/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/systemc/toy.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:25:59,394 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:25:59,397 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:25:59,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 01:25:59,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 01:25:59,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 01:25:59,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 01:25:59,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 01:25:59,446 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 01:25:59,451 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 01:25:59,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 01:25:59,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 01:25:59,454 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:25:59,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:25:59,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:25:59,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:25:59,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:25:59,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:25:59,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:25:59,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:25:59,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:25:59,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:25:59,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:25:59,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:25:59,479 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 01:25:59,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 01:25:59,480 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 01:25:59,481 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 01:25:59,482 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 01:25:59,482 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 01:25:59,482 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 01:25:59,483 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 01:25:59,484 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 01:25:59,485 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 01:25:59,485 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 01:25:59,486 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 01:25:59,486 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 01:25:59,486 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 01:25:59,486 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:25:59,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:25:59,488 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:25:59,489 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 01:25:59,517 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:25:59,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:25:59,518 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:25:59,518 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:25:59,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:25:59,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:25:59,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:25:59,520 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:25:59,520 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:25:59,521 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:25:59,522 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:25:59,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:25:59,522 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:25:59,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:25:59,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:25:59,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:25:59,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:25:59,523 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:25:59,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:25:59,523 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:25:59,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:25:59,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:25:59,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:25:59,523 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:25:59,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:25:59,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:25:59,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:25:59,524 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:25:59,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:25:59,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:25:59,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:25:59,525 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:25:59,525 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:25:59,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:25:59,525 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:25:59,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:25:59,756 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:25:59,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:25:59,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:25:59,783 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:25:59,784 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:25:59,785 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/toy.cil.c [2023-03-31 01:26:00,946 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:26:01,201 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:26:01,203 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/toy.cil.c [2023-03-31 01:26:01,214 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/269da18a6/4ba0800a8ecb4b75973be25bb30a37c9/FLAGc4d5e312b [2023-03-31 01:26:01,232 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/269da18a6/4ba0800a8ecb4b75973be25bb30a37c9 [2023-03-31 01:26:01,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:26:01,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:26:01,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:26:01,238 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:26:01,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:26:01,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40294921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01, skipping insertion in model container [2023-03-31 01:26:01,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:26:01,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:26:01,406 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/systemc/toy.cil.c[697,710] [2023-03-31 01:26:01,464 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:26:01,474 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:26:01,483 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/systemc/toy.cil.c[697,710] [2023-03-31 01:26:01,515 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:26:01,529 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:26:01,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01 WrapperNode [2023-03-31 01:26:01,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:26:01,530 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:26:01,530 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:26:01,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:26:01,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,565 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,576 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,577 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:26:01,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:26:01,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:26:01,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:26:01,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (1/1) ... [2023-03-31 01:26:01,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:26:01,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:26:01,617 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 01:26:01,639 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 01:26:01,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:26:01,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:26:01,665 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:26:01,665 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2023-03-31 01:26:01,665 INFO L138 BoogieDeclarations]: Found implementation of procedure write_loop [2023-03-31 01:26:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure compute1 [2023-03-31 01:26:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure compute2 [2023-03-31 01:26:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure write_back [2023-03-31 01:26:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure read [2023-03-31 01:26:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2023-03-31 01:26:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2023-03-31 01:26:01,666 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:26:01,666 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:26:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:26:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:26:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:26:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 01:26:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure error [2023-03-31 01:26:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure write_loop [2023-03-31 01:26:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure compute1 [2023-03-31 01:26:01,667 INFO L130 BoogieDeclarations]: Found specification of procedure compute2 [2023-03-31 01:26:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure write_back [2023-03-31 01:26:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:26:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2023-03-31 01:26:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2023-03-31 01:26:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:26:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:26:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:26:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:26:01,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:26:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:26:01,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:26:01,735 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:26:01,737 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:26:02,172 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:26:02,180 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:26:02,180 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-03-31 01:26:02,182 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:26:02 