./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.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 404aca328acb019974a4013e1ced341d9a60ed0a822c21407be3158ee94f2c2d --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 22:22:15,390 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 22:22:15,391 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 22:22:15,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 22:22:15,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 22:22:15,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 22:22:15,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 22:22:15,421 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 22:22:15,423 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 22:22:15,423 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 22:22:15,424 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 22:22:15,425 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 22:22:15,425 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 22:22:15,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 22:22:15,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 22:22:15,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 22:22:15,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 22:22:15,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 22:22:15,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 22:22:15,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 22:22:15,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 22:22:15,437 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 22:22:15,439 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 22:22:15,440 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 22:22:15,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 22:22:15,450 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 22:22:15,450 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 22:22:15,452 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 22:22:15,453 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 22:22:15,454 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 22:22:15,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 22:22:15,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 22:22:15,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 22:22:15,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 22:22:15,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 22:22:15,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 22:22:15,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 22:22:15,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 22:22:15,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 22:22:15,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 22:22:15,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 22:22:15,462 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 22:22:15,497 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 22:22:15,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 22:22:15,498 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 22:22:15,498 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 22:22:15,499 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 22:22:15,499 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 22:22:15,500 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 22:22:15,500 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 22:22:15,500 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 22:22:15,501 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 22:22:15,501 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 22:22:15,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 22:22:15,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 22:22:15,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 22:22:15,502 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 22:22:15,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 22:22:15,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 22:22:15,503 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 22:22:15,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 22:22:15,503 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 22:22:15,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 22:22:15,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 22:22:15,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 22:22:15,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 22:22:15,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:22:15,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 22:22:15,504 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 22:22:15,505 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 22:22:15,505 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 22:22:15,505 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 22:22:15,505 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 22:22:15,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 22:22:15,506 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 22:22:15,506 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 22:22:15,506 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 22:22:15,506 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 404aca328acb019974a4013e1ced341d9a60ed0a822c21407be3158ee94f2c2d [2023-02-13 22:22:15,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 22:22:15,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 22:22:15,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 22:22:15,789 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 22:22:15,789 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 22:22:15,790 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c [2023-02-13 22:22:16,976 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 22:22:17,182 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 22:22:17,182 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c [2023-02-13 22:22:17,187 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf64aab07/0dec27606cc64b0e94e9fd4e757522d7/FLAGa89640409 [2023-02-13 22:22:17,200 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf64aab07/0dec27606cc64b0e94e9fd4e757522d7 [2023-02-13 22:22:17,202 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 22:22:17,204 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 22:22:17,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 22:22:17,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 22:22:17,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 22:22:17,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a91574f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17, skipping insertion in model container [2023-02-13 22:22:17,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 22:22:17,228 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 22:22:17,355 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c[333,346] [2023-02-13 22:22:17,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:22:17,379 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 22:22:17,388 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-programs/partial_mod_count_limited_gen.c[333,346] [2023-02-13 22:22:17,395 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:22:17,412 INFO L208 MainTranslator]: Completed translation [2023-02-13 22:22:17,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17 WrapperNode [2023-02-13 22:22:17,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 22:22:17,413 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 22:22:17,413 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 22:22:17,413 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 22:22:17,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,424 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,442 INFO L138 Inliner]: procedures = 16, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2023-02-13 22:22:17,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 22:22:17,443 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 22:22:17,443 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 22:22:17,443 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 22:22:17,450 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,458 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,472 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,476 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,478 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 22:22:17,479 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 22:22:17,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 22:22:17,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 22:22:17,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (1/1) ... [2023-02-13 22:22:17,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:22:17,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:22:17,502 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) [2023-02-13 22:22:17,508 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 [2023-02-13 22:22:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 22:22:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-13 22:22:17,535 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-13 22:22:17,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 22:22:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 22:22:17,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 22:22:17,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 22:22:17,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 22:22:17,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 22:22:17,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 22:22:17,601 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 22:22:17,603 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 22:22:17,765 