/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 17:23:46,257 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 17:23:46,260 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 17:23:46,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 17:23:46,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 17:23:46,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 17:23:46,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 17:23:46,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 17:23:46,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 17:23:46,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 17:23:46,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 17:23:46,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 17:23:46,318 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 17:23:46,320 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 17:23:46,321 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 17:23:46,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 17:23:46,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 17:23:46,324 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 17:23:46,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 17:23:46,329 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 17:23:46,330 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 17:23:46,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 17:23:46,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 17:23:46,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 17:23:46,337 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 17:23:46,337 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 17:23:46,338 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 17:23:46,339 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 17:23:46,339 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 17:23:46,340 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 17:23:46,341 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 17:23:46,341 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 17:23:46,342 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 17:23:46,343 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 17:23:46,344 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 17:23:46,345 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 17:23:46,346 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 17:23:46,346 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 17:23:46,346 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 17:23:46,347 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 17:23:46,348 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 17:23:46,353 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 17:23:46,393 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 17:23:46,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 17:23:46,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 17:23:46,396 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 17:23:46,397 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 17:23:46,397 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 17:23:46,397 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 17:23:46,397 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 17:23:46,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 17:23:46,398 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 17:23:46,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 17:23:46,399 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 17:23:46,399 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 17:23:46,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 17:23:46,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 17:23:46,400 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 17:23:46,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 17:23:46,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 17:23:46,400 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 17:23:46,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 17:23:46,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 17:23:46,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:23:46,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 17:23:46,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 17:23:46,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 17:23:46,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 17:23:46,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 17:23:46,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 17:23:46,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 17:23:46,403 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 17:23:46,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 17:23:46,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 17:23:46,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 17:23:46,819 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 17:23:46,822 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 17:23:46,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-10-28 17:23:46,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c9e7eab5/1769ad5b67d545f8a54b6db4f6ec0315/FLAGbb75f7c86 [2020-10-28 17:23:47,471 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 17:23:47,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-10-28 17:23:47,478 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c9e7eab5/1769ad5b67d545f8a54b6db4f6ec0315/FLAGbb75f7c86 [2020-10-28 17:23:47,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7c9e7eab5/1769ad5b67d545f8a54b6db4f6ec0315 [2020-10-28 17:23:47,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 17:23:47,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 17:23:47,869 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 17:23:47,869 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 17:23:47,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 17:23:47,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:23:47" (1/1) ... [2020-10-28 17:23:47,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2deb5c08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:47, skipping insertion in model container [2020-10-28 17:23:47,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 05:23:47" (1/1) ... [2020-10-28 17:23:47,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 17:23:47,906 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 17:23:48,058 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:23:48,069 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 17:23:48,085 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 17:23:48,100 INFO L208 MainTranslator]: Completed translation [2020-10-28 17:23:48,101 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48 WrapperNode [2020-10-28 17:23:48,101 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 17:23:48,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 17:23:48,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 17:23:48,102 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 17:23:48,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48" (1/1) ... [2020-10-28 17:23:48,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48" (1/1) ... [2020-10-28 17:23:48,121 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48" (1/1) ... [2020-10-28 17:23:48,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48" (1/1) ... [2020-10-28 17:23:48,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48" (1/1) ... [2020-10-28 17:23:48,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48" (1/1) ... [2020-10-28 17:23:48,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48" (1/1) ... [2020-10-28 17:23:48,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 17:23:48,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 17:23:48,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 17:23:48,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 17:23:48,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 17:23:48,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 17:23:48,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 17:23:48,204 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 17:23:48,204 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-28 17:23:48,204 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-10-28 17:23:48,204 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 17:23:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 17:23:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 17:23:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 17:23:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 17:23:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 17:23:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-28 17:23:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-10-28 17:23:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 17:23:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 17:23:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 17:23:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 17:23:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 17:23:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 17:23:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 17:23:48,428 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 17:23:48,429 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 17:23:48,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:23:48 BoogieIcfgContainer [2020-10-28 17:23:48,431 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 17:23:48,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 17:23:48,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 17:23:48,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 17:23:48,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 05:23:47" (1/3) ... [2020-10-28 17:23:48,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f389587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:23:48, skipping insertion in model container [2020-10-28 17:23:48,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 05:23:48" (2/3) ... [2020-10-28 17:23:48,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f389587 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 05:23:48, skipping insertion in model container [2020-10-28 17:23:48,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 05:23:48" (3/3) ... [2020-10-28 17:23:48,440 INFO L111 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2020-10-28 17:23:48,452 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 17:23:48,457 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 17:23:48,472 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 17:23:48,500 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 17:23:48,500 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 17:23:48,501 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 17:23:48,501 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 17:23:48,501 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 17:23:48,501 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 17:23:48,501 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 17:23:48,501 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 17:23:48,523 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-28 17:23:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 17:23:48,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:48,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:23:48,533 