/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:41:24,376 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:41:24,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:41:24,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 01:41:24,411 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 01:41:24,413 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 01:41:24,415 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 01:41:24,417 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 01:41:24,418 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 01:41:24,422 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 01:41:24,423 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 01:41:24,424 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 01:41:24,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:41:24,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:41:24,427 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:41:24,428 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:41:24,429 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:41:24,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:41:24,431 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:41:24,434 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:41:24,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:41:24,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:41:24,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:41:24,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:41:24,444 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 01:41:24,444 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 01:41:24,444 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 01:41:24,445 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 01:41:24,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 01:41:24,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 01:41:24,446 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 01:41:24,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 01:41:24,447 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 01:41:24,448 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 01:41:24,448 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 01:41:24,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 01:41:24,449 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 01:41:24,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 01:41:24,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:41:24,450 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:41:24,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:41:24,451 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-03-31 01:41:24,474 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:41:24,474 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:41:24,474 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:41:24,474 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:41:24,475 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:41:24,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:41:24,476 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:41:24,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:41:24,476 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:41:24,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:41:24,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:41:24,477 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:41:24,478 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:41:24,478 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:41:24,479 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:41:24,479 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:41:24,479 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:41:24,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:41:24,691 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:41:24,695 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:41:24,696 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:41:24,696 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:41:24,697 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:41:25,683 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:41:26,001 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:41:26,001 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:41:26,010 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3528234ac/fda146f6da254653908929846fbde701/FLAGa627dfc42 [2023-03-31 01:41:26,021 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3528234ac/fda146f6da254653908929846fbde701 [2023-03-31 01:41:26,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:41:26,024 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:41:26,025 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:41:26,025 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:41:26,042 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:41:26,042 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,044 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4cc4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26, skipping insertion in model container [2023-03-31 01:41:26,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,049 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:41:26,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:41:26,253 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2023-03-31 01:41:26,296 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:41:26,321 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:41:26,402 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[7349,7362] [2023-03-31 01:41:26,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:41:26,490 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:41:26,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26 WrapperNode [2023-03-31 01:41:26,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:41:26,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:41:26,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:41:26,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:41:26,524 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,525 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,552 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,605 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,618 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,625 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:41:26,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:41:26,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:41:26,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:41:26,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (1/1) ... [2023-03-31 01:41:26,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:41:26,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:41:26,706 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) [2023-03-31 01:41:26,721 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 [2023-03-31 01:41:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:41:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:41:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:41:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 01:41:26,730 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:41:26,730 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-03-31 01:41:26,731 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:41:26,732 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:41:26,837 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:41:26,838 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:41:27,272 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:41:27,277 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:41:27,278 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:41:27,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:41:27 BoogieIcfgContainer [2023-03-31 01:41:27,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:41:27,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:41:27,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:41:27,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:41:27,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:41:26" (1/3) ... [2023-03-31 01:41:27,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db85c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:41:27, skipping