/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem19_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:33:25,087 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:33:25,089 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:33:25,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:33:25,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:33:25,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:33:25,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:33:25,130 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:33:25,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:33:25,135 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:33:25,136 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:33:25,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:33:25,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:33:25,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:33:25,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:33:25,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:33:25,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:33:25,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:33:25,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:33:25,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:33:25,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:33:25,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:33:25,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:33:25,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:33:25,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 22:33:25,161 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:33:25,162 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:33:25,163 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:33:25,163 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:33:25,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:33:25,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:33:25,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:33:25,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:33:25,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:33:25,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:33:25,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:33:25,166 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:33:25,188 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:33:25,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:33:25,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:33:25,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:33:25,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:33:25,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:33:25,189 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:33:25,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:33:25,189 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:33:25,189 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:33:25,190 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:33:25,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:33:25,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:33:25,190 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:33:25,190 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:33:25,190 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:33:25,190 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:33:25,191 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:33:25,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:33:25,191 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:33:25,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:33:25,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:33:25,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:33:25,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:33:25,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:33:25,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:33:25,192 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:33:25,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:33:25,192 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:33:25,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:33:25,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:33:25,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:33:25,193 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:33:25,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:33:25,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:33:25,410 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:33:25,410 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:33:25,411 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:33:25,412 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label56.c [2023-03-31 22:33:26,395 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:33:26,805 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:33:26,806 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label56.c [2023-03-31 22:33:26,844 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b4d6857/ee5d6d332e4c40ec9c0b7931f65efd9d/FLAG8cad1ce05 [2023-03-31 22:33:26,856 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b4d6857/ee5d6d332e4c40ec9c0b7931f65efd9d [2023-03-31 22:33:26,858 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:33:26,860 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:33:26,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:33:26,862 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:33:26,864 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:33:26,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:33:26" (1/1) ... [2023-03-31 22:33:26,866 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@227f94f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:26, skipping insertion in model container [2023-03-31 22:33:26,866 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:33:26" (1/1) ... [2023-03-31 22:33:26,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:33:26,987 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:33:27,161 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_label56.c[6747,6760] [2023-03-31 22:33:27,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:33:27,972 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:33:28,006 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_label56.c[6747,6760] [2023-03-31 22:33:28,485 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:33:28,510 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:33:28,510 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28 WrapperNode [2023-03-31 22:33:28,511 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:33:28,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:33:28,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:33:28,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:33:28,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (1/1) ... [2023-03-31 22:33:28,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (1/1) ... [2023-03-31 22:33:28,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (1/1) ... [2023-03-31 22:33:28,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (1/1) ... [2023-03-31 22:33:28,750 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (1/1) ... [2023-03-31 22:33:28,785 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (1/1) ... [2023-03-31 22:33:28,825 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (1/1) ... [2023-03-31 22:33:28,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (1/1) ... [2023-03-31 22:33:28,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:33:28,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:33:28,913 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:33:28,913 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:33:28,914 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (1/1) ... [2023-03-31 22:33:28,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:33:28,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:33:28,938 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:33:28,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output5 [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output6 [2023-03-31 22:33:29,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:33:29,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:33:29,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:33:29,007 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output5 [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output6 [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:33:29,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:33:29,086 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:33:29,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:33:34,968 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:33:48,520 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:33:48,520 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:33:48,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:33:48 BoogieIcfgContainer [2023-03-31 22:33:48,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:33:48,526 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:33:48,526 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:33:48,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:33:48,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:33:26" (1/3) ... [2023-03-31 22:33:48,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bce8909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:33:48, skipping insertion in model container [2023-03-31 22:33:48,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:33:28" (2/3) ... [2023-03-31 22:33:48,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bce8909 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:33:48, skipping insertion in model container [2023-03-31 22:33:48,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:33:48" (3/3) ... [2023-03-31 22:33:48,530 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem19_label56.c [2023-03-31 22:33:48,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:33:48,543 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:33:48,592 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:33:48,597 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=FINITE_AUTOMATA, 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;@3d918d89, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:33:48,597 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:33:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 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) [2023-03-31 22:33:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:33:48,608 