/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:33:56,431 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:33:56,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:33:56,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:33:56,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:33:56,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:33:56,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:33:56,498 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:33:56,501 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:33:56,505 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:33:56,506 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:33:56,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:33:56,507 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:33:56,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:33:56,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:33:56,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:33:56,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:33:56,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:33:56,520 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:33:56,528 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:33:56,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:33:56,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:33:56,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:33:56,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:33:56,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:33:56,538 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:33:56,538 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:33:56,541 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:33:56,542 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:33:56,544 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:33:56,544 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:33:56,545 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:33:56,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:33:56,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:33:56,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:33:56,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:33:56,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:33:56,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:33:56,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:33:56,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:33:56,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:33:56,555 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 [2020-09-24 21:33:56,604 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:33:56,604 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:33:56,607 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:33:56,607 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:33:56,607 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:33:56,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:33:56,608 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:33:56,608 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:33:56,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:33:56,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:33:56,610 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:33:56,610 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:33:56,610 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:33:56,610 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:33:56,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:33:56,611 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:33:56,611 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:33:56,611 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:33:56,611 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:33:56,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:33:56,612 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:33:56,612 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:33:56,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:33:56,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:33:56,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:33:56,613 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:33:56,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:33:56,613 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:33:56,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:33:56,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:33:57,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:33:57,090 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:33:57,095 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:33:57,098 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:33:57,098 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:33:57,100 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-24 21:33:57,187 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/390cf6fb9/da33ea786dcb4769b9abe0413b7f0a32/FLAGa57db03aa [2020-09-24 21:33:57,662 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:33:57,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-24 21:33:57,671 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/390cf6fb9/da33ea786dcb4769b9abe0413b7f0a32/FLAGa57db03aa [2020-09-24 21:33:58,013 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/390cf6fb9/da33ea786dcb4769b9abe0413b7f0a32 [2020-09-24 21:33:58,026 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:33:58,032 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:33:58,034 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:33:58,034 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:33:58,038 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:33:58,039 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:33:58" (1/1) ... [2020-09-24 21:33:58,043 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab41b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58, skipping insertion in model container [2020-09-24 21:33:58,044 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:33:58" (1/1) ... [2020-09-24 21:33:58,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:33:58,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:33:58,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:33:58,286 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:33:58,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:33:58,318 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:33:58,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58 WrapperNode [2020-09-24 21:33:58,319 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:33:58,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:33:58,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:33:58,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:33:58,334 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58" (1/1) ... [2020-09-24 21:33:58,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58" (1/1) ... [2020-09-24 21:33:58,340 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58" (1/1) ... [2020-09-24 21:33:58,341 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58" (1/1) ... [2020-09-24 21:33:58,429 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58" (1/1) ... [2020-09-24 21:33:58,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58" (1/1) ... [2020-09-24 21:33:58,436 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58" (1/1) ... [2020-09-24 21:33:58,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:33:58,439 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:33:58,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:33:58,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:33:58,441 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58" (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 [2020-09-24 21:33:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:33:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:33:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-24 21:33:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-24 21:33:58,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:33:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 21:33:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:33:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-24 21:33:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-24 21:33:58,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:33:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:33:58,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:33:58,751 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:33:58,751 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 21:33:58,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:33:58 BoogieIcfgContainer [2020-09-24 21:33:58,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:33:58,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:33:58,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:33:58,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:33:58,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:33:58" (1/3) ... [2020-09-24 21:33:58,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4faee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:33:58, skipping insertion in model container [2020-09-24 21:33:58,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:33:58" (2/3) ... [2020-09-24 21:33:58,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a4faee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:33:58, skipping insertion in model container [2020-09-24 21:33:58,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:33:58" (3/3) ... [2020-09-24 21:33:58,769 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-24 21:33:58,781 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:33:58,793 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:33:58,821 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:33:58,871 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:33:58,871 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:33:58,871 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:33:58,876 