insertion in model container [2023-03-31 01:41:27,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:41:26" (2/3) ... [2023-03-31 01:41:27,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7db85c79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:41:27, skipping insertion in model container [2023-03-31 01:41:27,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:41:27" (3/3) ... [2023-03-31 01:41:27,284 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2023-03-31 01:41:27,295 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:41:27,295 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:41:27,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:41:27,332 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;@51cd1d6c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:41:27,332 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:41:27,336 INFO L276 IsEmpty]: Start isEmpty. Operand has 151 states, 139 states have (on average 1.7553956834532374) internal successors, (244), 146 states have internal predecessors, (244), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:41:27,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 01:41:27,343 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:27,344 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:27,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:27,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:27,347 INFO L85 PathProgramCache]: Analyzing trace with hash 102107205, now seen corresponding path program 1 times [2023-03-31 01:41:27,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:27,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652978211] [2023-03-31 01:41:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:27,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:27,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:27,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:27,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:27,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652978211] [2023-03-31 01:41:27,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652978211] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:27,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:27,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:27,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800441524] [2023-03-31 01:41:27,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:27,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:27,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:27,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:27,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:27,913 INFO L87 Difference]: Start difference. First operand has 151 states, 139 states have (on average 1.7553956834532374) internal successors, (244), 146 states have internal predecessors, (244), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:28,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:28,686 INFO L93 Difference]: Finished difference Result 326 states and 519 transitions. [2023-03-31 01:41:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:28,692 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-03-31 01:41:28,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:28,699 INFO L225 Difference]: With dead ends: 326 [2023-03-31 01:41:28,699 INFO L226 Difference]: Without dead ends: 214 [2023-03-31 01:41:28,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:28,704 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 142 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:28,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 429 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:41:28,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-03-31 01:41:28,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2023-03-31 01:41:28,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 207 states have (on average 1.5265700483091786) internal successors, (316), 207 states have internal predecessors, (316), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 319 transitions. [2023-03-31 01:41:28,769 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 319 transitions. Word has length 60 [2023-03-31 01:41:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:28,770 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 319 transitions. [2023-03-31 01:41:28,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:28,770 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 319 transitions. [2023-03-31 01:41:28,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-03-31 01:41:28,771 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:28,771 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:28,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:41:28,772 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:28,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:28,772 INFO L85 PathProgramCache]: Analyzing trace with hash 699216594, now seen corresponding path program 1 times [2023-03-31 01:41:28,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:28,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130853025] [2023-03-31 01:41:28,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:28,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:28,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:28,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:28,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:28,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130853025] [2023-03-31 01:41:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130853025] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:28,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:28,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:28,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638125585] [2023-03-31 01:41:28,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:28,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:28,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:28,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:28,994 INFO L87 Difference]: Start difference. First operand 211 states and 319 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:29,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:29,487 INFO L93 Difference]: Finished difference Result 503 states and 779 transitions. [2023-03-31 01:41:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-03-31 01:41:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:29,492 INFO L225 Difference]: With dead ends: 503 [2023-03-31 01:41:29,492 INFO L226 Difference]: Without dead ends: 350 [2023-03-31 01:41:29,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:29,496 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 113 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:29,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 379 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:29,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2023-03-31 01:41:29,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 346. [2023-03-31 01:41:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 342 states have (on average 1.5380116959064327) internal successors, (526), 342 states have internal predecessors, (526), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:29,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 529 transitions. [2023-03-31 01:41:29,542 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 529 transitions. Word has length 62 [2023-03-31 01:41:29,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:29,542 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 529 transitions. [2023-03-31 01:41:29,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:29,543 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 529 transitions. [2023-03-31 01:41:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-31 01:41:29,550 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:29,550 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-31 01:41:29,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:41:29,550 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:29,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:29,551 INFO L85 PathProgramCache]: Analyzing trace with hash -552940955, now seen corresponding path program 1 times [2023-03-31 