/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/Problem12_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:01:21,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:01:21,284 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:01:21,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:01:21,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:01:21,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:01:21,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:01:21,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:01:21,341 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:01:21,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:01:21,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:01:21,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:01:21,344 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:01:21,349 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:01:21,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:01:21,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:01:21,351 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:01:21,351 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:01:21,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:01:21,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:01:21,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:01:21,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:01:21,362 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:01:21,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:01:21,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:01:21,372 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:01:21,372 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:01:21,373 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:01:21,374 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:01:21,374 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:01:21,374 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:01:21,375 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:01:21,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:01:21,376 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:01:21,377 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:01:21,377 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:01:21,378 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:01:21,378 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:01:21,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:01:21,379 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:01:21,379 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:01:21,382 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 22:01:21,416 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:01:21,416 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:01:21,417 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:01:21,417 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:01:21,418 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:01:21,418 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:01:21,418 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:01:21,419 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:01:21,419 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:01:21,419 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:01:21,419 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:01:21,420 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:01:21,420 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:01:21,420 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:01:21,420 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:01:21,420 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:01:21,420 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:01:21,420 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:01:21,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:01:21,421 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:01:21,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:01:21,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:01:21,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:01:21,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:01:21,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:01:21,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:01:21,422 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:01:21,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:01:21,422 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:01:21,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:01:21,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:01:21,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:01:21,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:21,423 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:01:21,423 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:01:21,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:01:21,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:01:21,424 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:01:21,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:01:21,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:01:21,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:01:21,424 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:01:21,669 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:01:21,699 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:01:21,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:01:21,703 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:01:21,704 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:01:21,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label56.c [2023-03-31 22:01:22,860 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:01:23,279 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:01:23,280 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label56.c [2023-03-31 22:01:23,309 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fbd2c6da/955b8e2b62704e38bc297fe410c1bb78/FLAGcc3031ba5 [2023-03-31 22:01:23,328 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fbd2c6da/955b8e2b62704e38bc297fe410c1bb78 [2023-03-31 22:01:23,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:01:23,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:01:23,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:23,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:01:23,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:01:23,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:23" (1/1) ... [2023-03-31 22:01:23,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e42765b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:23, skipping insertion in model container [2023-03-31 22:01:23,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:23" (1/1) ... [2023-03-31 22:01:23,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:01:23,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:01:23,739 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/Problem12_label56.c[6959,6972] [2023-03-31 22:01:24,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:24,504 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:01:24,534 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/Problem12_label56.c[6959,6972] [2023-03-31 22:01:24,963 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:24,984 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:01:24,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24 WrapperNode [2023-03-31 22:01:24,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:24,986 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:01:24,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:01:24,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:01:24,997 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (1/1) ... [2023-03-31 22:01:24,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (1/1) ... [2023-03-31 22:01:25,059 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (1/1) ... [2023-03-31 22:01:25,060 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (1/1) ... [2023-03-31 22:01:25,160 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (1/1) ... [2023-03-31 22:01:25,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (1/1) ... [2023-03-31 22:01:25,227 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (1/1) ... [2023-03-31 22:01:25,243 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (1/1) ... [2023-03-31 22:01:25,269 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:01:25,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:01:25,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:01:25,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:01:25,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (1/1) ... [2023-03-31 22:01:25,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:25,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:25,312 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 22:01:25,321 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 22:01:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:01:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:01:25,346 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:01:25,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:01:25,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:01:25,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:01:25,347 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:01:25,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:01:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:01:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:01:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:01:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:01:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:01:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:01:25,347 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:01:25,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:01:25,414 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:01:25,416 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:01:29,293 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:01:29,939 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:01:29,939 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:01:29,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:29 BoogieIcfgContainer [2023-03-31 22:01:29,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:01:29,945 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:01:29,945 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:01:29,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:01:29,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:01:23" (1/3) ... [2023-03-31 22:01:29,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2607fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:29, skipping insertion in model container [2023-03-31 22:01:29,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:24" (2/3) ... [2023-03-31 22:01:29,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e2607fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:29, skipping insertion in model container [2023-03-31 22:01:29,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:29" (3/3) ... [2023-03-31 22:01:29,950 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label56.c [2023-03-31 22:01:29,964 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:01:29,965 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:01:30,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:01:30,026 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;@6bc516ac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:01:30,026 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:01:30,034 INFO L276 IsEmpty]: Start isEmpty. Operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:01:30,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:01:30,040 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:30,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:30,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:30,045 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:30,045 INFO L85 PathProgramCache]: Analyzing trace with hash 636347330, now seen corresponding path program 1 times [2023-03-31 22:01:30,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:30,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742294521] [2023-03-31 22:01:30,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:30,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:30,413 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 22:01:30,414 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:30,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742294521] [2023-03-31 22:01:30,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742294521] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:30,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:30,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:01:30,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729982354] [2023-03-31 22:01:30,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:30,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:01:30,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:30,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:01:30,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:01:30,454 INFO L87 Difference]: Start difference. First operand has 694 states, 680 states have (on average 1.9764705882352942) internal successors, (1344), 681 states have internal predecessors, (1344), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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 22:01:33,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:33,493 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:01:33,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:01:33,495 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 22:01:33,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:33,515 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:01:33,515 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:01:33,523 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 22:01:33,526 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 846 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 884 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 884 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:33,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [846 Valid, 217 Invalid, 2879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [884 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-03-31 22:01:33,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:01:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-03-31 22:01:33,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.857037037037037) internal successors, (2507), 1350 states have internal predecessors, (2507), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2023-03-31 22:01:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2530 transitions. [2023-03-31 22:01:33,645 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2530 transitions. Word has length 11 [2023-03-31 22:01:33,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:33,646 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2530 transitions. [2023-03-31 22:01:33,647 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 22:01:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2530 transitions. [2023-03-31 22:01:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-03-31 22:01:33,649 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:33,649 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] [2023-03-31 22:01:33,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:01:33,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:33,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:33,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1382039322, now seen corresponding path program 1 times [2023-03-31 22:01:33,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:33,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742762967] [2023-03-31 22:01:33,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:33,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:33,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:33,841 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 22:01:33,841 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:33,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742762967] [2023-03-31 22:01:33,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742762967] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:33,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:33,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:33,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814050658] [2023-03-31 22:01:33,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:33,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:33,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:33,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:33,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:33,845 INFO L87 Difference]: Start difference. First operand 1368 states and 2530 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 22:01:37,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:37,686 INFO L93 Difference]: Finished difference Result 4138 states and 7702 transitions. [2023-03-31 22:01:37,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:37,687 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 25 [2023-03-31 22:01:37,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:37,703 INFO L225 Difference]: With dead ends: 4138 [2023-03-31 22:01:37,704 INFO L226 Difference]: Without dead ends: 2775 [2023-03-31 22:01:37,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:01:37,717 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 2488 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 3906 mSolverCounterSat, 910 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 4816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 910 IncrementalHoareTripleChecker+Valid, 3906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:37,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2488 Valid, 118 Invalid, 4816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [910 Valid, 3906 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-03-31 22:01:37,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2775 states. [2023-03-31 22:01:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2775 to 2757. [2023-03-31 22:01:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2757 states, 2715 states have (on average 1.6976058931860036) internal successors, (4609), 2719 states have internal predecessors, (4609), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (77), 22 states have call predecessors, (77), 14 states have call successors, (77) [2023-03-31 22:01:37,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2757 states to 2757 states and 4701 transitions. [2023-03-31 22:01:37,824 INFO L78 Accepts]: Start accepts. Automaton has 2757 states and 4701 transitions. Word has length 25 [2023-03-31 22:01:37,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:37,825 INFO L495 AbstractCegarLoop]: Abstraction has 2757 states and 4701 transitions. [2023-03-31 22:01:37,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 22:01:37,825 INFO L276 IsEmpty]: Start isEmpty. Operand 2757 states and 4701 transitions. [2023-03-31 22:01:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 22:01:37,826 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:37,826 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] [2023-03-31 22:01:37,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:01:37,826 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:37,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:37,827 INFO L85 PathProgramCache]: Analyzing trace with hash -979679307, now seen corresponding path program 1 times [2023-03-31 22:01:37,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:37,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40677931] [2023-03-31 22:01:37,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:37,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:38,017 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 22:01:38,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:38,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40677931] [2023-03-31 22:01:38,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40677931] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:38,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:38,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:38,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478201775] [2023-03-31 22:01:38,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:38,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:38,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:38,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:38,022 INFO L87 Difference]: Start difference. First operand 2757 states and 4701 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 22:01:41,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:41,539 INFO L93 Difference]: Finished difference Result 7729 states and 13220 transitions. [2023-03-31 22:01:41,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:41,541 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 30 [2023-03-31 22:01:41,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:41,567 INFO L225 Difference]: With dead ends: 7729 [2023-03-31 22:01:41,567 INFO L226 Difference]: Without dead ends: 4977 [2023-03-31 22:01:41,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:01:41,579 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 2452 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 1261 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2452 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1261 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:41,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2452 Valid, 95 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1261 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 22:01:41,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4977 states. [2023-03-31 22:01:41,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4977 to 4896. [2023-03-31 22:01:41,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4789 states have (on average 1.579661724785968) internal successors, (7565), 4809 states have internal predecessors, (7565), 24 states have call successors, (24), 24 states have call predecessors, (24), 82 states have return successors, (335), 62 states have call predecessors, (335), 23 states have call successors, (335) [2023-03-31 22:01:41,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 7924 transitions. [2023-03-31 22:01:41,726 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 7924 transitions. Word has length 30 [2023-03-31 22:01:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:41,727 INFO L495 AbstractCegarLoop]: Abstraction has 4896 states and 7924 transitions. [2023-03-31 22:01:41,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 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 22:01:41,727 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 7924 transitions. [2023-03-31 22:01:41,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-03-31 22:01:41,729 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:41,729 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:41,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:01:41,729 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:41,730 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:41,730 INFO L85 PathProgramCache]: Analyzing trace with hash 56759654, now seen corresponding path program 1 times [2023-03-31 22:01:41,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:41,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173169807] [2023-03-31 22:01:41,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:41,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:41,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:41,848 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173169807] [2023-03-31 22:01:41,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173169807] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:01:41,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584448263] [2023-03-31 22:01:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:41,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:41,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:41,857 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 22:01:41,874 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 22:01:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:41,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:01:41,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:01:42,082 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:42,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:01:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:01:42,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584448263] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:01:42,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280717977] [2023-03-31 22:01:42,191 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2023-03-31 22:01:42,191 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:01:42,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:01:42,198 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:01:42,198 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:01:42,349 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 22:01:42,571 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2023-03-31 22:01:42,836 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2023-03-31 22:01:43,353 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 49 for LOIs [2023-03-31 22:01:43,529 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 50 [2023-03-31 22:01:44,785 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 11 [2023-03-31 22:01:44,882 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 19050 conjuctions. This might take some time... [2023-03-31 22:01:47,216 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 1200 conjuctions.