of output 196 [2023-02-17 21:09:19,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 230 [2023-02-17 21:09:19,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 84 [2023-02-17 21:09:20,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 16 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 422 treesize of output 242 [2023-02-17 21:09:20,152 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 548 treesize of output 482 [2023-02-17 21:09:20,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:20,161 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 21:09:20,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:20,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:20,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 21:09:20,166 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 126 treesize of output 203 [2023-02-17 21:09:20,173 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 21:09:20,305 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 603 treesize of output 523 [2023-02-17 21:09:20,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 15 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 236 [2023-02-17 21:09:20,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 187 treesize of output 102 [2023-02-17 21:09:27,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 21:09:27,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 582 select indices, 582 select index equivalence classes, 15 disjoint index pairs (out of 169071 index pairs), introduced 582 new quantified variables, introduced 169071 case distinctions, treesize of input 17221 treesize of output 242579