01:41:29,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:29,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953512881] [2023-03-31 01:41:29,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:29,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:29,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:29,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:29,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953512881] [2023-03-31 01:41:29,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953512881] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:29,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:29,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:29,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45741201] [2023-03-31 01:41:29,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:29,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:29,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:29,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:29,872 INFO L87 Difference]: Start difference. First operand 346 states and 529 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:30,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:30,314 INFO L93 Difference]: Finished difference Result 894 states and 1383 transitions. [2023-03-31 01:41:30,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:30,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-03-31 01:41:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:30,319 INFO L225 Difference]: With dead ends: 894 [2023-03-31 01:41:30,319 INFO L226 Difference]: Without dead ends: 606 [2023-03-31 01:41:30,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:30,328 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 108 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:30,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 380 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2023-03-31 01:41:30,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 600. [2023-03-31 01:41:30,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 596 states have (on average 1.5335570469798658) internal successors, (914), 596 states have internal predecessors, (914), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:30,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 917 transitions. [2023-03-31 01:41:30,385 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 917 transitions. Word has length 64 [2023-03-31 01:41:30,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:30,386 INFO L495 AbstractCegarLoop]: Abstraction has 600 states and 917 transitions. [2023-03-31 01:41:30,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 3 states have internal predecessors, (61), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:30,386 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 917 transitions. [2023-03-31 01:41:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-03-31 01:41:30,387 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:30,388 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-31 01:41:30,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:41:30,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:30,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1841118542, now seen corresponding path program 1 times [2023-03-31 01:41:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:30,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651536015] [2023-03-31 01:41:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:30,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:30,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:30,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:30,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:30,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651536015] [2023-03-31 01:41:30,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651536015] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:30,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:30,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:30,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891416799] [2023-03-31 01:41:30,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:30,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:30,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:30,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:30,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:30,728 INFO L87 Difference]: Start difference. First operand 600 states and 917 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:31,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:31,368 INFO L93 Difference]: Finished difference Result 2570 states and 4023 transitions. [2023-03-31 01:41:31,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:41:31,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2023-03-31 01:41:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:31,377 INFO L225 Difference]: With dead ends: 2570 [2023-03-31 01:41:31,377 INFO L226 Difference]: Without dead ends: 2018 [2023-03-31 01:41:31,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-31 01:41:31,380 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 891 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 891 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:31,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [891 Valid, 1346 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:31,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2018 states. [2023-03-31 01:41:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2018 to 1053. [2023-03-31 01:41:31,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1049 states have (on average 1.5548141086749285) internal successors, (1631), 1049 states have internal predecessors, (1631), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 1634 transitions. [2023-03-31 01:41:31,508 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 1634 transitions. Word has length 66 [2023-03-31 01:41:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:31,509 INFO L495 AbstractCegarLoop]: Abstraction has 1053 states and 1634 transitions. [2023-03-31 01:41:31,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:31,509 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 1634 transitions. [2023-03-31 01:41:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-31 01:41:31,510 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:31,510 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-31 01:41:31,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:41:31,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:31,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1301710404, now seen corresponding path program 1 times [2023-03-31 01:41:31,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:31,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420385931] [2023-03-31 01:41:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:31,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:31,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:31,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:31,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:31,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420385931] [2023-03-31 01:41:31,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420385931] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:31,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:31,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:41:31,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431207137] [2023-03-31 01:41:31,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:31,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:41:31,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:31,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:41:31,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:31,718 INFO L87 Difference]: Start difference. First operand 1053 states and 1634 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:32,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:32,284 INFO L93 Difference]: Finished difference Result 3062 states and 4806 transitions. [2023-03-31 01:41:32,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:41:32,284 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2023-03-31 01:41:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:32,291 