./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/bitvector/soft_float_3a.c.cil.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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 19:21:51,427 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 19:21:51,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 19:21:51,462 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 19:21:51,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 19:21:51,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 19:21:51,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 19:21:51,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 19:21:51,470 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 19:21:51,470 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 19:21:51,471 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 19:21:51,472 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 19:21:51,472 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 19:21:51,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 19:21:51,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 19:21:51,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 19:21:51,477 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 19:21:51,481 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 19:21:51,482 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 19:21:51,484 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 19:21:51,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 19:21:51,489 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 19:21:51,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 19:21:51,490 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 19:21:51,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 19:21:51,494 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 19:21:51,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 19:21:51,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 19:21:51,496 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 19:21:51,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 19:21:51,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 19:21:51,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 19:21:51,498 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 19:21:51,499 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 19:21:51,500 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 19:21:51,501 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 19:21:51,501 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 19:21:51,502 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 19:21:51,502 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 19:21:51,502 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 19:21:51,503 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 19:21:51,504 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 19:21:51,522 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 19:21:51,524 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 19:21:51,525 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 19:21:51,525 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 19:21:51,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 19:21:51,526 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 19:21:51,526 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 19:21:51,526 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 19:21:51,526 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 19:21:51,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 19:21:51,527 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 19:21:51,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 19:21:51,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 19:21:51,528 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 19:21:51,528 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 19:21:51,528 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 19:21:51,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 19:21:51,528 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 19:21:51,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 19:21:51,528 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 19:21:51,529 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 19:21:51,529 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 19:21:51,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 19:21:51,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 19:21:51,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:21:51,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 19:21:51,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 19:21:51,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 19:21:51,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 19:21:51,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 19:21:51,530 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 19:21:51,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 19:21:51,536 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 19:21:51,537 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 19:21:51,537 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 19:21:51,537 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2023-02-15 19:21:51,696 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 19:21:51,710 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 19:21:51,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 19:21:51,713 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 19:21:51,713 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 19:21:51,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-02-15 19:21:52,686 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 19:21:52,945 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 19:21:52,952 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2023-02-15 19:21:52,962 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba9a6a48/a53fb1ee12d9407699767aec36f7724b/FLAG7efc766ea [2023-02-15 19:21:52,994 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ba9a6a48/a53fb1ee12d9407699767aec36f7724b [2023-02-15 19:21:52,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 19:21:52,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 19:21:53,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 19:21:53,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 19:21:53,010 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 19:21:53,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:21:52" (1/1) ... [2023-02-15 19:21:53,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@394d598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53, skipping insertion in model container [2023-02-15 19:21:53,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 07:21:52" (1/1) ... [2023-02-15 19:21:53,020 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 19:21:53,054 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 19:21:53,205 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-02-15 19:21:53,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:21:53,238 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 19:21:53,246 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/bitvector/soft_float_3a.c.cil.c[728,741] [2023-02-15 19:21:53,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 19:21:53,272 INFO L208 MainTranslator]: Completed translation [2023-02-15 19:21:53,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53 WrapperNode [2023-02-15 19:21:53,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 19:21:53,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 19:21:53,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 19:21:53,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 19:21:53,278 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,283 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,311 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 166 [2023-02-15 19:21:53,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 19:21:53,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 19:21:53,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 19:21:53,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 19:21:53,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,322 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,326 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,329 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 19:21:53,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 19:21:53,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 19:21:53,333 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 19:21:53,334 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (1/1) ... [2023-02-15 19:21:53,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 19:21:53,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:53,356 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) [2023-02-15 19:21:53,367 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 [2023-02-15 19:21:53,398 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 19:21:53,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 19:21:53,399 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-15 19:21:53,399 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-15 19:21:53,400 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 19:21:53,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 19:21:53,401 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 19:21:53,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 19:21:53,457 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 19:21:53,458 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 19:21:53,666 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 19:21:53,685 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 19:21:53,685 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 19:21:53,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:21:53 BoogieIcfgContainer [2023-02-15 19:21:53,687 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 19:21:53,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 19:21:53,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 