BoogieIcfgContainer [2023-03-31 01:26:02,182 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:26:02,184 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:26:02,184 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:26:02,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:26:02,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:26:01" (1/3) ... [2023-03-31 01:26:02,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afbb06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:26:02, skipping insertion in model container [2023-03-31 01:26:02,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:26:01" (2/3) ... [2023-03-31 01:26:02,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2afbb06c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:26:02, skipping insertion in model container [2023-03-31 01:26:02,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:26:02" (3/3) ... [2023-03-31 01:26:02,189 INFO L112 eAbstractionObserver]: Analyzing ICFG toy.cil.c [2023-03-31 01:26:02,204 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:26:02,205 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:26:02,250 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:26:02,256 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;@4e8c50d1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:26:02,256 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:26:02,262 INFO L276 IsEmpty]: Start isEmpty. Operand has 159 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 144 states have internal predecessors, (246), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-03-31 01:26:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:02,270 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:02,271 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] [2023-03-31 01:26:02,271 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:02,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:02,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1197321857, now seen corresponding path program 1 times [2023-03-31 01:26:02,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:02,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162830005] [2023-03-31 01:26:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:02,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:02,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:02,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:02,767 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 01:26:02,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:02,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162830005] [2023-03-31 01:26:02,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162830005] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:02,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:02,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:26:02,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640165439] [2023-03-31 01:26:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:02,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:26:02,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:26:02,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:26:02,836 INFO L87 Difference]: Start difference. First operand has 159 states, 137 states have (on average 1.7956204379562044) internal successors, (246), 144 states have internal predecessors, (246), 10 states have call successors, (10), 10 states have call predecessors, (10), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:03,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:03,514 INFO L93 Difference]: Finished difference Result 327 states and 565 transitions. [2023-03-31 01:26:03,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:26:03,517 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:03,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:03,531 INFO L225 Difference]: With dead ends: 327 [2023-03-31 01:26:03,531 INFO L226 Difference]: Without dead ends: 176 [2023-03-31 01:26:03,561 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 01:26:03,566 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 339 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:03,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 173 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:26:03,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-03-31 01:26:03,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 150. [2023-03-31 01:26:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 132 states have (on average 1.7121212121212122) internal successors, (226), 137 states have internal predecessors, (226), 10 states have call successors, (10), 10 states have call predecessors, (10), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 01:26:03,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 243 transitions. [2023-03-31 01:26:03,653 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 243 transitions. Word has length 47 [2023-03-31 01:26:03,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:03,654 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 243 transitions. [2023-03-31 01:26:03,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:03,655 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 243 transitions. [2023-03-31 01:26:03,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:03,658 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:03,658 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] [2023-03-31 01:26:03,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:26:03,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:03,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash -353316355, now seen corresponding path program 1 times [2023-03-31 01:26:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:03,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552772337] [2023-03-31 01:26:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:03,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:03,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:03,957 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 01:26:03,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:03,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552772337] [2023-03-31 01:26:03,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552772337] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:03,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:03,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:03,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503943659] [2023-03-31 01:26:03,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:03,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:03,962 INFO L87 Difference]: Start difference. First operand 150 states and 243 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:04,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:04,765 INFO L93 Difference]: Finished difference Result 446 states and 727 transitions. [2023-03-31 01:26:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:26:04,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:04,769 INFO L225 Difference]: With dead ends: 446 [2023-03-31 01:26:04,769 INFO L226 Difference]: Without dead ends: 305 [2023-03-31 01:26:04,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:26:04,772 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 799 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 800 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:04,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [800 Valid, 283 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:26:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-03-31 01:26:04,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 273. [2023-03-31 01:26:04,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 242 states have (on average 1.7066115702479339) internal successors, (413), 253 states have internal predecessors, (413), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2023-03-31 01:26:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 445 transitions. [2023-03-31 01:26:04,827 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 445 transitions. Word has length 47 [2023-03-31 01:26:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:04,828 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 445 transitions. [2023-03-31 01:26:04,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 445 transitions. [2023-03-31 01:26:04,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:04,829 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:04,829 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] [2023-03-31 01:26:04,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:26:04,830 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:04,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:04,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1697667643, now seen corresponding path program 1 times [2023-03-31 01:26:04,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:04,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403854897] [2023-03-31 01:26:04,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:04,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:05,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:05,037 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 01:26:05,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:05,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403854897] [2023-03-31 01:26:05,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403854897] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:05,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:05,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:26:05,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837884312] [2023-03-31 01:26:05,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:05,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:26:05,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:05,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:26:05,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:26:05,041 INFO L87 Difference]: Start difference. First operand 273 states and 445 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:05,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:05,522 INFO L93 Difference]: Finished difference Result 559 states and 914 transitions. [2023-03-31 01:26:05,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:26:05,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:05,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:05,525 INFO L225 Difference]: With dead ends: 559 [2023-03-31 01:26:05,525 INFO L226 Difference]: Without dead ends: 301 [2023-03-31 01:26:05,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:05,528 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 304 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:05,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 152 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:26:05,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-03-31 01:26:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 273. [2023-03-31 01:26:05,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 242 states have (on average 1.6570247933884297) internal successors, (401), 253 states have internal predecessors, (401), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2023-03-31 01:26:05,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 433 transitions. [2023-03-31 01:26:05,573 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 433 transitions. Word has length 47 [2023-03-31 01:26:05,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:05,573 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 433 transitions. [2023-03-31 01:26:05,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:05,573 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 433 transitions. [2023-03-31 01:26:05,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:05,575 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:05,575 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] [2023-03-31 01:26:05,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:26:05,575 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:05,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2047982911, now seen corresponding path program 1 times [2023-03-31 01:26:05,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:05,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362126350] [2023-03-31 01:26:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:05,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:05,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:05,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:05,759 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 01:26:05,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:05,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362126350] [2023-03-31 01:26:05,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362126350] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:05,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:05,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:05,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858691329] [2023-03-31 01:26:05,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:05,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:05,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:05,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:05,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:05,761 INFO L87 Difference]: Start difference. First operand 273 states and 433 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:06,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:06,692 INFO L93 Difference]: Finished difference Result 796 states and 1277 transitions. [2023-03-31 01:26:06,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:26:06,693 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:06,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:06,697 INFO L225 Difference]: With dead ends: 796 [2023-03-31 01:26:06,698 INFO L226 Difference]: Without dead ends: 539 [2023-03-31 01:26:06,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:26:06,707 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 526 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:06,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 281 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:26:06,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-03-31 01:26:06,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 273. [2023-03-31 01:26:06,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 242 states have (on average 1.6446280991735538) internal successors, (398), 253 states have internal predecessors, (398), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2023-03-31 01:26:06,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 430 transitions. [2023-03-31 01:26:06,766 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 430 transitions. Word has length 47 [2023-03-31 01:26:06,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:06,766 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 430 transitions. [2023-03-31 01:26:06,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 430 transitions. [2023-03-31 01:26:06,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:06,771 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:06,771 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] [2023-03-31 01:26:06,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:26:06,772 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:06,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:06,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1972224771, now seen corresponding path program 1 times [2023-03-31 01:26:06,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:06,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082910076] [2023-03-31 01:26:06,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:06,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:06,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:06,937 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 01:26:06,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:06,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082910076] [2023-03-31 01:26:06,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082910076] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:06,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:06,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:06,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047362968] [2023-03-31 01:26:06,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:06,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:06,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:06,940 INFO L87 Difference]: Start difference. First operand 273 states and 430 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:07,910 INFO L93 Difference]: Finished difference Result 803 states and 1275 transitions. [2023-03-31 01:26:07,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:26:07,911 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:07,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:07,915 INFO L225 Difference]: With dead ends: 803 [2023-03-31 01:26:07,915 INFO L226 Difference]: Without dead ends: 547 [2023-03-31 01:26:07,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:26:07,919 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 529 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:07,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [529 Valid, 286 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:26:07,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-03-31 01:26:07,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 273. [2023-03-31 01:26:07,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 242 states have (on average 1.6322314049586777) internal successors, (395), 253 states have internal predecessors, (395), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2023-03-31 01:26:07,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 427 transitions. [2023-03-31 01:26:07,974 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 427 transitions. Word has length 47 [2023-03-31 01:26:07,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:07,975 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 427 transitions. [2023-03-31 01:26:07,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:07,975 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 427 transitions. [2023-03-31 01:26:07,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:07,977 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:07,977 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] [2023-03-31 01:26:07,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 01:26:07,977 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:07,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:07,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1270624897, now seen corresponding path program 1 times [2023-03-31 01:26:07,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:07,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550715550] [2023-03-31 01:26:07,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:07,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:08,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:08,134 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 01:26:08,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:08,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550715550] [2023-03-31 01:26:08,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550715550] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:08,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:08,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:08,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693344332] [2023-03-31 01:26:08,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:08,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:08,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:08,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:08,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:08,136 INFO L87 Difference]: Start difference. First operand 273 states and 427 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:09,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:09,112 INFO L93 Difference]: Finished difference Result 819 states and 1288 transitions. [2023-03-31 01:26:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:26:09,113 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:09,115 INFO L225 Difference]: With dead ends: 819 [2023-03-31 01:26:09,116 INFO L226 Difference]: Without dead ends: 564 [2023-03-31 01:26:09,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:26:09,117 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 534 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:09,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [535 Valid, 296 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:26:09,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-03-31 01:26:09,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 279. [2023-03-31 