INFO L225 Difference]: With dead ends: 3062 [2023-03-31 01:41:32,291 INFO L226 Difference]: Without dead ends: 2067 [2023-03-31 01:41:32,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:41:32,296 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 380 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:32,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 626 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:32,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2067 states. [2023-03-31 01:41:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2067 to 1548. [2023-03-31 01:41:32,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1548 states, 1544 states have (on average 1.5582901554404145) internal successors, (2406), 1544 states have internal predecessors, (2406), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:32,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 2409 transitions. [2023-03-31 01:41:32,404 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 2409 transitions. Word has length 67 [2023-03-31 01:41:32,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:32,404 INFO L495 AbstractCegarLoop]: Abstraction has 1548 states and 2409 transitions. [2023-03-31 01:41:32,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 4 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:32,405 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 2409 transitions. [2023-03-31 01:41:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-03-31 01:41:32,406 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:32,406 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-31 01:41:32,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 01:41:32,406 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:32,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:32,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1113556892, now seen corresponding path program 1 times [2023-03-31 01:41:32,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:32,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731577975] [2023-03-31 01:41:32,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:32,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:32,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:32,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:32,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731577975] [2023-03-31 01:41:32,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731577975] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:32,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:32,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:32,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822816709] [2023-03-31 01:41:32,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:32,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:32,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:32,565 INFO L87 Difference]: Start difference. First operand 1548 states and 2409 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:33,393 INFO L93 Difference]: Finished difference Result 3378 states and 5281 transitions. [2023-03-31 01:41:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:33,394 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-03-31 01:41:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:33,404 INFO L225 Difference]: With dead ends: 3378 [2023-03-31 01:41:33,404 INFO L226 Difference]: Without dead ends: 2309 [2023-03-31 01:41:33,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:33,408 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 117 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:33,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 473 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:41:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2023-03-31 01:41:33,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2307. [2023-03-31 01:41:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2307 states, 2303 states have (on average 1.5501519756838906) internal successors, (3570), 2303 states have internal predecessors, (3570), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:33,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2307 states to 2307 states and 3573 transitions. [2023-03-31 01:41:33,632 INFO L78 Accepts]: Start accepts. Automaton has 2307 states and 3573 transitions. Word has length 69 [2023-03-31 01:41:33,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:33,632 INFO L495 AbstractCegarLoop]: Abstraction has 2307 states and 3573 transitions. [2023-03-31 01:41:33,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2307 states and 3573 transitions. [2023-03-31 01:41:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-03-31 01:41:33,633 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:33,633 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-31 01:41:33,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 01:41:33,634 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:33,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1805222442, now seen corresponding path program 1 times [2023-03-31 01:41:33,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:33,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053612450] [2023-03-31 01:41:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:33,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:33,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:33,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:33,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:33,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053612450] [2023-03-31 01:41:33,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053612450] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:33,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:33,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:33,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127461978] [2023-03-31 01:41:33,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:33,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:33,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:33,790 INFO L87 Difference]: Start difference. First operand 2307 states and 3573 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:34,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:34,469 INFO L93 Difference]: Finished difference Result 4488 states and 6978 transitions. [2023-03-31 01:41:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:34,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-03-31 01:41:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:34,480 INFO L225 Difference]: With dead ends: 4488 [2023-03-31 01:41:34,480 INFO L226 Difference]: Without dead ends: 3205 [2023-03-31 01:41:34,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:34,486 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 107 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:34,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 426 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2023-03-31 01:41:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 3203. [2023-03-31 01:41:34,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3199 states have (on average 1.5401688027508595) internal successors, (4927), 3199 states have internal predecessors, (4927), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:34,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4930 transitions. [2023-03-31 01:41:34,733 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4930 transitions. Word has length 69 [2023-03-31 01:41:34,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:34,734 INFO L495 AbstractCegarLoop]: Abstraction has 3203 states and 4930 transitions. [2023-03-31 01:41:34,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:34,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4930 transitions. [2023-03-31 01:41:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-03-31 01:41:34,737 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:34,737 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-31 01:41:34,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 01:41:34,737 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:34,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:34,737 INFO L85 PathProgramCache]: Analyzing trace with hash 782221251, now seen corresponding path