19:21:53,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 19:21:53,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 07:21:52" (1/3) ... [2023-02-15 19:21:53,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f1c67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:21:53, skipping insertion in model container [2023-02-15 19:21:53,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 07:21:53" (2/3) ... [2023-02-15 19:21:53,694 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f1c67c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 07:21:53, skipping insertion in model container [2023-02-15 19:21:53,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 07:21:53" (3/3) ... [2023-02-15 19:21:53,695 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2023-02-15 19:21:53,706 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 19:21:53,720 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 19:21:53,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 19:21:53,771 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;@40c77d43, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 19:21:53,771 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 19:21:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 74 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 67 states have internal predecessors, (105), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 19:21:53,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 19:21:53,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:53,785 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:53,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:53,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:53,794 INFO L85 PathProgramCache]: Analyzing trace with hash -674615112, now seen corresponding path program 1 times [2023-02-15 19:21:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030577719] [2023-02-15 19:21:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:54,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:21:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,125 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 19:21:54,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:54,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030577719] [2023-02-15 19:21:54,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030577719] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:54,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:54,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 19:21:54,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674264578] [2023-02-15 19:21:54,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:54,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 19:21:54,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:54,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 19:21:54,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:21:54,170 INFO L87 Difference]: Start difference. First operand has 74 states, 65 states have (on average 1.6153846153846154) internal successors, (105), 67 states have internal predecessors, (105), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:54,224 INFO L93 Difference]: Finished difference Result 150 states and 236 transitions. [2023-02-15 19:21:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 19:21:54,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2023-02-15 19:21:54,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:54,231 INFO L225 Difference]: With dead ends: 150 [2023-02-15 19:21:54,231 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 19:21:54,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 19:21:54,236 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 4 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:54,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 210 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 19:21:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-15 19:21:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 19:21:54,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 100 transitions. [2023-02-15 19:21:54,263 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 100 transitions. Word has length 41 [2023-02-15 19:21:54,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:54,264 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 100 transitions. [2023-02-15 19:21:54,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:54,264 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 100 transitions. [2023-02-15 19:21:54,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 19:21:54,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:54,266 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:54,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 19:21:54,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1043963262, now seen corresponding path program 1 times [2023-02-15 19:21:54,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:54,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745445892] [2023-02-15 19:21:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:54,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:54,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:21:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,369 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 19:21:54,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:54,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745445892] [2023-02-15 19:21:54,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745445892] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:54,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:54,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 19:21:54,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812484063] [2023-02-15 19:21:54,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:54,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:21:54,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:21:54,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 19:21:54,373 INFO L87 Difference]: Start difference. First operand 68 states and 100 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:54,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:54,392 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2023-02-15 19:21:54,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:21:54,393 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-02-15 19:21:54,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:54,395 INFO L225 Difference]: With dead ends: 78 [2023-02-15 19:21:54,395 INFO L226 Difference]: Without dead ends: 68 [2023-02-15 19:21:54,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 19:21:54,396 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 1 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:54,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 292 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:54,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-15 19:21:54,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-02-15 19:21:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 61 states have (on average 1.4754098360655739) internal successors, (90), 61 states have internal predecessors, (90), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 19:21:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 99 transitions. [2023-02-15 19:21:54,402 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 99 transitions. Word has length 43 [2023-02-15 19:21:54,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:54,403 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 99 transitions. [2023-02-15 19:21:54,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 99 transitions. [2023-02-15 19:21:54,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 19:21:54,404 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:54,404 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:54,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 19:21:54,404 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:54,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:54,405 INFO L85 PathProgramCache]: Analyzing trace with hash 234616636, now seen corresponding path program 1 times [2023-02-15 19:21:54,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:54,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846416669] [2023-02-15 19:21:54,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:54,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:54,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:54,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:21:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,532 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:54,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:54,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846416669] [2023-02-15 19:21:54,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846416669] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:54,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482311722] [2023-02-15 19:21:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:54,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:54,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:54,547 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) [2023-02-15 19:21:54,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 19:21:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 19:21:54,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:21:54,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 19:21:54,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482311722] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:54,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:21:54,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 8] total 14 [2023-02-15 19:21:54,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578615406] [2023-02-15 19:21:54,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:54,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:21:54,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:54,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:21:54,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-15 