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:48,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1481297807, now seen corresponding path program 1 times [2020-10-28 17:23:48,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:48,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965863385] [2020-10-28 17:23:48,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:48,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:48,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:49,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:49,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:23:49,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:49,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 638 [2020-10-28 17:23:49,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:49,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:49,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:49,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:23:49,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:23:49,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 17:23:49,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:49,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:49,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:49,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:49,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:49,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:49,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 17:23:49,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:49,523 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:49,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:49,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:49,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:49,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:49,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:49,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:49,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:49,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:23:49,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:49,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 17:23:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:23:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 17:23:49,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:49,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:23:49,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965863385] [2020-10-28 17:23:49,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:49,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 17:23:49,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384929525] [2020-10-28 17:23:49,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 17:23:49,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:49,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 17:23:49,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 17:23:49,603 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 6 states. [2020-10-28 17:23:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:49,866 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2020-10-28 17:23:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 17:23:49,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-28 17:23:49,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:49,878 INFO L225 Difference]: With dead ends: 42 [2020-10-28 17:23:49,878 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 17:23:49,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 17:23:49,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 17:23:49,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 17:23:49,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 17:23:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-10-28 17:23:49,932 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2020-10-28 17:23:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:49,932 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-10-28 17:23:49,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 17:23:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-10-28 17:23:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 17:23:49,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:49,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:23:49,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 17:23:49,935 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:49,937 INFO L82 PathProgramCache]: Analyzing trace with hash 262491562, now seen corresponding path program 1 times [2020-10-28 17:23:49,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:49,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562002459] [2020-10-28 17:23:49,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:49,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:50,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:50,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:50,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 17:23:50,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:50,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-28 17:23:50,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:50,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:50,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:23:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:23:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 17:23:50,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:50,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:50,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:50,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:50,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:50,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:50,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 17:23:50,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:50,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:50,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:50,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:50,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:50,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:50,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:50,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 17:23:50,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:50,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-28 17:23:50,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:50,681 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:50,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 17:23:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:23:50,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 17:23:50,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:50,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:50,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:50,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:50,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:50,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:50,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:50,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 17:23:50,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:50,716 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:50,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:23:50,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:50,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 17:23:50,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 17:23:50,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562002459] [2020-10-28 17:23:50,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 17:23:50,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 17:23:50,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972426070] [2020-10-28 17:23:50,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 17:23:50,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:50,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 17:23:50,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 17:23:50,750 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 8 states. [2020-10-28 17:23:51,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:51,067 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-28 17:23:51,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 17:23:51,067 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-28 17:23:51,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:51,069 INFO L225 Difference]: With dead ends: 36 [2020-10-28 17:23:51,069 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 17:23:51,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-28 17:23:51,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 17:23:51,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-10-28 17:23:51,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 17:23:51,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-10-28 17:23:51,080 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 21 [2020-10-28 17:23:51,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:51,080 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-10-28 17:23:51,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 17:23:51,081 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-10-28 17:23:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 17:23:51,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:51,082 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 17:23:51,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 17:23:51,083 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:51,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:51,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1067256061, now seen corresponding path program 1 times [2020-10-28 17:23:51,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:51,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874924979] [2020-10-28 17:23:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:51,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:51,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:51,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:51,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:51,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 17:23:51,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:51,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 677 [2020-10-28 17:23:51,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:51,776 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 17:23:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:23:51,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 17:23:51,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:51,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:51,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:51,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:51,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:51,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:51,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:51,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:23:51,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:51,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:51,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:51,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:51,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:51,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:51,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:51,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:51,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:51,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:23:51,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:51,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 