program 1 times [2023-03-31 01:41:34,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:34,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147229280] [2023-03-31 01:41:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:34,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:34,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:34,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147229280] [2023-03-31 01:41:34,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147229280] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:34,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:34,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:34,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156806643] [2023-03-31 01:41:34,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:34,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:34,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:34,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:34,931 INFO L87 Difference]: Start difference. First operand 3203 states and 4930 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:35,752 INFO L93 Difference]: Finished difference Result 6071 states and 9382 transitions. [2023-03-31 01:41:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:35,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2023-03-31 01:41:35,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:35,765 INFO L225 Difference]: With dead ends: 6071 [2023-03-31 01:41:35,765 INFO L226 Difference]: Without dead ends: 4310 [2023-03-31 01:41:35,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:35,770 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 112 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:35,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 460 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:35,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2023-03-31 01:41:36,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4308. [2023-03-31 01:41:36,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4308 states, 4304 states have (on average 1.528345724907063) internal successors, (6578), 4304 states have internal predecessors, (6578), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:36,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4308 states to 4308 states and 6581 transitions. [2023-03-31 01:41:36,130 INFO L78 Accepts]: Start accepts. Automaton has 4308 states and 6581 transitions. Word has length 69 [2023-03-31 01:41:36,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:36,130 INFO L495 AbstractCegarLoop]: Abstraction has 4308 states and 6581 transitions. [2023-03-31 01:41:36,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 3 states have internal predecessors, (66), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:36,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4308 states and 6581 transitions. [2023-03-31 01:41:36,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-03-31 01:41:36,131 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:36,131 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2023-03-31 01:41:36,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 01:41:36,131 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:36,131 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash -290124720, now seen corresponding path program 1 times [2023-03-31 01:41:36,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:36,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544831093] [2023-03-31 01:41:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:36,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:36,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:36,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:36,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:36,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:36,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544831093] [2023-03-31 01:41:36,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544831093] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:36,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:36,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:36,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412202906] [2023-03-31 01:41:36,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:36,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:36,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:36,559 INFO L87 Difference]: Start difference. First operand 4308 states and 6581 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:37,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:37,545 INFO L93 Difference]: Finished difference Result 7213 states and 10940 transitions. [2023-03-31 01:41:37,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:37,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2023-03-31 01:41:37,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:37,571 INFO L225 Difference]: With dead ends: 7213 [2023-03-31 01:41:37,572 INFO L226 Difference]: Without dead ends: 7211 [2023-03-31 01:41:37,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:41:37,576 INFO L413 NwaCegarLoop]: 278 mSDtfsCounter, 242 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:37,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 968 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:41:37,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7211 states. [2023-03-31 01:41:38,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7211 to 4412. [2023-03-31 01:41:38,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4408 states have (on average 1.5097549909255898) internal successors, (6655), 4408 states have internal predecessors, (6655), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 6658 transitions. [2023-03-31 01:41:38,044 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 6658 transitions. Word has length 75 [2023-03-31 01:41:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:38,044 INFO L495 AbstractCegarLoop]: Abstraction has 4412 states and 6658 transitions. [2023-03-31 01:41:38,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 5 states have internal predecessors, (72), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 6658 transitions. [2023-03-31 01:41:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 01:41:38,047 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:38,047 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-03-31 01:41:38,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 01:41:38,048 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:38,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:38,048 INFO L85 PathProgramCache]: Analyzing trace with hash -229295874, now seen corresponding path program 1 times [2023-03-31 01:41:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:38,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446442799] [2023-03-31 01:41:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:38,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:38,313 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 01:41:38,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:38,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446442799] [2023-03-31 01:41:38,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446442799] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:38,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:38,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:38,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489467298] [2023-03-31 01:41:38,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:38,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:38,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:38,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:38,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:38,315 INFO L87 Difference]: Start difference. First operand 4412 states and 6658 transitions. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:39,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:39,756 INFO L93 Difference]: Finished difference Result 11913 states and 18062 transitions. [2023-03-31 01:41:39,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:39,766 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2023-03-31 01:41:39,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:39,856 INFO L225 Difference]: With dead ends: 11913 [2023-03-31 01:41:39,857 INFO L226 Difference]: Without dead ends: 10069 [2023-03-31 01:41:39,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:39,862 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 475 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 475 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:39,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [475 Valid, 869 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10069 states. [2023-03-31 01:41:40,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10069 to 7218. [2023-03-31 01:41:40,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7214 states have (on average 1.5066537288605488) internal successors, (10869), 7214 states have internal predecessors, (10869), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 10872 transitions. [2023-03-31 01:41:40,657 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 10872 transitions. Word has length 97 [2023-03-31 01:41:40,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:40,657 INFO L495 AbstractCegarLoop]: Abstraction has 7218 states and 10872 transitions. [2023-03-31 01:41:40,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 5 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:40,658 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 10872 transitions. [2023-03-31 01:41:40,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 01:41:40,659 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:40,659 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-03-31 01:41:40,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 01:41:40,659 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:40,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:40,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1146892088, now seen corresponding path program 1 times [2023-03-31 01:41:40,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:40,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547846611] [2023-03-31 01:41:40,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:40,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:40,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 01:41:40,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:40,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547846611] [2023-03-31 01:41:40,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547846611] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:40,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:40,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:40,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829086933] [2023-03-31 01:41:40,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:40,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:40,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:40,909 INFO L87 Difference]: Start difference. First operand 7218 states and 10872 transitions. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:42,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:42,642 INFO L93 Difference]: Finished difference Result 14365 states and 21776 transitions. [2023-03-31 01:41:42,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2023-03-31 01:41:42,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:42,668 INFO L225 Difference]: With dead ends: 14365 [2023-03-31 01:41:42,668 INFO L226 Difference]: Without dead ends: 11427 [2023-03-31 01:41:42,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:42,676 INFO L413 NwaCegarLoop]: 331 mSDtfsCounter, 483 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 981 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:42,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 981 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:41:42,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11427 states. [2023-03-31 01:41:43,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11427 to 10204. [2023-03-31 01:41:43,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10204 states, 10200 states have (on average 1.509313725490196) internal successors, (15395), 10200 states have internal predecessors, (15395), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:43,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10204 states to 10204 states and 15398 transitions. [2023-03-31 01:41:43,699 INFO L78 Accepts]: Start accepts. Automaton has 10204 states and 15398 transitions. Word has length 97 [2023-03-31 01:41:43,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:43,699 INFO L495 AbstractCegarLoop]: Abstraction has 10204 states and 15398 transitions. [2023-03-31 01:41:43,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 5 states have internal predecessors, (84), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:43,699 INFO L276 IsEmpty]: Start isEmpty. Operand 10204 states and 15398 transitions. [2023-03-31 01:41:43,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-03-31 01:41:43,700 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:43,700 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-03-31 01:41:43,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 01:41:43,701 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:43,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:43,701 INFO L85 PathProgramCache]: Analyzing trace with hash -560631515, now seen corresponding path program 1 times [2023-03-31 01:41:43,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:43,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488889036] [2023-03-31 01:41:43,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:43,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:43,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 01:41:43,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:43,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488889036] [2023-03-31 01:41:43,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488889036] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:43,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:43,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175002184] [2023-03-31 01:41:43,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:43,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:43,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:43,938 INFO L87 Difference]: Start difference. First operand 10204 states and 15398 transitions. Second operand has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:45,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:45,919 INFO L93 Difference]: Finished difference Result 16051 states and 24337 transitions. [2023-03-31 01:41:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:45,919 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2023-03-31 01:41:45,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:45,943 INFO L225 Difference]: With dead ends: 16051 [2023-03-31 01:41:45,943 INFO L226 Difference]: Without dead ends: 13113 [2023-03-31 01:41:45,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:45,954 INFO L413 NwaCegarLoop]: 330 mSDtfsCounter, 480 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 934 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:45,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 934 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:41:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13113 states. [2023-03-31 01:41:46,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13113 to 12269. [2023-03-31 01:41:47,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12269 states, 12265 states have (on average 1.5107215654300856) internal successors, (18529), 12265 states have internal predecessors, (18529), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12269 states to 12269 states and 18532 transitions. [2023-03-31 01:41:47,040 INFO L78 Accepts]: Start accepts. Automaton has 12269 states and 18532 transitions. Word has length 97 [2023-03-31 01:41:47,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:47,040 INFO L495 AbstractCegarLoop]: Abstraction has 12269 states and 18532 transitions. [2023-03-31 01:41:47,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.833333333333334) internal successors, (89), 5 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:47,040 INFO L276 IsEmpty]: Start isEmpty. Operand 12269 states and 18532 