/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_label51.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:01:06,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:01:06,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:01:06,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:01:06,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:01:06,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:01:06,214 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:01:06,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:01:06,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:01:06,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:01:06,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:01:06,225 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:01:06,225 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:01:06,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:01:06,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:01:06,229 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:01:06,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:01:06,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:01:06,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:01:06,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:01:06,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:01:06,240 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:01:06,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:01:06,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:01:06,250 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:01:06,250 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:01:06,251 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:01:06,252 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:01:06,252 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:01:06,253 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:01:06,253 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:01:06,254 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:01:06,255 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:01:06,255 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:01:06,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:01:06,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:01:06,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:01:06,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:01:06,257 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:01:06,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:01:06,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:01:06,259 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 22:01:06,288 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:01:06,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:01:06,289 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:01:06,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:01:06,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:01:06,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:01:06,290 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:01:06,290 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:01:06,290 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:01:06,290 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:01:06,291 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:01:06,291 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:01:06,291 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:01:06,291 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:01:06,291 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:01:06,292 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:01:06,292 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:01:06,292 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:01:06,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:01:06,293 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:01:06,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:01:06,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:01:06,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:01:06,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:01:06,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:01:06,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:01:06,293 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:01:06,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:01:06,294 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:01:06,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:01:06,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:01:06,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:01:06,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:06,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:01:06,295 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:01:06,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:01:06,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:01:06,295 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:01:06,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:01:06,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:01:06,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:01:06,295 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:01:06,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:01:06,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:01:06,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:01:06,530 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:01:06,531 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:01:06,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label51.c [2023-03-31 22:01:07,679 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:01:08,092 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:01:08,093 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label51.c [2023-03-31 22:01:08,126 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5074797e/217a2b5f35cf42af93bce5b5cc372c66/FLAGda4429f14 [2023-03-31 22:01:08,141 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5074797e/217a2b5f35cf42af93bce5b5cc372c66 [2023-03-31 22:01:08,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:01:08,145 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:01:08,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:08,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:01:08,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:01:08,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e9f978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:08, skipping insertion in model container [2023-03-31 22:01:08,156 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:01:08" (1/1) ... [2023-03-31 22:01:08,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:01:08,257 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:01:08,498 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_label51.c[1794,1807] [2023-03-31 22:01:09,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:09,242 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:01:09,261 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_label51.c[1794,1807] [2023-03-31 22:01:09,636 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:01:09,657 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:01:09,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09 WrapperNode [2023-03-31 22:01:09,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:01:09,660 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:01:09,660 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:01:09,660 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:01:09,670 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (1/1) ... [2023-03-31 22:01:09,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (1/1) ... [2023-03-31 22:01:09,710 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (1/1) ... [2023-03-31 22:01:09,710 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (1/1) ... [2023-03-31 22:01:09,796 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (1/1) ... [2023-03-31 22:01:09,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (1/1) ... [2023-03-31 22:01:09,841 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (1/1) ... [2023-03-31 22:01:09,854 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (1/1) ... [2023-03-31 22:01:09,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:01:09,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:01:09,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:01:09,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:01:09,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (1/1) ... [2023-03-31 22:01:09,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:01:09,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:09,926 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 22:01:09,948 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 22:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2023-03-31 22:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2023-03-31 22:01:09,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:01:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:01:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:01:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:01:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:01:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:01:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:01:10,054 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:01:10,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:01:13,724 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:01:14,318 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:01:14,319 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:01:14,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:14 BoogieIcfgContainer [2023-03-31 22:01:14,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:01:14,328 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:01:14,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:01:14,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:01:14,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:01:08" (1/3) ... [2023-03-31 22:01:14,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf444d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:14, skipping insertion in model