01:26:09,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 248 states have (on average 1.6088709677419355) internal successors, (399), 259 states have internal predecessors, (399), 16 states have call successors, (16), 16 states have call predecessors, (16), 14 states have return successors, (16), 13 states have call predecessors, (16), 13 states have call successors, (16) [2023-03-31 01:26:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 431 transitions. [2023-03-31 01:26:09,167 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 431 transitions. Word has length 47 [2023-03-31 01:26:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:09,167 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 431 transitions. [2023-03-31 01:26:09,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 431 transitions. [2023-03-31 01:26:09,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:09,168 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:09,168 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] [2023-03-31 01:26:09,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 01:26:09,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:09,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:09,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1247992643, now seen corresponding path program 1 times [2023-03-31 01:26:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:09,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540012291] [2023-03-31 01:26:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:09,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:09,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:09,325 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 01:26:09,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:09,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540012291] [2023-03-31 01:26:09,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540012291] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:09,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:09,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:09,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110736998] [2023-03-31 01:26:09,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:09,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:09,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:09,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:09,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:09,327 INFO L87 Difference]: Start difference. First operand 279 states and 431 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:10,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:10,428 INFO L93 Difference]: Finished difference Result 1011 states and 1568 transitions. [2023-03-31 01:26:10,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:26:10,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:10,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:10,433 INFO L225 Difference]: With dead ends: 1011 [2023-03-31 01:26:10,433 INFO L226 Difference]: Without dead ends: 751 [2023-03-31 01:26:10,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:26:10,434 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 563 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:10,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 368 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 01:26:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-03-31 01:26:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 673. [2023-03-31 01:26:10,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 598 states have (on average 1.605351170568562) internal successors, (960), 629 states have internal predecessors, (960), 36 states have call successors, (36), 36 states have call predecessors, (36), 38 states have return successors, (54), 35 states have call predecessors, (54), 33 states have call successors, (54) [2023-03-31 01:26:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 1050 transitions. [2023-03-31 01:26:10,551 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 1050 transitions. Word has length 47 [2023-03-31 01:26:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:10,551 INFO L495 AbstractCegarLoop]: Abstraction has 673 states and 1050 transitions. [2023-03-31 01:26:10,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:10,551 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 1050 transitions. [2023-03-31 01:26:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:10,552 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:10,553 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] [2023-03-31 01:26:10,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 01:26:10,553 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:10,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:10,553 INFO L85 PathProgramCache]: Analyzing trace with hash 138210751, now seen corresponding path program 1 times [2023-03-31 01:26:10,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:10,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854114035] [2023-03-31 01:26:10,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:10,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:10,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:10,691 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 01:26:10,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:10,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854114035] [2023-03-31 01:26:10,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854114035] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:10,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:10,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:26:10,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277223471] [2023-03-31 01:26:10,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:10,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:26:10,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:10,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:26:10,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:26:10,693 INFO L87 Difference]: Start difference. First operand 673 states and 1050 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:11,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:11,437 INFO L93 Difference]: Finished difference Result 1707 states and 2649 transitions. [2023-03-31 01:26:11,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:26:11,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:11,442 INFO L225 Difference]: With dead ends: 1707 [2023-03-31 01:26:11,443 INFO L226 Difference]: Without dead ends: 1064 [2023-03-31 01:26:11,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:11,445 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 351 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:11,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 234 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:26:11,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2023-03-31 01:26:11,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 977. [2023-03-31 01:26:11,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 868 states have (on average 1.597926267281106) internal successors, (1387), 914 states have internal predecessors, (1387), 52 states have call successors, (52), 52 states have call predecessors, (52), 56 states have return successors, (76), 52 states have call predecessors, (76), 49 states have call successors, (76) [2023-03-31 01:26:11,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1515 transitions. [2023-03-31 01:26:11,640 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1515 transitions. Word has length 47 [2023-03-31 01:26:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:11,640 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 1515 transitions. [2023-03-31 01:26:11,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:11,641 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1515 transitions. [2023-03-31 01:26:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:11,642 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:11,642 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] [2023-03-31 01:26:11,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 01:26:11,642 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:11,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash 938795971, now seen corresponding path program 1 times [2023-03-31 01:26:11,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:11,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957338185] [2023-03-31 01:26:11,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:11,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:11,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:11,833 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 01:26:11,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:11,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957338185] [2023-03-31 01:26:11,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957338185] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:11,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:11,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:11,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069393086] [2023-03-31 01:26:11,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:11,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:11,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:11,836 INFO L87 Difference]: Start difference. First operand 977 states and 1515 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:12,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:12,838 INFO L93 Difference]: Finished difference Result 2650 states and 4111 transitions. [2023-03-31 01:26:12,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:26:12,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:12,846 INFO L225 Difference]: With dead ends: 2650 [2023-03-31 01:26:12,846 INFO L226 Difference]: Without dead ends: 1696 [2023-03-31 01:26:12,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:26:12,850 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 714 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:12,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 241 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:26:12,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2023-03-31 01:26:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 977. [2023-03-31 01:26:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 868 states have (on average 1.5817972350230414) internal successors, (1373), 914 states have