/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_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 23:49:42,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 23:49:42,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 23:49:42,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-30 23:49:42,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-30 23:49:42,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-30 23:49:42,957 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-30 23:49:42,960 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-30 23:49:42,961 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-30 23:49:42,965 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-30 23:49:42,967 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-30 23:49:42,968 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-30 23:49:42,968 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-30 23:49:42,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-30 23:49:42,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-30 23:49:42,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-30 23:49:42,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-30 23:49:42,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-30 23:49:42,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-30 23:49:42,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-30 23:49:42,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-30 23:49:42,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-30 23:49:42,985 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-30 23:49:42,986 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-30 23:49:42,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-30 23:49:42,998 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-30 23:49:42,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-30 23:49:43,000 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-30 23:49:43,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-30 23:49:43,001 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-30 23:49:43,001 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-30 23:49:43,002 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-30 23:49:43,002 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-30 23:49:43,002 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-30 23:49:43,003 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-30 23:49:43,003 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-30 23:49:43,005 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 23:49:43,030 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 23:49:43,031 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 23:49:43,031 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 23:49:43,031 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 23:49:43,032 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 23:49:43,032 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 23:49:43,032 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 23:49:43,032 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 23:49:43,034 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 23:49:43,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 23:49:43,035 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 23:49:43,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 23:49:43,036 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 23:49:43,036 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 23:49:43,036 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 23:49:43,036 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 23:49:43,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 23:49:43,036 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 23:49:43,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 23:49:43,036 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 23:49:43,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 23:49:43,037 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 23:49:43,037 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 23:49:43,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 23:49:43,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:49:43,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 23:49:43,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 23:49:43,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 23:49:43,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 23:49:43,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 23:49:43,038 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 23:49:43,038 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 23:49:43,038 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 23:49:43,039 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 23:49:43,039 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 23:49:43,039 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 23:49:43,264 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 23:49:43,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 23:49:43,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 23:49:43,293 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 23:49:43,294 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 23:49:43,295 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label33.c [2023-03-30 23:49:44,545 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 23:49:45,082 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 23:49:45,083 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label33.c [2023-03-30 23:49:45,137 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46df62844/1f9ace9f1fb7482ca2d0d99f2c72c823/FLAGf85bde230 [2023-03-30 23:49:45,154 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46df62844/1f9ace9f1fb7482ca2d0d99f2c72c823 [2023-03-30 23:49:45,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 23:49:45,158 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 23:49:45,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 23:49:45,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 23:49:45,165 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 23:49:45,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:49:45" (1/1) ... [2023-03-30 23:49:45,167 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72d43cb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:45, skipping insertion in model container [2023-03-30 23:49:45,167 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 11:49:45" (1/1) ... [2023-03-30 23:49:45,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 23:49:45,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 23:49:45,638 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_label33.c[5530,5543] [2023-03-30 23:49:46,716 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:49:46,731 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 23:49:46,760 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_label33.c[5530,5543] [2023-03-30 23:49:47,423 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 23:49:47,458 INFO L208 MainTranslator]: Completed translation [2023-03-30 23:49:47,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47 WrapperNode [2023-03-30 23:49:47,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 23:49:47,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 23:49:47,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 23:49:47,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 23:49:47,470 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (1/1) ... [2023-03-30 23:49:47,470 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (1/1) ... [2023-03-30 23:49:47,559 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (1/1) ... [2023-03-30 23:49:47,559 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (1/1) ... [2023-03-30 23:49:47,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (1/1) ... [2023-03-30 23:49:47,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (1/1) ... [2023-03-30 23:49:47,786 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (1/1) ... [2023-03-30 23:49:47,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (1/1) ... [2023-03-30 23:49:47,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 23:49:47,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 23:49:47,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 23:49:47,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 23:49:47,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (1/1) ... [2023-03-30 23:49:47,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 23:49:47,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 23:49:47,903 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 23:49:47,910 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 23:49:47,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 23:49:48,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 23:49:48,028 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 23:49:48,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-30 23:49:48,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-30 23:49:48,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-30 23:49:48,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-30 23:49:48,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-30 23:49:48,028 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-30 23:49:48,029 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-30 23:49:48,029 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-30 23:49:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 23:49:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 23:49:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 23:49:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 23:49:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 23:49:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 23:49:48,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 23:49:48,128 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 23:49:48,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 23:49:55,588 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 23:49:55,611 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 23:49:55,611 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-30 23:49:55,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:49:55 BoogieIcfgContainer [2023-03-30 23:49:55,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 23:49:55,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 23:49:55,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 23:49:55,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 23:49:55,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 11:49:45" (1/3) ... [2023-03-30 23:49:55,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746b1bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:49:55, skipping insertion in model container [2023-03-30 23:49:55,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 11:49:47" (2/3) ... [2023-03-30 23:49:55,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@746b1bfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 