/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/Problem03_label36.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 09:25:32,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 09:25:32,134 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 09:25:32,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 09:25:32,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 09:25:32,153 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 09:25:32,154 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 09:25:32,155 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 09:25:32,156 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 09:25:32,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 09:25:32,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 09:25:32,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 09:25:32,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 09:25:32,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 09:25:32,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 09:25:32,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 09:25:32,160 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 09:25:32,161 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 09:25:32,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 09:25:32,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 09:25:32,164 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 09:25:32,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 09:25:32,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 09:25:32,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 09:25:32,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 09:25:32,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 09:25:32,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 09:25:32,168 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 09:25:32,169 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 09:25:32,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 09:25:32,169 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 09:25:32,170 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 09:25:32,170 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 09:25:32,171 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 09:25:32,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 09:25:32,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 09:25:32,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 09:25:32,172 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 09:25:32,172 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 09:25:32,173 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 09:25:32,173 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 09:25:32,174 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 09:25:32,188 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 09:25:32,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 09:25:32,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 09:25:32,188 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 09:25:32,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 09:25:32,189 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 09:25:32,189 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 09:25:32,189 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 09:25:32,189 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 09:25:32,190 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 09:25:32,190 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 09:25:32,190 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 09:25:32,190 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 09:25:32,190 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 09:25:32,190 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 09:25:32,190 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 09:25:32,191 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 09:25:32,191 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 09:25:32,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 09:25:32,191 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 09:25:32,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 09:25:32,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 09:25:32,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 09:25:32,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 09:25:32,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 09:25:32,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 09:25:32,192 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 09:25:32,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 09:25:32,192 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 09:25:32,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 09:25:32,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 09:25:32,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 09:25:32,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:25:32,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 09:25:32,193 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 09:25:32,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 09:25:32,193 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 09:25:32,194 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 09:25:32,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 09:25:32,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 09:25:32,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 09:25:32,194 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 09:25:32,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 09:25:32,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 09:25:32,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 09:25:32,375 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 09:25:32,376 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 09:25:32,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label36.c [2023-04-01 09:25:33,363 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 09:25:33,602 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 09:25:33,603 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label36.c [2023-04-01 09:25:33,614 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c219ebb/698c3e096cf44c2692430ddd4c95a145/FLAGe06b2574a [2023-04-01 09:25:33,624 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52c219ebb/698c3e096cf44c2692430ddd4c95a145 [2023-04-01 09:25:33,626 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 09:25:33,626 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 09:25:33,628 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 09:25:33,628 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 09:25:33,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 09:25:33,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:25:33" (1/1) ... [2023-04-01 09:25:33,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8bd3b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:33, skipping insertion in model container [2023-04-01 09:25:33,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 09:25:33" (1/1) ... [2023-04-01 09:25:33,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 09:25:33,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 09:25:34,079 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/Problem03_label36.c[58393,58406] [2023-04-01 09:25:34,103 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:25:34,112 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 09:25:34,247 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/Problem03_label36.c[58393,58406] [2023-04-01 09:25:34,255 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 09:25:34,267 INFO L208 MainTranslator]: Completed translation [2023-04-01 09:25:34,267 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34 WrapperNode [2023-04-01 09:25:34,267 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 09:25:34,268 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 09:25:34,268 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 09:25:34,268 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 09:25:34,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,276 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,303 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,303 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,372 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,384 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,390 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 09:25:34,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 09:25:34,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 09:25:34,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 09:25:34,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (1/1) ... [2023-04-01 09:25:34,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 09:25:34,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:25:34,424 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 09:25:34,448 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 09:25:34,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 09:25:34,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 09:25:34,455 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 09:25:34,455 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 09:25:34,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 09:25:34,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 09:25:34,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 09:25:34,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 09:25:34,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 09:25:34,553 