/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_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:49:04,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:49:04,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:49:04,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:49:04,135 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:49:04,137 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:49:04,140 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:49:04,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:49:04,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:49:04,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:49:04,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:49:04,151 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:49:04,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:49:04,153 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:49:04,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:49:04,155 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:49:04,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:49:04,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:49:04,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:49:04,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:49:04,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:49:04,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:49:04,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:49:04,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:49:04,176 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:49:04,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:49:04,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:49:04,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:49:04,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:49:04,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:49:04,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:49:04,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:49:04,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:49:04,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:49:04,184 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:49:04,184 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:49:04,186 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 23:49:04,214 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:49:04,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:49:04,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:49:04,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:49:04,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:49:04,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:49:04,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:49:04,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:49:04,217 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:49:04,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:49:04,218 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:49:04,218 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:49:04,218 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:49:04,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:49:04,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:49:04,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:49:04,219 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:49:04,219 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:49:04,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:49:04,219 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:49:04,220 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:49:04,220 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:49:04,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:49:04,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:49:04,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:49:04,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:49:04,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:49:04,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:49:04,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:49:04,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:49:04,221 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:49:04,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:49:04,222 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:49:04,222 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:49:04,222 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:49:04,222 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:49:04,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:49:04,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:49:04,476 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:49:04,477 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:49:04,477 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:49:04,478 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label24.c [2023-03-30 23:49:05,634 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:49:06,217 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:49:06,218 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label24.c [2023-03-30 23:49:06,262 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be2643795/860f2870dbd941a6a8cc42a4df81dbfb/FLAG308142547 [2023-03-30 23:49:06,277 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be2643795/860f2870dbd941a6a8cc42a4df81dbfb [2023-03-30 23:49:06,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:49:06,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:49:06,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:49:06,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:49:06,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:49:06,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:49:06" (1/1) ... [2023-03-30 23:49:06,297 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386f4c3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:06, skipping insertion in model container [2023-03-30 23:49:06,297 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:49:06" (1/1) ... [2023-03-30 23:49:06,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:49:06,482 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:49:06,734 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_label24.c[6032,6045] [2023-03-30 23:49:07,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:49:07,794 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:49:07,823 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_label24.c[6032,6045] [2023-03-30 23:49:08,511 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:49:08,544 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:49:08,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08 WrapperNode [2023-03-30 23:49:08,544 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:49:08,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:49:08,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:49:08,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:49:08,556 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (1/1) ... [2023-03-30 23:49:08,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (1/1) ... [2023-03-30 23:49:08,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (1/1) ... [2023-03-30 23:49:08,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (1/1) ... [2023-03-30 23:49:08,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (1/1) ... [2023-03-30 23:49:08,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (1/1) ... [2023-03-30 23:49:08,937 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (1/1) ... [2023-03-30 23:49:08,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (1/1) ... [2023-03-30 23:49:09,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:49:09,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:49:09,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:49:09,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:49:09,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (1/1) ... [2023-03-30 23:49:09,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:49:09,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:49:09,062 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 23:49:09,073 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 23:49:09,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:49:09,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:49:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:49:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:49:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:49:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:49:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:49:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:49:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:49:09,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:49:09,103 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:49:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:49:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:49:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:49:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:49:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:49:09,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:49:09,202 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:49:09,205 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:49:16,427 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:49:16,450 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:49:16,450 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:49:16,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:49:16 BoogieIcfgContainer [2023-03-30 23:49:16,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:49:16,457 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:49:16,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:49:16,460 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:49:16,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:49:06" (1/3) ... [2023-03-30 23:49:16,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bbcdc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:49:16, skipping insertion in model container [2023-03-30 23:49:16,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:08" (2/3) ... [2023-03-30 23:49:16,461 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67bbcdc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:49:16, skipping insertion in model container [2023-03-30 23:49:16,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:49:16" (3/3) ... [2023-03-30 23:49:16,462 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label24.c [2023-03-30 23:49:16,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:49:16,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:49:16,547 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:49:16,552 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;@5cd05548, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:49:16,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:49:16,562 