/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 EqDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:16:06,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:16:06,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:16:06,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:16:06,203 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:16:06,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:16:06,205 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:16:06,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:16:06,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:16:06,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:16:06,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:16:06,210 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:16:06,210 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:16:06,211 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:16:06,212 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:16:06,213 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:16:06,213 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:16:06,214 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:16:06,215 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:16:06,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:16:06,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:16:06,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:16:06,220 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:16:06,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:16:06,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:16:06,224 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:16:06,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:16:06,225 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:16:06,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:16:06,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:16:06,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:16:06,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:16:06,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:16:06,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:16:06,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:16:06,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:16:06,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:16:06,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:16:06,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:16:06,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:16:06,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:16:06,231 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 10:16:06,250 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:16:06,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:16:06,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:16:06,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:16:06,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:16:06,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:16:06,251 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:16:06,251 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:16:06,251 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:16:06,252 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:16:06,252 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:16:06,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:16:06,252 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:16:06,252 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:16:06,252 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:16:06,252 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:16:06,253 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:16:06,253 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:16:06,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:16:06,253 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:16:06,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:16:06,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:16:06,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:16:06,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:16:06,254 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:16:06,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:16:06,254 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:16:06,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:16:06,254 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:16:06,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:16:06,255 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:16:06,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:16:06,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:16:06,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:16:06,255 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:16:06,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:16:06,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:16:06,256 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:16:06,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:16:06,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:16:06,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:16:06,256 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:16:06,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:16:06,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:16:06,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:16:06,527 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:16:06,528 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:16:06,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label15.c [2023-04-01 10:16:07,760 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:16:08,110 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:16:08,110 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label15.c [2023-04-01 10:16:08,135 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/048388b4e/bda47af6e94040edb853b875aa22bee8/FLAG9d7d7c487 [2023-04-01 10:16:08,149 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/048388b4e/bda47af6e94040edb853b875aa22bee8 [2023-04-01 10:16:08,151 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:16:08,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:16:08,157 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:16:08,157 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:16:08,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:16:08,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:16:08" (1/1) ... [2023-04-01 10:16:08,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@728ae800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:08, skipping insertion in model container [2023-04-01 10:16:08,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:16:08" (1/1) ... [2023-04-01 10:16:08,168 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:16:08,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:16:08,368 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_label15.c[2445,2458] [2023-04-01 10:16:08,796 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:16:08,809 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:16:08,823 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_label15.c[2445,2458] [2023-04-01 10:16:09,008 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:16:09,023 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:16:09,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09 WrapperNode [2023-04-01 10:16:09,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:16:09,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:16:09,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:16:09,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:16:09,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (1/1) ... [2023-04-01 10:16:09,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (1/1) ... [2023-04-01 10:16:09,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (1/1) ... [2023-04-01 10:16:09,073 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (1/1) ... [2023-04-01 10:16:09,153 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (1/1) ... [2023-04-01 10:16:09,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (1/1) ... [2023-04-01 10:16:09,198 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (1/1) ... [2023-04-01 10:16:09,208 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (1/1) ... [2023-04-01 10:16:09,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:16:09,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:16:09,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:16:09,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:16:09,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (1/1) ... [2023-04-01 10:16:09,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:16:09,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:16:09,263 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 10:16:09,273 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 10:16:09,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:16:09,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:16:09,316 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:16:09,316 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 10:16:09,316 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-04-01 10:16:09,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:16:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 10:16:09,316 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:16:09,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:16:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:16:09,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:16:09,416 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:16:09,418 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:16:11,834 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:16:12,402 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:16:12,402 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 10:16:12,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:16:12 BoogieIcfgContainer [2023-04-01 10:16:12,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:16:12,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:16:12,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:16:12,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:16:12,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:16:08" (1/3) ... [2023-04-01 10:16:12,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612132af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:16:12, skipping insertion in model container [2023-04-01 10:16:12,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:16:09" (2/3) ... [2023-04-01 10:16:12,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@612132af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:16:12, skipping insertion in model container [2023-04-01 10:16:12,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:16:12" (3/3) ... [2023-04-01 10:16:12,412 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label15.c [2023-04-01 10:16:12,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:16:12,430 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:16:12,477 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:16:12,483 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;@115b7000, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:16:12,483 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:16:12,488 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 10:16:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 10:16:12,494 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:12,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:12,495 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:12,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:12,500 INFO L85 PathProgramCache]: Analyzing trace with hash 468026532, now seen corresponding path program 1 times [2023-04-01 10:16:12,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:12,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752440560] [2023-04-01 10:16:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:12,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:12,851 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 10:16:12,852 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:12,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752440560] [2023-04-01 