./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.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 cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:45:19,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:45:19,187 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:45:19,218 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:45:19,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:45:19,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:45:19,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:45:19,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:45:19,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:45:19,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:45:19,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:45:19,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:45:19,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:45:19,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:45:19,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:45:19,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:45:19,240 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:45:19,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:45:19,242 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:45:19,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:45:19,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:45:19,247 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:45:19,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:45:19,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:45:19,251 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:45:19,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:45:19,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:45:19,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:45:19,255 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:45:19,256 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:45:19,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:45:19,257 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:45:19,258 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:45:19,259 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:45:19,260 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:45:19,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:45:19,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:45:19,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:45:19,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:45:19,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:45:19,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:45:19,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:45:19,288 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:45:19,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:45:19,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:45:19,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:45:19,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:45:19,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:45:19,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:45:19,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:45:19,290 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:45:19,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:45:19,291 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:45:19,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:45:19,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:45:19,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:45:19,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:45:19,292 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:45:19,292 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:45:19,292 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:45:19,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:45:19,293 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:45:19,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:45:19,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:45:19,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:45:19,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:45:19,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:45:19,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:45:19,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:45:19,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:45:19,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:45:19,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:45:19,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:45:19,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:45:19,295 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:45:19,295 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:45:19,295 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:45:19,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb55eb0e5d7c4df3b95a55b83f19894edf68e79ccb0eab5e69a8aa23c994caed [2023-02-16 01:45:19,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:45:19,538 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:45:19,540 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:45:19,541 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:45:19,541 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:45:19,542 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2023-02-16 01:45:20,564 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:45:20,750 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:45:20,751 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_unwindbound50.c [2023-02-16 01:45:20,756 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d605fc5c/98f9c49becec41da8a56c39b8816f190/FLAG7b40e28c4 [2023-02-16 01:45:21,162 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d605fc5c/98f9c49becec41da8a56c39b8816f190 [2023-02-16 01:45:21,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:45:21,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:45:21,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:45:21,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:45:21,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:45:21,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e2f8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21, skipping insertion in model container [2023-02-16 01:45:21,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:45:21,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:45:21,269 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/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2023-02-16 01:45:21,282 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:45:21,288 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:45:21,296 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/nla-digbench-scaling/cohencu-ll_unwindbound50.c[588,601] [2023-02-16 01:45:21,302 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:45:21,311 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:45:21,312 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21 WrapperNode [2023-02-16 01:45:21,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:45:21,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:45:21,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:45:21,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:45:21,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,322 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,334 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2023-02-16 01:45:21,334 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:45:21,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:45:21,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:45:21,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:45:21,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,346 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,346 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:45:21,348 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:45:21,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:45:21,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:45:21,349 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (1/1) ... [2023-02-16 01:45:21,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:45:21,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:21,379 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-16 01:45:21,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-16 01:45:21,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:45:21,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:45:21,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:45:21,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:45:21,409 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-16 01:45:21,410 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-16 01:45:21,462 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:45:21,464 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:45:21,644 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:45:21,654 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:45:21,654 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-16 01:45:21,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:45:21 BoogieIcfgContainer [2023-02-16 01:45:21,657 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:45:21,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:45:21,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:45:21,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:45:21,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:45:21" (1/3) ... [2023-02-16 01:45:21,663 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8093f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:45:21, skipping insertion in model container [2023-02-16 01:45:21,663 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:45:21" (2/3) ... [2023-02-16 01:45:21,664 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c8093f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:45:21, skipping insertion in model container [2023-02-16 01:45:21,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:45:21" (3/3) ... [2023-02-16 01:45:21,667 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound50.c [2023-02-16 01:45:21,685 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:45:21,685 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:45:21,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:45:21,736 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;@718fa2ea, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:45:21,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:45:21,741 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-16 01:45:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-16 01:45:21,747 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:21,748 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:21,748 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:21,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:21,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2023-02-16 01:45:21,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:21,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323658571] [2023-02-16 01:45:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:21,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:21,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:21,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:21,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323658571] [2023-02-16 01:45:21,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323658571] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:45:21,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:45:21,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 01:45:21,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107356778] [2023-02-16 