19:21:54,802 INFO L87 Difference]: Start difference. First operand 68 states and 99 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:54,848 INFO L93 Difference]: Finished difference Result 139 states and 204 transitions. [2023-02-15 19:21:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 19:21:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2023-02-15 19:21:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:54,850 INFO L225 Difference]: With dead ends: 139 [2023-02-15 19:21:54,850 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 19:21:54,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:21:54,852 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 41 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:54,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 454 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 19:21:54,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2023-02-15 19:21:54,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 66 states have internal predecessors, (95), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-15 19:21:54,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 108 transitions. [2023-02-15 19:21:54,859 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 108 transitions. Word has length 43 [2023-02-15 19:21:54,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:54,859 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 108 transitions. [2023-02-15 19:21:54,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:54,860 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 108 transitions. [2023-02-15 19:21:54,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 19:21:54,861 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:54,861 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:54,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:55,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:55,066 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:55,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:55,067 INFO L85 PathProgramCache]: Analyzing trace with hash -352189378, now seen corresponding path program 1 times [2023-02-15 19:21:55,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:55,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372160821] [2023-02-15 19:21:55,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:55,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 19:21:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 19:21:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:55,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:55,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372160821] [2023-02-15 19:21:55,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372160821] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:55,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851839478] [2023-02-15 19:21:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:55,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:55,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:55,196 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) [2023-02-15 19:21:55,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 19:21:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 19:21:55,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:55,341 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:21:55,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 19:21:55,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851839478] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:21:55,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:21:55,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 6] total 14 [2023-02-15 19:21:55,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530444504] [2023-02-15 19:21:55,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:21:55,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 19:21:55,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:55,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 19:21:55,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-15 19:21:55,448 INFO L87 Difference]: Start difference. First operand 74 states and 108 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 19:21:55,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:55,664 INFO L93 Difference]: Finished difference Result 215 states and 325 transitions. [2023-02-15 19:21:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 19:21:55,664 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2023-02-15 19:21:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:55,665 INFO L225 Difference]: With dead ends: 215 [2023-02-15 19:21:55,666 INFO L226 Difference]: Without dead ends: 144 [2023-02-15 19:21:55,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2023-02-15 19:21:55,667 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 164 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:55,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 737 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:21:55,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-15 19:21:55,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 127. [2023-02-15 19:21:55,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 116 states have (on average 1.4310344827586208) internal successors, (166), 115 states have internal predecessors, (166), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 19:21:55,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 187 transitions. [2023-02-15 19:21:55,677 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 187 transitions. Word has length 43 [2023-02-15 19:21:55,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:55,677 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 187 transitions. [2023-02-15 19:21:55,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 19:21:55,678 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 187 transitions. [2023-02-15 19:21:55,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 19:21:55,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:55,679 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:55,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:55,889 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,SelfDestructingSolverStorable3 [2023-02-15 19:21:55,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1940694518, now seen corresponding path program 1 times [2023-02-15 19:21:55,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:55,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791404849] [2023-02-15 19:21:55,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:55,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:55,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:55,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 19:21:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 19:21:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:55,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:55,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791404849] [2023-02-15 19:21:55,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791404849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:55,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265370307] [2023-02-15 19:21:55,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:55,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:55,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:55,970 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) [2023-02-15 19:21:55,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 19:21:56,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 19:21:56,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:21:56,047 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:21:56,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265370307] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:56,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 19:21:56,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-02-15 19:21:56,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689375506] [2023-02-15 19:21:56,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:56,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 19:21:56,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:56,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 19:21:56,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:21:56,049 INFO L87 Difference]: Start difference. First operand 127 states and 187 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:21:56,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:56,085 INFO L93 Difference]: Finished difference Result 256 states and 379 transitions. [2023-02-15 19:21:56,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 19:21:56,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2023-02-15 19:21:56,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:56,087 INFO L225 Difference]: With dead ends: 256 [2023-02-15 19:21:56,087 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 19:21:56,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 19:21:56,088 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 20 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:56,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 252 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:56,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 19:21:56,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2023-02-15 19:21:56,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 120 states have (on average 1.425) internal successors, (171), 120 states have internal predecessors, (171), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 19:21:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 195 transitions. [2023-02-15 19:21:56,096 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 195 transitions. Word has length 48 [2023-02-15 19:21:56,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:56,096 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 