/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/eca-rers2012/Problem14_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:11:59,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:11:59,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:11:59,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:11:59,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:11:59,170 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:11:59,173 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:11:59,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:11:59,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:11:59,184 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:11:59,186 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:11:59,188 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:11:59,188 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:11:59,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:11:59,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:11:59,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:11:59,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:11:59,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:11:59,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:11:59,200 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:11:59,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:11:59,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:11:59,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:11:59,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:11:59,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:11:59,213 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:11:59,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:11:59,214 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:11:59,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:11:59,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:11:59,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:11:59,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:11:59,217 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:11:59,218 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:11:59,219 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:11:59,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:11:59,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:11:59,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:11:59,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:11:59,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:11:59,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:11:59,223 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:11:59,252 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:11:59,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:11:59,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:11:59,253 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:11:59,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:11:59,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:11:59,254 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:11:59,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:11:59,254 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:11:59,254 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:11:59,255 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:11:59,255 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:11:59,255 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:11:59,256 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:11:59,256 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:11:59,256 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:11:59,256 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:11:59,256 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:11:59,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:11:59,257 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:11:59,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:11:59,257 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:11:59,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:11:59,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:11:59,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:11:59,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:11:59,259 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:11:59,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:11:59,259 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:11:59,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:11:59,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:11:59,260 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:11:59,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:11:59,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:11:59,260 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:11:59,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:11:59,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:11:59,261 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:11:59,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:11:59,261 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:11:59,261 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:11:59,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:11:59,503 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:11:59,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:11:59,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:11:59,532 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:11:59,532 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:11:59,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem14_label53.c [2023-04-01 04:12:00,769 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:12:01,063 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:12:01,064 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem14_label53.c [2023-04-01 04:12:01,090 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc8c2142/4daacdba81074532a846022aad42b8e4/FLAG03ada25c0 [2023-04-01 04:12:01,106 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccc8c2142/4daacdba81074532a846022aad42b8e4 [2023-04-01 04:12:01,110 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:12:01,112 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:12:01,113 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:12:01,113 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:12:01,116 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:12:01,117 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,118 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ddec582 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01, skipping insertion in model container [2023-04-01 04:12:01,119 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,125 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:12:01,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:12:01,372 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/Problem14_label53.c[5103,5116] [2023-04-01 04:12:01,571 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:12:01,580 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:12:01,609 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/Problem14_label53.c[5103,5116] [2023-04-01 04:12:01,682 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:12:01,700 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:12:01,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01 WrapperNode [2023-04-01 04:12:01,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:12:01,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:12:01,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:12:01,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:12:01,715 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,715 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,735 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,735 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,781 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,787 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,793 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,800 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:12:01,801 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:12:01,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:12:01,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:12:01,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (1/1) ... [2023-04-01 04:12:01,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:12:01,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:12:01,851 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:12:01,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:12:01,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:12:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:12:01,886 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:12:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-04-01 04:12:01,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:12:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-04-01 04:12:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:12:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:12:01,887 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:12:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:12:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:12:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:12:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:12:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:12:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:12:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:12:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:12:01,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:12:01,889 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:12:01,972 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:12:01,976 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:12:03,220 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:12:07,327 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:12:07,328 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-01 04:12:07,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:12:07 BoogieIcfgContainer [2023-04-01 04:12:07,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:12:07,333 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:12:07,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:12:07,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:12:07,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:12:01" (1/3) ... [2023-04-01 04:12:07,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6346af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:12:07, skipping insertion in model container [2023-04-01 04:12:07,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:12:01" (2/3) ... [2023-04-01 04:12:07,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a6346af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:12:07, skipping insertion in model container [2023-04-01 04:12:07,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:12:07" (3/3) ... [2023-04-01 04:12:07,339 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem14_label53.c [2023-04-01 04:12:07,357 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:12:07,357 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:12:07,410 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:12:07,416 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;@2f93de3a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:12:07,416 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:12:07,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 04:12:07,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-01 04:12:07,430 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:12:07,431 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:12:07,431 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:12:07,435 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:12:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash 751696890, now seen corresponding path program 1 times [2023-04-01 04:12:07,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:12:07,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612096154] [2023-04-01 04:12:07,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:12:07,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:12:07,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:12:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:12:07,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:12:07,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612096154] [2023-04-01 04:12:07,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612096154] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:12:07,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:12:07,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 04:12:07,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386077434] [2023-04-01 04:12:07,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:12:07,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 04:12:07,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:12:07,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 04:12:07,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:12:07,866 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:12:07,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:12:07,953 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-04-01 04:12:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 04:12:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-04-01 04:12:07,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:12:07,962 INFO L225 Difference]: With dead ends: 43 [2023-04-01 04:12:07,962 INFO L226 Difference]: Without dead ends: 21 [2023-04-01 04:12:07,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 04:12:07,972 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:12:07,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:12:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-04-01 04:12:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-04-01 04:12:08,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 04:12:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-04-01 04:12:08,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 11 [2023-04-01 04:12:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:12:08,008 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-04-01 04:12:08,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 04:12:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-04-01 04:12:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 04:12:08,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:12:08,010 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:12:08,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:12:08,011 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:12:08,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:12:08,012 INFO L85 PathProgramCache]: Analyzing trace with hash -133412671, now seen corresponding path program 1 times [2023-04-01 04:12:08,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:12:08,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819301434] [2023-04-01 04:12:08,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:12:08,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:12:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat