/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 OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:15:58,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:15:58,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:15:58,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:15:58,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:15:58,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:15:58,132 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:15:58,134 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:15:58,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:15:58,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:15:58,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:15:58,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:15:58,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:15:58,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:15:58,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:15:58,149 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:15:58,149 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:15:58,150 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:15:58,152 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:15:58,156 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:15:58,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:15:58,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:15:58,159 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:15:58,161 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:15:58,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:15:58,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:15:58,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:15:58,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:15:58,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:15:58,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:15:58,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:15:58,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:15:58,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:15:58,174 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:15:58,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:15:58,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:15:58,175 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:15:58,175 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:15:58,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:15:58,176 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:15:58,176 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:15:58,178 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 [2023-04-01 04:15:58,212 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:15:58,212 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:15:58,212 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:15:58,213 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:15:58,213 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:15:58,213 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:15:58,214 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:15:58,214 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:15:58,214 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:15:58,214 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:15:58,215 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:15:58,215 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:15:58,215 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:15:58,215 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:15:58,215 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:15:58,215 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:15:58,215 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:15:58,215 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:15:58,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:15:58,216 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:15:58,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:15:58,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:15:58,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:15:58,217 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:15:58,217 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:15:58,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:15:58,217 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:15:58,217 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:15:58,217 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:15:58,217 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:15:58,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:15:58,218 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:15:58,218 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:15:58,218 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:15:58,218 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:15:58,218 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:15:58,218 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:15:58,219 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:15:58,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:15:58,219 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:15:58,219 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:15:58,219 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:15:58,429 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:15:58,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:15:58,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:15:58,454 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:15:58,454 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:15:58,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label53.c [2023-04-01 04:15:59,592 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:15:59,952 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:15:59,953 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label53.c [2023-04-01 04:15:59,970 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/975d45afa/22b88632474f408688b2fbc622d29e67/FLAG758f65cf2 [2023-04-01 04:15:59,981 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/975d45afa/22b88632474f408688b2fbc622d29e67 [2023-04-01 04:15:59,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:15:59,985 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:15:59,989 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:15:59,989 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:15:59,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:15:59,993 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:15:59" (1/1) ... [2023-04-01 04:15:59,994 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a2be5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:15:59, skipping insertion in model container [2023-04-01 04:15:59,994 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:15:59" (1/1) ... [2023-04-01 04:16:00,000 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:16:00,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:16:00,297 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/Problem15_label53.c[5826,5839] [2023-04-01 04:16:00,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:16:00,693 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:16:00,722 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/Problem15_label53.c[5826,5839] [2023-04-01 04:16:00,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:16:00,952 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:16:00,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00 WrapperNode [2023-04-01 04:16:00,953 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:16:00,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:16:00,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:16:00,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:16:00,965 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (1/1) ... [2023-04-01 04:16:00,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (1/1) ... [2023-04-01 04:16:01,007 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (1/1) ... [2023-04-01 04:16:01,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (1/1) ... [2023-04-01 04:16:01,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (1/1) ... [2023-04-01 04:16:01,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (1/1) ... [2023-04-01 04:16:01,121 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (1/1) ... [2023-04-01 04:16:01,131 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (1/1) ... [2023-04-01 04:16:01,155 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:16:01,156 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:16:01,156 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:16:01,157 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:16:01,158 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (1/1) ... [2023-04-01 