/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/eca-rers2012/Problem19_label46.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:50:40,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:50:40,618 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:50:40,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:50:40,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:50:40,638 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:50:40,639 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:50:40,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:50:40,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:50:40,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:50:40,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:50:40,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:50:40,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:50:40,658 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:50:40,659 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:50:40,660 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:50:40,660 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:50:40,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:50:40,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:50:40,662 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:50:40,663 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:50:40,665 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:50:40,666 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:50:40,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:50:40,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:50:40,670 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:50:40,670 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:50:40,670 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:50:40,671 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:50:40,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:50:40,671 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:50:40,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:50:40,672 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:50:40,672 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:50:40,673 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:50:40,673 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:50:40,674 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 [2023-03-30 23:50:40,687 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:50:40,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:50:40,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:50:40,687 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:50:40,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:50:40,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:50:40,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:50:40,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:50:40,688 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:50:40,688 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:50:40,688 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:50:40,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:50:40,691 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:50:40,691 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:50:40,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:50:40,692 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:50:40,692 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:50:40,692 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:50:40,692 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:50:40,692 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:50:40,692 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:50:40,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:50:40,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:50:40,693 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:50:40,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:50:40,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:50:40,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:50:40,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:50:40,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:50:40,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:50:40,694 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:50:40,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:50:40,694 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:50:40,694 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:50:40,694 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:50:40,694 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:50:40,873 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:50:40,887 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:50:40,889 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:50:40,890 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:50:40,890 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:50:40,891 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label46.c [2023-03-30 23:50:41,835 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:50:42,272 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:50:42,272 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label46.c [2023-03-30 23:50:42,306 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c63f5fd3/9ed24833b0e5484daffee9cb5fbdb1f4/FLAG021f2cf35 [2023-03-30 23:50:42,449 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2c63f5fd3/9ed24833b0e5484daffee9cb5fbdb1f4 [2023-03-30 23:50:42,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:50:42,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:50:42,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:50:42,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:50:42,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:50:42,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:50:42" (1/1) ... [2023-03-30 23:50:42,457 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a44ae92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:42, skipping insertion in model container [2023-03-30 23:50:42,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:50:42" (1/1) ... [2023-03-30 23:50:42,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:50:42,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:50:42,851 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/eca-rers2012/Problem19_label46.c[4445,4458] [2023-03-30 23:50:43,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:50:43,599 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:50:43,640 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/eca-rers2012/Problem19_label46.c[4445,4458] [2023-03-30 23:50:44,122 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:50:44,149 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:50:44,149 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44 WrapperNode [2023-03-30 23:50:44,149 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:50:44,150 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:50:44,151 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:50:44,151 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:50:44,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (1/1) ... [2023-03-30 23:50:44,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (1/1) ... [2023-03-30 23:50:44,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (1/1) ... [2023-03-30 23:50:44,225 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (1/1) ... [2023-03-30 23:50:44,331 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (1/1) ... [2023-03-30 23:50:44,358 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (1/1) ... [2023-03-30 23:50:44,390 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (1/1) ... [2023-03-30 23:50:44,407 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (1/1) ... [2023-03-30 23:50:44,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:50:44,453 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:50:44,453 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:50:44,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:50:44,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (1/1) ... [2023-03-30 