/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/eca-rers2012/Problem15_label57.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:14:35,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:14:35,177 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:14:35,209 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:14:35,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:14:35,211 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:14:35,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:14:35,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:14:35,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:14:35,216 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:14:35,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:14:35,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:14:35,218 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:14:35,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:14:35,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:14:35,221 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:14:35,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:14:35,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:14:35,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:14:35,225 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:14:35,227 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:14:35,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:14:35,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:14:35,229 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:14:35,233 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:14:35,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:14:35,233 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:14:35,234 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:14:35,234 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:14:35,235 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:14:35,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:14:35,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:14:35,236 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:14:35,237 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:14:35,238 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:14:35,238 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:14:35,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:14:35,239 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:14:35,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:14:35,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:14:35,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:14:35,241 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:14:35,264 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:14:35,264 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:14:35,264 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:14:35,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:14:35,265 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:14:35,265 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:14:35,265 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:14:35,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:14:35,266 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:14:35,266 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:14:35,266 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:14:35,266 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:14:35,266 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:14:35,266 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:14:35,267 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:14:35,267 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:14:35,267 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:14:35,267 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:14:35,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:14:35,268 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:14:35,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:14:35,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:14:35,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:14:35,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:14:35,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:14:35,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:14:35,269 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:14:35,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:14:35,269 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:14:35,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:14:35,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:14:35,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:14:35,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:14:35,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:14:35,270 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:14:35,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:14:35,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:14:35,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:14:35,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:14:35,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:14:35,271 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:14:35,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:14:35,470 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:14:35,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:14:35,491 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:14:35,492 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:14:35,493 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:14:35,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label57.c [2023-03-31 22:14:36,739 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:14:37,075 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:14:37,076 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label57.c [2023-03-31 22:14:37,096 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0275deae7/b73434e11ceb4b9e8c5b47be7f1cbc63/FLAGc6e924a15 [2023-03-31 22:14:37,112 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0275deae7/b73434e11ceb4b9e8c5b47be7f1cbc63 [2023-03-31 22:14:37,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:14:37,117 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:14:37,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:14:37,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:14:37,124 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:14:37,125 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:37,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10e340f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37, skipping insertion in model container [2023-03-31 22:14:37,127 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:37,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:14:37,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:14:37,393 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label57.c[5113,5126] [2023-03-31 22:14:37,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:14:37,774 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:14:37,805 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label57.c[5113,5126] [2023-03-31 22:14:37,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:14:37,997 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:14:37,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37 WrapperNode [2023-03-31 22:14:37,998 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:14:37,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:14:37,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:14:38,000 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:14:38,010 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:38,010 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:38,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:38,047 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:38,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:38,125 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:38,143 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:38,159 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:38,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:14:38,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:14:38,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:14:38,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:14:38,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (1/1) ... [2023-03-31 22:14:38,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:14:38,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:14:38,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:14:38,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:14:38,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:14:38,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:14:38,239 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:14:38,239 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2023-03-31 22:14:38,239 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2023-03-31 22:14:38,239 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:14:38,239 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2023-03-31 22:14:38,239 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2023-03-31 22:14:38,239 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:14:38,240 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:14:38,241 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:14:38,241 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:14:38,315 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:14:38,317 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:14:40,626 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:14:41,301 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:14:41,302 