04:16:01,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:16:01,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:16:01,190 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) [2023-04-01 04:16:01,206 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 [2023-04-01 04:16:01,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:16:01,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:16:01,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:16:01,237 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:16:01,237 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 04:16:01,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:16:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:16:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 04:16:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:16:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:16:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:16:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:16:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:16:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:16:01,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:16:01,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:16:01,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:16:01,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:16:01,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:16:01,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:16:01,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:16:01,303 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:16:01,305 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:16:03,678 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:16:04,402 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:16:04,403 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:16:04,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:16:04 BoogieIcfgContainer [2023-04-01 04:16:04,408 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:16:04,410 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:16:04,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:16:04,413 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:16:04,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:15:59" (1/3) ... [2023-04-01 04:16:04,414 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401ab32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:16:04, skipping insertion in model container [2023-04-01 04:16:04,414 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:16:00" (2/3) ... [2023-04-01 04:16:04,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@401ab32a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:16:04, skipping insertion in model container [2023-04-01 04:16:04,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:16:04" (3/3) ... [2023-04-01 04:16:04,416 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label53.c [2023-04-01 04:16:04,434 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:16:04,434 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:16:04,497 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:16:04,504 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;@777fc55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:16:04,505 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:16:04,512 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:16:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:16:04,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:04,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:16:04,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:04,526 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:04,526 INFO L85 PathProgramCache]: Analyzing trace with hash 468033700, now seen corresponding path program 1 times [2023-04-01 04:16:04,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:04,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257958409] [2023-04-01 04:16:04,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:04,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:04,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:16:04,905 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:04,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257958409] [2023-04-01 04:16:04,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257958409] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:16:04,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:16:04,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:16:04,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299959961] [2023-04-01 04:16:04,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:16:04,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:16:04,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:16:04,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:16:04,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:16:04,942 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) 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) [2023-04-01 04:16:06,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:16:06,629 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 04:16:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:16:06,634 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 [2023-04-01 04:16:06,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:16:06,650 INFO L225 Difference]: With dead ends: 718 [2023-04-01 04:16:06,650 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 04:16:06,654 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 [2023-04-01 04:16:06,657 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 235 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-04-01 04:16:06,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 110 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-04-01 04:16:06,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 04:16:06,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 469. [2023-04-01 04:16:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 459 states have (on average 1.7712418300653594) internal successors, (813), 459 states have internal predecessors, (813), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 04:16:06,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 824 transitions. [2023-04-01 04:16:06,746 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 824 transitions. Word has length 11 [2023-04-01 04:16:06,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:16:06,746 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 824 transitions. [2023-04-01 04:16:06,746 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) [2023-04-01 04:16:06,747 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 824 transitions. [2023-04-01 04:16:06,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:16:06,748 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:06,748 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:16:06,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:16:06,749 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:06,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:06,749 INFO L85 PathProgramCache]: Analyzing trace with hash -1455667400, now seen corresponding path program 1 times [2023-04-01 04:16:06,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:06,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390350971] [2023-04-01 04:16:06,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:06,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:16:06,990 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:06,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390350971] [2023-04-01 04:16:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390350971] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:16:06,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:16:06,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:16:06,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789488352] [2023-04-01 04:16:06,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:16:06,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:16:06,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:16:06,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:16:06,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:16:06,993 INFO L87 Difference]: Start difference. First operand 469 states and 824 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-04-01 04:16:09,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:16:09,143 INFO L93 Difference]: Finished difference Result 1417 states and 2504 transitions. [2023-04-01 04:16:09,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:16:09,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 23 [2023-04-01 04:16:09,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:16:09,150 INFO L225 Difference]: With dead ends: 1417 [2023-04-01 