01:45:21,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:45:21,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 01:45:21,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 01:45:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:45:21,935 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:21,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:21,958 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2023-02-16 01:45:21,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 01:45:21,961 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-16 01:45:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:21,966 INFO L225 Difference]: With dead ends: 50 [2023-02-16 01:45:21,966 INFO L226 Difference]: Without dead ends: 22 [2023-02-16 01:45:21,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:45:21,973 INFO L413 NwaCegarLoop]: 37 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, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:21,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:45:21,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-16 01:45:22,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-16 01:45:22,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 01:45:22,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2023-02-16 01:45:22,015 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2023-02-16 01:45:22,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:22,016 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2023-02-16 01:45:22,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2023-02-16 01:45:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 01:45:22,017 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:22,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:22,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 01:45:22,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:22,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:22,020 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2023-02-16 01:45:22,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:22,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026788130] [2023-02-16 01:45:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:22,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:22,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:22,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:22,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026788130] [2023-02-16 01:45:22,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026788130] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:45:22,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:45:22,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-16 01:45:22,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126947114] [2023-02-16 01:45:22,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:45:22,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:45:22,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:22,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:45:22,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:45:22,154 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:22,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:22,186 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2023-02-16 01:45:22,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:45:22,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 01:45:22,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:22,187 INFO L225 Difference]: With dead ends: 36 [2023-02-16 01:45:22,187 INFO L226 Difference]: Without dead ends: 24 [2023-02-16 01:45:22,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:45:22,189 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:22,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:45:22,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-16 01:45:22,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-16 01:45:22,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 01:45:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2023-02-16 01:45:22,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2023-02-16 01:45:22,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:22,200 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2023-02-16 01:45:22,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:22,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2023-02-16 01:45:22,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-16 01:45:22,200 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:22,201 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:22,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 01:45:22,201 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2023-02-16 01:45:22,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:22,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869330075] [2023-02-16 01:45:22,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:22,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:22,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:22,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:22,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869330075] [2023-02-16 01:45:22,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869330075] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:45:22,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:45:22,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 01:45:22,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771271808] [2023-02-16 01:45:22,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:45:22,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:45:22,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:22,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:45:22,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:45:22,409 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:22,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:22,465 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-02-16 01:45:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:45:22,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-16 01:45:22,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:22,466 INFO L225 Difference]: With dead ends: 30 [2023-02-16 01:45:22,466 INFO L226 Difference]: Without dead ends: 28 [2023-02-16 01:45:22,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:45:22,468 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:22,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:45:22,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-16 01:45:22,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-16 01:45:22,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-16 01:45:22,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-02-16 01:45:22,483 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2023-02-16 01:45:22,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:22,483 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-02-16 01:45:22,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:45:22,484 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-02-16 01:45:22,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 01:45:22,484 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:22,484 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:22,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 01:45:22,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:22,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2023-02-16 01:45:22,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:22,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421491532] [2023-02-16 01:45:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:22,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:22,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118481902] [2023-02-16 01:45:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:22,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:22,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:22,524 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:22,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 01:45:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:22,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 01:45:22,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:22,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:22,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:45:22,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421491532] [2023-02-16 01:45:22,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:22,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118481902] [2023-02-16 01:45:22,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118481902] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:22,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:22,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 01:45:22,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080699144] [2023-02-16 01:45:22,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:22,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:22,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:22,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:22,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:45:22,876 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:45:23,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:23,207 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2023-02-16 01:45:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 01:45:23,208 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-02-16 01:45:23,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:23,209 INFO L225 Difference]: With dead ends: 54 [2023-02-16 01:45:23,209 INFO L226 Difference]: Without dead ends: 52 [2023-02-16 01:45:23,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:23,210 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 20 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:23,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 71 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:45:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-16 01:45:23,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2023-02-16 01:45:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-16 01:45:23,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 66 transitions. [2023-02-16 01:45:23,229 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 66 transitions. Word has length 13 [2023-02-16 01:45:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:23,229 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 66 transitions. [2023-02-16 01:45:23,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-16 01:45:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 66 transitions. [2023-02-16 01:45:23,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 01:45:23,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:23,231 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:23,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:23,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:23,437 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:23,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:23,437 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2023-02-16 01:45:23,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:23,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480641648] [2023-02-16 01:45:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:23,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:23,451 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:23,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165533777] [2023-02-16 01:45:23,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:23,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:23,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:23,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:23,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 