23:50:44,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:50:44,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:50:44,477 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) [2023-03-30 23:50:44,493 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 [2023-03-30 23:50:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:50:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:50:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:50:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:50:44,502 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:50:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:50:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:50:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:50:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:50:44,503 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:50:44,503 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:50:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:50:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:50:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:50:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:50:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:50:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:50:44,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:50:44,554 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:50:44,556 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:50:49,957 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:50:49,973 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:50:49,973 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:50:49,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:49 BoogieIcfgContainer [2023-03-30 23:50:49,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:50:49,977 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:50:49,977 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:50:49,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:50:49,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:50:42" (1/3) ... [2023-03-30 23:50:49,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b4c5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:49, skipping insertion in model container [2023-03-30 23:50:49,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:50:44" (2/3) ... [2023-03-30 23:50:49,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b4c5d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:49, skipping insertion in model container [2023-03-30 23:50:49,980 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:49" (3/3) ... [2023-03-30 23:50:49,981 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label46.c [2023-03-30 23:50:49,992 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:50:49,992 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:50:50,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:50:50,065 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;@400c5ce6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:50:50,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:50:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-30 23:50:50,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-30 23:50:50,078 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:50,078 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] [2023-03-30 23:50:50,079 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:50,082 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:50,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1496585140, now seen corresponding path program 1 times [2023-03-30 23:50:50,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:50,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102469028] [2023-03-30 23:50:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:50,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:50,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:50,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:50,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:50,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:50,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102469028] [2023-03-30 23:50:50,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102469028] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:50,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:50,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:50:50,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36593864] [2023-03-30 23:50:50,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:50,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:50:50,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:50,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:50:50,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:50:50,519 INFO L87 Difference]: Start difference. First operand has 1777 states, 1759 states have (on average 1.8635588402501422) internal successors, (3278), 1760 states have internal predecessors, (3278), 8 states have call successors, (8), 8 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:51:02,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:51:02,848 INFO L93 Difference]: Finished difference Result 6572 states and 12487 transitions. [2023-03-30 23:51:02,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 23:51:02,850 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2023-03-30 23:51:02,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:51:02,876 INFO L225 Difference]: With dead ends: 6572 [2023-03-30 23:51:02,876 INFO L226 Difference]: Without dead ends: 4727 [2023-03-30 23:51:02,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:51:02,886 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 7968 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 8395 mSolverCounterSat, 3886 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7968 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 12281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3886 IncrementalHoareTripleChecker+Valid, 8395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2023-03-30 23:51:02,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7968 Valid, 464 Invalid, 12281 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3886 Valid, 8395 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2023-03-30 23:51:02,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4727 states. [2023-03-30 23:51:03,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4727 to 4629. [2023-03-30 23:51:03,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4574 states have (on average 1.7586357673808484) internal successors, (8044), 4577 states have internal predecessors, (8044), 20 states have call successors, (20), 20 states have call predecessors, (20), 34 states have return successors, (74), 31 states have call predecessors, (74), 19 states have call successors, (74) [2023-03-30 23:51:03,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 8138 transitions. [2023-03-30 23:51:03,038 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 8138 transitions. Word has length 38 [2023-03-30 23:51:03,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:51:03,039 INFO L495 AbstractCegarLoop]: Abstraction has 4629 states and 8138 transitions. [2023-03-30 23:51:03,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-30 23:51:03,040 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 8138 transitions. [2023-03-30 23:51:03,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-03-30 23:51:03,048 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:03,049 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:51:03,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:51:03,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:03,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:03,052 INFO L85 PathProgramCache]: Analyzing trace with hash 117905761, now seen corresponding path program 1 times [2023-03-30 23:51:03,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:03,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334481502] [2023-03-30 