internal predecessors, (1373), 52 states have call successors, (52), 52 states have call predecessors, (52), 56 states have return successors, (76), 52 states have call predecessors, (76), 49 states have call successors, (76) [2023-03-31 01:26:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1501 transitions. [2023-03-31 01:26:13,053 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1501 transitions. Word has length 47 [2023-03-31 01:26:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:13,054 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 1501 transitions. [2023-03-31 01:26:13,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:13,054 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1501 transitions. [2023-03-31 01:26:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:13,055 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:13,055 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] [2023-03-31 01:26:13,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 01:26:13,055 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:13,056 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1157650689, now seen corresponding path program 1 times [2023-03-31 01:26:13,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:13,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120441276] [2023-03-31 01:26:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:13,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:13,225 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 01:26:13,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:13,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120441276] [2023-03-31 01:26:13,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120441276] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:13,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:13,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:13,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231875474] [2023-03-31 01:26:13,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:13,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:13,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:13,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:13,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:13,227 INFO L87 Difference]: Start difference. First operand 977 states and 1501 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:14,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:14,229 INFO L93 Difference]: Finished difference Result 2635 states and 4063 transitions. [2023-03-31 01:26:14,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:26:14,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:14,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:14,237 INFO L225 Difference]: With dead ends: 2635 [2023-03-31 01:26:14,237 INFO L226 Difference]: Without dead ends: 1687 [2023-03-31 01:26:14,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:26:14,240 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 687 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 687 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:14,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [687 Valid, 235 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:26:14,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2023-03-31 01:26:14,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 977. [2023-03-31 01:26:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 868 states have (on average 1.5656682027649769) internal successors, (1359), 914 states have internal predecessors, (1359), 52 states have call successors, (52), 52 states have call predecessors, (52), 56 states have return successors, (76), 52 states have call predecessors, (76), 49 states have call successors, (76) [2023-03-31 01:26:14,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1487 transitions. [2023-03-31 01:26:14,448 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1487 transitions. Word has length 47 [2023-03-31 01:26:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:14,448 INFO L495 AbstractCegarLoop]: Abstraction has 977 states and 1487 transitions. [2023-03-31 01:26:14,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1487 transitions. [2023-03-31 01:26:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:14,453 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:14,453 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] [2023-03-31 01:26:14,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 01:26:14,454 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:14,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:14,454 INFO L85 PathProgramCache]: Analyzing trace with hash 340002239, now seen corresponding path program 1 times [2023-03-31 01:26:14,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:14,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387199724] [2023-03-31 01:26:14,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:14,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:14,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:14,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:14,623 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 01:26:14,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:14,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387199724] [2023-03-31 01:26:14,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387199724] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:14,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:14,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:14,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045467624] [2023-03-31 01:26:14,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:14,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:14,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:14,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:14,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:14,625 INFO L87 Difference]: Start difference. First operand 977 states and 1487 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:15,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:15,576 INFO L93 Difference]: Finished difference Result 2445 states and 3751 transitions. [2023-03-31 01:26:15,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:26:15,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:15,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:15,582 INFO L225 Difference]: With dead ends: 2445 [2023-03-31 01:26:15,582 INFO L226 Difference]: Without dead ends: 1491 [2023-03-31 01:26:15,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:26:15,586 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 678 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:15,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 261 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:26:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1491 states. [2023-03-31 01:26:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1491 to 1350. [2023-03-31 01:26:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1206 states have (on average 1.5348258706467661) internal successors, (1851), 1267 states have internal predecessors, (1851), 69 states have call successors, (69), 69 states have call predecessors, (69), 74 states have return successors, (100), 69 states have call predecessors, (100), 66 states have call successors, (100) [2023-03-31 01:26:15,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2020 transitions. [2023-03-31 01:26:15,836 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2020 transitions. Word has length 47 [2023-03-31 01:26:15,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:15,836 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2020 transitions. [2023-03-31 01:26:15,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 4 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:15,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2020 transitions. [2023-03-31 01:26:15,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 01:26:15,837 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:15,837 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] [2023-03-31 01:26:15,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 01:26:15,838 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:15,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:15,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1654142467, now seen corresponding path program 1 times [2023-03-31 01:26:15,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:15,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627571353] [2023-03-31 01:26:15,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:15,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:15,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:15,984 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 01:26:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627571353] [2023-03-31 01:26:15,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627571353] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:15,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:15,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:26:15,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890650809] [2023-03-31 01:26:15,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:15,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:26:15,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:15,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:26:15,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:26:15,986 INFO L87 Difference]: Start difference. First operand 1350 states and 2020 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:16,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:16,760 INFO L93 Difference]: Finished difference Result 2552 states and 3839 transitions. [2023-03-31 01:26:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:26:16,761 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2023-03-31 01:26:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:16,765 INFO L225 Difference]: With dead ends: 2552 [2023-03-31 01:26:16,765 INFO L226 Difference]: Without dead ends: 1222 [2023-03-31 01:26:16,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:16,769 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 274 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:16,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [274 Valid, 240 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:26:16,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2023-03-31 