/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_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:49:55,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:49:55,404 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:49:55,437 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:49:55,438 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:49:55,439 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:49:55,440 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:49:55,441 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:49:55,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:49:55,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:49:55,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:49:55,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:49:55,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:49:55,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:49:55,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:49:55,447 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:49:55,448 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:49:55,449 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:49:55,450 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:49:55,452 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:49:55,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:49:55,454 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:49:55,455 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:49:55,455 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:49:55,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:49:55,461 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:49:55,462 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:49:55,463 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:49:55,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:49:55,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:49:55,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:49:55,465 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:49:55,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:49:55,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:49:55,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:49:55,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:49:55,467 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 23:49:55,493 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:49:55,493 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:49:55,493 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:49:55,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:49:55,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:49:55,495 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:49:55,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:49:55,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:49:55,496 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:49:55,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:49:55,496 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:49:55,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:49:55,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:49:55,497 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:49:55,497 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:49:55,497 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:49:55,497 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:49:55,497 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:49:55,498 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:49:55,498 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:49:55,498 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:49:55,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:49:55,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:49:55,498 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:49:55,498 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:49:55,498 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:49:55,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:49:55,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:49:55,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:49:55,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:49:55,499 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:49:55,499 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:49:55,499 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:49:55,500 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:49:55,500 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:49:55,500 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:49:55,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:49:55,764 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:49:55,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:49:55,767 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:49:55,768 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:49:55,769 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label36.c [2023-03-30 23:49:56,843 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:49:57,425 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:49:57,425 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label36.c [2023-03-30 23:49:57,469 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed79b6a03/7e1bb7b2350a46b2b2f513f588b4864b/FLAGbca36b699 [2023-03-30 23:49:57,484 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed79b6a03/7e1bb7b2350a46b2b2f513f588b4864b [2023-03-30 23:49:57,486 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:49:57,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:49:57,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:49:57,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:49:57,496 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:49:57,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:49:57" (1/1) ... [2023-03-30 23:49:57,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3be4ee21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:57, skipping insertion in model container [2023-03-30 23:49:57,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:49:57" (1/1) ... [2023-03-30 23:49:57,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:49:57,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:49:58,002 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_label36.c[4552,4565] [2023-03-30 23:49:59,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:49:59,149 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:49:59,175 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_label36.c[4552,4565] [2023-03-30 23:49:59,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:49:59,862 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:49:59,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59 WrapperNode [2023-03-30 23:49:59,864 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:49:59,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:49:59,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:49:59,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:49:59,875 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (1/1) ... [2023-03-30 23:49:59,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (1/1) ... [2023-03-30 23:49:59,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (1/1) ... [2023-03-30 23:49:59,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (1/1) ... [2023-03-30 23:50:00,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (1/1) ... [2023-03-30 23:50:00,138 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (1/1) ... [2023-03-30 23:50:00,195 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (1/1) ... [2023-03-30 23:50:00,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (1/1) ... [2023-03-30 23:50:00,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:50:00,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:50:00,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:50:00,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:50:00,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (1/1) ... [2023-03-30 23:50:00,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:50:00,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:50:00,330 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 23:50:00,353 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 23:50:00,370 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:50:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:50:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:50:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:50:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:50:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:50:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:50:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:50:00,371 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:50:00,372 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:50:00,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:50:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:50:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:50:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:50:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:50:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:50:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:50:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:50:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:50:00,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:50:00,458 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:50:00,459 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:50:07,622 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:50:07,640 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:50:07,640 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:50:07,644 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:07 BoogieIcfgContainer [2023-03-30 23:50:07,644 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:50:07,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:50:07,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:50:07,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:50:07,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:49:57" (1/3) ... [2023-03-30 23:50:07,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9c0515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:07, skipping insertion in model container [2023-03-30 23:50:07,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:59" (2/3) ... [2023-03-30 23:50:07,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e9c0515 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:50:07, skipping insertion in model container [2023-03-30 23:50:07,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:50:07" (3/3) ... [2023-03-30 23:50:07,651 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label36.c [2023-03-30 23:50:07,667 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:50:07,667 