195 transitions. [2023-02-15 19:21:56,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:21:56,096 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 195 transitions. [2023-02-15 19:21:56,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 19:21:56,098 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:56,098 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:56,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:56,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:56,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:56,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:56,303 INFO L85 PathProgramCache]: Analyzing trace with hash -740139086, now seen corresponding path program 1 times [2023-02-15 19:21:56,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:56,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455894791] [2023-02-15 19:21:56,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:56,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 19:21:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 19:21:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:56,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455894791] [2023-02-15 19:21:56,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455894791] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:56,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679218404] [2023-02-15 19:21:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:56,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:56,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:56,368 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) [2023-02-15 19:21:56,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 19:21:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 19:21:56,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:21:56,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:56,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679218404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:21:56,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:21:56,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-02-15 19:21:56,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591228726] [2023-02-15 19:21:56,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:21:56,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 19:21:56,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:56,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 19:21:56,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-15 19:21:56,509 INFO L87 Difference]: Start difference. First operand 132 states and 195 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 19:21:56,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:56,612 INFO L93 Difference]: Finished difference Result 330 states and 506 transitions. [2023-02-15 19:21:56,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 19:21:56,613 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-15 19:21:56,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:56,614 INFO L225 Difference]: With dead ends: 330 [2023-02-15 19:21:56,614 INFO L226 Difference]: Without dead ends: 205 [2023-02-15 19:21:56,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-02-15 19:21:56,615 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 170 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:56,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 447 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:21:56,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-02-15 19:21:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 146. [2023-02-15 19:21:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.455223880597015) internal successors, (195), 134 states have internal predecessors, (195), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 19:21:56,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 219 transitions. [2023-02-15 19:21:56,626 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 219 transitions. Word has length 51 [2023-02-15 19:21:56,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:56,626 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 219 transitions. [2023-02-15 19:21:56,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 19:21:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 219 transitions. [2023-02-15 19:21:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 19:21:56,628 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:56,628 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:56,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:56,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:56,832 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:56,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1188656450, now seen corresponding path program 1 times [2023-02-15 19:21:56,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:56,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270994372] [2023-02-15 19:21:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:56,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:56,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:56,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 19:21:56,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 19:21:56,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:56,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:56,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270994372] [2023-02-15 19:21:56,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270994372] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:56,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594187973] [2023-02-15 19:21:56,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:56,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:56,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:56,942 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) [2023-02-15 19:21:56,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 19:21:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:56,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 19:21:56,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:57,024 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:57,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:57,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 19:21:57,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594187973] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:57,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-15 19:21:57,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 7] total 13 [2023-02-15 19:21:57,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883246562] [2023-02-15 19:21:57,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:57,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:21:57,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:57,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:21:57,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:21:57,075 INFO L87 Difference]: Start difference. First operand 146 states and 219 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:57,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:57,106 INFO L93 Difference]: Finished difference Result 169 states and 243 transitions. [2023-02-15 19:21:57,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 19:21:57,107 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2023-02-15 19:21:57,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:57,108 INFO L225 Difference]: With dead ends: 169 [2023-02-15 19:21:57,108 INFO L226 Difference]: Without dead ends: 163 [2023-02-15 19:21:57,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-02-15 19:21:57,109 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 22 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:57,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 373 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:57,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-02-15 19:21:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2023-02-15 19:21:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.4161073825503356) internal successors, (211), 149 states have internal predecessors, (211), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-15 19:21:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 235 transitions. [2023-02-15 19:21:57,115 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 235 transitions. Word has length 53 [2023-02-15 19:21:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:57,115 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 235 transitions. [2023-02-15 19:21:57,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 235 transitions. [2023-02-15 19:21:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-15 19:21:57,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:57,116 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:57,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:57,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:57,336 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1245914752, now seen corresponding path program 1 times [2023-02-15 19:21:57,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:57,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704897710] [2023-02-15 19:21:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:57,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:57,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:57,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 19:21:57,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 19:21:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 19:21:57,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:57,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704897710] [2023-02-15 19:21:57,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704897710] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:57,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 19:21:57,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 19:21:57,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258303222] [2023-02-15 