01:45:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:23,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-16 01:45:23,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:23,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:45:23,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:45:23,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:23,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480641648] [2023-02-16 01:45:23,786 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:23,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165533777] [2023-02-16 01:45:23,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165533777] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:23,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:23,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 01:45:23,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709265537] [2023-02-16 01:45:23,787 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:23,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:23,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:23,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:23,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:45:23,793 INFO L87 Difference]: Start difference. First operand 47 states and 66 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 01:45:24,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:24,065 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2023-02-16 01:45:24,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:45:24,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-02-16 01:45:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:24,067 INFO L225 Difference]: With dead ends: 60 [2023-02-16 01:45:24,067 INFO L226 Difference]: Without dead ends: 58 [2023-02-16 01:45:24,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:24,068 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:24,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:45:24,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-16 01:45:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2023-02-16 01:45:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 states have internal predecessors, (28), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-16 01:45:24,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2023-02-16 01:45:24,089 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 18 [2023-02-16 01:45:24,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:24,090 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2023-02-16 01:45:24,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-16 01:45:24,090 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2023-02-16 01:45:24,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 01:45:24,090 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:24,091 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:24,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:24,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:24,296 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:24,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:24,297 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2023-02-16 01:45:24,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:24,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769515569] [2023-02-16 01:45:24,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:24,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:24,305 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:24,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422831294] [2023-02-16 01:45:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:24,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:24,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:24,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:24,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 01:45:24,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:24,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 01:45:24,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:45:24,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:24,711 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:45:24,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:24,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769515569] [2023-02-16 01:45:24,712 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:24,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422831294] [2023-02-16 01:45:24,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422831294] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:24,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:24,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 01:45:24,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538150381] [2023-02-16 01:45:24,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:24,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:24,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:24,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:24,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:45:24,714 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 01:45:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:26,269 INFO L93 Difference]: Finished difference Result 74 states and 100 transitions. [2023-02-16 01:45:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:45:26,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 23 [2023-02-16 01:45:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:26,271 INFO L225 Difference]: With dead ends: 74 [2023-02-16 01:45:26,271 INFO L226 Difference]: Without dead ends: 65 [2023-02-16 01:45:26,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:26,272 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 23 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:26,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 60 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-16 01:45:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-16 01:45:26,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-16 01:45:26,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-16 01:45:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 84 transitions. [2023-02-16 01:45:26,291 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 84 transitions. Word has length 23 [2023-02-16 01:45:26,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:26,292 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 84 transitions. [2023-02-16 01:45:26,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-16 01:45:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 84 transitions. [2023-02-16 01:45:26,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-16 01:45:26,293 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:26,293 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:26,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-16 01:45:26,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:26,514 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:26,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2023-02-16 01:45:26,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:26,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824600847] [2023-02-16 01:45:26,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:26,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:26,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:26,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1553243952] [2023-02-16 01:45:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:26,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:26,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:26,541 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:26,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 01:45:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:26,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-16 01:45:26,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:26,647 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-02-16 01:45:26,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:26,700 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-16 01:45:26,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:26,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824600847] [2023-02-16 01:45:26,700 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:26,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553243952] [2023-02-16 01:45:26,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553243952] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:26,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:26,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-16 01:45:26,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372199950] [2023-02-16 01:45:26,700 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:26,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 01:45:26,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:26,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 01:45:26,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:45:26,701 INFO L87 Difference]: Start difference. First operand 65 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 01:45:26,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:26,818 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2023-02-16 01:45:26,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 01:45:26,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2023-02-16 01:45:26,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:26,820 INFO L225 Difference]: With dead ends: 140 [2023-02-16 01:45:26,820 INFO L226 Difference]: Without dead ends: 119 [2023-02-16 01:45:26,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:45:26,821 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 53 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:26,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:45:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-16 01:45:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2023-02-16 01:45:26,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 41 states have call successors, (41), 14 states have call predecessors, (41), 14 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-16 01:45:26,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 144 transitions. [2023-02-16 01:45:26,842 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 144 transitions. Word has length 41 [2023-02-16 01:45:26,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:26,843 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 144 transitions. [2023-02-16 01:45:26,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-16 01:45:26,843 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 144 transitions. [2023-02-16 01:45:26,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 01:45:26,844 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:26,844 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:26,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:27,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:27,050 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:27,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:27,050 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 1 times [2023-02-16 01:45:27,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:27,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462522163] [2023-02-16 01:45:27,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:27,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:27,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:27,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361267824] [2023-02-16 