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 09:25:34,555 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 09:25:35,632 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 09:25:35,841 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 09:25:35,841 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 09:25:35,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:25:35 BoogieIcfgContainer [2023-04-01 09:25:35,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 09:25:35,848 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 09:25:35,848 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 09:25:35,850 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 09:25:35,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 09:25:33" (1/3) ... [2023-04-01 09:25:35,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf77197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:25:35, skipping insertion in model container [2023-04-01 09:25:35,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 09:25:34" (2/3) ... [2023-04-01 09:25:35,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cf77197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 09:25:35, skipping insertion in model container [2023-04-01 09:25:35,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 09:25:35" (3/3) ... [2023-04-01 09:25:35,853 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem03_label36.c [2023-04-01 09:25:35,864 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 09:25:35,864 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 09:25:35,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 09:25:35,912 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;@7380a7be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 09:25:35,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 09:25:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 09:25:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-04-01 09:25:35,930 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:35,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 09:25:35,932 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:35,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:35,937 INFO L85 PathProgramCache]: Analyzing trace with hash 597538550, now seen corresponding path program 1 times [2023-04-01 09:25:35,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:35,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553022993] [2023-04-01 09:25:35,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:35,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:36,768 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 09:25:36,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:36,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553022993] [2023-04-01 09:25:36,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553022993] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:36,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:36,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 09:25:36,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604109128] [2023-04-01 09:25:36,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:36,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 09:25:36,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 09:25:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 09:25:36,805 INFO L87 Difference]: Start difference. First operand has 158 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 151 states have internal predecessors, (292), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 09:25:37,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:37,463 INFO L93 Difference]: Finished difference Result 462 states and 886 transitions. [2023-04-01 09:25:37,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 09:25:37,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 149 [2023-04-01 09:25:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:37,496 INFO L225 Difference]: With dead ends: 462 [2023-04-01 09:25:37,497 INFO L226 Difference]: Without dead ends: 301 [2023-04-01 09:25:37,499 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 09:25:37,501 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 43 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:37,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 68 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:25:37,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2023-04-01 09:25:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2023-04-01 09:25:37,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 293 states have (on average 1.7918088737201365) internal successors, (525), 293 states have internal predecessors, (525), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-04-01 09:25:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 534 transitions. [2023-04-01 09:25:37,542 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 534 transitions. Word has length 149 [2023-04-01 09:25:37,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:37,543 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 534 transitions. [2023-04-01 09:25:37,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 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 09:25:37,543 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 534 transitions. [2023-04-01 09:25:37,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-04-01 09:25:37,546 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:37,546 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:25:37,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 09:25:37,547 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:37,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:37,547 INFO L85 PathProgramCache]: Analyzing trace with hash 15713200, now seen corresponding path program 1 times [2023-04-01 09:25:37,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:37,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672743605] [2023-04-01 09:25:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:37,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:37,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:37,846 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:37,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672743605] [2023-04-01 09:25:37,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672743605] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:37,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:37,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:25:37,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672902277] [2023-04-01 09:25:37,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:37,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:25:37,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:37,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:25:37,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:25:37,849 INFO L87 Difference]: Start difference. First operand 301 states and 534 transitions. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 09:25:38,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:38,199 INFO L93 Difference]: Finished difference Result 913 states and 1633 transitions. [2023-04-01 09:25:38,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 09:25:38,200 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 158 [2023-04-01 09:25:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:38,203 INFO L225 Difference]: With dead ends: 913 [2023-04-01 09:25:38,204 INFO L226 Difference]: Without dead ends: 617 [2023-04-01 09:25:38,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-04-01 09:25:38,206 INFO L413 NwaCegarLoop]: 181 mSDtfsCounter, 774 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:38,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 528 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 09:25:38,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2023-04-01 09:25:38,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 605. [2023-04-01 09:25:38,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 588 states have (on average 1.7789115646258504) internal successors, (1046), 593 states have internal predecessors, (1046), 6 states have call successors, (6), 6 states have call predecessors, (6), 10 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2023-04-01 09:25:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1074 transitions. [2023-04-01 09:25:38,243 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1074 transitions. Word has length 158 [2023-04-01 09:25:38,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:38,243 INFO L495 AbstractCegarLoop]: Abstraction has 605 states and 1074 transitions. [2023-04-01 09:25:38,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 4 states have internal predecessors, (152), 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 09:25:38,244 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1074 transitions. [2023-04-01 09:25:38,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-04-01 09:25:38,247 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:38,247 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:25:38,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 09:25:38,247 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:38,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:38,248 INFO L85 PathProgramCache]: Analyzing trace with hash -848544043, now seen corresponding path program 1 times [2023-04-01 09:25:38,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:38,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445388980] [2023-04-01 09:25:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:38,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:38,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:38,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:38,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445388980] [2023-04-01 09:25:38,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445388980] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:38,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:38,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:25:38,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642330355] [2023-04-01 09:25:38,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:38,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:25:38,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:38,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:25:38,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:25:38,497 INFO L87 Difference]: Start difference. First operand 605 states and 1074 transitions. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 09:25:39,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:39,228 INFO L93 Difference]: Finished difference Result 1861 states and 3379 transitions. [2023-04-01 09:25:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:25:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 161 [2023-04-01 09:25:39,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:39,245 INFO L225 Difference]: With dead ends: 1861 [2023-04-01 09:25:39,245 INFO L226 Difference]: Without dead ends: 1261 [2023-04-01 09:25:39,247 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 09:25:39,247 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 493 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:39,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [493 Valid, 44 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 09:25:39,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2023-04-01 09:25:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1233. [2023-04-01 09:25:39,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1188 states have (on average 1.7188552188552189) internal successors, (2042), 1213 states have internal predecessors, (2042), 10 states have call successors, (10), 10 states have call predecessors, (10), 34 states have return successors, (102), 9 states have call predecessors, (102), 9 states have call successors, (102) [2023-04-01 09:25:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 2154 transitions. [2023-04-01 09:25:39,287 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 2154 transitions. Word has length 161 [2023-04-01 09:25:39,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:39,288 INFO L495 AbstractCegarLoop]: Abstraction has 1233 states and 2154 transitions. [2023-04-01 09:25:39,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 4 states have internal predecessors, (155), 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 09:25:39,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 2154 transitions. [2023-04-01 09:25:39,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-04-01 09:25:39,291 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:39,291 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-04-01 09:25:39,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 09:25:39,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:39,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:39,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1968824508, now seen corresponding path program 1 times [2023-04-01 09:25:39,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:39,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443839804] [2023-04-01 09:25:39,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:39,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:39,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 09:25:39,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:39,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443839804] [2023-04-01 09:25:39,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443839804] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 09:25:39,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 09:25:39,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 09:25:39,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014333693] [2023-04-01 09:25:39,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 09:25:39,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 09:25:39,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 09:25:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 09:25:39,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 09:25:39,728 INFO L87 Difference]: Start difference. First operand 1233 states and 2154 transitions. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 09:25:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 09:25:40,403 INFO L93 Difference]: Finished difference Result 3811 states and 6912 transitions. [2023-04-01 09:25:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 09:25:40,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 168 [2023-04-01 09:25:40,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 09:25:40,413 INFO L225 Difference]: With dead ends: 3811 [2023-04-01 09:25:40,414 INFO L226 Difference]: Without dead ends: 2583 [2023-04-01 09:25:40,416 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 09:25:40,417 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 485 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 09:25:40,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 44 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 09:25:40,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2583 states. [2023-04-01 09:25:40,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2583 to 2551. [2023-04-01 09:25:40,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2551 states, 2419 states have (on average 1.6382802811078958) internal successors, (3963), 2515 states have internal predecessors, (3963), 18 states have call successors, (18), 18 states have call predecessors, (18), 113 states have return successors, (434), 17 states have call predecessors, (434), 17 states have call successors, (434) [2023-04-01 09:25:40,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2551 states to 2551 states and 4415 transitions. [2023-04-01 09:25:40,481 INFO L78 Accepts]: Start accepts. Automaton has 2551 states and 4415 transitions. Word has length 168 [2023-04-01 09:25:40,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 09:25:40,481 INFO L495 AbstractCegarLoop]: Abstraction has 2551 states and 4415 transitions. [2023-04-01 09:25:40,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 4 states have internal predecessors, (162), 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 09:25:40,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2551 states and 4415 transitions. [2023-04-01 09:25:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-04-01 09:25:40,487 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 09:25:40,488 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2023-04-01 09:25:40,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-04-01 09:25:40,488 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 09:25:40,488 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 09:25:40,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1306512095, now seen corresponding path program 1 times [2023-04-01 09:25:40,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 09:25:40,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344319119] [2023-04-01 09:25:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:40,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 09:25:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:41,125 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 09:25:41,125 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 09:25:41,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344319119] [2023-04-01 09:25:41,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344319119] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 09:25:41,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839363940] [2023-04-01 09:25:41,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 09:25:41,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 09:25:41,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 09:25:41,128 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 09:25:41,129 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 09:25:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 09:25:41,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 09:25:41,331 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 09:25:41,425 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 09:25:41,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 09:25:41,570 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 09:25:41,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839363940] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 09:25:41,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1256888138] [2023-04-01 09:25:41,613 INFO L159 IcfgInterpreter]: Started Sifa with 153 locations of interest [2023-04-01 09:25:41,613 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 09:25:41,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 09:25:41,623 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 09:25:41,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 09:25:42,530 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 194 for LOIs