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 22:22:17,770 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 22:22:17,771 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-13 22:22:17,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:22:17 BoogieIcfgContainer [2023-02-13 22:22:17,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 22:22:17,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 22:22:17,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 22:22:17,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 22:22:17,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 10:22:17" (1/3) ... [2023-02-13 22:22:17,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47082833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:22:17, skipping insertion in model container [2023-02-13 22:22:17,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:22:17" (2/3) ... [2023-02-13 22:22:17,778 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47082833 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:22:17, skipping insertion in model container [2023-02-13 22:22:17,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:22:17" (3/3) ... [2023-02-13 22:22:17,779 INFO L112 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_gen.c [2023-02-13 22:22:17,796 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 22:22:17,796 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 22:22:17,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 22:22:17,842 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;@6327b617, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 22:22:17,842 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 22:22:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:22:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-13 22:22:17,853 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:22:17,853 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:22:17,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:22:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:22:17,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1878530085, now seen corresponding path program 1 times [2023-02-13 22:22:17,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:22:17,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391936491] [2023-02-13 22:22:17,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:22:17,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:22:17,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:22:18,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:22:18,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391936491] [2023-02-13 22:22:18,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-13 22:22:18,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990426043] [2023-02-13 22:22:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:22:18,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:22:18,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:22:18,017 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) [2023-02-13 22:22:18,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 22:22:18,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:22:18,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-13 22:22:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:22:18,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 22:22:18,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 22:22:18,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990426043] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:22:18,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:22:18,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 22:22:18,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847042036] [2023-02-13 22:22:18,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:22:18,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 22:22:18,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:22:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 22:22:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:22:18,260 INFO L87 Difference]: Start difference. First operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:22:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:22:18,281 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2023-02-13 22:22:18,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 22:22:18,284 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2023-02-13 22:22:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:22:18,290 INFO L225 Difference]: With dead ends: 51 [2023-02-13 22:22:18,290 INFO L226 Difference]: Without dead ends: 23 [2023-02-13 22:22:18,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:22:18,299 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2023-02-13 22:22:18,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:22:18,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-13 22:22:18,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-02-13 22:22:18,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:22:18,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-02-13 22:22:18,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2023-02-13 22:22:18,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:22:18,349 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-02-13 22:22:18,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:22:18,350 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-02-13 22:22:18,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-13 22:22:18,352 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:22:18,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:22:18,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 22:22:18,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-13 22:22:18,563 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:22:18,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:22:18,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2096433435, now seen corresponding path program 1 times [2023-02-13 22:22:18,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:22:18,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531250637] [2023-02-13 22:22:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:22:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:22:18,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:22:18,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [371521084] [2023-02-13 22:22:18,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:22:18,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:22:18,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:22:18,607 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) [2023-02-13 22:22:18,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 22:22:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:22:18,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 22:22:18,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:22:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 22:22:18,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 22:22:18,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:22:18,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531250637] [2023-02-13 22:22:18,746 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:22:18,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371521084] [2023-02-13 22:22:18,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371521084] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:22:18,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:22:18,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:22:18,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403205985] [2023-02-13 22:22:18,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:22:18,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 22:22:18,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:22:18,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 22:22:18,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:22:18,760 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 22:22:19,915 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-13 22:22:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:22:19,917 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2023-02-13 22:22:19,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 22:22:19,922 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2023-02-13 22:22:19,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:22:19,923 INFO L225 Difference]: With dead ends: 45 [2023-02-13 22:22:19,923 INFO L226 Difference]: Without dead ends: 36 [2023-02-13 22:22:19,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 22:22:19,925 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:22:19,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 29 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-13 22:22:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-13 22:22:19,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 24. [2023-02-13 22:22:19,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:22:19,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-13 22:22:19,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 20 [2023-02-13 22:22:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:22:19,932 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-13 22:22:19,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-13 22:22:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-13 22:22:19,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-13 22:22:19,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:22:19,934 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:22:19,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 22:22:20,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-13 22:22:20,140 