01:45:27,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:27,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:27,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:27,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:27,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 01:45:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:27,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:45:27,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 01:45:27,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:27,318 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-16 01:45:27,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462522163] [2023-02-16 01:45:27,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:27,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361267824] [2023-02-16 01:45:27,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361267824] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:27,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:27,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-16 01:45:27,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233342378] [2023-02-16 01:45:27,319 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:27,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:45:27,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:27,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:45:27,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:27,320 INFO L87 Difference]: Start difference. First operand 115 states and 144 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-16 01:45:29,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:45:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:29,900 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2023-02-16 01:45:29,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 01:45:29,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 46 [2023-02-16 01:45:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:29,901 INFO L225 Difference]: With dead ends: 129 [2023-02-16 01:45:29,901 INFO L226 Difference]: Without dead ends: 127 [2023-02-16 01:45:29,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-02-16 01:45:29,902 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 56 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:29,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 98 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 480 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-02-16 01:45:29,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-16 01:45:29,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-02-16 01:45:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 68 states have (on average 1.1029411764705883) internal successors, (75), 72 states have internal predecessors, (75), 41 states have call successors, (41), 17 states have call predecessors, (41), 17 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-16 01:45:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 153 transitions. [2023-02-16 01:45:29,923 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 153 transitions. Word has length 46 [2023-02-16 01:45:29,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:29,924 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 153 transitions. [2023-02-16 01:45:29,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-02-16 01:45:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 153 transitions. [2023-02-16 01:45:29,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-16 01:45:29,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:29,925 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:29,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:30,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:30,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:30,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1316290887, now seen corresponding path program 2 times [2023-02-16 01:45:30,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:30,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102224486] [2023-02-16 01:45:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:30,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:30,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:30,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614771665] [2023-02-16 01:45:30,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:45:30,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:30,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:30,144 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:30,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 01:45:30,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:45:30,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:30,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:45:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 17 proven. 32 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-16 01:45:30,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:30,402 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-02-16 01:45:30,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102224486] [2023-02-16 01:45:30,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:30,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614771665] [2023-02-16 01:45:30,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614771665] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:30,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:30,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-16 01:45:30,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439898759] [2023-02-16 01:45:30,403 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:30,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:30,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:30,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:30,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:45:30,404 INFO L87 Difference]: Start difference. First operand 127 states and 153 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-16 01:45:31,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:31,064 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2023-02-16 01:45:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 01:45:31,064 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 56 [2023-02-16 01:45:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:31,065 INFO L225 Difference]: With dead ends: 141 [2023-02-16 01:45:31,065 INFO L226 Difference]: Without dead ends: 135 [2023-02-16 01:45:31,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:31,066 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:31,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 94 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 01:45:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-16 01:45:31,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-02-16 01:45:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 81 states have internal predecessors, (84), 37 states have call successors, (37), 20 states have call predecessors, (37), 20 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-16 01:45:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 154 transitions. [2023-02-16 01:45:31,094 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 154 transitions. Word has length 56 [2023-02-16 01:45:31,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:31,094 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 154 transitions. [2023-02-16 01:45:31,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-02-16 01:45:31,096 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 154 transitions. [2023-02-16 01:45:31,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-16 01:45:31,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:31,098 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:31,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:31,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:31,304 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:31,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:31,304 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2023-02-16 01:45:31,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:31,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237828354] [2023-02-16 01:45:31,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:31,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:31,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:31,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978549961] [2023-02-16 01:45:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:31,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:31,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:31,325 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:31,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 01:45:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 01:45:31,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 21 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-16 01:45:31,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 24 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-16 01:45:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:32,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237828354] [2023-02-16 01:45:32,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:32,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978549961] [2023-02-16 01:45:32,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978549961] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:32,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:32,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-02-16 01:45:32,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236519857] [2023-02-16 01:45:32,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:32,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:45:32,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:32,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:45:32,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:32,043 INFO L87 Difference]: Start difference. First operand 135 states and 154 transitions. Second operand has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-16 01:45:32,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:32,784 INFO L93 Difference]: Finished difference Result 149 states and 167 transitions. [2023-02-16 01:45:32,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 01:45:32,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 67 [2023-02-16 01:45:32,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:32,786 INFO L225 Difference]: With dead ends: 149 [2023-02-16 01:45:32,786 INFO L226 Difference]: Without dead ends: 145 [2023-02-16 01:45:32,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:45:32,787 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:32,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 84 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 01:45:32,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-16 01:45:32,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-02-16 01:45:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 88 states have internal predecessors, (91), 37 states have call successors, (37), 23 states have call predecessors, (37), 22 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-16 01:45:32,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2023-02-16 01:45:32,822 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 67 [2023-02-16 01:45:32,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:32,823 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2023-02-16 01:45:32,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-02-16 01:45:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2023-02-16 01:45:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-16 01:45:32,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:32,828 