container [2023-03-31 22:01:14,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:01:09" (2/3) ... [2023-03-31 22:01:14,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bf444d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:01:14, skipping insertion in model container [2023-03-31 22:01:14,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:01:14" (3/3) ... [2023-03-31 22:01:14,333 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem12_label51.c [2023-03-31 22:01:14,348 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:01:14,348 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:01:14,407 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:01:14,415 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;@5679b4d5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:01:14,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:01:14,425 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 22:01:14,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:01:14,431 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:14,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:14,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:14,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash 636334849, now seen corresponding path program 1 times [2023-03-31 22:01:14,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:14,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252567757] [2023-03-31 22:01:14,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:14,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:14,782 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 22:01:14,782 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252567757] [2023-03-31 22:01:14,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252567757] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:14,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:14,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:01:14,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54782597] [2023-03-31 22:01:14,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:14,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:01:14,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:14,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:01:14,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:01:14,827 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 22:01:18,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:18,188 INFO L93 Difference]: Finished difference Result 2068 states and 4065 transitions. [2023-03-31 22:01:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:01:18,192 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 22:01:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:18,223 INFO L225 Difference]: With dead ends: 2068 [2023-03-31 22:01:18,223 INFO L226 Difference]: Without dead ends: 1371 [2023-03-31 22:01:18,232 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 22:01:18,235 INFO L413 NwaCegarLoop]: 473 mSDtfsCounter, 725 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 2073 mSolverCounterSat, 632 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 2705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 632 IncrementalHoareTripleChecker+Valid, 2073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:18,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [725 Valid, 498 Invalid, 2705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [632 Valid, 2073 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-03-31 22:01:18,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-03-31 22:01:18,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1368. [2023-03-31 22:01:18,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1368 states, 1350 states have (on average 1.6511111111111112) internal successors, (2229), 1350 states have internal predecessors, (2229), 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 22:01:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1368 states to 1368 states and 2252 transitions. [2023-03-31 22:01:18,344 INFO L78 Accepts]: Start accepts. Automaton has 1368 states and 2252 transitions. Word has length 11 [2023-03-31 22:01:18,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:18,345 INFO L495 AbstractCegarLoop]: Abstraction has 1368 states and 2252 transitions. [2023-03-31 22:01:18,345 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 22:01:18,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1368 states and 2252 transitions. [2023-03-31 22:01:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 22:01:18,347 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:18,347 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] [2023-03-31 22:01:18,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:01:18,348 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:18,348 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:18,349 INFO L85 PathProgramCache]: Analyzing trace with hash -502352544, now seen corresponding path program 1 times [2023-03-31 22:01:18,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:18,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853274866] [2023-03-31 22:01:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:18,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:18,597 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 22:01:18,598 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:18,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853274866] [2023-03-31 22:01:18,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853274866] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:18,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:18,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:18,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828803658] [2023-03-31 22:01:18,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:18,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:18,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:18,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:18,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:18,601 INFO L87 Difference]: Start difference. First operand 1368 states and 2252 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 22:01:22,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:22,727 INFO L93 Difference]: Finished difference Result 4148 states and 6855 transitions. [2023-03-31 22:01:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:01:22,727 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 31 [2023-03-31 22:01:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:22,740 INFO L225 Difference]: With dead ends: 4148 [2023-03-31 22:01:22,740 INFO L226 Difference]: Without dead ends: 2785 [2023-03-31 22:01:22,743 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 22:01:22,744 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2645 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4201 mSolverCounterSat, 670 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2645 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 4871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 4201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:22,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2645 Valid, 89 Invalid, 4871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 4201 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-03-31 22:01:22,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2785 states. [2023-03-31 22:01:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2785 to 2756. [2023-03-31 22:01:22,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2714 states have (on average 1.4896831245394253) internal successors, (4043), 2718 states have internal predecessors, (4043), 15 states have call successors, (15), 15 states have call predecessors, (15), 26 states have return successors, (62), 22 states have call predecessors, (62), 14 states have call successors, (62) [2023-03-31 22:01:22,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 4120 transitions. [2023-03-31 22:01:22,840 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 4120 transitions. Word has length 31 [2023-03-31 22:01:22,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:22,840 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 4120 transitions. [2023-03-31 22:01:22,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 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 22:01:22,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 4120 transitions. [2023-03-31 22:01:22,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-03-31 22:01:22,842 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:22,842 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:22,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:01:22,843 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:22,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:22,843 INFO L85 PathProgramCache]: Analyzing trace with hash -432385583, now seen corresponding path program 1 times [2023-03-31 22:01:22,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:22,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160434611] [2023-03-31 22:01:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:23,028 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 22:01:23,028 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:23,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160434611] [2023-03-31 22:01:23,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160434611] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:23,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:01:23,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:01:23,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907355583] [2023-03-31 22:01:23,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:23,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:23,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:23,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:01:23,031 INFO L87 Difference]: Start difference. First operand 2756 states and 4120 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 22:01:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:26,537 INFO L93 Difference]: Finished difference Result 8417 states and 12813 transitions. [2023-03-31 