04:16:09,150 INFO L226 Difference]: Without dead ends: 953 [2023-04-01 04:16:09,151 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 [2023-04-01 04:16:09,153 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 831 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:16:09,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 49 Invalid, 1722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-04-01 04:16:09,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2023-04-01 04:16:09,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 936. [2023-04-01 04:16:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 917 states have (on average 1.4841875681570338) internal successors, (1361), 920 states have internal predecessors, (1361), 8 states have call successors, (8), 8 states have call predecessors, (8), 10 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 04:16:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1388 transitions. [2023-04-01 04:16:09,202 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1388 transitions. Word has length 23 [2023-04-01 04:16:09,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:16:09,203 INFO L495 AbstractCegarLoop]: Abstraction has 936 states and 1388 transitions. [2023-04-01 04:16:09,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-04-01 04:16:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1388 transitions. [2023-04-01 04:16:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 04:16:09,204 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:09,204 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] [2023-04-01 04:16:09,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:16:09,205 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:09,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:09,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1122495209, now seen corresponding path program 1 times [2023-04-01 04:16:09,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:09,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024981986] [2023-04-01 04:16:09,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:09,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:16:09,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:09,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024981986] [2023-04-01 04:16:09,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024981986] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:16:09,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109586630] [2023-04-01 04:16:09,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:09,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:16:09,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:16:09,661 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) [2023-04-01 04:16:09,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:16:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:09,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 11 conjunts are in the unsatisfiable core [2023-04-01 04:16:09,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:16:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:16:10,020 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:16:10,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109586630] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:16:10,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:16:10,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-04-01 04:16:10,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947150907] [2023-04-01 04:16:10,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:16:10,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:16:10,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:16:10,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:16:10,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-04-01 04:16:10,023 INFO L87 Difference]: Start difference. First operand 936 states and 1388 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-04-01 04:16:13,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:16:13,040 INFO L93 Difference]: Finished difference Result 2858 states and 4276 transitions. [2023-04-01 04:16:13,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 04:16:13,041 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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 32 [2023-04-01 04:16:13,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:16:13,049 INFO L225 Difference]: With dead ends: 2858 [2023-04-01 04:16:13,049 INFO L226 Difference]: Without dead ends: 1927 [2023-04-01 04:16:13,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-04-01 04:16:13,052 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 661 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 1480 mSolverCounterSat, 379 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 379 IncrementalHoareTripleChecker+Valid, 1480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-04-01 04:16:13,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [661 Valid, 54 Invalid, 1859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [379 Valid, 1480 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-04-01 04:16:13,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1927 states. [2023-04-01 04:16:13,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1927 to 1440. [2023-04-01 04:16:13,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1394 states have (on average 1.3400286944045912) internal successors, (1868), 1416 states have internal predecessors, (1868), 12 states have call successors, (12), 12 states have call predecessors, (12), 33 states have return successors, (61), 11 states have call predecessors, (61), 11 states have call successors, (61) [2023-04-01 04:16:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 1941 transitions. [2023-04-01 04:16:13,116 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 1941 transitions. Word has length 32 [2023-04-01 04:16:13,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:16:13,117 INFO L495 AbstractCegarLoop]: Abstraction has 1440 states and 1941 transitions. [2023-04-01 04:16:13,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 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) [2023-04-01 04:16:13,117 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 1941 transitions. [2023-04-01 04:16:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-04-01 04:16:13,126 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:13,127 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 04:16:13,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 04:16:13,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:16:13,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:13,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:13,335 INFO L85 PathProgramCache]: Analyzing trace with hash 447038873, now seen corresponding path program 1 times [2023-04-01 04:16:13,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:13,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713677462] [2023-04-01 04:16:13,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:13,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:16:14,098 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:14,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713677462] [2023-04-01 04:16:14,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713677462] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:16:14,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311506932] [2023-04-01 04:16:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:14,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:16:14,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:16:14,100 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) [2023-04-01 04:16:14,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:16:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:14,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:16:14,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:16:14,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:16:14,322 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 04:16:14,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311506932] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:16:14,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 04:16:14,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-04-01 04:16:14,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553861271] [2023-04-01 04:16:14,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:16:14,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:16:14,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:16:14,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:16:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:16:14,325 INFO L87 Difference]: Start difference. First operand 1440 states and 1941 