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:32,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:33,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:33,034 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:33,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:33,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1808123650, now seen corresponding path program 1 times [2023-02-16 01:45:33,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:33,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402145026] [2023-02-16 01:45:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:33,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:33,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:33,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495800358] [2023-02-16 01:45:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:33,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:33,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:33,044 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:33,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 01:45:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:33,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 01:45:33,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:33,527 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-16 01:45:33,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-16 01:45:33,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:33,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402145026] [2023-02-16 01:45:33,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:33,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495800358] [2023-02-16 01:45:33,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495800358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:33,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:33,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-16 01:45:33,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920906629] [2023-02-16 01:45:33,809 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:33,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 01:45:33,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:33,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 01:45:33,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:45:33,811 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-02-16 01:45:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:34,967 INFO L93 Difference]: Finished difference Result 164 states and 188 transitions. [2023-02-16 01:45:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-16 01:45:34,967 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 72 [2023-02-16 01:45:34,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:34,968 INFO L225 Difference]: With dead ends: 164 [2023-02-16 01:45:34,968 INFO L226 Difference]: Without dead ends: 153 [2023-02-16 01:45:34,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-02-16 01:45:34,969 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 18 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:34,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 101 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-16 01:45:34,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-16 01:45:35,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-02-16 01:45:35,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 87 states have (on average 1.0689655172413792) internal successors, (93), 91 states have internal predecessors, (93), 42 states have call successors, (42), 23 states have call predecessors, (42), 23 states have return successors, (39), 38 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-16 01:45:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2023-02-16 01:45:35,017 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 72 [2023-02-16 01:45:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:35,017 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2023-02-16 01:45:35,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-02-16 01:45:35,018 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2023-02-16 01:45:35,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-16 01:45:35,018 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:35,018 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1] [2023-02-16 01:45:35,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-16 01:45:35,223 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,SelfDestructingSolverStorable10 [2023-02-16 01:45:35,224 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:35,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:35,224 INFO L85 PathProgramCache]: Analyzing trace with hash 514910066, now seen corresponding path program 3 times [2023-02-16 01:45:35,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:35,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354861998] [2023-02-16 01:45:35,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:35,230 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:35,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97135051] [2023-02-16 01:45:35,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:45:35,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:35,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:35,232 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:35,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 01:45:35,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 01:45:35,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:35,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 01:45:35,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 01:45:35,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 55 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-16 01:45:36,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:36,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354861998] [2023-02-16 01:45:36,159 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:36,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97135051] [2023-02-16 01:45:36,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97135051] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:36,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:36,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-16 01:45:36,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370165305] [2023-02-16 01:45:36,160 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:36,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 01:45:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 01:45:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:45:36,161 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-16 01:45:39,377 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:45:41,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:41,978 INFO L93 Difference]: Finished difference Result 159 states and 179 transitions. [2023-02-16 01:45:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 01:45:41,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 79 [2023-02-16 01:45:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:41,980 INFO L225 Difference]: With dead ends: 159 [2023-02-16 01:45:41,980 INFO L226 Difference]: Without dead ends: 143 [2023-02-16 01:45:41,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:45:41,980 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:41,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 96 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 423 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-02-16 01:45:41,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2023-02-16 01:45:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 141. [2023-02-16 01:45:42,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 87 states have internal predecessors, (88), 34 states have call successors, (34), 22 states have call predecessors, (34), 22 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-16 01:45:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 155 transitions. [2023-02-16 01:45:42,015 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 155 transitions. Word has length 79 [2023-02-16 01:45:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:42,016 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 155 transitions. [2023-02-16 01:45:42,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-16 01:45:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 155 transitions. [2023-02-16 01:45:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-16 01:45:42,021 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:42,021 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:42,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:42,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:42,229 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:42,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:42,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2023-02-16 01:45:42,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:42,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262164274] [2023-02-16 01:45:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:42,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:42,247 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:42,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [606299107] [2023-02-16 01:45:42,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:45:42,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:42,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:42,249 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:42,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 01:45:42,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:45:42,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 01:45:42,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2023-02-16 01:45:42,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:42,607 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2023-02-16 01:45:42,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:42,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262164274] [2023-02-16 01:45:42,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:42,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606299107] [2023-02-16 01:45:42,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606299107] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:42,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:42,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-16 01:45:42,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020292275] [2023-02-16 01:45:42,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:42,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:45:42,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:42,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:45:42,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:45:42,610 INFO L87 Difference]: Start difference. First operand 141 states and 155 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-02-16 01:45:42,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:42,977 INFO L93 Difference]: Finished difference Result 398 states and 422 transitions. [2023-02-16 01:45:42,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 01:45:42,978 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 125 [2023-02-16 01:45:42,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:42,979 INFO L225 Difference]: With dead ends: 398 [2023-02-16 01:45:42,980 INFO L226 Difference]: Without dead ends: 382 [2023-02-16 01:45:42,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-16 01:45:42,981 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 143 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:42,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 357 