transitions. [2023-03-31 01:41:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:41:47,043 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:47,043 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-03-31 01:41:47,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 01:41:47,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:47,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:47,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1183128265, now seen corresponding path program 1 times [2023-03-31 01:41:47,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:47,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116229763] [2023-03-31 01:41:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:47,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:47,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:47,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 01:41:47,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:47,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116229763] [2023-03-31 01:41:47,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116229763] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:47,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:47,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:47,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568431996] [2023-03-31 01:41:47,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:47,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:47,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:47,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:47,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:47,229 INFO L87 Difference]: Start difference. First operand 12269 states and 18532 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:49,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:49,534 INFO L93 Difference]: Finished difference Result 26515 states and 40234 transitions. [2023-03-31 01:41:49,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:49,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-03-31 01:41:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:49,568 INFO L225 Difference]: With dead ends: 26515 [2023-03-31 01:41:49,568 INFO L226 Difference]: Without dead ends: 19710 [2023-03-31 01:41:49,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:49,583 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 98 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:49,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 371 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:49,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19710 states. [2023-03-31 01:41:51,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19710 to 19658. [2023-03-31 01:41:51,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19658 states, 19654 states have (on average 1.512058614022591) internal successors, (29718), 19654 states have internal predecessors, (29718), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19658 states to 19658 states and 29721 transitions. [2023-03-31 01:41:51,416 INFO L78 Accepts]: Start accepts. Automaton has 19658 states and 29721 transitions. Word has length 98 [2023-03-31 01:41:51,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:51,416 INFO L495 AbstractCegarLoop]: Abstraction has 19658 states and 29721 transitions. [2023-03-31 01:41:51,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 3 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:51,417 INFO L276 IsEmpty]: Start isEmpty. Operand 19658 states and 29721 transitions. [2023-03-31 01:41:51,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-03-31 01:41:51,419 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:51,419 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-03-31 01:41:51,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 01:41:51,419 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:51,419 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1420152048, now seen corresponding path program 1 times [2023-03-31 01:41:51,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:51,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220914092] [2023-03-31 01:41:51,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:51,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:51,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 01:41:51,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:51,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220914092] [2023-03-31 01:41:51,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220914092] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:51,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:51,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:41:51,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217154852] [2023-03-31 01:41:51,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:51,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:41:51,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:51,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:41:51,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:51,626 INFO L87 Difference]: Start difference. First operand 19658 states and 29721 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:55,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:55,130 INFO L93 Difference]: Finished difference Result 33344 states and 50601 transitions. [2023-03-31 01:41:55,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:41:55,131 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2023-03-31 01:41:55,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:55,208 INFO L225 Difference]: With dead ends: 33344 [2023-03-31 01:41:55,209 INFO L226 Difference]: Without dead ends: 26427 [2023-03-31 01:41:55,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:55,225 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 214 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 715 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:55,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 715 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:55,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26427 states. [2023-03-31 01:41:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26427 to 24862. [2023-03-31 01:41:57,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24862 states, 24858 states have (on average 1.5097352964840294) internal successors, (37529), 24858 states have internal predecessors, (37529), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24862 states to 24862 states and 37532 transitions. [2023-03-31 01:41:57,660 INFO L78 Accepts]: Start accepts. Automaton has 24862 states and 37532 transitions. Word has length 98 [2023-03-31 01:41:57,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:57,662 INFO L495 AbstractCegarLoop]: Abstraction has 24862 states and 37532 transitions. [2023-03-31 01:41:57,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 4 states have internal predecessors, (95), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:57,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24862 states and 37532 transitions. [2023-03-31 01:41:57,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-03-31 01:41:57,665 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:57,666 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-03-31 01:41:57,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-03-31 01:41:57,666 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:57,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:57,666 INFO L85 PathProgramCache]: Analyzing trace with hash -638300554, now seen corresponding path program 1 times [2023-03-31 01:41:57,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:57,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78108336] [2023-03-31 01:41:57,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:57,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:57,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:57,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:57,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:57,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78108336] [2023-03-31 01:41:57,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78108336] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:57,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:57,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:57,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801624101] [2023-03-31 