01:26:16,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1072. [2023-03-31 01:26:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 952 states have (on average 1.504201680672269) internal successors, (1432), 1000 states have internal predecessors, (1432), 60 states have call successors, (60), 60 states have call predecessors, (60), 59 states have return successors, (76), 57 states have call predecessors, (76), 57 states have call successors, (76) [2023-03-31 01:26:16,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1568 transitions. [2023-03-31 01:26:16,957 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1568 transitions. Word has length 47 [2023-03-31 01:26:16,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:16,957 INFO L495 AbstractCegarLoop]: Abstraction has 1072 states and 1568 transitions. [2023-03-31 01:26:16,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 3 states have internal predecessors, (40), 3 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:26:16,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1568 transitions. [2023-03-31 01:26:16,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-03-31 01:26:16,958 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:16,959 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:26:16,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 01:26:16,959 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:16,959 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:16,960 INFO L85 PathProgramCache]: Analyzing trace with hash -342770636, now seen corresponding path program 1 times [2023-03-31 01:26:16,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:16,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615318918] [2023-03-31 01:26:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:16,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:17,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:17,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-31 01:26:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:26:17,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:17,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615318918] [2023-03-31 01:26:17,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615318918] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:17,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:17,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:26:17,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189037390] [2023-03-31 01:26:17,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:17,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:26:17,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:17,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:26:17,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:26:17,135 INFO L87 Difference]: Start difference. First operand 1072 states and 1568 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:18,310 INFO L93 Difference]: Finished difference Result 3642 states and 5742 transitions. [2023-03-31 01:26:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:26:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2023-03-31 01:26:18,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:18,324 INFO L225 Difference]: With dead ends: 3642 [2023-03-31 01:26:18,324 INFO L226 Difference]: Without dead ends: 2603 [2023-03-31 01:26:18,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:26:18,329 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 368 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:18,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 402 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:26:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2603 states. [2023-03-31 01:26:18,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2603 to 1893. [2023-03-31 01:26:18,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1893 states, 1625 states have (on average 1.5329230769230768) internal successors, (2491), 1775 states have internal predecessors, (2491), 149 states have call successors, (149), 106 states have call predecessors, (149), 118 states have return successors, (232), 133 states have call predecessors, (232), 146 states have call successors, (232) [2023-03-31 01:26:18,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1893 states to 1893 states and 2872 transitions. [2023-03-31 01:26:18,709 INFO L78 Accepts]: Start accepts. Automaton has 1893 states and 2872 transitions. Word has length 61 [2023-03-31 01:26:18,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:18,710 INFO L495 AbstractCegarLoop]: Abstraction has 1893 states and 2872 transitions. [2023-03-31 01:26:18,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 4 states have internal predecessors, (52), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1893 states and 2872 transitions. [2023-03-31 01:26:18,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-03-31 01:26:18,712 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:18,712 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:26:18,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 01:26:18,712 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:18,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:18,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1923610550, now seen corresponding path program 1 times [2023-03-31 01:26:18,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:18,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873869441] [2023-03-31 01:26:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:18,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:18,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:18,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-31 01:26:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:18,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 01:26:18,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:18,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873869441] [2023-03-31 01:26:18,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873869441] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:18,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:18,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:18,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902845506] [2023-03-31 01:26:18,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:18,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:18,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:18,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:18,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:18,846 INFO L87 Difference]: Start difference. First operand 1893 states and 2872 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:19,844 INFO L93 Difference]: Finished difference Result 4266 states and 6572 transitions. [2023-03-31 01:26:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:26:19,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2023-03-31 01:26:19,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:19,858 INFO L225 Difference]: With dead ends: 4266 [2023-03-31 01:26:19,859 INFO L226 Difference]: Without dead ends: 2406 [2023-03-31 01:26:19,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:26:19,865 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 331 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:19,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 203 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:26:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2406 states. [2023-03-31 01:26:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2406 to 1871. [2023-03-31 01:26:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1603 states have (on average 1.537117903930131) internal successors, (2464), 1753 states have internal predecessors, (2464), 149 states have call successors, (149), 106 states have call predecessors, (149), 118 states have return successors, (232), 133 states have call predecessors, (232), 146 states have call successors, (232) [2023-03-31 01:26:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2845 transitions. [2023-03-31 01:26:20,359 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2845 transitions. Word has length 61 [2023-03-31 01:26:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:20,359 INFO L495 AbstractCegarLoop]: Abstraction has 1871 states and 2845 transitions. [2023-03-31 01:26:20,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2845 transitions. [2023-03-31 01:26:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-03-31 01:26:20,360 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:20,360 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:26:20,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-03-31 01:26:20,361 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:20,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1508841938, now seen corresponding path program 1 times [2023-03-31 01:26:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779692255] [2023-03-31 01:26:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:20,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:20,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:20,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:20,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:20,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-31 01:26:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:26:20,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:20,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779692255] [2023-03-31 01:26:20,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779692255] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:20,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:20,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:26:20,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271828124] [2023-03-31 01:26:20,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:20,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:26:20,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:20,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:26:20,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:26:20,518 INFO L87 Difference]: Start difference. First operand 1871 states and 2845 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:22,190 INFO L93 Difference]: Finished difference Result 6896 states and 11360 transitions. [2023-03-31 01:26:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:26:22,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2023-03-31 01:26:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:22,214 