19:21:57,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:57,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 19:21:57,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 19:21:57,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 19:21:57,411 INFO L87 Difference]: Start difference. First operand 161 states and 235 transitions. Second operand has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:57,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:57,432 INFO L93 Difference]: Finished difference Result 167 states and 240 transitions. [2023-02-15 19:21:57,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 19:21:57,432 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 53 [2023-02-15 19:21:57,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:57,434 INFO L225 Difference]: With dead ends: 167 [2023-02-15 19:21:57,434 INFO L226 Difference]: Without dead ends: 150 [2023-02-15 19:21:57,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:21:57,434 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:57,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 475 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 19:21:57,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-15 19:21:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-02-15 19:21:57,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.4202898550724639) internal successors, (196), 139 states have internal predecessors, (196), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 19:21:57,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2023-02-15 19:21:57,440 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 53 [2023-02-15 19:21:57,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:57,440 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2023-02-15 19:21:57,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 19:21:57,440 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2023-02-15 19:21:57,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 19:21:57,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:57,441 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:57,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 19:21:57,441 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:57,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:57,441 INFO L85 PathProgramCache]: Analyzing trace with hash 660451629, now seen corresponding path program 1 times [2023-02-15 19:21:57,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:57,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572695792] [2023-02-15 19:21:57,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:57,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:57,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-15 19:21:57,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-15 19:21:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,509 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:57,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:57,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572695792] [2023-02-15 19:21:57,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572695792] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:57,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250721525] [2023-02-15 19:21:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:57,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:57,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:57,511 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) [2023-02-15 19:21:57,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 19:21:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 19:21:57,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:21:57,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 19:21:57,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250721525] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 19:21:57,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 19:21:57,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-02-15 19:21:57,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600114996] [2023-02-15 19:21:57,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 19:21:57,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 19:21:57,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:57,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 19:21:57,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-15 19:21:57,597 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:21:57,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:57,677 INFO L93 Difference]: Finished difference Result 321 states and 469 transitions. [2023-02-15 19:21:57,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 19:21:57,678 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2023-02-15 19:21:57,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:57,679 INFO L225 Difference]: With dead ends: 321 [2023-02-15 19:21:57,679 INFO L226 Difference]: Without dead ends: 178 [2023-02-15 19:21:57,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 19:21:57,680 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 29 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:57,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 322 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:21:57,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-15 19:21:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 150. [2023-02-15 19:21:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 138 states have (on average 1.4202898550724639) internal successors, (196), 139 states have internal predecessors, (196), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 19:21:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 217 transitions. [2023-02-15 19:21:57,686 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 217 transitions. Word has length 55 [2023-02-15 19:21:57,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:57,686 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 217 transitions. [2023-02-15 19:21:57,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 19:21:57,686 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 217 transitions. [2023-02-15 19:21:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 19:21:57,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:57,686 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:57,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:57,891 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 [2023-02-15 19:21:57,891 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:57,892 INFO L85 PathProgramCache]: Analyzing trace with hash 340970481, now seen corresponding path program 1 times [2023-02-15 19:21:57,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:57,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761486606] [2023-02-15 19:21:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:57,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 19:21:57,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-15 19:21:57,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:57,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:57,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761486606] [2023-02-15 19:21:57,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761486606] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:57,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94030980] [2023-02-15 19:21:57,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:57,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:57,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:57,989 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) [2023-02-15 19:21:58,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 19:21:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 19:21:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:21:58,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:58,156 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:58,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94030980] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:21:58,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:21:58,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-02-15 19:21:58,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056554783] [2023-02-15 19:21:58,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:21:58,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 19:21:58,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:58,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 19:21:58,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-02-15 19:21:58,158 INFO L87 Difference]: Start difference. First operand 150 states and 217 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 19:21:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:58,539 INFO L93 Difference]: Finished difference Result 343 states and 506 transitions. [2023-02-15 19:21:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 19:21:58,540 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2023-02-15 19:21:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:58,540 INFO L225 Difference]: With dead ends: 343 [2023-02-15 19:21:58,541 INFO L226 Difference]: Without dead ends: 200 [2023-02-15 19:21:58,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2023-02-15 19:21:58,541 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 148 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:58,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 500 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:21:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-02-15 19:21:58,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 149. [2023-02-15 19:21:58,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 137 states have (on average 1.416058394160584) internal successors, (194), 138 states have internal predecessors, (194), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 19:21:58,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 215 transitions. [2023-02-15 19:21:58,555 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 215 transitions. Word has length 