17:23:51,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:51,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 17:23:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:23:51,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 17:23:51,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:51,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:51,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:51,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:51,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 17:23:51,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:51,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 17:23:51,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:51,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:51,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 17:23:51,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:51,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 17:23:51,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:51,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:51,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:51,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:51,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:51,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:51,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:51,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:23:51,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:51,935 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:23:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:51,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 17:23:51,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:51,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 17:23:51,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874924979] [2020-10-28 17:23:51,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:23:51,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 17:23:51,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975858127] [2020-10-28 17:23:51,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 17:23:51,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:51,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 17:23:51,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 17:23:51,964 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 10 states. [2020-10-28 17:23:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:52,290 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-10-28 17:23:52,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 17:23:52,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-28 17:23:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:52,292 INFO L225 Difference]: With dead ends: 42 [2020-10-28 17:23:52,292 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 17:23:52,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-28 17:23:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 17:23:52,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2020-10-28 17:23:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-28 17:23:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-28 17:23:52,302 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2020-10-28 17:23:52,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:52,302 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-28 17:23:52,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 17:23:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-28 17:23:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 17:23:52,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:52,304 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:23:52,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 17:23:52,304 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:52,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1416908450, now seen corresponding path program 1 times [2020-10-28 17:23:52,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:52,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921935465] [2020-10-28 17:23:52,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:52,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:52,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:52,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:53,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:53,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 17:23:53,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:53,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 994 [2020-10-28 17:23:53,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:53,312 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:23:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:23:53,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 17:23:53,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:53,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:53,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:53,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:53,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:53,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:53,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 17:23:53,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:53,356 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:53,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:53,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:53,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:53,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:53,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:53,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:53,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:53,412 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 17:23:53,412 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:53,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 17:23:53,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:53,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:53,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 17:23:53,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:23:53,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 17:23:53,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:53,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:53,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:53,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:53,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:53,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:23:53,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:53,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-28 17:23:53,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:53,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:53,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 17:23:53,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:53,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:23:53,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:53,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:53,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:53,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:53,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:53,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 17:23:53,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:53,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 17:23:53,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:53,518 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 17:23:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:53,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 17:23:53,519 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:53,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:53,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:53,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:53,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:53,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 17:23:53,563 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:53,563 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:23:53,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:53,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 17:23:53,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 17:23:53,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921935465] [2020-10-28 17:23:53,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:23:53,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 17:23:53,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990045665] [2020-10-28 17:23:53,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 17:23:53,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:53,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 17:23:53,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 17:23:53,611 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 12 states. [2020-10-28 17:23:53,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:53,964 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-10-28 17:23:53,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 17:23:53,965 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 33 [2020-10-28 17:23:53,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:53,966 INFO L225 Difference]: With dead ends: 48 [2020-10-28 17:23:53,966 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 17:23:53,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-28 17:23:53,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 17:23:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 35. [2020-10-28 17:23:53,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 17:23:53,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-10-28 17:23:53,976 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 33 [2020-10-28 17:23:53,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:53,977 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-10-28 17:23:53,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 17:23:53,977 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-10-28 17:23:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 17:23:53,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:53,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:23:53,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 17:23:53,979 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:53,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:53,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1482575991, now seen corresponding path program 2 times [2020-10-28 17:23:53,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:53,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053264718] [2020-10-28 17:23:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:54,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:54,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:54,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 