INFO L225 Difference]: With dead ends: 6896 [2023-03-31 01:26:22,214 INFO L226 Difference]: Without dead ends: 5058 [2023-03-31 01:26:22,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:26:22,225 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 382 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:22,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 410 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:26:22,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5058 states. [2023-03-31 01:26:23,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5058 to 3612. [2023-03-31 01:26:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3030 states have (on average 1.566996699669967) internal successors, (4748), 3418 states have internal predecessors, (4748), 351 states have call successors, (351), 182 states have call predecessors, (351), 230 states have return successors, (660), 309 states have call predecessors, (660), 348 states have call successors, (660) [2023-03-31 01:26:23,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 5759 transitions. [2023-03-31 01:26:23,166 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 5759 transitions. Word has length 62 [2023-03-31 01:26:23,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:23,167 INFO L495 AbstractCegarLoop]: Abstraction has 3612 states and 5759 transitions. [2023-03-31 01:26:23,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 4 states have internal predecessors, (53), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:23,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 5759 transitions. [2023-03-31 01:26:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-03-31 01:26:23,170 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:23,171 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:26:23,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-03-31 01:26:23,171 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:23,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash 757539248, now seen corresponding path program 1 times [2023-03-31 01:26:23,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:23,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559145629] [2023-03-31 01:26:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:23,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:23,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:23,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-31 01:26:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 01:26:23,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:23,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559145629] [2023-03-31 01:26:23,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559145629] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:23,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:23,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:23,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048963456] [2023-03-31 01:26:23,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:23,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:23,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:23,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:23,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:23,311 INFO L87 Difference]: Start difference. First operand 3612 states and 5759 transitions. Second operand has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:24,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:24,649 INFO L93 Difference]: Finished difference Result 8137 states and 13087 transitions. [2023-03-31 01:26:24,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:26:24,649 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2023-03-31 01:26:24,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:24,679 INFO L225 Difference]: With dead ends: 8137 [2023-03-31 01:26:24,680 INFO L226 Difference]: Without dead ends: 4562 [2023-03-31 01:26:24,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:26:24,692 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 328 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:24,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 203 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:26:24,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2023-03-31 01:26:25,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3591. [2023-03-31 01:26:25,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3591 states, 3009 states have (on average 1.569624459953473) internal successors, (4723), 3397 states have internal predecessors, (4723), 351 states have call successors, (351), 182 states have call predecessors, (351), 230 states have return successors, (660), 309 states have call predecessors, (660), 348 states have call successors, (660) [2023-03-31 01:26:25,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3591 states to 3591 states and 5734 transitions. [2023-03-31 01:26:25,454 INFO L78 Accepts]: Start accepts. Automaton has 3591 states and 5734 transitions. Word has length 62 [2023-03-31 01:26:25,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:25,454 INFO L495 AbstractCegarLoop]: Abstraction has 3591 states and 5734 transitions. [2023-03-31 01:26:25,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.8) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:25,454 INFO L276 IsEmpty]: Start isEmpty. Operand 3591 states and 5734 transitions. [2023-03-31 01:26:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-03-31 01:26:25,456 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:25,456 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:26:25,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-03-31 01:26:25,456 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:25,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:25,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1266194699, now seen corresponding path program 1 times [2023-03-31 01:26:25,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:25,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945904434] [2023-03-31 01:26:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:25,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:25,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:25,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-31 01:26:25,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:26:25,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:25,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945904434] [2023-03-31 01:26:25,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945904434] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:25,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:25,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:26:25,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628870252] [2023-03-31 01:26:25,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:25,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:26:25,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:25,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:26:25,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:26:25,598 INFO L87 Difference]: Start difference. First operand 3591 states and 5734 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:27,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:27,898 INFO L93 Difference]: Finished difference Result 11485 states and 18946 transitions. [2023-03-31 01:26:27,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:26:27,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2023-03-31 01:26:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:27,930 INFO L225 Difference]: With dead ends: 11485 [2023-03-31 01:26:27,931 INFO L226 Difference]: Without dead ends: 7931 [2023-03-31 01:26:27,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:26:27,951 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 278 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:27,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 298 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:26:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7931 states. [2023-03-31 01:26:29,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7931 to 6266. [2023-03-31 01:26:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6266 states, 5302 states have (on average 1.5767634854771784) internal successors, (8360), 5949 states have internal predecessors, (8360), 591 states have call successors, (591), 305 states have call predecessors, (591), 372 states have return successors, (1162), 515 states have call predecessors, (1162), 588 states have call successors, (1162) [2023-03-31 01:26:29,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6266 states to 6266 states and 10113 transitions. [2023-03-31 01:26:29,302 INFO L78 Accepts]: Start accepts. Automaton has 6266 states and 10113 transitions. Word has length 63 [2023-03-31 01:26:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:29,302 INFO L495 AbstractCegarLoop]: Abstraction has 6266 states and 10113 transitions. [2023-03-31 01:26:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:26:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 6266 states and 10113 transitions. [2023-03-31 01:26:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-03-31 01:26:29,304 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:29,304 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:26:29,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-03-31 01:26:29,305 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:29,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:29,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1749327725, now seen corresponding path program 1 times [2023-03-31 01:26:29,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:29,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645619742] [2023-03-31 01:26:29,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:29,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:29,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:29,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-31 01:26:29,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:26:29,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:29,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645619742] [2023-03-31 01:26:29,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645619742] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:29,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:29,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-31 01:26:29,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677921682] [2023-03-31 