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:45:42,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-02-16 01:45:43,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 326. [2023-02-16 01:45:43,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 202 states have (on average 1.0495049504950495) internal successors, (212), 209 states have internal predecessors, (212), 68 states have call successors, (68), 56 states have call predecessors, (68), 55 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-02-16 01:45:43,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 345 transitions. [2023-02-16 01:45:43,058 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 345 transitions. Word has length 125 [2023-02-16 01:45:43,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:43,058 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 345 transitions. [2023-02-16 01:45:43,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2023-02-16 01:45:43,059 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 345 transitions. [2023-02-16 01:45:43,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-16 01:45:43,060 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:43,060 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:43,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:43,265 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,SelfDestructingSolverStorable12 [2023-02-16 01:45:43,265 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:43,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:43,266 INFO L85 PathProgramCache]: Analyzing trace with hash 36255119, now seen corresponding path program 1 times [2023-02-16 01:45:43,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:43,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313302201] [2023-02-16 01:45:43,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:43,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:43,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:43,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852780382] [2023-02-16 01:45:43,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:43,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:43,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:43,274 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:43,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 01:45:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:45:43,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-16 01:45:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:43,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1106 backedges. 104 proven. 116 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-02-16 01:45:43,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:44,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:44,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313302201] [2023-02-16 01:45:44,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:44,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852780382] [2023-02-16 01:45:44,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852780382] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:45:44,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 01:45:44,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-16 01:45:44,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573803246] [2023-02-16 01:45:44,414 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:44,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:45:44,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:44,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:45:44,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2023-02-16 01:45:44,415 INFO L87 Difference]: Start difference. First operand 326 states and 345 transitions. Second operand has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-16 01:45:44,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:44,846 INFO L93 Difference]: Finished difference Result 328 states and 346 transitions. [2023-02-16 01:45:44,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 01:45:44,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 133 [2023-02-16 01:45:44,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:44,863 INFO L225 Difference]: With dead ends: 328 [2023-02-16 01:45:44,863 INFO L226 Difference]: Without dead ends: 312 [2023-02-16 01:45:44,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2023-02-16 01:45:44,864 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 12 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:44,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 149 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:45:44,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-02-16 01:45:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2023-02-16 01:45:44,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 194 states have (on average 1.0463917525773196) internal successors, (203), 201 states have internal predecessors, (203), 64 states have call successors, (64), 53 states have call predecessors, (64), 53 states have return successors, (62), 57 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-16 01:45:44,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 329 transitions. [2023-02-16 01:45:44,938 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 329 transitions. Word has length 133 [2023-02-16 01:45:44,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:44,938 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 329 transitions. [2023-02-16 01:45:44,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2023-02-16 01:45:44,939 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 329 transitions. [2023-02-16 01:45:44,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-16 01:45:44,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:44,940 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:44,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:45,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-16 01:45:45,146 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:45,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:45,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1972302768, now seen corresponding path program 2 times [2023-02-16 01:45:45,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:45,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399159493] [2023-02-16 01:45:45,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:45,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:45,157 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:45,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075517555] [2023-02-16 01:45:45,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:45:45,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:45,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:45,158 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:45,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 01:45:45,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:45:45,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:45,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-16 01:45:45,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 128 proven. 84 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2023-02-16 01:45:45,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:46,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:46,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399159493] [2023-02-16 01:45:46,325 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075517555] [2023-02-16 01:45:46,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075517555] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:45:46,325 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-16 01:45:46,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-16 01:45:46,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851018205] [2023-02-16 01:45:46,325 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:46,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 01:45:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 01:45:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-02-16 01:45:46,327 INFO L87 Difference]: Start difference. First operand 312 states and 329 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 6 states have call predecessors, (27), 7 states have call successors, (27) [2023-02-16 01:45:46,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:45:46,761 INFO L93 Difference]: Finished difference Result 325 states and 342 transitions. [2023-02-16 01:45:46,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 01:45:46,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 6 states have call predecessors, (27), 7 states have call successors, (27) Word has length 156 [2023-02-16 01:45:46,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:45:46,763 INFO L225 Difference]: With dead ends: 325 [2023-02-16 01:45:46,763 INFO L226 Difference]: Without dead ends: 323 [2023-02-16 01:45:46,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-02-16 01:45:46,764 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 11 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:45:46,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 175 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:45:46,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-02-16 01:45:46,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2023-02-16 01:45:46,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 200 states have (on average 1.045) internal successors, (209), 207 states have internal predecessors, (209), 66 states have call successors, (66), 55 states have call predecessors, (66), 55 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2023-02-16 01:45:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 339 transitions. [2023-02-16 01:45:46,825 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 339 transitions. Word has length 156 [2023-02-16 01:45:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:45:46,825 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 339 transitions. [2023-02-16 01:45:46,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (27), 6 states have call predecessors, (27), 7 states have call successors, (27) [2023-02-16 01:45:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 339 transitions. [2023-02-16 01:45:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-02-16 01:45:46,827 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:45:46,828 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:45:46,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 01:45:47,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 01:45:47,033 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:45:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:45:47,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1802004917, now seen corresponding path program 2 times [2023-02-16 01:45:47,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:45:47,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019501512] [2023-02-16 01:45:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:45:47,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:45:47,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:45:47,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [476101607] [2023-02-16 01:45:47,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:45:47,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:45:47,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:45:47,065 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:45:47,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 01:45:47,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:45:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:45:47,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-16 01:45:47,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:45:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 204 proven. 