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:48,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:33:48,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:48,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:48,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1235903459, now seen corresponding path program 1 times [2023-03-31 22:33:48,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:48,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078044278] [2023-03-31 22:33:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:48,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:48,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:33:48,859 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078044278] [2023-03-31 22:33:48,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078044278] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:48,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:48,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:33:48,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709969883] [2023-03-31 22:33:48,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:48,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:33:48,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:48,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:33:48,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:33:48,892 INFO L87 Difference]: Start difference. First operand has 1144 states, 1126 states have (on average 1.980461811722913) internal successors, (2230), 1127 states have internal predecessors, (2230), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-03-31 22:33:54,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:33:54,182 INFO L93 Difference]: Finished difference Result 3418 states and 6741 transitions. [2023-03-31 22:33:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:33:54,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2023-03-31 22:33:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:33:54,210 INFO L225 Difference]: With dead ends: 3418 [2023-03-31 22:33:54,211 INFO L226 Difference]: Without dead ends: 2271 [2023-03-31 22:33:54,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:33:54,222 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1292 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 1820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1292 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 5087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1820 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:33:54,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1292 Valid, 239 Invalid, 5087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1820 Valid, 3267 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2023-03-31 22:33:54,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2023-03-31 22:33:54,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2265. [2023-03-31 22:33:54,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2265 states, 2239 states have (on average 1.9004019651630193) internal successors, (4255), 2239 states have internal predecessors, (4255), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2023-03-31 22:33:54,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2265 states to 2265 states and 4290 transitions. [2023-03-31 22:33:54,356 INFO L78 Accepts]: Start accepts. Automaton has 2265 states and 4290 transitions. Word has length 11 [2023-03-31 22:33:54,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:33:54,357 INFO L495 AbstractCegarLoop]: Abstraction has 2265 states and 4290 transitions. [2023-03-31 22:33:54,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-03-31 22:33:54,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2265 states and 4290 transitions. [2023-03-31 22:33:54,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-03-31 22:33:54,361 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:33:54,361 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-03-31 22:33:54,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:33:54,361 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:33:54,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:33:54,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1122640181, now seen corresponding path program 1 times [2023-03-31 22:33:54,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:33:54,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405836939] [2023-03-31 22:33:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:33:54,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:33:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:33:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:33:54,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:33:54,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405836939] [2023-03-31 22:33:54,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405836939] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:33:54,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:33:54,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:33:54,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138293337] [2023-03-31 22:33:54,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:33:54,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:33:54,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:33:54,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:33:54,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:33:54,679 INFO L87 Difference]: Start difference. First operand 2265 states and 4290 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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) [2023-03-31 22:34:02,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:34:02,225 INFO L93 Difference]: Finished difference Result 6873 states and 13056 transitions. [2023-03-31 22:34:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:34:02,225 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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 47 [2023-03-31 22:34:02,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:34:02,250 INFO L225 Difference]: With dead ends: 6873 [2023-03-31 22:34:02,250 INFO L226 Difference]: Without dead ends: 4613 [2023-03-31 22:34:02,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:34:02,255 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 3698 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 7246 mSolverCounterSat, 1323 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3698 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 8569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1323 IncrementalHoareTripleChecker+Valid, 7246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:34:02,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3698 Valid, 139 Invalid, 8569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1323 Valid, 7246 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-03-31 22:34:02,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2023-03-31 22:34:02,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4575. [2023-03-31 22:34:02,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 4509 states have (on average 1.5917054779330229) internal successors, (7177), 4513 states have internal predecessors, (7177), 23 states have call successors, (23), 23 states have call predecessors, (23), 42 states have return successors, (122), 38 states have call predecessors, (122), 22 states have call successors, (122) [2023-03-31 22:34:02,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 7322 transitions. [2023-03-31 22:34:02,350 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 7322 transitions. Word has length 47 [2023-03-31 22:34:02,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:34:02,351 INFO L495 AbstractCegarLoop]: Abstraction has 4575 states and 7322 transitions. [2023-03-31 22:34:02,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 4 states have internal predecessors, (41), 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) [2023-03-31 22:34:02,351 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 7322 transitions. [2023-03-31 22:34:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-03-31 22:34:02,355 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:34:02,355 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2023-03-31 22:34:02,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:34:02,356 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:34:02,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:34:02,357 INFO L85 PathProgramCache]: Analyzing trace with hash 229198256, now seen corresponding path program 1 times [2023-03-31 22:34:02,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:34:02,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397895222] [2023-03-31 22:34:02,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:34:02,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:34:02,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:34:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:34:02,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:34:02,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397895222] [2023-03-31 22:34:02,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397895222] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:34:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289008767] [2023-03-31 22:34:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:34:02,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:34:02,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:34:02,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:34:02,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:34:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:34:02,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:34:02,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:34:02,764 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:34:02,764 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:34:02,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289008767] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:34:02,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:34:02,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-03-31 22:34:02,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668426015] [2023-03-31 22:34:02,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:34:02,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:34:02,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:34:02,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:34:02,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:34:02,769 