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:16:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:16:16,093 INFO L93 Difference]: Finished difference Result 4270 states and 5860 transitions. [2023-04-01 04:16:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:16:16,093 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 238 [2023-04-01 04:16:16,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:16:16,106 INFO L225 Difference]: With dead ends: 4270 [2023-04-01 04:16:16,106 INFO L226 Difference]: Without dead ends: 2835 [2023-04-01 04:16:16,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:16:16,113 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 230 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-04-01 04:16:16,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 202 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-04-01 04:16:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2835 states. [2023-04-01 04:16:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2835 to 2129. [2023-04-01 04:16:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2129 states, 2069 states have (on average 1.3185113581440309) internal successors, (2728), 2099 states have internal predecessors, (2728), 15 states have call successors, (15), 15 states have call predecessors, (15), 44 states have return successors, (116), 14 states have call predecessors, (116), 14 states have call successors, (116) [2023-04-01 04:16:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2129 states to 2129 states and 2859 transitions. [2023-04-01 04:16:16,176 INFO L78 Accepts]: Start accepts. Automaton has 2129 states and 2859 transitions. Word has length 238 [2023-04-01 04:16:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:16:16,178 INFO L495 AbstractCegarLoop]: Abstraction has 2129 states and 2859 transitions. [2023-04-01 04:16:16,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 3 states have internal predecessors, (232), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 04:16:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2129 states and 2859 transitions. [2023-04-01 04:16:16,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-04-01 04:16:16,184 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:16,184 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 04:16:16,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:16:16,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 04:16:16,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:16,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1170666334, now seen corresponding path program 1 times [2023-04-01 04:16:16,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:16,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138087122] [2023-04-01 04:16:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:16,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:16,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:16,825 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-01 04:16:16,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:16,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138087122] [2023-04-01 04:16:16,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138087122] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:16:16,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:16:16,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:16:16,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174451702] [2023-04-01 04:16:16,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:16:16,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:16:16,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:16:16,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:16:16,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:16:16,830 INFO L87 Difference]: Start difference. First operand 2129 states and 2859 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:16:18,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:16:18,331 INFO L93 Difference]: Finished difference Result 5188 states and 7228 transitions. [2023-04-01 04:16:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:16:18,332 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 278 [2023-04-01 04:16:18,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:16:18,348 INFO L225 Difference]: With dead ends: 5188 [2023-04-01 04:16:18,348 INFO L226 Difference]: Without dead ends: 3064 [2023-04-01 04:16:18,353 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:16:18,356 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-04-01 04:16:18,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 421 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-04-01 04:16:18,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3064 states. [2023-04-01 04:16:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3064 to 2984. [2023-04-01 04:16:18,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2984 states, 2908 states have (on average 1.2620357634112793) internal successors, (3670), 2946 states have internal predecessors, (3670), 19 states have call successors, (19), 19 states have call predecessors, (19), 56 states have return successors, (196), 18 states have call predecessors, (196), 18 states have call successors, (196) [2023-04-01 04:16:18,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2984 states to 2984 states and 3885 transitions. [2023-04-01 04:16:18,433 INFO L78 Accepts]: Start accepts. Automaton has 2984 states and 3885 transitions. Word has length 278 [2023-04-01 04:16:18,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:16:18,434 INFO L495 AbstractCegarLoop]: Abstraction has 2984 states and 3885 transitions. [2023-04-01 04:16:18,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 3 states have internal predecessors, (223), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 04:16:18,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2984 states and 3885 transitions. [2023-04-01 04:16:18,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2023-04-01 04:16:18,439 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:16:18,440 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2023-04-01 04:16:18,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-04-01 04:16:18,440 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:16:18,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:16:18,440 INFO L85 PathProgramCache]: Analyzing trace with hash 890513851, now seen corresponding path program 1 times [2023-04-01 04:16:18,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:16:18,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747905283] [2023-04-01 04:16:18,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:18,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:16:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:16:18,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:16:18,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747905283] [2023-04-01 04:16:18,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747905283] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:16:18,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754487756] [2023-04-01 04:16:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:16:18,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:16:18,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:16:18,945 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:16:18,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:16:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:16:19,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:16:19,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:16:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:16:19,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:16:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-04-01 04:16:19,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754487756] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:16:19,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [222365230] [2023-04-01 04:16:19,385 INFO L159 IcfgInterpreter]: Started Sifa with 222 locations of interest [2023-04-01 04:16:19,385 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:16:19,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:16:19,394 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:16:19,395 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:16:19,544 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-04-01 04:16:20,376 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 41 [2023-04-01 04:16:27,155 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 72089 conjuctions. This might take some time... [2023-04-01 04:16:35,542 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 969 conjuctions. [2023-04-01 04:16:40,362 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 20