58 [2023-02-15 19:21:58,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:58,555 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 215 transitions. [2023-02-15 19:21:58,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 19:21:58,556 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 215 transitions. [2023-02-15 19:21:58,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 19:21:58,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:58,556 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:58,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 19:21:58,760 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 [2023-02-15 19:21:58,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:58,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:58,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1788145183, now seen corresponding path program 1 times [2023-02-15 19:21:58,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:58,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777680219] [2023-02-15 19:21:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:58,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-15 19:21:58,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 19:21:58,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:58,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777680219] [2023-02-15 19:21:58,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777680219] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:58,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476370495] [2023-02-15 19:21:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:58,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:58,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:58,844 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) [2023-02-15 19:21:58,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 19:21:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:58,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 19:21:58,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:21:58,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:21:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:59,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476370495] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:21:59,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:21:59,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-02-15 19:21:59,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918154126] [2023-02-15 19:21:59,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:21:59,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 19:21:59,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:21:59,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 19:21:59,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2023-02-15 19:21:59,101 INFO L87 Difference]: Start difference. First operand 149 states and 215 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 19:21:59,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:21:59,281 INFO L93 Difference]: Finished difference Result 448 states and 678 transitions. [2023-02-15 19:21:59,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 19:21:59,281 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2023-02-15 19:21:59,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:21:59,283 INFO L225 Difference]: With dead ends: 448 [2023-02-15 19:21:59,283 INFO L226 Difference]: Without dead ends: 306 [2023-02-15 19:21:59,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=294, Invalid=462, Unknown=0, NotChecked=0, Total=756 [2023-02-15 19:21:59,284 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 545 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 19:21:59,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 596 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 19:21:59,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-15 19:21:59,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2023-02-15 19:21:59,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 156 states have (on average 1.4487179487179487) internal successors, (226), 157 states have internal predecessors, (226), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 19:21:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 247 transitions. [2023-02-15 19:21:59,299 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 247 transitions. Word has length 62 [2023-02-15 19:21:59,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:21:59,300 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 247 transitions. [2023-02-15 19:21:59,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 19:21:59,300 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 247 transitions. [2023-02-15 19:21:59,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-15 19:21:59,301 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:21:59,301 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:21:59,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 19:21:59,505 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 [2023-02-15 19:21:59,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:21:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:21:59,506 INFO L85 PathProgramCache]: Analyzing trace with hash -71739151, now seen corresponding path program 2 times [2023-02-15 19:21:59,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:21:59,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739762033] [2023-02-15 19:21:59,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:21:59,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:21:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:21:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:21:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-15 19:21:59,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 19:21:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:21:59,712 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:21:59,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:21:59,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739762033] [2023-02-15 19:21:59,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739762033] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:21:59,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305687702] [2023-02-15 19:21:59,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:21:59,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:21:59,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:21:59,714 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) [2023-02-15 19:21:59,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 19:21:59,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:21:59,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:21:59,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 19:21:59,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:21:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:21:59,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:22:00,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305687702] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:00,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:00,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-02-15 19:22:00,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627038079] [2023-02-15 19:22:00,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:00,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 19:22:00,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:00,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 19:22:00,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2023-02-15 19:22:00,343 INFO L87 Difference]: Start difference. First operand 168 states and 247 transitions. Second operand has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 19:22:26,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:26,174 INFO L93 Difference]: Finished difference Result 421 states and 630 transitions. [2023-02-15 19:22:26,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 19:22:26,175 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2023-02-15 19:22:26,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:26,176 INFO L225 Difference]: With dead ends: 421 [2023-02-15 19:22:26,176 INFO L226 Difference]: Without dead ends: 260 [2023-02-15 19:22:26,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 25.5s TimeCoverageRelationStatistics Valid=498, Invalid=902, Unknown=6, NotChecked=0, Total=1406 [2023-02-15 19:22:26,178 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 283 mSDsluCounter, 942 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:26,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 1058 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 19:22:26,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-15 19:22:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 173. [2023-02-15 19:22:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 161 states have (on average 1.453416149068323) internal successors, (234), 162 states have internal predecessors, (234), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 19:22:26,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 255 transitions. [2023-02-15 19:22:26,203 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 255 transitions. Word has length 70 [2023-02-15 19:22:26,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:26,203 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 255 transitions. [2023-02-15 19:22:26,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.44) internal successors, (111), 25 states have internal predecessors, (111), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 19:22:26,204 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 255 transitions. [2023-02-15 19:22:26,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-15 19:22:26,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:26,206 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:22:26,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:26,406 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 [2023-02-15 19:22:26,407 