23:51:03,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:03,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:03,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:03,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:51:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:03,513 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:51:03,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:03,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334481502] [2023-03-30 23:51:03,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334481502] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:51:03,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:51:03,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:51:03,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037457912] [2023-03-30 23:51:03,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:51:03,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:51:03,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:03,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:51:03,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:51:03,519 INFO L87 Difference]: Start difference. First operand 4629 states and 8138 transitions. Second operand has 7 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:51:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:51:14,676 INFO L93 Difference]: Finished difference Result 13980 states and 24832 transitions. [2023-03-30 23:51:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:51:14,677 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 137 [2023-03-30 23:51:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:51:14,709 INFO L225 Difference]: With dead ends: 13980 [2023-03-30 23:51:14,710 INFO L226 Difference]: Without dead ends: 9357 [2023-03-30 23:51:14,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:51:14,776 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 8894 mSDsluCounter, 861 mSDsCounter, 0 mSdLazyCounter, 10661 mSolverCounterSat, 2472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8894 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 13133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2472 IncrementalHoareTripleChecker+Valid, 10661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:51:14,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8894 Valid, 1151 Invalid, 13133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2472 Valid, 10661 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-03-30 23:51:14,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9357 states. [2023-03-30 23:51:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9357 to 9175. [2023-03-30 23:51:14,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9175 states, 9022 states have (on average 1.4976723564619818) internal successors, (13512), 9037 states have internal predecessors, (13512), 38 states have call successors, (38), 38 states have call predecessors, (38), 114 states have return successors, (354), 99 states have call predecessors, (354), 37 states have call successors, (354) [2023-03-30 23:51:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9175 states to 9175 states and 13904 transitions. [2023-03-30 23:51:14,958 INFO L78 Accepts]: Start accepts. Automaton has 9175 states and 13904 transitions. Word has length 137 [2023-03-30 23:51:14,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:51:14,960 INFO L495 AbstractCegarLoop]: Abstraction has 9175 states and 13904 transitions. [2023-03-30 23:51:14,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 21.833333333333332) internal successors, (131), 4 states have internal predecessors, (131), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:51:14,960 INFO L276 IsEmpty]: Start isEmpty. Operand 9175 states and 13904 transitions. [2023-03-30 23:51:14,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-03-30 23:51:14,966 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:14,966 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:51:14,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:51:14,967 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:14,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:14,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1468732659, now seen corresponding path program 1 times [2023-03-30 23:51:14,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:14,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801552051] [2023-03-30 23:51:14,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:14,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:15,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:15,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:15,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:51:15,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:15,295 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:51:15,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:15,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801552051] [2023-03-30 23:51:15,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801552051] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:51:15,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:51:15,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:51:15,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573804237] [2023-03-30 23:51:15,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:51:15,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:51:15,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:15,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:51:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:51:15,299 INFO L87 Difference]: Start difference. First operand 9175 states and 13904 transitions. Second operand has 7 states, 6 states have (on average 23.5) internal successors, (141), 4 states have internal predecessors, (141), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:51:25,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:51:25,095 INFO L93 Difference]: Finished difference Result 27626 states and 42664 transitions. [2023-03-30 23:51:25,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:51:25,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 23.5) internal successors, (141), 4 states have internal predecessors, (141), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 147 [2023-03-30 23:51:25,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:51:25,146 INFO L225 Difference]: With dead ends: 27626 [2023-03-30 23:51:25,146 INFO L226 Difference]: Without dead ends: 18457 [2023-03-30 23:51:25,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:51:25,163 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 14074 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 9862 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14074 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 10692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 9862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:51:25,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14074 Valid, 777 Invalid, 10692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 9862 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-03-30 23:51:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18457 states. [2023-03-30 23:51:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18457 to 18154. [2023-03-30 23:51:25,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18154 states, 17758 states have (on average 1.423471111611668) internal successors, (25278), 17807 states have internal predecessors, (25278), 74 states have call successors, (74), 74 states have call predecessors, (74), 321 states have return successors, (1124), 272 states have call predecessors, (1124), 73 states have call successors, (1124) [2023-03-30 23:51:25,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18154 states to 18154 states and 26476 transitions. [2023-03-30 23:51:25,476 INFO L78 Accepts]: Start accepts. Automaton has 18154 states and 26476 transitions. Word has length 147 [2023-03-30 23:51:25,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:51:25,477 INFO L495 AbstractCegarLoop]: Abstraction has 18154 states and 26476 transitions. [2023-03-30 23:51:25,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 23.5) internal