01:41:57,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:57,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:57,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:57,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:57,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:57,841 INFO L87 Difference]: Start difference. First operand 24862 states and 37532 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:42:03,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:42:03,019 INFO L93 Difference]: Finished difference Result 72996 states and 110103 transitions. [2023-03-31 01:42:03,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:42:03,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-03-31 01:42:03,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:42:03,098 INFO L225 Difference]: With dead ends: 72996 [2023-03-31 01:42:03,098 INFO L226 Difference]: Without dead ends: 48208 [2023-03-31 01:42:03,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:42:03,152 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 137 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:42:03,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 460 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:42:03,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48208 states. [2023-03-31 01:42:08,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48208 to 48206. [2023-03-31 01:42:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48206 states, 48202 states have (on average 1.4961412389527406) internal successors, (72117), 48202 states have internal predecessors, (72117), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:42:08,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48206 states to 48206 states and 72120 transitions. [2023-03-31 01:42:08,913 INFO L78 Accepts]: Start accepts. Automaton has 48206 states and 72120 transitions. Word has length 99 [2023-03-31 01:42:08,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:42:08,913 INFO L495 AbstractCegarLoop]: Abstraction has 48206 states and 72120 transitions. [2023-03-31 01:42:08,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:42:08,914 INFO L276 IsEmpty]: Start isEmpty. Operand 48206 states and 72120 transitions. [2023-03-31 01:42:08,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-03-31 01:42:08,917 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:42:08,917 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2023-03-31 01:42:08,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-03-31 01:42:08,917 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:42:08,917 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:42:08,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1252364756, now seen corresponding path program 1 times [2023-03-31 01:42:08,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:42:08,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005415917] [2023-03-31 01:42:08,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:42:08,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:42:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:42:09,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:42:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:42:09,092 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:42:09,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:42:09,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005415917] [2023-03-31 01:42:09,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005415917] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:42:09,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:42:09,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:42:09,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564770913] [2023-03-31 01:42:09,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:42:09,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:42:09,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:42:09,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:42:09,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:42:09,095 INFO L87 Difference]: Start difference. First operand 48206 states and 72120 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:42:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:42:19,891 INFO L93 Difference]: Finished difference Result 141486 states and 211455 transitions. [2023-03-31 01:42:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:42:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2023-03-31 01:42:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:42:20,040 INFO L225 Difference]: With dead ends: 141486 [2023-03-31 01:42:20,040 INFO L226 Difference]: Without dead ends: 93421 [2023-03-31 01:42:20,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:42:20,096 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 155 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:42:20,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 493 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:42:20,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93421 states. [2023-03-31 01:42:30,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93421 to 93419. [2023-03-31 01:42:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93419 states, 93415 states have (on average 1.481753465717497) internal successors, (138418), 93415 states have internal predecessors, (138418), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:42:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93419 states to 93419 states and 138421 transitions. [2023-03-31 01:42:30,780 INFO L78 Accepts]: Start accepts. Automaton has 93419 states and 138421 transitions. Word has length 99 [2023-03-31 01:42:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:42:30,780 INFO L495 AbstractCegarLoop]: Abstraction has 93419 states and 138421 transitions. [2023-03-31 01:42:30,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 3 states have internal predecessors, (96), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:42:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 93419 states and 138421 transitions. [2023-03-31 01:42:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-03-31 01:42:30,786 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:42:30,787 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:42:30,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-03-31 01:42:30,787 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:42:30,787 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:42:30,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1730489334, now seen corresponding path program 1 times [2023-03-31 01:42:30,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:42:30,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638496672] [2023-03-31 01:42:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:42:30,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:42:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:42:30,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:42:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:42:31,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:42:31,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:42:31,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638496672] [2023-03-31 01:42:31,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638496672] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:42:31,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:42:31,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:42:31,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045393273] [2023-03-31 01:42:31,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:42:31,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:42:31,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:42:31,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:42:31,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:42:31,007 INFO L87 Difference]: Start difference. First operand 93419 states and 138421 transitions. Second operand has 4 states, 4 states have (on average 24.25) internal successors, (97), 3 states have internal predecessors, (97), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)