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:26,407 INFO L85 PathProgramCache]: Analyzing trace with hash 270194017, now seen corresponding path program 2 times [2023-02-15 19:22:26,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:26,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603015349] [2023-02-15 19:22:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:26,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:26,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:26,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-02-15 19:22:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2023-02-15 19:22:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:26,636 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:22:26,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603015349] [2023-02-15 19:22:26,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603015349] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:26,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908904980] [2023-02-15 19:22:26,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 19:22:26,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:26,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:26,638 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) [2023-02-15 19:22:26,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 19:22:26,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 19:22:26,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:22:26,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 19:22:26,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:22:26,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:27,134 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:22:27,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908904980] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:27,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:27,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2023-02-15 19:22:27,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468911400] [2023-02-15 19:22:27,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:27,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 19:22:27,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:27,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 19:22:27,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 19:22:27,138 INFO L87 Difference]: Start difference. First operand 173 states and 255 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 19:22:27,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:22:27,505 INFO L93 Difference]: Finished difference Result 658 states and 1022 transitions. [2023-02-15 19:22:27,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 19:22:27,506 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 80 [2023-02-15 19:22:27,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:22:27,508 INFO L225 Difference]: With dead ends: 658 [2023-02-15 19:22:27,508 INFO L226 Difference]: Without dead ends: 492 [2023-02-15 19:22:27,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1020, Invalid=1632, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 19:22:27,510 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 831 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 19:22:27,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 845 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 19:22:27,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2023-02-15 19:22:27,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 204. [2023-02-15 19:22:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 192 states have (on average 1.4895833333333333) internal successors, (286), 193 states have internal predecessors, (286), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 19:22:27,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 307 transitions. [2023-02-15 19:22:27,525 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 307 transitions. Word has length 80 [2023-02-15 19:22:27,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:22:27,525 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 307 transitions. [2023-02-15 19:22:27,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 19:22:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 307 transitions. [2023-02-15 19:22:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-15 19:22:27,526 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:22:27,526 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:22:27,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 19:22:27,731 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 [2023-02-15 19:22:27,731 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:22:27,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:22:27,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1417933553, now seen corresponding path program 3 times [2023-02-15 19:22:27,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:22:27,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472033116] [2023-02-15 19:22:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:22:27,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:22:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:27,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:22:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:27,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:22:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:28,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-02-15 19:22:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:28,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2023-02-15 19:22:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:22:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 282 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:22:28,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:22:28,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472033116] [2023-02-15 19:22:28,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472033116] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:22:28,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113924128] [2023-02-15 19:22:28,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 19:22:28,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:22:28,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:22:28,246 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) [2023-02-15 19:22:28,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 19:22:28,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-02-15 19:22:28,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:22:28,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-15 19:22:28,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:22:29,011 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 25 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:22:29,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:22:29,662 INFO L134 CoverageAnalysis]: Checked inductivity of 304 backedges. 4 proven. 282 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:22:29,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113924128] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:22:29,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:22:29,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2023-02-15 19:22:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062575870] [2023-02-15 19:22:29,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:22:29,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 19:22:29,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:22:29,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 19:22:29,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 19:22:29,664 INFO L87 Difference]: Start difference. First operand 204 states and 307 transitions. Second operand has 49 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 49 states have internal predecessors, (183), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 19:23:09,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:23:09,353 INFO L93 Difference]: Finished difference Result 545 states and 825 transitions. [2023-02-15 19:23:09,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-15 19:23:09,353 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 49 states have internal predecessors, (183), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 94 [2023-02-15 19:23:09,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:23:09,355 INFO L225 Difference]: With dead ends: 545 [2023-02-15 19:23:09,355 INFO L226 Difference]: Without dead ends: 348 [2023-02-15 19:23:09,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 39.1s TimeCoverageRelationStatistics Valid=1617, Invalid=3630, Unknown=9, NotChecked=0, Total=5256 [2023-02-15 19:23:09,357 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 503 mSDsluCounter, 2779 mSDsCounter, 0 mSdLazyCounter, 3322 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 2935 SdHoareTripleChecker+Invalid, 3333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 3322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 19:23:09,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 2935 Invalid, 3333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 3322 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 19:23:09,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-02-15 19:23:09,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 203. [2023-02-15 19:23:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 191 states have (on average 1.486910994764398) internal successors, (284), 192 states have internal predecessors, (284), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 19:23:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 305 transitions. [2023-02-15 19:23:09,382 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 305 transitions. Word has length 94 [2023-02-15 19:23:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:23:09,382 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 305 transitions. [2023-02-15 19:23:09,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.7346938775510203) internal successors, (183), 