/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 01:40:52,042 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 01:40:52,044 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 01:40:52,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 01:40:52,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 01:40:52,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 01:40:52,070 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 01:40:52,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 01:40:52,073 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 01:40:52,073 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 01:40:52,074 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 01:40:52,086 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 01:40:52,086 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 01:40:52,087 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 01:40:52,088 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 01:40:52,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 01:40:52,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 01:40:52,089 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 01:40:52,090 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 01:40:52,091 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 01:40:52,092 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 01:40:52,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 01:40:52,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 01:40:52,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 01:40:52,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 01:40:52,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 01:40:52,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 01:40:52,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 01:40:52,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 01:40:52,104 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 01:40:52,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 01:40:52,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 01:40:52,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 01:40:52,105 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 01:40:52,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 01:40:52,106 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 01:40:52,112 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 01:40:52,131 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 01:40:52,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 01:40:52,132 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 01:40:52,132 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 01:40:52,132 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 01:40:52,133 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 01:40:52,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-31 01:40:52,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-31 01:40:52,133 INFO L138 SettingsManager]: * Use SBE=true [2023-03-31 01:40:52,133 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 01:40:52,133 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 01:40:52,133 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 01:40:52,133 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 01:40:52,133 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 01:40:52,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 01:40:52,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:40:52,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 01:40:52,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 01:40:52,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 01:40:52,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-31 01:40:52,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 01:40:52,135 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-31 01:40:52,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 01:40:52,135 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-31 01:40:52,135 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-31 01:40:52,135 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-31 01:40:52,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-31 01:40:52,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 01:40:52,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 01:40:52,369 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 01:40:52,370 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 01:40:52,371 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 01:40:52,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-03-31 01:40:53,404 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 01:40:53,665 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 01:40:53,666 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-03-31 01:40:53,682 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32b153d4/e9a7c20e3d5b4552b248bc9be6064ce9/FLAG718eb1482 [2023-03-31 01:40:53,700 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b32b153d4/e9a7c20e3d5b4552b248bc9be6064ce9 [2023-03-31 01:40:53,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 01:40:53,704 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 01:40:53,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 01:40:53,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 01:40:53,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 01:40:53,709 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:40:53" (1/1) ... [2023-03-31 01:40:53,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4050fd12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:53, skipping insertion in model container [2023-03-31 01:40:53,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 01:40:53" (1/1) ... [2023-03-31 01:40:53,716 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 01:40:53,751 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 01:40:53,953 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2023-03-31 01:40:53,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:40:53,986 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 01:40:54,016 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c[7067,7080] [2023-03-31 01:40:54,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 01:40:54,051 INFO L208 MainTranslator]: Completed translation [2023-03-31 01:40:54,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54 WrapperNode [2023-03-31 01:40:54,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 01:40:54,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 01:40:54,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 01:40:54,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 01:40:54,069 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (1/1) ... [2023-03-31 01:40:54,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (1/1) ... [2023-03-31 01:40:54,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (1/1) ... [2023-03-31 01:40:54,077 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (1/1) ... [2023-03-31 01:40:54,086 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (1/1) ... [2023-03-31 01:40:54,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (1/1) ... [2023-03-31 01:40:54,094 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (1/1) ... [2023-03-31 01:40:54,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (1/1) ... [2023-03-31 01:40:54,099 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 01:40:54,100 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 01:40:54,100 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 01:40:54,100 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 01:40:54,101 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (1/1) ... [2023-03-31 01:40:54,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 01:40:54,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 01:40:54,125 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 01:40:54,131 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 01:40:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 01:40:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 01:40:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 01:40:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-03-31 01:40:54,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 01:40:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 01:40:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 01:40:54,161 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure read [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure write [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure init [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-03-31 01:40:54,162 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 01:40:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 01:40:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 01:40:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 01:40:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 01:40:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 01:40:54,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 01:40:54,257 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 01:40:54,259 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 01:40:54,768 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 