88 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2023-02-16 01:45:49,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:45:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1648 backedges. 204 proven. 88 refuted. 0 times theorem prover too weak. 1356 trivial. 0 not checked. [2023-02-16 01:45:58,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:45:58,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019501512] [2023-02-16 01:45:58,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:45:58,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476101607] [2023-02-16 01:45:58,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476101607] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:45:58,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:45:58,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2023-02-16 01:45:58,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293822717] [2023-02-16 01:45:58,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:45:58,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 01:45:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:45:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 01:45:58,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=361, Unknown=2, NotChecked=0, Total=462 [2023-02-16 01:45:58,652 INFO L87 Difference]: Start difference. First operand 322 states and 339 transitions. Second operand has 22 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 14 states have call predecessors, (56), 14 states have call successors, (56) [2023-02-16 01:46:45,540 WARN L233 SmtUtils]: Spent 46.05s on a formula simplification that was a NOOP. DAG size: 161 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:46:48,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:46:50,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:46:52,388 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:46:54,497 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:46:56,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:46:58,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:17,379 WARN L233 SmtUtils]: Spent 12.29s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:47:20,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.26s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:22,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:25,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:38,768 WARN L233 SmtUtils]: Spent 12.89s on a formula simplification that was a NOOP. DAG size: 167 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:47:49,786 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:47:51,845 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:47:54,727 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:48:14,520 WARN L233 SmtUtils]: Spent 17.26s on a formula simplification that was a NOOP. DAG size: 165 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:48:18,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:48:20,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.46s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:48:22,768 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:48:26,244 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:48:42,855 WARN L233 SmtUtils]: Spent 16.54s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:48:44,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:48:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:48:44,122 INFO L93 Difference]: Finished difference Result 346 states and 373 transitions. [2023-02-16 01:48:44,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-16 01:48:44,122 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 14 states have call predecessors, (56), 14 states have call successors, (56) Word has length 161 [2023-02-16 01:48:44,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:48:44,123 INFO L225 Difference]: With dead ends: 346 [2023-02-16 01:48:44,124 INFO L226 Difference]: Without dead ends: 320 [2023-02-16 01:48:44,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 298 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 127.4s TimeCoverageRelationStatistics Valid=302, Invalid=886, Unknown=2, NotChecked=0, Total=1190 [2023-02-16 01:48:44,124 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 33 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 134 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:48:44,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 197 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1123 Invalid, 12 Unknown, 0 Unchecked, 40.6s Time] [2023-02-16 01:48:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-16 01:48:44,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 317. [2023-02-16 01:48:44,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 194 states have (on average 1.041237113402062) internal successors, (202), 200 states have internal predecessors, (202), 70 states have call successors, (70), 53 states have call predecessors, (70), 52 states have return successors, (67), 63 states have call predecessors, (67), 67 states have call successors, (67) [2023-02-16 01:48:44,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 339 transitions. [2023-02-16 01:48:44,237 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 339 transitions. Word has length 161 [2023-02-16 01:48:44,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:48:44,237 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 339 transitions. [2023-02-16 01:48:44,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 14 states have call successors, (58), 3 states have call predecessors, (58), 2 states have return successors, (56), 14 states have call predecessors, (56), 14 states have call successors, (56) [2023-02-16 01:48:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 339 transitions. [2023-02-16 01:48:44,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-02-16 01:48:44,238 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:48:44,239 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:48:44,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 01:48:44,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 01:48:44,444 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:48:44,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:48:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash -476934806, now seen corresponding path program 3 times [2023-02-16 01:48:44,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:48:44,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114176981] [2023-02-16 01:48:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:48:44,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:48:44,456 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:48:44,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2107772964] [2023-02-16 01:48:44,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:48:44,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:48:44,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:48:44,457 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:48:44,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 01:48:45,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 01:48:45,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:48:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-16 01:48:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:49:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2168 backedges. 485 proven. 59 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2023-02-16 01:49:04,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:49:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2168 backedges. 350 proven. 19 refuted. 0 times theorem prover too weak. 1799 trivial. 0 not checked. [2023-02-16 01:49:08,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:49:08,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114176981] [2023-02-16 01:49:08,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:49:08,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107772964] [2023-02-16 01:49:08,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107772964] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:49:08,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:49:08,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2023-02-16 01:49:08,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461658752] [2023-02-16 01:49:08,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:49:08,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 01:49:08,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:49:08,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 01:49:08,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:49:08,377 INFO L87 Difference]: Start difference. First operand 317 states and 339 transitions. Second operand has 20 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2023-02-16 01:49:18,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:23,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:24,810 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:27,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:29,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:31,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:36,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-16 01:49:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:49:37,075 INFO L93 Difference]: Finished difference Result 329 states and 350 transitions. [2023-02-16 01:49:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 01:49:37,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) Word has length 184 [2023-02-16 01:49:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:49:37,077 INFO L225 Difference]: With dead ends: 329 [2023-02-16 01:49:37,077 INFO L226 Difference]: Without dead ends: 296 [2023-02-16 01:49:37,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 345 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-02-16 01:49:37,078 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 45 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:49:37,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 102 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 317 Invalid, 5 Unknown, 0 Unchecked, 19.5s Time] [2023-02-16 01:49:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-02-16 01:49:37,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 290. [2023-02-16 01:49:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 187 states have (on average 1.0053475935828877) internal successors, (188), 187 states have internal predecessors, (188), 52 states have call successors, (52), 51 states have call predecessors, (52), 50 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-02-16 01:49:37,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 291 transitions. [2023-02-16 01:49:37,161 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 291 transitions. Word has length 184 [2023-02-16 01:49:37,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:49:37,162 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 291 transitions. [2023-02-16 01:49:37,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 12 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (31), 11 states have call predecessors, (31), 10 states have call successors, (31) [2023-02-16 01:49:37,162 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 291 transitions. [2023-02-16 01:49:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-02-16 01:49:37,164 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:49:37,164 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:49:37,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-16 01:49:37,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:49:37,374 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:49:37,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:49:37,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1951591730, now seen corresponding path program 3 times [2023-02-16 01:49:37,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:49:37,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398967720] [2023-02-16 01:49:37,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:49:37,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:49:37,383 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:49:37,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2114111908] [2023-02-16 01:49:37,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:49:37,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:49:37,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:49:37,385 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:49:37,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 01:49:37,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2023-02-16 01:49:37,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:49:37,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:49:37,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:49:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 300 proven. 