17:23:54,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 17:23:54,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 862 [2020-10-28 17:23:54,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:54,855 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:54,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 17:23:54,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 17:23:54,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 17:23:54,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:54,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 17:23:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:54,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:54,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:54,898 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 17:23:54,898 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:54,898 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:23:54,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:54,899 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 17:23:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:54,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 17:23:54,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:54,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-28 17:23:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:54,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:54,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:54,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 17:23:54,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:54,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 17:23:54,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:54,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 17:23:54,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 17:23:54,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 17:23:54,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:54,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:55,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:55,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:55,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-28 17:23:55,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:55,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 50 [2020-10-28 17:23:55,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:55,050 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:55,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 17:23:55,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:55,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 17:23:55,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 17:23:55,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:55,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:55,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:55,106 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:55,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-28 17:23:55,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:55,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-28 17:23:55,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:55,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:55,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 17:23:55,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:55,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 17:23:55,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:55,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:55,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:55,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:55,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 17:23:55,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:55,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 17:23:55,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:55,145 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:55,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 17:23:55,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:55,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 17:23:55,170 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 25 [2020-10-28 17:23:55,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-28 17:23:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 17:23:55,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 17:23:55,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 17:23:55,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 17:23:55,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 17:23:55,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 17:23:55,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 17:23:55,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 17:23:55,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 17:23:55,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 17:23:55,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 17:23:55,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 17:23:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 17:23:55,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053264718] [2020-10-28 17:23:55,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 17:23:55,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 17:23:55,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990984488] [2020-10-28 17:23:55,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 17:23:55,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 17:23:55,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 17:23:55,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 17:23:55,236 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 12 states. [2020-10-28 17:23:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 17:23:55,617 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-10-28 17:23:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 17:23:55,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-10-28 17:23:55,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 17:23:55,619 INFO L225 Difference]: With dead ends: 54 [2020-10-28 17:23:55,620 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 17:23:55,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2020-10-28 17:23:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 17:23:55,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-28 17:23:55,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 17:23:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-10-28 17:23:55,629 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 39 [2020-10-28 17:23:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 17:23:55,629 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-10-28 17:23:55,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 17:23:55,630 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-10-28 17:23:55,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 17:23:55,631 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 17:23:55,631 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 17:23:55,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 17:23:55,632 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 17:23:55,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 17:23:55,632 INFO L82 PathProgramCache]: Analyzing trace with hash -487565550, now seen corresponding path program 2 times [2020-10-28 17:23:55,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 17:23:55,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453348190] [2020-10-28 17:23:55,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 17:23:55,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-28 17:23:55,645 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-28 17:23:55,645 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 17:23:55,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 17:23:55,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 05:23:55 BoogieIcfgContainer [2020-10-28 17:23:55,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 17:23:55,670 INFO L168 Benchmark]: Toolchain (without parser) took 7806.75 ms. Allocated memory was 157.3 MB in the beginning and 282.1 MB in the end (delta: 124.8 MB). Free memory was 132.3 MB in the beginning and 179.1 MB in the end (delta: -46.8 MB). Peak memory consumption was 78.5 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:55,671 INFO L168 Benchmark]: CDTParser took 0.53 ms. Allocated memory is still 157.3 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 17:23:55,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.53 ms. Allocated memory is still 157.3 MB. Free memory was 131.7 MB in the beginning and 122.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:55,672 INFO L168 Benchmark]: Boogie Preprocessor took 28.38 ms. Allocated memory is still 157.3 MB. Free memory was 122.4 MB in the beginning and 121.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:55,673 INFO L168 Benchmark]: RCFGBuilder took 299.59 ms. Allocated memory is still 157.3 MB. Free memory was 121.0 MB in the beginning and 108.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:55,674 INFO L168 Benchmark]: TraceAbstraction took 7235.03 ms. Allocated memory was 157.3 MB in the beginning and 282.1 MB in the end (delta: 124.8 MB). Free memory was 107.6 MB in the beginning and 179.1 MB in the end (delta: -71.6 MB). Peak memory consumption was 53.4 MB. Max. memory is 8.0 GB. [2020-10-28 17:23:55,678 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.53 ms. Allocated memory is still 157.3 MB. Free memory is still 128.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 232.53 ms. Allocated memory is still 157.3 MB. Free memory was 131.7 MB in the beginning and 122.4 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 28.38 ms. Allocated memory is still 157.3 MB. Free memory was 122.4 MB in the beginning and 121.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 299.59 ms. Allocated memory is still 157.3 MB. Free memory was 121.0 MB in the beginning and 108.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7235.03 ms. Allocated memory was 157.3 MB in the beginning and 282.1 MB in the end (delta: 124.8 MB). Free memory was 107.6 MB in the beginning and 179.1 MB in the end (delta: -71.6 MB). Peak memory consumption was 53.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L20] int input = 5; [L21] CALL, EXPR id(input) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L10] COND FALSE !(x==0) [L11] CALL, EXPR id2(x-1) [L15] COND TRUE x==0 [L15] return 0; [L11] RET, EXPR id2(x-1) [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) [L11] return id2(x-1) + 1; [L16] RET, EXPR id(x-1) [L16] return id(x-1) + 1; [L11] RET, EXPR id2(x-1) [L11] return id2(x-1) + 1; [L21] RET, EXPR id(input) [L21] int result = id(input); [L22] COND TRUE result == 5 [L23] CALL reach_error() [L4] __assert_fail("0", "id2_i5_o5-1.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.1s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 96 SDtfs, 187 SDslu, 204 SDs, 0 SdLazy, 502 SolverSat, 98 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.9s InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 130 ConstructedInterpolants, 0 QuantifiedInterpolants, 12584 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 14/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...