01:40:54,774 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 01:40:54,774 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-03-31 01:40:54,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:40:54 BoogieIcfgContainer [2023-03-31 01:40:54,776 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 01:40:54,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 01:40:54,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 01:40:54,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 01:40:54,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 01:40:53" (1/3) ... [2023-03-31 01:40:54,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a74e326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:40:54, skipping insertion in model container [2023-03-31 01:40:54,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 01:40:54" (2/3) ... [2023-03-31 01:40:54,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a74e326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 01:40:54, skipping insertion in model container [2023-03-31 01:40:54,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 01:40:54" (3/3) ... [2023-03-31 01:40:54,787 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2023-03-31 01:40:54,801 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 01:40:54,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 01:40:54,840 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 01:40:54,845 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;@73563709, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-31 01:40:54,845 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 01:40:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand has 140 states, 128 states have (on average 1.7578125) internal successors, (225), 135 states have internal predecessors, (225), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 01:40:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-03-31 01:40:54,856 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:40:54,857 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:40:54,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:40:54,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:40:54,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1222410069, now seen corresponding path program 1 times [2023-03-31 01:40:54,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:40:54,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376619872] [2023-03-31 01:40:54,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:40:54,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:40:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:55,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:40:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:55,606 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 01:40:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:40:55,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376619872] [2023-03-31 01:40:55,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376619872] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:40:55,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:40:55,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:40:55,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651477807] [2023-03-31 01:40:55,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:40:55,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:40:55,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:40:55,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:40:55,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:40:55,652 INFO L87 Difference]: Start difference. First operand has 140 states, 128 states have (on average 1.7578125) internal successors, (225), 135 states have internal predecessors, (225), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:56,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:40:56,396 INFO L93 Difference]: Finished difference Result 305 states and 486 transitions. [2023-03-31 01:40:56,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:40:56,398 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-03-31 01:40:56,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:40:56,406 INFO L225 Difference]: With dead ends: 305 [2023-03-31 01:40:56,406 INFO L226 Difference]: Without dead ends: 198 [2023-03-31 01:40:56,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:40:56,412 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 129 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-03-31 01:40:56,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 494 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-03-31 01:40:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-03-31 01:40:56,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 196. [2023-03-31 01:40:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 192 states have (on average 1.5416666666666667) internal successors, (296), 192 states have internal predecessors, (296), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 299 transitions. [2023-03-31 01:40:56,451 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 299 transitions. Word has length 55 [2023-03-31 01:40:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:40:56,451 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 299 transitions. [2023-03-31 01:40:56,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 299 transitions. [2023-03-31 01:40:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-31 01:40:56,453 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:40:56,453 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:40:56,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 01:40:56,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:40:56,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:40:56,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1988907929, now seen corresponding path program 1 times [2023-03-31 01:40:56,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:40:56,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966516854] [2023-03-31 01:40:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:40:56,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:40:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:56,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:40:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:56,690 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 01:40:56,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:40:56,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966516854] [2023-03-31 01:40:56,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966516854] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:40:56,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:40:56,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:40:56,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816222586] [2023-03-31 01:40:56,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:40:56,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:40:56,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:40:56,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:40:56,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:40:56,694 INFO L87 Difference]: Start difference. First operand 196 states and 299 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:57,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:40:57,230 INFO L93 Difference]: Finished difference Result 333 states and 518 transitions. [2023-03-31 01:40:57,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:40:57,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-03-31 01:40:57,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:40:57,232 INFO L225 Difference]: With dead ends: 333 [2023-03-31 01:40:57,232 INFO L226 Difference]: Without dead ends: 256 [2023-03-31 01:40:57,233 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 01:40:57,233 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 111 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:40:57,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 440 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:40:57,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-03-31 01:40:57,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 254. [2023-03-31 01:40:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.552) internal successors, (388), 250 states have internal predecessors, (388), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 391 transitions. [2023-03-31 01:40:57,253 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 391 transitions. Word has length 57 [2023-03-31 01:40:57,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:40:57,254 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 391 transitions. [2023-03-31 01:40:57,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:57,254 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 391 transitions. [2023-03-31 01:40:57,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-31 01:40:57,255 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:40:57,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:40:57,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 01:40:57,256 