10:16:12,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752440560] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:12,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:12,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:16:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721057385] [2023-04-01 10:16:12,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:12,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:16:12,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:12,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:16:12,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:12,896 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 10:16:14,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:14,848 INFO L93 Difference]: Finished difference Result 718 states and 1389 transitions. [2023-04-01 10:16:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:16:14,850 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 10:16:14,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:14,862 INFO L225 Difference]: With dead ends: 718 [2023-04-01 10:16:14,862 INFO L226 Difference]: Without dead ends: 471 [2023-04-01 10:16:14,868 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 10:16:14,871 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 240 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:14,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 48 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 10:16:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-04-01 10:16:14,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 442. [2023-04-01 10:16:14,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 432 states have (on average 1.9305555555555556) internal successors, (834), 432 states have internal predecessors, (834), 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 10:16:14,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 845 transitions. [2023-04-01 10:16:14,935 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 845 transitions. Word has length 11 [2023-04-01 10:16:14,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:14,935 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 845 transitions. [2023-04-01 10:16:14,935 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 10:16:14,936 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 845 transitions. [2023-04-01 10:16:14,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:16:14,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:14,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:16:14,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:16:14,938 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:14,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:14,938 INFO L85 PathProgramCache]: Analyzing trace with hash 89379390, now seen corresponding path program 1 times [2023-04-01 10:16:14,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:14,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799438617] [2023-04-01 10:16:14,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:14,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:14,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:15,074 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 10:16:15,075 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:15,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799438617] [2023-04-01 10:16:15,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799438617] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:15,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:15,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 10:16:15,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471468074] [2023-04-01 10:16:15,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:15,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 10:16:15,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:15,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 10:16:15,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 10:16:15,078 INFO L87 Difference]: Start difference. First operand 442 states and 845 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 10:16:16,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:16,891 INFO L93 Difference]: Finished difference Result 1314 states and 2536 transitions. [2023-04-01 10:16:16,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 10:16:16,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 21 [2023-04-01 10:16:16,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:16,897 INFO L225 Difference]: With dead ends: 1314 [2023-04-01 10:16:16,897 INFO L226 Difference]: Without dead ends: 877 [2023-04-01 10:16:16,899 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 10:16:16,901 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 243 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:16,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 169 Invalid, 927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 10:16:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2023-04-01 10:16:16,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 842. [2023-04-01 10:16:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 826 states have (on average 1.6004842615012107) internal successors, (1322), 826 states have internal predecessors, (1322), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2023-04-01 10:16:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1349 transitions. [2023-04-01 10:16:16,950 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1349 transitions. Word has length 21 [2023-04-01 10:16:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:16,951 INFO L495 AbstractCegarLoop]: Abstraction has 842 states and 1349 transitions. [2023-04-01 10:16:16,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 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 10:16:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1349 transitions. [2023-04-01 10:16:16,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 10:16:16,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:16,953 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] [2023-04-01 10:16:16,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 10:16:16,953 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:16,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:16,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1648214922, now seen corresponding path program 1 times [2023-04-01 10:16:16,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:16,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137420498] [2023-04-01 10:16:16,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:16,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:17,140 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 10:16:17,141 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:17,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137420498] [2023-04-01 10:16:17,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137420498] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:16:17,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:16:17,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:16:17,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901872261] [2023-04-01 10:16:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:16:17,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:16:17,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:16:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:16:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:16:17,143 INFO L87 Difference]: Start difference. First operand 842 states and 1349 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 10:16:19,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:16:19,537 INFO L93 Difference]: Finished difference Result 2560 states and 4171 transitions. [2023-04-01 10:16:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 10:16:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 38 [2023-04-01 10:16:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:16:19,576 INFO L225 Difference]: With dead ends: 2560 [2023-04-01 10:16:19,576 INFO L226 Difference]: Without dead ends: 1723 [2023-04-01 10:16:19,579 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 10:16:19,580 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 814 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:16:19,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [814 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-04-01 10:16:19,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1723 states. [2023-04-01 10:16:19,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1723 to 1380. [2023-04-01 10:16:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1344 states have (on average 1.4308035714285714) internal successors, (1923), 1354 states have internal predecessors, (1923), 13 states have call successors, (13), 13 states have call predecessors, (13), 22 states have return successors, (65), 12 states have call predecessors, (65), 12 states have call successors, (65) [2023-04-01 10:16:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2001 transitions. [2023-04-01 10:16:19,650 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2001 transitions. Word has length 38 [2023-04-01 10:16:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:16:19,651 INFO L495 AbstractCegarLoop]: Abstraction has 1380 states and 2001 transitions. [2023-04-01 10:16:19,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 4 states have internal predecessors, (32), 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 10:16:19,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2001 transitions. [2023-04-01 10:16:19,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-04-01 10:16:19,663 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:16:19,665 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 10:16:19,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 10:16:19,665 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:16:19,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:16:19,670 INFO L85 PathProgramCache]: Analyzing trace with hash -119953544, now seen corresponding path program 1 times [2023-04-01 10:16:19,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:16:19,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527311179] [2023-04-01 10:16:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:16:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:20,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:16:20,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527311179] [2023-04-01 10:16:20,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527311179] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:16:20,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418302713] [2023-04-01 10:16:20,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:16:20,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:16:20,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:16:20,133 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 10:16:20,154 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 10:16:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:16:20,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:16:20,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:16:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:20,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:16:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 39 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:16:20,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418302713] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:16:20,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [162058053] [2023-04-01 10:16:20,709 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-04-01 10:16:20,709 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:16:20,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:16:20,717 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:16:20,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:16:20,959 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 83 for LOIs [2023-04-01 10:16:21,422 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 13 [2023-04-01 10:16:27,937 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 48