49 states have internal predecessors, (183), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-15 19:23:09,382 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 305 transitions. [2023-02-15 19:23:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-15 19:23:09,383 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:23:09,383 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:23:09,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 19:23:09,589 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 [2023-02-15 19:23:09,589 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:23:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:23:09,590 INFO L85 PathProgramCache]: Analyzing trace with hash 870628449, now seen corresponding path program 3 times [2023-02-15 19:23:09,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:23:09,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739100173] [2023-02-15 19:23:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:23:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:23:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:09,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:23:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:09,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:23:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:10,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2023-02-15 19:23:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:10,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2023-02-15 19:23:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:23:10,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:23:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739100173] [2023-02-15 19:23:10,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739100173] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:23:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158183254] [2023-02-15 19:23:10,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 19:23:10,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:23:10,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:23:10,165 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) [2023-02-15 19:23:10,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 19:23:10,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2023-02-15 19:23:10,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:23:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 19:23:10,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:23:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 25 proven. 737 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 19:23:10,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:23:11,694 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 4 proven. 746 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-15 19:23:11,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158183254] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:23:11,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:23:11,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2023-02-15 19:23:11,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984827233] [2023-02-15 19:23:11,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:23:11,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-15 19:23:11,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:23:11,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-15 19:23:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=3556, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 19:23:11,697 INFO L87 Difference]: Start difference. First operand 203 states and 305 transitions. Second operand has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 19:23:12,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 19:23:12,805 INFO L93 Difference]: Finished difference Result 1060 states and 1686 transitions. [2023-02-15 19:23:12,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-15 19:23:12,806 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 116 [2023-02-15 19:23:12,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 19:23:12,809 INFO L225 Difference]: With dead ends: 1060 [2023-02-15 19:23:12,809 INFO L226 Difference]: Without dead ends: 864 [2023-02-15 19:23:12,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3768, Invalid=6132, Unknown=0, NotChecked=0, Total=9900 [2023-02-15 19:23:12,812 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 2652 mSDsluCounter, 1441 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2652 SdHoareTripleChecker+Valid, 1530 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 19:23:12,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2652 Valid, 1530 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 19:23:12,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2023-02-15 19:23:12,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 276. [2023-02-15 19:23:12,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 264 states have (on average 1.5378787878787878) internal successors, (406), 265 states have internal predecessors, (406), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-15 19:23:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 427 transitions. [2023-02-15 19:23:12,836 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 427 transitions. Word has length 116 [2023-02-15 19:23:12,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 19:23:12,836 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 427 transitions. [2023-02-15 19:23:12,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.445945945945946) internal successors, (255), 74 states have internal predecessors, (255), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 19:23:12,836 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 427 transitions. [2023-02-15 19:23:12,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-15 19:23:12,843 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 19:23:12,843 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 19:23:12,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 19:23:13,048 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 [2023-02-15 19:23:13,048 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 19:23:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 19:23:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1524595855, now seen corresponding path program 4 times [2023-02-15 19:23:13,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 19:23:13,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138441383] [2023-02-15 19:23:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 19:23:13,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 19:23:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 19:23:13,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:13,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-15 19:23:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:14,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-02-15 19:23:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:14,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-02-15 19:23:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 19:23:14,587 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:23:14,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 19:23:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138441383] [2023-02-15 19:23:14,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138441383] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 19:23:14,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33204143] [2023-02-15 19:23:14,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 19:23:14,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 19:23:14,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 19:23:14,601 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) [2023-02-15 19:23:14,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 19:23:14,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 19:23:14,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 19:23:14,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-15 19:23:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 19:23:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:23:15,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 19:23:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 10 proven. 837 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 19:23:18,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33204143] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 19:23:18,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 19:23:18,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36, 37] total 102 [2023-02-15 19:23:18,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087560766] [2023-02-15 19:23:18,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 19:23:18,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2023-02-15 19:23:18,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 19:23:18,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2023-02-15 19:23:18,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1504, Invalid=8798, Unknown=0, NotChecked=0, Total=10302 [2023-02-15 19:23:18,194 INFO L87 Difference]: Start difference. First operand 276 states and 427 transitions. Second operand has 102 states, 102 states have (on average 2.8627450980392157) internal successors, (292), 98 states have internal predecessors, (292), 4 states have call successors, (7), 2 states have call predecessors, (7), 6 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-15 19:24:27,343 WARN L233 SmtUtils]: Spent 47.48s on a formula simplification that was a NOOP. DAG size: 158 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 19:24:29,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 19:24:31,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-15 19:25:33,077 WARN L233 SmtUtils]: Spent 44.18s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 19:26:15,706 WARN L233 SmtUtils]: Spent 27.60s on a formula simplification that was a NOOP. DAG size: 152 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)