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:33:58,876 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:33:58,876 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:33:58,876 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:33:58,877 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:33:58,908 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-24 21:33:58,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 21:33:58,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:33:58,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:33:58,920 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:33:58,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:33:58,929 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-09-24 21:33:58,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:33:58,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722207880] [2020-09-24 21:33:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:33:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:33:59,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:33:59,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:33:59,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:33:59,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:33:59,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 75 [2020-09-24 21:33:59,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:33:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:33:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 21:33:59,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:33:59,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:33:59,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:33:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:33:59,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:33:59,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:33:59,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:33:59,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:33:59,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:33:59,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:33:59,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:33:59,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:33:59,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:33:59,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:33:59,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 21:33:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:33:59,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:33:59,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:33:59,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:33:59,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:33:59,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 21:33:59,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:33:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:33:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:33:59,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:33:59,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:33:59,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:33:59,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722207880] [2020-09-24 21:33:59,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:33:59,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:33:59,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772498084] [2020-09-24 21:33:59,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:33:59,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:33:59,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:33:59,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:33:59,340 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-09-24 21:33:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:33:59,427 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-24 21:33:59,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:33:59,429 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 21:33:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:33:59,444 INFO L225 Difference]: With dead ends: 51 [2020-09-24 21:33:59,444 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 21:33:59,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:33:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 21:33:59,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-24 21:33:59,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 21:33:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-24 21:33:59,510 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-09-24 21:33:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:33:59,510 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-24 21:33:59,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:33:59,511 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-24 21:33:59,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 21:33:59,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:33:59,514 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, 1, 1, 1, 1] [2020-09-24 21:33:59,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:33:59,514 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:33:59,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:33:59,515 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-09-24 21:33:59,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:33:59,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523953615] [2020-09-24 21:33:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:33:59,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:33:59,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:33:59,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:33:59,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 21:33:59,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:33:59,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-09-24 21:33:59,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:33:59,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 21:33:59,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 21:33:59,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:33:59,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:33:59,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:33:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:33:59,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:33:59,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:33:59,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:33:59,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:33:59,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:33:59,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:33:59,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:33:59,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:33:59,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:33:59,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:33:59,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 21:33:59,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:33:59,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:00,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:00,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:34:00,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:00,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-09-24 21:34:00,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:00,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:34:00,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:00,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:34:00,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:00,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 21:34:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:00,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:00,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:00,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:34:00,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:00,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-09-24 21:34:00,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:00,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:34:00,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:00,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:34:00,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:00,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:34:00,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523953615] [2020-09-24 21:34:00,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:34:00,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 21:34:00,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967197784] [2020-09-24 21:34:00,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 21:34:00,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:34:00,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 21:34:00,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:34:00,146 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-09-24 21:34:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:34:00,274 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-09-24 21:34:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 21:34:00,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-24 21:34:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:34:00,276 INFO L225 Difference]: With dead ends: 66 [2020-09-24 21:34:00,277 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 21:34:00,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:34:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 21:34:00,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 21:34:00,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 21:34:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-24 21:34:00,291 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-09-24 21:34:00,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:34:00,292 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-24 21:34:00,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 21:34:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-24 21:34:00,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 