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:40:57,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:40:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1777787490, now seen corresponding path program 1 times [2023-03-31 01:40:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:40:57,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059098754] [2023-03-31 01:40:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:40:57,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:40:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:57,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:40:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:57,468 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 01:40:57,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:40:57,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059098754] [2023-03-31 01:40:57,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059098754] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:40:57,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:40:57,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:40:57,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764693187] [2023-03-31 01:40:57,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:40:57,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:40:57,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:40:57,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:40:57,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:40:57,470 INFO L87 Difference]: Start difference. First operand 254 states and 391 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:40:57,927 INFO L93 Difference]: Finished difference Result 633 states and 990 transitions. [2023-03-31 01:40:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:40:57,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2023-03-31 01:40:57,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:40:57,929 INFO L225 Difference]: With dead ends: 633 [2023-03-31 01:40:57,929 INFO L226 Difference]: Without dead ends: 433 [2023-03-31 01:40:57,930 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 01:40:57,931 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 105 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:40:57,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 430 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:40:57,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-03-31 01:40:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 431. [2023-03-31 01:40:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 427 states have (on average 1.5550351288056206) internal successors, (664), 427 states have internal predecessors, (664), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 667 transitions. [2023-03-31 01:40:57,954 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 667 transitions. Word has length 57 [2023-03-31 01:40:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:40:57,954 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 667 transitions. [2023-03-31 01:40:57,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 3 states have internal predecessors, (54), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 667 transitions. [2023-03-31 01:40:57,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 01:40:57,955 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:40:57,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:40:57,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 01:40:57,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:40:57,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:40:57,956 INFO L85 PathProgramCache]: Analyzing trace with hash 2104907274, now seen corresponding path program 1 times [2023-03-31 01:40:57,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:40:57,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812047869] [2023-03-31 01:40:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:40:57,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:40:57,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:58,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:40:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:58,113 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 01:40:58,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:40:58,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812047869] [2023-03-31 01:40:58,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812047869] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:40:58,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:40:58,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:40:58,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566065696] [2023-03-31 01:40:58,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:40:58,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:40:58,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:40:58,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:40:58,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:40:58,115 INFO L87 Difference]: Start difference. First operand 431 states and 667 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:58,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:40:58,597 INFO L93 Difference]: Finished difference Result 787 states and 1229 transitions. [2023-03-31 01:40:58,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:40:58,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-03-31 01:40:58,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:40:58,600 INFO L225 Difference]: With dead ends: 787 [2023-03-31 01:40:58,600 INFO L226 Difference]: Without dead ends: 587 [2023-03-31 01:40:58,601 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 01:40:58,601 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 106 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:40:58,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 421 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:40:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2023-03-31 01:40:58,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 585. [2023-03-31 01:40:58,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 581 states have (on average 1.5524956970740103) internal successors, (902), 581 states have internal predecessors, (902), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 905 transitions. [2023-03-31 01:40:58,628 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 905 transitions. Word has length 59 [2023-03-31 01:40:58,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:40:58,629 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 905 transitions. [2023-03-31 01:40:58,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:58,629 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 905 transitions. [2023-03-31 01:40:58,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-03-31 01:40:58,630 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:40:58,630 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:40:58,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 01:40:58,630 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:40:58,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:40:58,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1252726219, now seen corresponding path program 1 times [2023-03-31 01:40:58,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:40:58,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836607097] [2023-03-31 01:40:58,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:40:58,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:40:58,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:58,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:40:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:58,795 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 01:40:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:40:58,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836607097] [2023-03-31 01:40:58,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836607097] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:40:58,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:40:58,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:40:58,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283660521] [2023-03-31 01:40:58,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:40:58,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:40:58,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:40:58,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:40:58,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:40:58,797 INFO L87 Difference]: Start difference. First operand 585 states and 905 transitions. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:59,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:40:59,215 INFO L93 Difference]: Finished difference Result 1558 states and 2416 transitions. [2023-03-31 01:40:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:40:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2023-03-31 01:40:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:40:59,219 INFO L225 Difference]: With dead ends: 1558 [2023-03-31 01:40:59,219 INFO L226 Difference]: Without dead ends: 1040 [2023-03-31 01:40:59,220 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 01:40:59,221 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 100 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 01:40:59,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 367 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 01:40:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2023-03-31 01:40:59,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1038. [2023-03-31 01:40:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1034 states have (on average 1.5367504835589942) internal successors, (1589), 1034 states have internal predecessors, (1589), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 1592 transitions. [2023-03-31 01:40:59,260 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 1592 transitions. Word has length 59 [2023-03-31 01:40:59,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:40:59,260 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 1592 transitions. [2023-03-31 01:40:59,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:40:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 1592 transitions. [2023-03-31 01:40:59,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-03-31 01:40:59,261 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:40:59,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:40:59,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 01:40:59,262 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:40:59,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:40:59,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1857158398, now seen corresponding path program 1 times [2023-03-31 01:40:59,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:40:59,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088981381] [2023-03-31 01:40:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:40:59,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:40:59,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:59,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:40:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:40:59,458 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 01:40:59,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:40:59,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088981381] [2023-03-31 01:40:59,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088981381] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:40:59,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:40:59,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:40:59,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186636807] [2023-03-31 01:40:59,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:40:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:40:59,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:40:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:40:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:40:59,460 INFO L87 Difference]: Start difference. First operand 1038 states and 1592 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:00,201 INFO L93 Difference]: Finished difference Result 5059 states and 7875 transitions. [2023-03-31 01:41:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 01:41:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2023-03-31 01:41:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:00,216 INFO L225 Difference]: With dead ends: 5059 [2023-03-31 01:41:00,216 INFO L226 Difference]: Without dead ends: 4056 [2023-03-31 01:41:00,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-03-31 01:41:00,220 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 908 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 975 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:00,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 975 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:00,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4056 states. [2023-03-31 01:41:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4056 to 1890. [2023-03-31 01:41:00,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1890 states, 1886 states have (on average 1.5471898197242842) internal successors, (2918), 1886 states have internal predecessors, (2918), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2921 transitions. [2023-03-31 01:41:00,376 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2921 transitions. Word has length 61 [2023-03-31 01:41:00,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:00,377 INFO L495 AbstractCegarLoop]: Abstraction has 1890 states and 2921 transitions. [2023-03-31 01:41:00,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 5 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2921 transitions. [2023-03-31 01:41:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-03-31 01:41:00,378 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:00,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:00,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-03-31 01:41:00,378 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:00,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:00,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1798945970, now seen corresponding path program 1 times [2023-03-31 01:41:00,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:00,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441324357] [2023-03-31 01:41:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:00,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:00,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:00,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:00,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441324357] [2023-03-31 01:41:00,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441324357] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:00,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:00,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:41:00,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379609797] [2023-03-31 01:41:00,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:00,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:41:00,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:00,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:41:00,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:00,563 INFO L87 Difference]: Start difference. First operand 1890 states and 2921 transitions. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:01,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:01,205 INFO L93 Difference]: Finished difference Result 6027 states and 9371 transitions. [2023-03-31 01:41:01,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:41:01,206 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-03-31 01:41:01,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:01,220 INFO L225 Difference]: With dead ends: 6027 [2023-03-31 01:41:01,220 INFO L226 Difference]: Without dead ends: 4204 [2023-03-31 01:41:01,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:41:01,228 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 357 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:01,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [357 Valid, 646 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2023-03-31 01:41:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 3029. [2023-03-31 01:41:01,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3029 states, 3025 states have (on average 1.542809917355372) internal successors, (4667), 3025 states have internal predecessors, (4667), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:01,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3029 states to 3029 states and 4670 transitions. [2023-03-31 01:41:01,457 INFO L78 Accepts]: Start accepts. Automaton has 3029 states and 4670 transitions. Word has length 62 [2023-03-31 01:41:01,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:01,457 INFO L495 AbstractCegarLoop]: Abstraction has 3029 states and 4670 transitions. [2023-03-31 01:41:01,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:01,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3029 states and 4670 transitions. [2023-03-31 01:41:01,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-03-31 01:41:01,458 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:01,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:01,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 01:41:01,458 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:01,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:01,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1396092956, now seen corresponding path program 1 times [2023-03-31 01:41:01,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:01,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895295056] [2023-03-31 01:41:01,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:01,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:01,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:01,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:01,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:01,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895295056] [2023-03-31 