4880 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2023-02-16 01:49:37,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:49:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5582 backedges. 102 proven. 380 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-02-16 01:49:38,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:49:38,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398967720] [2023-02-16 01:49:38,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:49:38,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114111908] [2023-02-16 01:49:38,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114111908] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:49:38,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:49:38,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-16 01:49:38,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353227758] [2023-02-16 01:49:38,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:49:38,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 01:49:38,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:49:38,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 01:49:38,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-02-16 01:49:38,240 INFO L87 Difference]: Start difference. First operand 290 states and 291 transitions. Second operand has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) [2023-02-16 01:49:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:49:38,985 INFO L93 Difference]: Finished difference Result 636 states and 648 transitions. [2023-02-16 01:49:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-16 01:49:38,985 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) Word has length 293 [2023-02-16 01:49:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:49:38,987 INFO L225 Difference]: With dead ends: 636 [2023-02-16 01:49:38,987 INFO L226 Difference]: Without dead ends: 626 [2023-02-16 01:49:38,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2023-02-16 01:49:38,988 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 137 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:49:38,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 400 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:49:38,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2023-02-16 01:49:39,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 626. [2023-02-16 01:49:39,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 403 states have (on average 1.0024813895781637) internal successors, (404), 403 states have internal predecessors, (404), 112 states have call successors, (112), 111 states have call predecessors, (112), 110 states have return successors, (111), 111 states have call predecessors, (111), 111 states have call successors, (111) [2023-02-16 01:49:39,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 627 transitions. [2023-02-16 01:49:39,135 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 627 transitions. Word has length 293 [2023-02-16 01:49:39,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:49:39,135 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 627 transitions. [2023-02-16 01:49:39,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.076923076923077) internal successors, (106), 26 states have internal predecessors, (106), 21 states have call successors, (103), 12 states have call predecessors, (103), 12 states have return successors, (102), 21 states have call predecessors, (102), 21 states have call successors, (102) [2023-02-16 01:49:39,135 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 627 transitions. [2023-02-16 01:49:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 630 [2023-02-16 01:49:39,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:49:39,143 INFO L195 NwaCegarLoop]: trace histogram [112, 111, 111, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:49:39,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 01:49:39,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 01:49:39,349 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:49:39,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:49:39,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1604221590, now seen corresponding path program 4 times [2023-02-16 01:49:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:49:39,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667101867] [2023-02-16 01:49:39,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:49:39,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:49:39,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:49:39,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1845836628] [2023-02-16 01:49:39,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:49:39,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:49:39,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:49:39,367 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:49:39,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 01:49:39,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:49:39,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:49:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 1358 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-16 01:49:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:49:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 26534 backedges. 660 proven. 24992 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2023-02-16 01:49:40,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:49:41,023 INFO L134 CoverageAnalysis]: Checked inductivity of 26534 backedges. 222 proven. 1892 refuted. 0 times theorem prover too weak. 24420 trivial. 0 not checked. [2023-02-16 01:49:41,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:49:41,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667101867] [2023-02-16 01:49:41,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-16 01:49:41,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845836628] [2023-02-16 01:49:41,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845836628] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:49:41,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-16 01:49:41,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26] total 50 [2023-02-16 01:49:41,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453714125] [2023-02-16 01:49:41,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-16 01:49:41,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-16 01:49:41,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:49:41,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-16 01:49:41,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2023-02-16 01:49:41,027 INFO L87 Difference]: Start difference. First operand 626 states and 627 transitions. Second operand has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) [2023-02-16 01:49:43,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:49:43,071 INFO L93 Difference]: Finished difference Result 1308 states and 1332 transitions. [2023-02-16 01:49:43,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-16 01:49:43,072 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) Word has length 629 [2023-02-16 01:49:43,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:49:43,076 INFO L225 Difference]: With dead ends: 1308 [2023-02-16 01:49:43,076 INFO L226 Difference]: Without dead ends: 1298 [2023-02-16 01:49:43,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1301 GetRequests, 1208 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2023-02-16 01:49:43,078 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 287 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 1179 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-16 01:49:43,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [287 Valid, 769 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1179 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-16 01:49:43,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2023-02-16 01:49:43,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1298. [2023-02-16 01:49:43,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 835 states have (on average 1.0011976047904192) internal successors, (836), 835 states have internal predecessors, (836), 232 states have call successors, (232), 231 states have call predecessors, (232), 230 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2023-02-16 01:49:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1299 transitions. [2023-02-16 01:49:43,402 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1299 transitions. Word has length 629 [2023-02-16 01:49:43,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:49:43,404 INFO L495 AbstractCegarLoop]: Abstraction has 1298 states and 1299 transitions. [2023-02-16 01:49:43,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.28) internal successors, (214), 50 states have internal predecessors, (214), 45 states have call successors, (223), 24 states have call predecessors, (223), 24 states have return successors, (222), 45 states have call predecessors, (222), 45 states have call successors, (222) [2023-02-16 01:49:43,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1299 transitions. [2023-02-16 01:49:43,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1302 [2023-02-16 01:49:43,416 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:49:43,417 INFO L195 NwaCegarLoop]: trace histogram [232, 231, 231, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:49:43,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 01:49:43,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:49:43,624 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:49:43,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:49:43,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1590306266, now seen corresponding path program 5 times [2023-02-16 01:49:43,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:49:43,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321476968] [2023-02-16 01:49:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:49:43,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:49:43,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-16 01:49:43,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051171095] [2023-02-16 01:49:43,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:49:43,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:49:43,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:49:43,654 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:49:43,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process