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:50:07,762 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:50:07,768 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;@62788282, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:50:07,768 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:50:07,778 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 23:50:07,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-03-30 23:50:07,785 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:07,785 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] [2023-03-30 23:50:07,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:07,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:07,790 INFO L85 PathProgramCache]: Analyzing trace with hash 850510416, now seen corresponding path program 1 times [2023-03-30 23:50:07,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:07,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662890935] [2023-03-30 23:50:07,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:07,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:07,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:08,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:08,391 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 23:50:08,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:08,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662890935] [2023-03-30 23:50:08,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662890935] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:08,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:08,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:50:08,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381837616] [2023-03-30 23:50:08,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:08,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:50:08,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:08,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:50:08,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:50:08,436 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 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 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 23:50:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:19,890 INFO L93 Difference]: Finished difference Result 5076 states and 9543 transitions. [2023-03-30 23:50:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:50:19,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 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 39 [2023-03-30 23:50:19,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:19,928 INFO L225 Difference]: With dead ends: 5076 [2023-03-30 23:50:19,928 INFO L226 Difference]: Without dead ends: 3219 [2023-03-30 23:50:19,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:50:19,942 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4655 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 1544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4655 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1544 IncrementalHoareTripleChecker+Valid, 7327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:19,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4655 Valid, 384 Invalid, 8871 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1544 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2023-03-30 23:50:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-03-30 23:50:20,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3194. [2023-03-30 23:50:20,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3194 states, 3154 states have (on average 1.592263792010146) internal successors, (5022), 3156 states have internal predecessors, (5022), 14 states have call successors, (14), 14 states have call predecessors, (14), 25 states have return successors, (37), 23 states have call predecessors, (37), 13 states have call successors, (37) [2023-03-30 23:50:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5073 transitions. [2023-03-30 23:50:20,120 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5073 transitions. Word has length 39 [2023-03-30 23:50:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:20,121 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 5073 transitions. [2023-03-30 23:50:20,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 2 states have internal predecessors, (35), 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 23:50:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5073 transitions. [2023-03-30 23:50:20,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-03-30 23:50:20,125 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:20,126 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, 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] [2023-03-30 23:50:20,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:50:20,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:20,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:20,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1305337768, now seen corresponding path program 1 times [2023-03-30 23:50:20,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:20,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638584426] [2023-03-30 23:50:20,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:20,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:20,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:20,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:20,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638584426] [2023-03-30 23:50:20,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638584426] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:20,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:20,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:50:20,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562434757] [2023-03-30 23:50:20,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:20,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:50:20,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:20,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:50:20,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:50:20,567 INFO L87 Difference]: Start difference. First operand 3194 states and 5073 transitions. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 5 states have internal predecessors, (104), 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 23:50:47,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:47,224 INFO L93 Difference]: Finished difference Result 20617 states and 33713 transitions. [2023-03-30 23:50:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:50:47,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 5 states have internal predecessors, (104), 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 110 [2023-03-30 23:50:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:47,306 INFO L225 Difference]: With dead ends: 20617 [2023-03-30 23:50:47,307 INFO L226 Difference]: Without dead ends: 17429 [2023-03-30 23:50:47,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:50:47,325 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 11623 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 28036 mSolverCounterSat, 3776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11623 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 31812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3776 IncrementalHoareTripleChecker+Valid, 28036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:47,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11623 Valid, 1043 Invalid, 31812 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3776 Valid, 28036 Invalid, 0 Unknown, 0 Unchecked, 25.7s Time] [2023-03-30 23:50:47,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2023-03-30 23:50:47,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 17373. [2023-03-30 23:50:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17373 states, 17154 states have (on average 1.3166025416812406) internal successors, (22585), 17166 states have internal predecessors, (22585), 74 states have call successors, (74), 74 states have call predecessors, (74), 144 states have return successors, (810), 132 states have call predecessors, (810), 73 states have call successors, (810) [2023-03-30 23:50:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17373 states to 17373 states and 23469 transitions. [2023-03-30 23:50:47,733 INFO L78 Accepts]: Start accepts. Automaton has 17373 states and 23469 transitions. Word has length 110 [2023-03-30 23:50:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:47,735 INFO L495 AbstractCegarLoop]: Abstraction has 17373 states and 23469 transitions. [2023-03-30 23:50:47,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 5 states have internal predecessors, (104), 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 23:50:47,735 INFO L276 IsEmpty]: Start isEmpty. Operand 17373 states and 23469 transitions. [2023-03-30 23:50:47,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-03-30 23:50:47,742 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:47,743 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, 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] [2023-03-30 23:50:47,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:50:47,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:47,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:47,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1638981568, now seen corresponding path program 1 times [2023-03-30 23:50:47,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:47,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490568748] [2023-03-30 23:50:47,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:47,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:48,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:48,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:48,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:48,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490568748] [2023-03-30 23:50:48,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490568748] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:48,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:48,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:50:48,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541502024] [2023-03-30 23:50:48,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:48,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:50:48,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:48,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:50:48,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:50:48,246 INFO L87 Difference]: Start difference. First operand 17373 states and 23469 transitions. Second operand has 7 states, 6 states have (on average 22.333333333333332) internal successors, (134), 4 states have internal predecessors, (134), 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)