01:41:01,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895295056] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:01,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:01,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:01,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973311048] [2023-03-31 01:41:01,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:01,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:01,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:01,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:01,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:01,643 INFO L87 Difference]: Start difference. First operand 3029 states and 4670 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:02,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:02,395 INFO L93 Difference]: Finished difference Result 5790 states and 8948 transitions. [2023-03-31 01:41:02,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 01:41:02,395 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2023-03-31 01:41:02,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:02,410 INFO L225 Difference]: With dead ends: 5790 [2023-03-31 01:41:02,410 INFO L226 Difference]: Without dead ends: 4131 [2023-03-31 01:41:02,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:02,416 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 101 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:02,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 403 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:02,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2023-03-31 01:41:02,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 4129. [2023-03-31 01:41:02,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4129 states, 4125 states have (on average 1.5282424242424242) internal successors, (6304), 4125 states have internal predecessors, (6304), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:02,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4129 states to 4129 states and 6307 transitions. [2023-03-31 01:41:02,735 INFO L78 Accepts]: Start accepts. Automaton has 4129 states and 6307 transitions. Word has length 62 [2023-03-31 01:41:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:02,735 INFO L495 AbstractCegarLoop]: Abstraction has 4129 states and 6307 transitions. [2023-03-31 01:41:02,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:02,735 INFO L276 IsEmpty]: Start isEmpty. Operand 4129 states and 6307 transitions. [2023-03-31 01:41:02,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-03-31 01:41:02,736 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:02,737 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:02,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-03-31 01:41:02,737 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:02,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:02,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1794880738, now seen corresponding path program 1 times [2023-03-31 01:41:02,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:02,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876388244] [2023-03-31 01:41:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:02,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:03,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:03,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:03,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876388244] [2023-03-31 01:41:03,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876388244] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:03,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:03,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:03,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656717750] [2023-03-31 01:41:03,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:03,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:03,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:03,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:03,129 INFO L87 Difference]: Start difference. First operand 4129 states and 6307 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:03,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:03,978 INFO L93 Difference]: Finished difference Result 6927 states and 10496 transitions. [2023-03-31 01:41:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:03,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2023-03-31 01:41:03,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:03,999 INFO L225 Difference]: With dead ends: 6927 [2023-03-31 01:41:03,999 INFO L226 Difference]: Without dead ends: 6925 [2023-03-31 01:41:04,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:41:04,004 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 226 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:04,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 906 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:04,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2023-03-31 01:41:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 4233. [2023-03-31 01:41:04,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4233 states, 4229 states have (on average 1.5088673445258927) internal successors, (6381), 4229 states have internal predecessors, (6381), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:04,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4233 states to 4233 states and 6384 transitions. [2023-03-31 01:41:04,402 INFO L78 Accepts]: Start accepts. Automaton has 4233 states and 6384 transitions. Word has length 70 [2023-03-31 01:41:04,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:04,402 INFO L495 AbstractCegarLoop]: Abstraction has 4233 states and 6384 transitions. [2023-03-31 01:41:04,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 5 states have internal predecessors, (67), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:04,402 INFO L276 IsEmpty]: Start isEmpty. Operand 4233 states and 6384 transitions. [2023-03-31 01:41:04,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-03-31 01:41:04,407 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:04,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:04,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-03-31 01:41:04,407 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:04,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:04,408 INFO L85 PathProgramCache]: Analyzing trace with hash 775223646, now seen corresponding path program 1 times [2023-03-31 01:41:04,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:04,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078844877] [2023-03-31 01:41:04,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:04,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:04,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:04,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 01:41:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:04,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078844877] [2023-03-31 01:41:04,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078844877] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:04,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:04,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:04,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863290869] [2023-03-31 01:41:04,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:04,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:04,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:04,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:04,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:04,661 INFO L87 Difference]: Start difference. First operand 4233 states and 6384 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:05,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:05,919 INFO L93 Difference]: Finished difference Result 12226 states and 18476 transitions. [2023-03-31 01:41:05,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:05,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2023-03-31 01:41:05,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:05,945 INFO L225 Difference]: With dead ends: 12226 [2023-03-31 01:41:05,945 INFO L226 Difference]: Without dead ends: 9408 [2023-03-31 01:41:05,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:05,953 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 446 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:05,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 801 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9408 states. [2023-03-31 01:41:06,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9408 to 6810. [2023-03-31 01:41:06,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6810 states, 6806 states have (on average 1.5060240963855422) internal successors, (10250), 6806 states have internal predecessors, (10250), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:06,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6810 states to 6810 states and 10253 transitions. [2023-03-31 01:41:06,664 INFO L78 Accepts]: Start accepts. Automaton has 6810 states and 10253 transitions. Word has length 91 [2023-03-31 01:41:06,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:06,665 INFO L495 AbstractCegarLoop]: Abstraction has 6810 states and 10253 transitions. [2023-03-31 