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:22:20,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:22:20,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1636168002, now seen corresponding path program 1 times [2023-02-13 22:22:20,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:22:20,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556506772] [2023-02-13 22:22:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:22:20,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:22:20,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:22:20,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139725845] [2023-02-13 22:22:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:22:20,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:22:20,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:22:20,172 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) [2023-02-13 22:22:20,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 22:22:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:22:20,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 22:22:20,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:22:20,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 22:22:20,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:22:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 22:22:20,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:22:20,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556506772] [2023-02-13 22:22:20,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:22:20,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139725845] [2023-02-13 22:22:20,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139725845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:22:20,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:22:20,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-13 22:22:20,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426172325] [2023-02-13 22:22:20,390 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:22:20,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-13 22:22:20,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:22:20,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-13 22:22:20,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-02-13 22:22:20,391 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:22:22,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-13 22:22:24,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-13 22:22:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:22:24,332 INFO L93 Difference]: Finished difference Result 73 states and 91 transitions. [2023-02-13 22:22:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-13 22:22:24,333 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 25 [2023-02-13 22:22:24,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:22:24,334 INFO L225 Difference]: With dead ends: 73 [2023-02-13 22:22:24,334 INFO L226 Difference]: Without dead ends: 64 [2023-02-13 22:22:24,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2023-02-13 22:22:24,335 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 85 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-13 22:22:24,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 54 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 64 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2023-02-13 22:22:24,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-13 22:22:24,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2023-02-13 22:22:24,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:22:24,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2023-02-13 22:22:24,343 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 25 [2023-02-13 22:22:24,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:22:24,343 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2023-02-13 22:22:24,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:22:24,344 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2023-02-13 22:22:24,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-13 22:22:24,345 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:22:24,345 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:22:24,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 22:22:24,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:22:24,550 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:22:24,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:22:24,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1458835931, now seen corresponding path program 2 times [2023-02-13 22:22:24,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:22:24,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124986625] [2023-02-13 22:22:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:22:24,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:22:24,578 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:22:24,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [275301482] [2023-02-13 22:22:24,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:22:24,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:22:24,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:22:24,586 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) [2023-02-13 22:22:24,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 22:22:24,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:22:24,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:22:24,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-13 22:22:24,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:22:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 22:22:24,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:22:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 22:22:24,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:22:24,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124986625] [2023-02-13 22:22:24,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-13 22:22:24,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275301482] [2023-02-13 22:22:24,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275301482] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:22:24,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-13 22:22:24,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-13 22:22:24,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200556661] [2023-02-13 22:22:24,977 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-13 22:22:24,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 22:22:24,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:22:24,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 22:22:24,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-02-13 22:22:24,979 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:22:26,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-13 22:22:26,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:22:26,947 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2023-02-13 22:22:26,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-13 22:22:26,948 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-02-13 22:22:26,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:22:26,949 INFO L225 Difference]: With dead ends: 151 [2023-02-13 22:22:26,949 INFO L226 Difference]: Without dead ends: 142 [2023-02-13 22:22:26,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2023-02-13 22:22:26,950 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 278 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-13 22:22:26,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 102 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-13 22:22:26,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-13 22:22:26,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 69. [2023-02-13 22:22:26,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 65 states have (on average 1.353846153846154) internal successors, (88), 65 states have internal predecessors, (88), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-13 22:22:26,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 92 transitions. [2023-02-13 22:22:26,961 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 92 transitions. Word has length 40 [2023-02-13 22:22:26,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:22:26,961 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 92 transitions. [2023-02-13 22:22:26,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-13 22:22:26,962 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 92 transitions. [2023-02-13 22:22:26,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-13 22:22:26,963 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:22:26,964 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:22:26,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 22:22:27,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:22:27,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:22:27,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:22:27,171 INFO L85 PathProgramCache]: Analyzing trace with hash -54174981, now seen corresponding path program 3 times [2023-02-13 22:22:27,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:22:27,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899152887] [2023-02-13 22:22:27,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:22:27,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:22:27,200 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-13 22:22:27,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668972560] [2023-02-13 22:22:27,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:22:27,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:22:27,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:22:27,209 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) [2023-02-13 22:22:27,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process