INFO L87 Difference]: Start difference. First operand 4575 states and 7322 transitions. Second operand has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:34:09,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:34:09,566 INFO L93 Difference]: Finished difference Result 14085 states and 22931 transitions. [2023-03-31 22:34:09,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:34:09,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 57 [2023-03-31 22:34:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:34:09,601 INFO L225 Difference]: With dead ends: 14085 [2023-03-31 22:34:09,601 INFO L226 Difference]: Without dead ends: 9515 [2023-03-31 22:34:09,612 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-03-31 22:34:09,612 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 4043 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 5945 mSolverCounterSat, 2439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4043 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 8384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2439 IncrementalHoareTripleChecker+Valid, 5945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-03-31 22:34:09,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4043 Valid, 157 Invalid, 8384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2439 Valid, 5945 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-03-31 22:34:09,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9515 states. [2023-03-31 22:34:09,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9515 to 9355. [2023-03-31 22:34:09,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9355 states, 9149 states have (on average 1.3785113127117719) internal successors, (12612), 9177 states have internal predecessors, (12612), 43 states have call successors, (43), 43 states have call predecessors, (43), 162 states have return successors, (619), 134 states have call predecessors, (619), 42 states have call successors, (619) [2023-03-31 22:34:09,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9355 states to 9355 states and 13274 transitions. [2023-03-31 22:34:09,839 INFO L78 Accepts]: Start accepts. Automaton has 9355 states and 13274 transitions. Word has length 57 [2023-03-31 22:34:09,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:34:09,839 INFO L495 AbstractCegarLoop]: Abstraction has 9355 states and 13274 transitions. [2023-03-31 22:34:09,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.0) internal successors, (45), 4 states have internal predecessors, (45), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:34:09,840 INFO L276 IsEmpty]: Start isEmpty. Operand 9355 states and 13274 transitions. [2023-03-31 22:34:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-03-31 22:34:09,845 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:34:09,845 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:34:09,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:34:10,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:34:10,050 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:34:10,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:34:10,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1316413571, now seen corresponding path program 1 times [2023-03-31 22:34:10,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:34:10,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495467412] [2023-03-31 22:34:10,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:34:10,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:34:10,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:34:10,233 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 22:34:10,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:34:10,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495467412] [2023-03-31 22:34:10,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495467412] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:34:10,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868809106] [2023-03-31 22:34:10,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:34:10,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:34:10,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:34:10,237 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:34:10,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:34:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:34:10,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:34:10,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:34:10,391 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 22:34:10,391 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:34:10,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868809106] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:34:10,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:34:10,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:34:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655102500] [2023-03-31 22:34:10,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:34:10,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:34:10,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:34:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:34:10,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:34:10,395 INFO L87 Difference]: Start difference. First operand 9355 states and 13274 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:34:16,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:34:16,819 INFO L93 Difference]: Finished difference Result 28531 states and 42490 transitions. [2023-03-31 22:34:16,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:34:16,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 72 [2023-03-31 22:34:16,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:34:16,888 INFO L225 Difference]: With dead ends: 28531 [2023-03-31 22:34:16,888 INFO L226 Difference]: Without dead ends: 19181 [2023-03-31 22:34:16,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:34:16,915 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 3499 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 6928 mSolverCounterSat, 1511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3499 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 8439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1511 IncrementalHoareTripleChecker+Valid, 6928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:34:16,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3499 Valid, 148 Invalid, 8439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1511 Valid, 6928 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-03-31 22:34:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19181 states. [2023-03-31 22:34:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19181 to 17066. [2023-03-31 22:34:17,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17066 states, 16583 states have (on average 1.3869022492914431) internal successors, (22999), 16665 states have internal predecessors, (22999), 77 states have call successors, (77), 77 states have call predecessors, (77), 405 states have return successors, (2379), 323 states have call predecessors, (2379), 76 states have call successors, (2379) [2023-03-31 22:34:17,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17066 states to 17066 states and 25455 transitions. [2023-03-31 22:34:17,416 INFO L78 Accepts]: Start accepts. Automaton has 17066 states and 25455 transitions. Word has length 72 [2023-03-31 22:34:17,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:34:17,418 INFO L495 AbstractCegarLoop]: Abstraction has 17066 states and 25455 transitions. [2023-03-31 22:34:17,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 4 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:34:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 17066 states and 25455 transitions. [2023-03-31 22:34:17,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 22:34:17,427 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:34:17,428 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:34:17,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:34:17,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-03-31 22:34:17,633 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:34:17,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:34:17,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1731967303, now seen corresponding path program 1 times [2023-03-31 22:34:17,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:34:17,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569054293] [2023-03-31 22:34:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:34:17,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:34:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:34:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-03-31 22:34:17,834 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:34:17,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569054293] [2023-03-31 22:34:17,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569054293] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:34:17,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136948457] [2023-03-31 22:34:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:34:17,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:34:17,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:34:17,835 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:34:17,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:34:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:34:17,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:34:17,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:34:18,002 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-03-31 22:34:18,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:34:18,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136948457] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:34:18,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:34:18,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-03-31 22:34:18,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201891501] [2023-03-31 22:34:18,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:34:18,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:34:18,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:34:18,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:34:18,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:34:18,004 INFO L87 Difference]: Start difference. First operand 17066 states and 25455 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 4 states have internal predecessors, (58), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3)