01:41:06,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:06,665 INFO L276 IsEmpty]: Start isEmpty. Operand 6810 states and 10253 transitions. [2023-03-31 01:41:06,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-03-31 01:41:06,666 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:06,666 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:41:06,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-03-31 01:41:06,668 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:06,669 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:06,670 INFO L85 PathProgramCache]: Analyzing trace with hash 746945757, now seen corresponding path program 1 times [2023-03-31 01:41:06,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:06,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209240550] [2023-03-31 01:41:06,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:06,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:06,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:06,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:06,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 01:41:06,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:06,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209240550] [2023-03-31 01:41:06,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209240550] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:06,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:06,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:06,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523874630] [2023-03-31 01:41:06,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:06,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:06,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:06,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:06,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:06,944 INFO L87 Difference]: Start difference. First operand 6810 states and 10253 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:08,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:08,321 INFO L93 Difference]: Finished difference Result 13841 states and 20914 transitions. [2023-03-31 01:41:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2023-03-31 01:41:08,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:08,351 INFO L225 Difference]: With dead ends: 13841 [2023-03-31 01:41:08,351 INFO L226 Difference]: Without dead ends: 11023 [2023-03-31 01:41:08,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:08,362 INFO L413 NwaCegarLoop]: 313 mSDtfsCounter, 443 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 869 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:08,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [443 Valid, 869 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:08,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11023 states. [2023-03-31 01:41:09,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11023 to 10214. [2023-03-31 01:41:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10214 states, 10210 states have (on average 1.504407443682664) internal successors, (15360), 10210 states have internal predecessors, (15360), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:09,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10214 states to 10214 states and 15363 transitions. [2023-03-31 01:41:09,377 INFO L78 Accepts]: Start accepts. Automaton has 10214 states and 15363 transitions. Word has length 91 [2023-03-31 01:41:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:09,378 INFO L495 AbstractCegarLoop]: Abstraction has 10214 states and 15363 transitions. [2023-03-31 01:41:09,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 10214 states and 15363 transitions. [2023-03-31 01:41:09,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-03-31 01:41:09,380 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:09,380 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:41:09,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-03-31 01:41:09,380 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:09,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash -88084737, now seen corresponding path program 1 times [2023-03-31 01:41:09,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:09,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617061465] [2023-03-31 01:41:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:09,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:09,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:41:09,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:09,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617061465] [2023-03-31 01:41:09,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617061465] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:09,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:09,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:09,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607859191] [2023-03-31 01:41:09,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:09,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:09,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:09,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:09,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:09,604 INFO L87 Difference]: Start difference. First operand 10214 states and 15363 transitions. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:11,139 INFO L93 Difference]: Finished difference Result 14312 states and 21641 transitions. [2023-03-31 01:41:11,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:11,140 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2023-03-31 01:41:11,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:11,171 INFO L225 Difference]: With dead ends: 14312 [2023-03-31 01:41:11,171 INFO L226 Difference]: Without dead ends: 12540 [2023-03-31 01:41:11,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:11,181 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 446 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:11,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 928 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:11,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12540 states. [2023-03-31 01:41:12,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12540 to 11774. [2023-03-31 01:41:12,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11774 states, 11770 states have (on average 1.506711979609176) internal successors, (17734), 11770 states have internal predecessors, (17734), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11774 states to 11774 states and 17737 transitions. [2023-03-31 01:41:12,189 INFO L78 Accepts]: Start accepts. Automaton has 11774 states and 17737 transitions. Word has length 91 [2023-03-31 01:41:12,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:12,189 INFO L495 AbstractCegarLoop]: Abstraction has 11774 states and 17737 transitions. [2023-03-31 01:41:12,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 5 states have internal predecessors, (87), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:12,189 INFO L276 IsEmpty]: Start isEmpty. Operand 11774 states and 17737 transitions. [2023-03-31 01:41:12,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 01:41:12,191 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:12,191 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:12,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-03-31 01:41:12,191 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:12,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:12,191 INFO L85 PathProgramCache]: Analyzing trace with hash 518943137, now seen corresponding path program 1 times [2023-03-31 01:41:12,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:12,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285408782] [2023-03-31 01:41:12,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:12,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:12,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:12,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:12,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 01:41:12,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:12,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285408782] [2023-03-31 01:41:12,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285408782] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:12,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:12,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:41:12,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793033773] [2023-03-31 01:41:12,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:12,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:41:12,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:12,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:41:12,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:12,501 INFO L87 Difference]: Start difference. First operand 11774 states and 17737 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:15,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:15,459 INFO L93 Difference]: Finished difference Result 33594 states and 50583 transitions. [2023-03-31 