11:49:55, skipping insertion in model container [2023-03-30 23:49:55,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 11:49:55" (3/3) ... [2023-03-30 23:49:55,623 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label33.c [2023-03-30 23:49:55,638 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 23:49:55,639 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 23:49:55,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 23:49:55,735 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;@21914522, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 23:49:55,736 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 23:49:55,747 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 23:49:55,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-30 23:49:55,757 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:49:55,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 23:49:55,758 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:49:55,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:49:55,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1119552624, now seen corresponding path program 1 times [2023-03-30 23:49:55,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:49:55,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984530908] [2023-03-30 23:49:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:49:55,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:49:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:56,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:49:56,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:49:56,313 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 23:49:56,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:49:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984530908] [2023-03-30 23:49:56,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984530908] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:49:56,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:49:56,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 23:49:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666548934] [2023-03-30 23:49:56,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:49:56,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 23:49:56,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:49:56,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 23:49:56,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 23:49:56,349 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 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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 23:50:07,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:07,337 INFO L93 Difference]: Finished difference Result 5076 states and 9543 transitions. [2023-03-30 23:50:07,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-30 23:50:07,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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 47 [2023-03-30 23:50:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:07,376 INFO L225 Difference]: With dead ends: 5076 [2023-03-30 23:50:07,376 INFO L226 Difference]: Without dead ends: 3219 [2023-03-30 23:50:07,388 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 23:50:07,391 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 4647 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 1544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4647 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, 10.6s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:07,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4647 Valid, 384 Invalid, 8871 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1544 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2023-03-30 23:50:07,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3219 states. [2023-03-30 23:50:07,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3219 to 3194. [2023-03-30 23:50:07,577 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 23:50:07,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3194 states to 3194 states and 5073 transitions. [2023-03-30 23:50:07,596 INFO L78 Accepts]: Start accepts. Automaton has 3194 states and 5073 transitions. Word has length 47 [2023-03-30 23:50:07,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:07,598 INFO L495 AbstractCegarLoop]: Abstraction has 3194 states and 5073 transitions. [2023-03-30 23:50:07,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 14.333333333333334) internal successors, (43), 2 states have internal predecessors, (43), 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 23:50:07,599 INFO L276 IsEmpty]: Start isEmpty. Operand 3194 states and 5073 transitions. [2023-03-30 23:50:07,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-03-30 23:50:07,612 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:07,613 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:07,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 23:50:07,613 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:07,614 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:07,614 INFO L85 PathProgramCache]: Analyzing trace with hash -900429240, now seen corresponding path program 1 times [2023-03-30 23:50:07,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:07,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824750491] [2023-03-30 23:50:07,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:07,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:07,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:07,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:08,049 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:08,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:08,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824750491] [2023-03-30 23:50:08,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824750491] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:08,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:08,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-03-30 23:50:08,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627532481] [2023-03-30 23:50:08,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:08,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:50:08,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:08,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:50:08,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:50:08,056 INFO L87 Difference]: Start difference. First operand 3194 states and 5073 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 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 23:50:34,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 23:50:34,420 INFO L93 Difference]: Finished difference Result 20617 states and 33713 transitions. [2023-03-30 23:50:34,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 23:50:34,420 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 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 118 [2023-03-30 23:50:34,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 23:50:34,496 INFO L225 Difference]: With dead ends: 20617 [2023-03-30 23:50:34,496 INFO L226 Difference]: Without dead ends: 17429 [2023-03-30 23:50:34,512 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 23:50:34,514 INFO L413 NwaCegarLoop]: 286 mSDtfsCounter, 11623 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 28036 mSolverCounterSat, 3776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.8s 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, 25.4s IncrementalHoareTripleChecker+Time [2023-03-30 23:50:34,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11623 Valid, 1043 Invalid, 31812 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3776 Valid, 28036 Invalid, 0 Unknown, 0 Unchecked, 25.4s Time] [2023-03-30 23:50:34,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17429 states. [2023-03-30 23:50:34,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17429 to 17373. [2023-03-30 23:50:34,989 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 23:50:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17373 states to 17373 states and 23469 transitions. [2023-03-30 23:50:35,022 INFO L78 Accepts]: Start accepts. Automaton has 17373 states and 23469 transitions. Word has length 118 [2023-03-30 23:50:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 23:50:35,023 INFO L495 AbstractCegarLoop]: Abstraction has 17373 states and 23469 transitions. [2023-03-30 23:50:35,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 5 states have internal predecessors, (112), 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 23:50:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 17373 states and 23469 transitions. [2023-03-30 23:50:35,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-03-30 23:50:35,029 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 23:50:35,029 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 23:50:35,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 23:50:35,029 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 23:50:35,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 23:50:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash 286659168, now seen corresponding path program 1 times [2023-03-30 23:50:35,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 23:50:35,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028713244] [2023-03-30 23:50:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 23:50:35,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 23:50:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:35,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 23:50:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:35,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-03-30 23:50:35,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 23:50:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 23:50:35,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 23:50:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028713244] [2023-03-30 23:50:35,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028713244] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 23:50:35,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 23:50:35,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-03-30 23:50:35,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549377345] [2023-03-30 23:50:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 23:50:35,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-30 23:50:35,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 23:50:35,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-30 23:50:35,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-03-30 23:50:35,540 INFO L87 Difference]: Start difference. First operand 17373 states and 23469 transitions. Second operand has 7 states, 6 states have (on average 23.666666666666668) internal successors, (142), 4 states have internal predecessors, (142), 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)