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:14:41,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:14:41 BoogieIcfgContainer [2023-03-31 22:14:41,305 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:14:41,308 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:14:41,308 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:14:41,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:14:41,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:14:37" (1/3) ... [2023-03-31 22:14:41,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d486d45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:14:41, skipping insertion in model container [2023-03-31 22:14:41,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:14:37" (2/3) ... [2023-03-31 22:14:41,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d486d45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:14:41, skipping insertion in model container [2023-03-31 22:14:41,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:14:41" (3/3) ... [2023-03-31 22:14:41,313 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem15_label57.c [2023-03-31 22:14:41,330 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:14:41,331 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:14:41,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:14:41,387 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;@1c96bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:14:41,387 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:14:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-03-31 22:14:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:14:41,400 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:41,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:41,401 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:41,405 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash 468032164, now seen corresponding path program 1 times [2023-03-31 22:14:41,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:41,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308584609] [2023-03-31 22:14:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:41,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:41,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:14:41,776 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:41,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308584609] [2023-03-31 22:14:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308584609] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:14:41,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:14:41,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:14:41,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870940082] [2023-03-31 22:14:41,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:14:41,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:14:41,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:14:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:14:41,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:14:41,826 INFO L87 Difference]: Start difference. First operand has 244 states, 234 states have (on average 1.9572649572649572) internal successors, (458), 235 states have internal predecessors, (458), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:14:43,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:14:43,546 INFO L93 Difference]: Finished difference Result 720 states and 1390 transitions. [2023-03-31 22:14:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:14:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:14:43,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:14:43,563 INFO L225 Difference]: With dead ends: 720 [2023-03-31 22:14:43,563 INFO L226 Difference]: Without dead ends: 473 [2023-03-31 22:14:43,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:14:43,571 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 248 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-03-31 22:14:43,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 177 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-03-31 22:14:43,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-03-31 22:14:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 473. [2023-03-31 22:14:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 461 states have (on average 1.596529284164859) internal successors, (736), 461 states have internal predecessors, (736), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-03-31 22:14:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 749 transitions. [2023-03-31 22:14:43,634 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 749 transitions. Word has length 11 [2023-03-31 22:14:43,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:14:43,634 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 749 transitions. [2023-03-31 22:14:43,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:14:43,634 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 749 transitions. [2023-03-31 22:14:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-03-31 22:14:43,636 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:43,636 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:43,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:14:43,636 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:43,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1069738675, now seen corresponding path program 1 times [2023-03-31 22:14:43,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:43,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204472506] [2023-03-31 22:14:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:43,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:43,901 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:14:43,902 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:43,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204472506] [2023-03-31 22:14:43,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204472506] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:14:43,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:14:43,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:14:43,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553243984] [2023-03-31 22:14:43,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:14:43,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:14:43,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:14:43,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:14:43,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:14:43,905 INFO L87 Difference]: Start difference. First operand 473 states and 749 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:14:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:14:46,682 INFO L93 Difference]: Finished difference Result 1426 states and 2281 transitions. [2023-03-31 22:14:46,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:14:46,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2023-03-31 22:14:46,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:14:46,688 INFO L225 Difference]: With dead ends: 1426 [2023-03-31 22:14:46,688 INFO L226 Difference]: Without dead ends: 958 [2023-03-31 22:14:46,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:14:46,691 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 670 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1784 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 2012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 1784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-03-31 22:14:46,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [670 Valid, 56 Invalid, 2012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 1784 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-03-31 22:14:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 958 states. [2023-03-31 22:14:46,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 958 to 940. [2023-03-31 22:14:46,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 916 states have (on average 1.490174672489083) internal successors, (1365), 924 states have internal predecessors, (1365), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (32), 7 states have call predecessors, (32), 7 states have call successors, (32) [2023-03-31 22:14:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1405 transitions. [2023-03-31 22:14:46,741 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1405 transitions. Word has length 31 [2023-03-31 22:14:46,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:14:46,742 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1405 transitions. [2023-03-31 22:14:46,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:14:46,742 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1405 transitions. [2023-03-31 22:14:46,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-03-31 22:14:46,743 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:46,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:46,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:14:46,744 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:46,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:46,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1279440171, now seen corresponding path program 1 times [2023-03-31 22:14:46,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:46,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176090467] [2023-03-31 22:14:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:46,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:14:46,969 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176090467] [2023-03-31 22:14:46,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176090467] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:14:46,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:14:46,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:14:46,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953410789] [2023-03-31 