21:34:00,295 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:34:00,296 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:34:00,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:34:00,296 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:34:00,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:34:00,297 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-09-24 21:34:00,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:34:00,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489278655] [2020-09-24 21:34:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:34:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:00,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:00,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:00,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:01,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:01,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 21:34:01,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 21:34:01,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 793 [2020-09-24 21:34:01,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:34:01,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 21:34:01,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:34:01,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:01,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:34:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:01,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:01,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:01,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:34:01,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:01,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:34:01,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:34:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:01,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:34:01,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:34:01,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 21:34:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:01,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:01,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:01,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:01,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 21:34:01,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:34:01,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 235 [2020-09-24 21:34:01,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:34:01,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 21:34:01,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:34:01,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:01,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 21:34:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:01,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:01,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:01,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 21:34:01,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:01,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-24 21:34:01,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:01,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:34:01,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 21:34:01,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:34:01,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:01,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 21:34:01,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:34:01,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:34:01,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:34:01,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 21:34:01,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:34:01,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-24 21:34:01,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:34:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 21:34:01,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:34:01,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:34:01,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:34:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 21:34:01,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489278655] [2020-09-24 21:34:01,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:34:01,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:34:01,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079927020] [2020-09-24 21:34:01,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:34:01,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:34:01,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:34:01,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:34:01,549 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-09-24 21:34:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:34:01,602 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-09-24 21:34:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:34:01,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-24 21:34:01,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:34:01,604 INFO L225 Difference]: With dead ends: 69 [2020-09-24 21:34:01,604 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 21:34:01,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:34:01,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 21:34:01,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-24 21:34:01,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 21:34:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-24 21:34:01,613 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-24 21:34:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:34:01,614 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-24 21:34:01,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:34:01,614 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-24 21:34:01,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 21:34:01,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:34:01,616 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, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:34:01,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:34:01,616 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:34:01,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:34:01,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-09-24 21:34:01,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:34:01,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097843212] [2020-09-24 21:34:01,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:34:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 21:34:01,628 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 21:34:01,628 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 21:34:01,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:34:01,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:34:01 BoogieIcfgContainer [2020-09-24 21:34:01,657 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:34:01,661 INFO L168 Benchmark]: Toolchain (without parser) took 3630.72 ms. Allocated memory was 141.0 MB in the beginning and 243.8 MB in the end (delta: 102.8 MB). Free memory was 104.3 MB in the beginning and 208.3 MB in the end (delta: -104.0 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 21:34:01,662 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 21:34:01,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.03 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 94.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 21:34:01,664 INFO L168 Benchmark]: Boogie Preprocessor took 118.98 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 94.1 MB in the beginning and 184.1 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:34:01,665 INFO L168 Benchmark]: RCFGBuilder took 318.03 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 170.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-09-24 21:34:01,666 INFO L168 Benchmark]: TraceAbstraction took 2898.17 ms. Allocated memory was 205.0 MB in the beginning and 243.8 MB in the end (delta: 38.8 MB). Free memory was 170.1 MB in the beginning and 208.3 MB in the end (delta: -38.2 MB). Peak memory consumption was 559.6 kB. Max. memory is 7.1 GB. [2020-09-24 21:34:01,669 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 286.03 ms. Allocated memory is still 141.0 MB. Free memory was 103.6 MB in the beginning and 94.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 118.98 ms. Allocated memory was 141.0 MB in the beginning and 205.0 MB in the end (delta: 64.0 MB). Free memory was 94.1 MB in the beginning and 184.1 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.03 ms. Allocated memory is still 205.0 MB. Free memory was 184.1 MB in the beginning and 170.1 MB in the end (delta: 14.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2898.17 ms. Allocated memory was 205.0 MB in the beginning and 243.8 MB in the end (delta: 38.8 MB). Free memory was 170.1 MB in the beginning and 208.3 MB in the end (delta: -38.2 MB). Peak memory consumption was 559.6 kB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); [L23] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L15] COND FALSE !(x==0) [L16] CALL, EXPR id(x-1) [L8] COND TRUE x==0 [L8] return 0; [L16] RET, EXPR id(x-1) [L16] unsigned int ret = id(x-1) + 1; [L17] COND FALSE !(ret > 3) [L18] return ret; [L9] RET, EXPR id2(x-1) [L9] unsigned int ret = id2(x-1) + 1; [L10] COND FALSE !(ret > 3) [L11] return ret; [L23] RET, EXPR id(input) [L23] unsigned int result = id(input); [L24] COND TRUE result == 2 [L25] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.7s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 113 SDtfs, 11 SDslu, 425 SDs, 0 SdLazy, 64 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=3, 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, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 72 ConstructedInterpolants, 0 QuantifiedInterpolants, 5190 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 4/4 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...