01:41:15,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:15,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2023-03-31 01:41:15,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:15,519 INFO L225 Difference]: With dead ends: 33594 [2023-03-31 01:41:15,520 INFO L226 Difference]: Without dead ends: 24540 [2023-03-31 01:41:15,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:41:15,541 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 370 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:15,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 512 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24540 states. [2023-03-31 01:41:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24540 to 20730. [2023-03-31 01:41:17,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20730 states, 20726 states have (on average 1.5024606774100164) internal successors, (31140), 20726 states have internal predecessors, (31140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:17,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20730 states to 20730 states and 31143 transitions. [2023-03-31 01:41:17,788 INFO L78 Accepts]: Start accepts. Automaton has 20730 states and 31143 transitions. Word has length 92 [2023-03-31 01:41:17,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:17,789 INFO L495 AbstractCegarLoop]: Abstraction has 20730 states and 31143 transitions. [2023-03-31 01:41:17,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:17,789 INFO L276 IsEmpty]: Start isEmpty. Operand 20730 states and 31143 transitions. [2023-03-31 01:41:17,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 01:41:17,790 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:17,791 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:41:17,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-03-31 01:41:17,791 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:17,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:17,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1502729969, now seen corresponding path program 1 times [2023-03-31 01:41:17,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:17,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66489088] [2023-03-31 01:41:17,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:17,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:18,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:41:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:18,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66489088] [2023-03-31 01:41:18,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66489088] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:18,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:18,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:41:18,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376391509] [2023-03-31 01:41:18,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:18,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:41:18,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:18,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:41:18,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:18,017 INFO L87 Difference]: Start difference. First operand 20730 states and 31143 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:21,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:21,310 INFO L93 Difference]: Finished difference Result 31887 states and 48160 transitions. [2023-03-31 01:41:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 01:41:21,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2023-03-31 01:41:21,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:21,363 INFO L225 Difference]: With dead ends: 31887 [2023-03-31 01:41:21,363 INFO L226 Difference]: Without dead ends: 26259 [2023-03-31 01:41:21,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:21,380 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 208 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:21,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 599 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:21,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26259 states. [2023-03-31 01:41:24,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26259 to 24775. [2023-03-31 01:41:24,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24775 states, 24771 states have (on average 1.5028057002139599) internal successors, (37226), 24771 states have internal predecessors, (37226), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24775 states to 24775 states and 37229 transitions. [2023-03-31 01:41:24,141 INFO L78 Accepts]: Start accepts. Automaton has 24775 states and 37229 transitions. Word has length 92 [2023-03-31 01:41:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:24,141 INFO L495 AbstractCegarLoop]: Abstraction has 24775 states and 37229 transitions. [2023-03-31 01:41:24,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 24775 states and 37229 transitions. [2023-03-31 01:41:24,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 01:41:24,143 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:24,144 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 01:41:24,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-03-31 01:41:24,144 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:24,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:24,144 INFO L85 PathProgramCache]: Analyzing trace with hash 374523710, now seen corresponding path program 1 times [2023-03-31 01:41:24,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:24,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988917953] [2023-03-31 01:41:24,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:24,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:24,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:24,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 01:41:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:24,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988917953] [2023-03-31 01:41:24,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988917953] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:24,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:24,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:24,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960388477] [2023-03-31 01:41:24,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:24,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:24,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:24,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:24,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:24,382 INFO L87 Difference]: Start difference. First operand 24775 states and 37229 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:26,953 INFO L93 Difference]: Finished difference Result 45991 states and 69174 transitions. [2023-03-31 01:41:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 01:41:26,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2023-03-31 01:41:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:26,989 INFO L225 Difference]: With dead ends: 45991 [2023-03-31 01:41:26,989 INFO L226 Difference]: Without dead ends: 21296 [2023-03-31 01:41:27,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:27,023 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 77 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:27,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 417 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:27,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21296 states. [2023-03-31 01:41:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21296 to 21151. [2023-03-31 01:41:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21151 states, 21147 states have (on average 1.4943490802477892) internal successors, (31601), 21147 states have internal predecessors, (31601), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:29,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21151 states to 21151 states and 31604 transitions. [2023-03-31 01:41:29,159 INFO L78 Accepts]: Start accepts. Automaton has 21151 states and 31604 transitions. Word has length 92 [2023-03-31 01:41:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:29,159 INFO L495 AbstractCegarLoop]: Abstraction has 21151 states and 31604 transitions. [2023-03-31 01:41:29,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 3 states have internal predecessors, (89), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 21151 states and 31604 transitions. [2023-03-31 01:41:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-03-31 01:41:29,160 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:29,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:29,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-03-31 01:41:29,161 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:29,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:29,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1642022563, now seen corresponding path program 1 times [2023-03-31 01:41:29,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:29,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419525771] [2023-03-31 01:41:29,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:29,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:29,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:29,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 01:41:29,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:29,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419525771] [2023-03-31 01:41:29,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419525771] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:29,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:29,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 01:41:29,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180961361] [2023-03-31 01:41:29,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:29,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 01:41:29,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 01:41:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 01:41:29,443 INFO L87 Difference]: Start difference. First operand 21151 states and 31604 transitions. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:34,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:34,651 INFO L93 Difference]: Finished difference Result 53083 states and 79689 transitions. [2023-03-31 01:41:34,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:34,652 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2023-03-31 01:41:34,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:34,724 INFO L225 Difference]: With dead ends: 53083 [2023-03-31 01:41:34,724 INFO L226 Difference]: Without dead ends: 38987 [2023-03-31 01:41:34,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 01:41:34,746 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 347 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:34,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 527 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38987 states. [2023-03-31 01:41:38,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38987 to 34539. [2023-03-31 01:41:38,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34539 states, 34535 states have (on average 1.4942811640364848) internal successors, (51605), 34535 states have internal predecessors, (51605), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34539 states to 34539 states and 51608 transitions. [2023-03-31 01:41:38,857 INFO L78 Accepts]: Start accepts. Automaton has 34539 states and 51608 transitions. Word has length 92 [2023-03-31 01:41:38,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:38,858 INFO L495 AbstractCegarLoop]: Abstraction has 34539 states and 51608 transitions. [2023-03-31 01:41:38,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 4 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:38,858 INFO L276 IsEmpty]: Start isEmpty. Operand 34539 states and 51608 transitions. [2023-03-31 01:41:38,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-03-31 01:41:38,862 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:38,862 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:38,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-03-31 01:41:38,862 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:38,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:38,863 INFO L85 PathProgramCache]: Analyzing trace with hash 324072789, now seen corresponding path program 1 times [2023-03-31 01:41:38,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:38,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671059780] [2023-03-31 01:41:38,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:38,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:38,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-03-31 01:41:39,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:39,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671059780] [2023-03-31 01:41:39,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671059780] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:39,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:39,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 01:41:39,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634000409] [2023-03-31 01:41:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:39,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 01:41:39,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:39,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 01:41:39,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:39,042 INFO L87 Difference]: Start difference. First operand 34539 states and 51608 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:43,376 INFO L93 Difference]: Finished difference Result 63653 states and 95661 transitions. [2023-03-31 01:41:43,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 01:41:43,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2023-03-31 01:41:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:43,428 INFO L225 Difference]: With dead ends: 63653 [2023-03-31 01:41:43,428 INFO L226 Difference]: Without dead ends: 27626 [2023-03-31 01:41:43,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 01:41:43,461 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 87 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:43,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 443 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 01:41:43,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27626 states. [2023-03-31 01:41:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27626 to 21533. [2023-03-31 01:41:46,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21533 states, 21529 states have (on average 1.4842305727158716) internal successors, (31954), 21529 states have internal predecessors, (31954), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21533 states to 21533 states and 31957 transitions. [2023-03-31 01:41:46,422 INFO L78 Accepts]: Start accepts. Automaton has 21533 states and 31957 transitions. Word has length 136 [2023-03-31 01:41:46,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 01:41:46,422 INFO L495 AbstractCegarLoop]: Abstraction has 21533 states and 31957 transitions. [2023-03-31 01:41:46,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 3 states have internal predecessors, (114), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:46,422 INFO L276 IsEmpty]: Start isEmpty. Operand 21533 states and 31957 transitions. [2023-03-31 01:41:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-03-31 01:41:46,426 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 01:41:46,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 01:41:46,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-03-31 01:41:46,426 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 01:41:46,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 01:41:46,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1726033950, now seen corresponding path program 1 times [2023-03-31 01:41:46,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-31 01:41:46,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770243774] [2023-03-31 01:41:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 01:41:46,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 01:41:46,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:46,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-31 01:41:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 01:41:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-03-31 01:41:46,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-31 01:41:46,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770243774] [2023-03-31 01:41:46,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770243774] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 01:41:46,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 01:41:46,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-31 01:41:46,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954026075] [2023-03-31 01:41:46,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 01:41:46,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-03-31 01:41:46,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-31 01:41:46,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-03-31 01:41:46,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 01:41:46,690 INFO L87 Difference]: Start difference. First operand 21533 states and 31957 transitions. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 01:41:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 01:41:51,284 INFO L93 Difference]: Finished difference Result 38254 states and 57391 transitions. [2023-03-31 01:41:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 01:41:51,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 5 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2023-03-31 01:41:51,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 01:41:51,325 INFO L225 Difference]: With dead ends: 38254 [2023-03-31 01:41:51,326 INFO L226 Difference]: Without dead ends: 29490 [2023-03-31 01:41:51,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-03-31 01:41:51,337 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 427 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 01:41:51,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 633 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 01:41:51,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29490 states.