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 23:49:16,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-03-30 23:49:16,570 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:16,571 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:16,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:16,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1118591616, now seen corresponding path program 1 times [2023-03-30 23:49:16,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:16,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494406194] [2023-03-30 23:49:16,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:16,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:17,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:17,124 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 23:49:17,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:17,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494406194] [2023-03-30 23:49:17,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494406194] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:17,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:17,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 23:49:17,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094602953] [2023-03-30 23:49:17,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:17,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-30 23:49:17,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:17,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-30 23:49:17,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-30 23:49:17,185 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 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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 23:49:28,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:28,273 INFO L93 Difference]: Finished difference Result 5086 states and 9561 transitions. [2023-03-30 23:49:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:49:28,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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 51 [2023-03-30 23:49:28,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:28,310 INFO L225 Difference]: With dead ends: 5086 [2023-03-30 23:49:28,311 INFO L226 Difference]: Without dead ends: 3245 [2023-03-30 23:49:28,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-03-30 23:49:28,328 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 4978 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 9242 mSolverCounterSat, 1365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4978 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 10607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1365 IncrementalHoareTripleChecker+Valid, 9242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:28,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4978 Valid, 376 Invalid, 10607 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1365 Valid, 9242 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2023-03-30 23:49:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2023-03-30 23:49:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 3178. [2023-03-30 23:49:28,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3178 states, 3142 states have (on average 1.846594525779758) internal successors, (5802), 3144 states have internal predecessors, (5802), 14 states have call successors, (14), 14 states have call predecessors, (14), 21 states have return successors, (33), 19 states have call predecessors, (33), 13 states have call successors, (33) [2023-03-30 23:49:28,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3178 states to 3178 states and 5849 transitions. [2023-03-30 23:49:28,512 INFO L78 Accepts]: Start accepts. Automaton has 3178 states and 5849 transitions. Word has length 51 [2023-03-30 23:49:28,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:28,514 INFO L495 AbstractCegarLoop]: Abstraction has 3178 states and 5849 transitions. [2023-03-30 23:49:28,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 11.75) internal successors, (47), 3 states have internal predecessors, (47), 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 23:49:28,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3178 states and 5849 transitions. [2023-03-30 23:49:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-03-30 23:49:28,522 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:28,523 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, 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] [2023-03-30 23:49:28,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:49:28,523 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:28,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1652445288, now seen corresponding path program 1 times [2023-03-30 23:49:28,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:28,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287966185] [2023-03-30 23:49:28,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:28,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:28,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:28,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:28,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:28,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:28,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287966185] [2023-03-30 23:49:28,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287966185] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:28,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:28,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:49:28,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766743198] [2023-03-30 23:49:28,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:28,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:49:28,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:28,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:49:28,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:49:28,885 INFO L87 Difference]: Start difference. First operand 3178 states and 5849 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 5 states have internal predecessors, (116), 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 23:49:49,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:49:49,203 INFO L93 Difference]: Finished difference Result 16333 states and 30897 transitions. [2023-03-30 23:49:49,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:49:49,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 5 states have internal predecessors, (116), 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 122 [2023-03-30 23:49:49,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:49:49,275 INFO L225 Difference]: With dead ends: 16333 [2023-03-30 23:49:49,276 INFO L226 Difference]: Without dead ends: 13161 [2023-03-30 23:49:49,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2023-03-30 23:49:49,292 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 21915 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 15086 mSolverCounterSat, 5200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21915 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 20286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5200 IncrementalHoareTripleChecker+Valid, 15086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.5s IncrementalHoareTripleChecker+Time [2023-03-30 23:49:49,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21915 Valid, 1035 Invalid, 20286 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5200 Valid, 15086 Invalid, 0 Unknown, 0 Unchecked, 19.5s Time] [2023-03-30 23:49:49,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13161 states. [2023-03-30 23:49:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13161 to 13115. [2023-03-30 23:49:49,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13115 states, 12949 states have (on average 1.535794269827786) internal successors, (19887), 12958 states have internal predecessors, (19887), 56 states have call successors, (56), 56 states have call predecessors, (56), 109 states have return successors, (550), 100 states have call predecessors, (550), 55 states have call successors, (550) [2023-03-30 23:49:49,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13115 states to 13115 states and 20493 transitions. [2023-03-30 23:49:49,628 INFO L78 Accepts]: Start accepts. Automaton has 13115 states and 20493 transitions. Word has length 122 [2023-03-30 23:49:49,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:49:49,630 INFO L495 AbstractCegarLoop]: Abstraction has 13115 states and 20493 transitions. [2023-03-30 23:49:49,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 5 states have internal predecessors, (116), 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 23:49:49,631 INFO L276 IsEmpty]: Start isEmpty. Operand 13115 states and 20493 transitions. [2023-03-30 23:49:49,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-03-30 23:49:49,635 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:49,635 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, 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] [2023-03-30 23:49:49,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:49:49,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:49,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:49,637 INFO L85 PathProgramCache]: Analyzing trace with hash -911182940, now seen corresponding path program 1 times [2023-03-30 23:49:49,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:49,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475825249] [2023-03-30 23:49:49,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:49,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:49,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:49,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:49:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:49:50,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:50,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475825249] [2023-03-30 23:49:50,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475825249] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:50,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:50,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:49:50,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276862943] [2023-03-30 23:49:50,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:50,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:49:50,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:50,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:49:50,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:49:50,189 INFO L87 Difference]: Start difference. First operand 13115 states and 20493 transitions. Second operand has 7 states, 6 states have (on average 24.5) internal successors, (147), 4 states have internal predecessors, (147), 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)