22:14:46,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:14:46,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:14:46,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:14:46,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:14:46,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:14:46,975 INFO L87 Difference]: Start difference. First operand 940 states and 1405 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:14:49,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:14:49,168 INFO L93 Difference]: Finished difference Result 2858 states and 4365 transitions. [2023-03-31 22:14:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:14:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 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 35 [2023-03-31 22:14:49,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:14:49,178 INFO L225 Difference]: With dead ends: 2858 [2023-03-31 22:14:49,178 INFO L226 Difference]: Without dead ends: 1923 [2023-03-31 22:14:49,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-03-31 22:14:49,181 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 820 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 1674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:14:49,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 47 Invalid, 1674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-03-31 22:14:49,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-03-31 22:14:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1666. [2023-03-31 22:14:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1666 states, 1616 states have (on average 1.3409653465346534) internal successors, (2167), 1640 states have internal predecessors, (2167), 13 states have call successors, (13), 13 states have call predecessors, (13), 36 states have return successors, (82), 12 states have call predecessors, (82), 12 states have call successors, (82) [2023-03-31 22:14:49,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1666 states to 1666 states and 2262 transitions. [2023-03-31 22:14:49,241 INFO L78 Accepts]: Start accepts. Automaton has 1666 states and 2262 transitions. Word has length 35 [2023-03-31 22:14:49,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:14:49,242 INFO L495 AbstractCegarLoop]: Abstraction has 1666 states and 2262 transitions. [2023-03-31 22:14:49,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:14:49,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1666 states and 2262 transitions. [2023-03-31 22:14:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-03-31 22:14:49,251 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:49,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:49,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:14:49,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:49,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:49,255 INFO L85 PathProgramCache]: Analyzing trace with hash -720855830, now seen corresponding path program 1 times [2023-03-31 22:14:49,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:49,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780938440] [2023-03-31 22:14:49,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:49,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:14:49,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:49,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780938440] [2023-03-31 22:14:49,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780938440] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:14:49,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:14:49,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:14:49,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530503090] [2023-03-31 22:14:49,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:14:49,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:14:49,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:14:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:14:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:14:49,632 INFO L87 Difference]: Start difference. First operand 1666 states and 2262 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:14:51,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:14:51,117 INFO L93 Difference]: Finished difference Result 4256 states and 5993 transitions. [2023-03-31 22:14:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:14:51,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 152 [2023-03-31 22:14:51,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:14:51,129 INFO L225 Difference]: With dead ends: 4256 [2023-03-31 22:14:51,130 INFO L226 Difference]: Without dead ends: 2595 [2023-03-31 22:14:51,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:14:51,135 INFO L413 NwaCegarLoop]: 400 mSDtfsCounter, 225 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 416 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:14:51,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 416 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-03-31 22:14:51,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2023-03-31 22:14:51,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2513. [2023-03-31 22:14:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2513 states, 2451 states have (on average 1.266829865361077) internal successors, (3105), 2479 states have internal predecessors, (3105), 17 states have call successors, (17), 17 states have call predecessors, (17), 44 states have return successors, (142), 16 states have call predecessors, (142), 16 states have call successors, (142) [2023-03-31 22:14:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2513 states to 2513 states and 3264 transitions. [2023-03-31 22:14:51,237 INFO L78 Accepts]: Start accepts. Automaton has 2513 states and 3264 transitions. Word has length 152 [2023-03-31 22:14:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:14:51,239 INFO L495 AbstractCegarLoop]: Abstraction has 2513 states and 3264 transitions. [2023-03-31 22:14:51,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:14:51,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2513 states and 3264 transitions. [2023-03-31 22:14:51,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2023-03-31 22:14:51,248 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:14:51,249 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:14:51,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:14:51,250 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:14:51,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:14:51,250 INFO L85 PathProgramCache]: Analyzing trace with hash 140614820, now seen corresponding path program 1 times [2023-03-31 22:14:51,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:14:51,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682692003] [2023-03-31 22:14:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:51,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:14:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 22:14:51,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:14:51,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682692003] [2023-03-31 22:14:51,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682692003] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:14:51,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999161323] [2023-03-31 22:14:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:14:51,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:14:51,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:14:51,789 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:14:51,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:14:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:14:52,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 4 conjunts are in the unsatisfiable core [2023-03-31 22:14:52,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:14:52,146 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 22:14:52,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:14:52,298 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-03-31 22:14:52,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999161323] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:14:52,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126499402] [2023-03-31 22:14:52,343 INFO L159 IcfgInterpreter]: Started Sifa with 148 locations of interest [2023-03-31 22:14:52,343 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:14:52,346 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:14:52,351 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:14:52,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:14:52,541 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 51 for LOIs [2023-03-31 22:14:52,877 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 35 [2023-03-31 22:14:53,253 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 26 [2023-03-31 22:14:53,354 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 8009 conjuctions. This might take some time... [2023-03-31 22:14:53,462 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 182 conjuctions. [2023-03-31 22:14:54,636 INFO L197 IcfgInterpreter]: Interpreting procedure calculate_output with input of size 42 for LOIs [2023-03-31 22:14:54,746 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 35 [2023-03-31 22:14:54,921 WARN L176 XnfTransformerHelper]: Simplifying disjunction of 5034 conjuctions. This might take some time... [2023-03-31 22:14:55,036 INFO L192 XnfTransformerHelper]: Simplified to disjunction of 100 conjuctions. [2023-03-31 22:15:07,855 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 26