01:26:29,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:29,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 01:26:29,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:29,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 01:26:29,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:26:29,505 INFO L87 Difference]: Start difference. First operand 6266 states and 10113 transitions. Second operand has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 01:26:33,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:33,870 INFO L93 Difference]: Finished difference Result 23773 states and 39041 transitions. [2023-03-31 01:26:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-31 01:26:33,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 64 [2023-03-31 01:26:33,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:33,926 INFO L225 Difference]: With dead ends: 23773 [2023-03-31 01:26:33,927 INFO L226 Difference]: Without dead ends: 12127 [2023-03-31 01:26:33,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-03-31 01:26:33,983 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 906 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:33,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 514 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-03-31 01:26:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12127 states. [2023-03-31 01:26:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12127 to 10308. [2023-03-31 01:26:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10308 states, 8734 states have (on average 1.5282802839477903) internal successors, (13348), 9798 states have internal predecessors, (13348), 925 states have call successors, (925), 496 states have call predecessors, (925), 648 states have return successors, (2211), 890 states have call predecessors, (2211), 922 states have call successors, (2211) [2023-03-31 01:26:36,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10308 states to 10308 states and 16484 transitions. [2023-03-31 01:26:36,072 INFO L78 Accepts]: Start accepts. Automaton has 10308 states and 16484 transitions. Word has length 64 [2023-03-31 01:26:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:36,073 INFO L495 AbstractCegarLoop]: Abstraction has 10308 states and 16484 transitions. [2023-03-31 01:26:36,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.857142857142857) internal successors, (55), 5 states have internal predecessors, (55), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 01:26:36,074 INFO L276 IsEmpty]: Start isEmpty. Operand 10308 states and 16484 transitions. [2023-03-31 01:26:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-03-31 01:26:36,077 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:36,077 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:26:36,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-03-31 01:26:36,077 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:36,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:36,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1418749945, now seen corresponding path program 1 times [2023-03-31 01:26:36,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:36,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960391258] [2023-03-31 01:26:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:36,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:36,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:36,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:36,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-03-31 01:26:36,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:36,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-03-31 01:26:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:26:36,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960391258] [2023-03-31 01:26:36,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960391258] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:36,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:36,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-03-31 01:26:36,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655270229] [2023-03-31 01:26:36,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:36,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-31 01:26:36,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:36,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-31 01:26:36,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-03-31 01:26:36,379 INFO L87 Difference]: Start difference. First operand 10308 states and 16484 transitions. Second operand has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 01:26:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:41,762 INFO L93 Difference]: Finished difference Result 31474 states and 50468 transitions. [2023-03-31 01:26:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-03-31 01:26:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 73 [2023-03-31 01:26:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:41,874 INFO L225 Difference]: With dead ends: 31474 [2023-03-31 01:26:41,874 INFO L226 Difference]: Without dead ends: 21193 [2023-03-31 01:26:41,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2023-03-31 01:26:41,972 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1439 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1443 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:41,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1443 Valid, 358 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-03-31 01:26:41,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21193 states. [2023-03-31 01:26:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21193 to 15942. [2023-03-31 01:26:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15942 states, 13895 states have (on average 1.4889528607412739) internal successors, (20689), 15254 states have internal predecessors, (20689), 1260 states have call successors, (1260), 618 states have call predecessors, (1260), 786 states have return successors, (2593), 1310 states have call predecessors, (2593), 1257 states have call successors, (2593) [2023-03-31 01:26:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15942 states to 15942 states and 24542 transitions. [2023-03-31 01:26:45,260 INFO L78 Accepts]: Start accepts. Automaton has 15942 states and 24542 transitions. Word has length 73 [2023-03-31 01:26:45,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:26:45,260 INFO L495 AbstractCegarLoop]: Abstraction has 15942 states and 24542 transitions. [2023-03-31 01:26:45,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.75) internal successors, (62), 5 states have internal predecessors, (62), 4 states have call successors, (8), 7 states have call predecessors, (8), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 01:26:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 15942 states and 24542 transitions. [2023-03-31 01:26:45,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-03-31 01:26:45,274 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:26:45,275 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:26:45,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-03-31 01:26:45,275 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:26:45,276 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:26:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1945753963, now seen corresponding path program 1 times [2023-03-31 01:26:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:26:45,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705488518] [2023-03-31 01:26:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:26:45,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:26:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:45,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:26:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:45,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-03-31 01:26:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:45,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-03-31 01:26:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:45,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-03-31 01:26:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:45,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-03-31 01:26:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:45,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-03-31 01:26:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:26:45,507 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:26:45,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:26:45,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705488518] [2023-03-31 01:26:45,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705488518] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:26:45,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:26:45,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-03-31 01:26:45,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92275719] [2023-03-31 01:26:45,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:26:45,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 01:26:45,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:26:45,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 01:26:45,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:26:45,509 INFO L87 Difference]: Start difference. First operand 15942 states and 24542 transitions. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-03-31 01:26:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:26:53,062 INFO L93 Difference]: Finished difference Result 53669 states and 86143 transitions. [2023-03-31 01:26:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-31 01:26:53,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 3 states have internal predecessors, (97), 3 states have call successors, (11), 8 states have call predecessors, (11), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 114 [2023-03-31 01:26:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:26:53,281 INFO L225 Difference]: With dead ends: 53669 [2023-03-31 01:26:53,281 INFO L226 Difference]: Without dead ends: 37764 [2023-03-31 01:26:53,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-03-31 01:26:53,369 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 694 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-03-31 01:26:53,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 685 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-03-31 01:26:53,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37764 states.