22:01:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:26,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 60 [2023-03-31 22:01:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:26,568 INFO L225 Difference]: With dead ends: 8417 [2023-03-31 22:01:26,569 INFO L226 Difference]: Without dead ends: 5666 [2023-03-31 22:01:26,580 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 22:01:26,582 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 2402 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 3760 mSolverCounterSat, 1285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2402 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 5045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1285 IncrementalHoareTripleChecker+Valid, 3760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:26,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2402 Valid, 100 Invalid, 5045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1285 Valid, 3760 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-03-31 22:01:26,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2023-03-31 22:01:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 5604. [2023-03-31 22:01:26,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 5486 states have (on average 1.4279985417426175) internal successors, (7834), 5509 states have internal predecessors, (7834), 28 states have call successors, (28), 28 states have call predecessors, (28), 89 states have return successors, (297), 66 states have call predecessors, (297), 27 states have call successors, (297) [2023-03-31 22:01:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8159 transitions. [2023-03-31 22:01:26,730 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8159 transitions. Word has length 60 [2023-03-31 22:01:26,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:26,731 INFO L495 AbstractCegarLoop]: Abstraction has 5604 states and 8159 transitions. [2023-03-31 22:01:26,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 4 states have internal predecessors, (54), 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 22:01:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8159 transitions. [2023-03-31 22:01:26,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-03-31 22:01:26,740 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:26,740 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:01:26,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:01:26,740 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:26,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:26,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1794129308, now seen corresponding path program 1 times [2023-03-31 22:01:26,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:26,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970147880] [2023-03-31 22:01:26,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:26,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:27,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:01:27,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:27,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970147880] [2023-03-31 22:01:27,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970147880] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:01:27,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477387300] [2023-03-31 22:01:27,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:27,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:27,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:27,037 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 22:01:27,050 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 22:01:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:27,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:01:27,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:01:27,279 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:01:27,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:01:27,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477387300] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:01:27,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:01:27,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-03-31 22:01:27,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906320220] [2023-03-31 22:01:27,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:01:27,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:01:27,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:01:27,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:01:27,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:01:27,282 INFO L87 Difference]: Start difference. First operand 5604 states and 8159 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 22:01:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:01:31,108 INFO L93 Difference]: Finished difference Result 17003 states and 25456 transitions. [2023-03-31 22:01:31,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:01:31,108 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 74 [2023-03-31 22:01:31,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:01:31,154 INFO L225 Difference]: With dead ends: 17003 [2023-03-31 22:01:31,155 INFO L226 Difference]: Without dead ends: 11404 [2023-03-31 22:01:31,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-03-31 22:01:31,167 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2205 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 4594 mSolverCounterSat, 980 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2205 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 5574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 980 IncrementalHoareTripleChecker+Valid, 4594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:01:31,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2205 Valid, 93 Invalid, 5574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [980 Valid, 4594 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-03-31 22:01:31,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2023-03-31 22:01:31,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 11316. [2023-03-31 22:01:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11316 states, 11031 states have (on average 1.3050494062188378) internal successors, (14396), 11099 states have internal predecessors, (14396), 52 states have call successors, (52), 52 states have call predecessors, (52), 232 states have return successors, (1084), 164 states have call predecessors, (1084), 51 states have call successors, (1084) [2023-03-31 22:01:31,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11316 states to 11316 states and 15532 transitions. [2023-03-31 22:01:31,417 INFO L78 Accepts]: Start accepts. Automaton has 11316 states and 15532 transitions. Word has length 74 [2023-03-31 22:01:31,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:01:31,418 INFO L495 AbstractCegarLoop]: Abstraction has 11316 states and 15532 transitions. [2023-03-31 22:01:31,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 4 states have internal predecessors, (62), 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 22:01:31,419 INFO L276 IsEmpty]: Start isEmpty. Operand 11316 states and 15532 transitions. [2023-03-31 22:01:31,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-03-31 22:01:31,421 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:01:31,421 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-03-31 22:01:31,430 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 22:01:31,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:31,628 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:01:31,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:01:31,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1064377749, now seen corresponding path program 1 times [2023-03-31 22:01:31,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:01:31,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025201589] [2023-03-31 22:01:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:01:31,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:31,845 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 22:01:31,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:01:31,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025201589] [2023-03-31 22:01:31,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025201589] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:01:31,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989873643] [2023-03-31 22:01:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:01:31,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:01:31,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:01:31,849 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 22:01:31,851 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 22:01:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:01:31,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:01:31,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:01:32,076 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 59 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:01:32,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:01:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-03-31 22:01:32,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989873643] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:01:32,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433016874] [2023-03-31 22:01:32,300 INFO L159 IcfgInterpreter]: Started Sifa with 50 locations of interest [2023-03-31 22:01:32,300 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:01:32,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:01:32,307 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:01:32,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:01:32,442 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 52 for LOIs [2023-03-31 22:01:32,795 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56 [2023-03-31 22:01:33,687 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 46 for LOIs [2023-03-31 22:01:34,808 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 56 [2023-03-31 22:01:42,388 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 115507 conjuctions. This might take some time... [2023-03-31 22:01:57,683 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 638 conjuctions.