successors, (141), 4 states have internal predecessors, (141), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:51:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 18154 states and 26476 transitions. [2023-03-30 23:51:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-03-30 23:51:25,479 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:25,479 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:51:25,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-30 23:51:25,480 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:25,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1410130508, now seen corresponding path program 1 times [2023-03-30 23:51:25,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:25,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266066058] [2023-03-30 23:51:25,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:25,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:25,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:25,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:25,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:51:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:51:25,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:25,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266066058] [2023-03-30 23:51:25,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266066058] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:51:25,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:51:25,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:51:25,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175778171] [2023-03-30 23:51:25,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:51:25,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 23:51:25,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:25,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 23:51:25,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-03-30 23:51:25,997 INFO L87 Difference]: Start difference. First operand 18154 states and 26476 transitions. Second operand has 8 states, 7 states have (on average 35.42857142857143) internal successors, (248), 5 states have internal predecessors, (248), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:51:38,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:51:38,912 INFO L93 Difference]: Finished difference Result 55381 states and 83195 transitions. [2023-03-30 23:51:38,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-03-30 23:51:38,912 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 35.42857142857143) internal successors, (248), 5 states have internal predecessors, (248), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 254 [2023-03-30 23:51:38,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:51:38,995 INFO L225 Difference]: With dead ends: 55381 [2023-03-30 23:51:38,995 INFO L226 Difference]: Without dead ends: 37233 [2023-03-30 23:51:39,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:51:39,023 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 8004 mSDsluCounter, 1039 mSDsCounter, 0 mSdLazyCounter, 15325 mSolverCounterSat, 2088 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8004 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 17413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2088 IncrementalHoareTripleChecker+Valid, 15325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2023-03-30 23:51:39,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8004 Valid, 1302 Invalid, 17413 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2088 Valid, 15325 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2023-03-30 23:51:39,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37233 states. [2023-03-30 23:51:39,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37233 to 36533. [2023-03-30 23:51:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36533 states, 35411 states have (on average 1.2764677642540454) internal successors, (45201), 35590 states have internal predecessors, (45201), 146 states have call successors, (146), 146 states have call predecessors, (146), 975 states have return successors, (4133), 796 states have call predecessors, (4133), 145 states have call successors, (4133) [2023-03-30 23:51:39,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36533 states to 36533 states and 49480 transitions. [2023-03-30 23:51:39,659 INFO L78 Accepts]: Start accepts. Automaton has 36533 states and 49480 transitions. Word has length 254 [2023-03-30 23:51:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:51:39,660 INFO L495 AbstractCegarLoop]: Abstraction has 36533 states and 49480 transitions. [2023-03-30 23:51:39,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 35.42857142857143) internal successors, (248), 5 states have internal predecessors, (248), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-30 23:51:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 36533 states and 49480 transitions. [2023-03-30 23:51:39,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2023-03-30 23:51:39,664 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:51:39,664 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:51:39,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-30 23:51:39,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:51:39,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:51:39,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1840174551, now seen corresponding path program 1 times [2023-03-30 23:51:39,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:51:39,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899176120] [2023-03-30 23:51:39,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:39,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:51:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:39,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:51:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:39,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:51:39,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:39,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2023-03-30 23:51:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-30 23:51:40,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:51:40,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899176120] [2023-03-30 23:51:40,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899176120] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 23:51:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447437248] [2023-03-30 23:51:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:51:40,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 23:51:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:51:40,124 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-30 23:51:40,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 23:51:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:51:40,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-30 23:51:40,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 23:51:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:51:40,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 23:51:41,043 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:51:41,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447437248] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 23:51:41,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 23:51:41,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2023-03-30 23:51:41,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276303311] [2023-03-30 23:51:41,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 23:51:41,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-30 23:51:41,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:51:41,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-30 23:51:41,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-03-30 23:51:41,047 INFO L87 Difference]: Start difference. First operand 36533 states and 49480 transitions. Second operand has 12 states, 12 states have (on average 62.166666666666664) internal successors, (746), 10 states have internal predecessors, (746), 5 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7)