/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=SHALLOWEST --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 23:47:54,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 23:47:54,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 23:47:54,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 23:47:54,407 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 23:47:54,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 23:47:54,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 23:47:54,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 23:47:54,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 23:47:54,431 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 23:47:54,432 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 23:47:54,433 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 23:47:54,433 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 23:47:54,436 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 23:47:54,440 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 23:47:54,442 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 23:47:54,443 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 23:47:54,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 23:47:54,447 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 23:47:54,455 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 23:47:54,457 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 23:47:54,458 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 23:47:54,459 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 23:47:54,460 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 23:47:54,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 23:47:54,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 23:47:54,465 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 23:47:54,468 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 23:47:54,469 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 23:47:54,471 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 23:47:54,471 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 23:47:54,472 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 23:47:54,473 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 23:47:54,474 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 23:47:54,475 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 23:47:54,475 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 23:47:54,476 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 23:47:54,476 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 23:47:54,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 23:47:54,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 23:47:54,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 23:47:54,480 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 23:47:54,525 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 23:47:54,525 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 23:47:54,528 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 23:47:54,528 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 23:47:54,529 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 23:47:54,529 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 23:47:54,529 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 23:47:54,530 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 23:47:54,530 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 23:47:54,530 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 23:47:54,531 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 23:47:54,531 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 23:47:54,531 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 23:47:54,532 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 23:47:54,532 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 23:47:54,532 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 23:47:54,532 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 23:47:54,533 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 23:47:54,533 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 23:47:54,533 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 23:47:54,533 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 23:47:54,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 23:47:54,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 23:47:54,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 23:47:54,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 23:47:54,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 23:47:54,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 23:47:54,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 23:47:54,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 23:47:54,537 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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;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=SHALLOWEST;log-additional-information=true; [2020-09-24 23:47:54,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 23:47:54,982 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 23:47:54,988 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 23:47:54,991 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 23:47:54,991 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 23:47:54,992 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-24 23:47:55,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09df59d4b/412beffa56d743658646daaf649e5735/FLAGd2acba6c8 [2020-09-24 23:47:55,613 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 23:47:55,614 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-24 23:47:55,623 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09df59d4b/412beffa56d743658646daaf649e5735/FLAGd2acba6c8 [2020-09-24 23:47:55,952 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/09df59d4b/412beffa56d743658646daaf649e5735 [2020-09-24 23:47:55,966 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 23:47:55,972 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 23:47:55,973 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 23:47:55,974 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 23:47:55,978 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 23:47:55,979 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:47:55" (1/1) ... [2020-09-24 23:47:55,983 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 11:47:55, skipping insertion in model container [2020-09-24 23:47:55,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:47:55" (1/1) ... [2020-09-24 23:47:55,992 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 23:47:56,017 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 23:47:56,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:47:56,230 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 23:47:56,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 23:47:56,268 INFO L208 MainTranslator]: Completed translation [2020-09-24 23:47:56,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56 WrapperNode [2020-09-24 23:47:56,269 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 23:47:56,270 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 23:47:56,270 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 23:47:56,270 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 23:47:56,284 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56" (1/1) ... [2020-09-24 23:47:56,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56" (1/1) ... [2020-09-24 23:47:56,290 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56" (1/1) ... [2020-09-24 23:47:56,290 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56" (1/1) ... [2020-09-24 23:47:56,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56" (1/1) ... [2020-09-24 23:47:56,374 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56" (1/1) ... [2020-09-24 23:47:56,375 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56" (1/1) ... [2020-09-24 23:47:56,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 23:47:56,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 23:47:56,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 23:47:56,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 23:47:56,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56" (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 23:47:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 23:47:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 23:47:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-24 23:47:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-24 23:47:56,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 23:47:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-24 23:47:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 23:47:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-24 23:47:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-24 23:47:56,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 23:47:56,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 23:47:56,459 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 23:47:56,687 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 23:47:56,687 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 23:47:56,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:47:56 BoogieIcfgContainer [2020-09-24 23:47:56,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 23:47:56,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 23:47:56,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 23:47:56,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 23:47:56,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:47:55" (1/3) ... [2020-09-24 23:47:56,700 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 11:47:56, skipping insertion in model container [2020-09-24 23:47:56,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:47:56" (2/3) ... [2020-09-24 23:47:56,700 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 11:47:56, skipping insertion in model container [2020-09-24 23:47:56,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:47:56" (3/3) ... [2020-09-24 23:47:56,703 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-24 23:47:56,715 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 23:47:56,725 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 23:47:56,746 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 23:47:56,777 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 23:47:56,777 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 23:47:56,778 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 23:47:56,778 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 23:47:56,778 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 23:47:56,778 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 23:47:56,778 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 23:47:56,779 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 23:47:56,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-24 23:47:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 23:47:56,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:47:56,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 23:47:56,810 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:47:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:47:56,816 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-09-24 23:47:56,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:47:56,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722207880] [2020-09-24 23:47:56,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:47:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:56,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:57,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:57,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 23:47:57,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:57,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 23:47:57,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:57,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:47:57,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-09-24 23:47:57,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:47:57,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 23:47:57,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:47:57,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:57,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:57,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:57,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:47:57,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:57,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:47:57,103 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:57,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:47:57,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:47:57,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:47:57,104 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:47:57,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 23:47:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:57,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:57,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:57,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:47:57,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:57,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 23:47:57,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:57,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 23:47:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:47:57,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:47:57,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:47:57,179 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 23:47:57,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722207880] [2020-09-24 23:47:57,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:47:57,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 23:47:57,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772498084] [2020-09-24 23:47:57,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 23:47:57,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:47:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 23:47:57,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 23:47:57,220 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-09-24 23:47:57,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:47:57,300 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-24 23:47:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 23:47:57,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 23:47:57,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:47:57,320 INFO L225 Difference]: With dead ends: 51 [2020-09-24 23:47:57,320 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 23:47:57,325 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 23:47:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 23:47:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-24 23:47:57,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 23:47:57,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-24 23:47:57,384 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-09-24 23:47:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:47:57,385 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-24 23:47:57,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 23:47:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-24 23:47:57,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 23:47:57,387 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:47:57,388 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 23:47:57,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 23:47:57,388 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:47:57,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:47:57,389 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-09-24 23:47:57,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:47:57,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523953615] [2020-09-24 23:47:57,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:47:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:57,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:57,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:57,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 23:47:57,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:57,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-09-24 23:47:57,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:57,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 23:47:57,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-09-24 23:47:57,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 23:47:57,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 23:47:57,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:47:57,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:57,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:57,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:57,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:47:57,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:57,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 23:47:57,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:57,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:47:57,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:47:57,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:47:57,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:47:57,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 23:47:57,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:57,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:57,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:57,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 23:47:57,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:57,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-09-24 23:47:57,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:57,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 23:47:57,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:47:57,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 23:47:57,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:47:57,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:47:57,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:58,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:58,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:58,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:47:58,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:58,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-24 23:47:58,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:58,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 23:47:58,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:47:58,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:47:58,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:47:58,088 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 23:47:58,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523953615] [2020-09-24 23:47:58,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:47:58,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-24 23:47:58,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967197784] [2020-09-24 23:47:58,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 23:47:58,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:47:58,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 23:47:58,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-24 23:47:58,100 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-09-24 23:47:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:47:58,268 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-09-24 23:47:58,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 23:47:58,269 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-24 23:47:58,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:47:58,271 INFO L225 Difference]: With dead ends: 66 [2020-09-24 23:47:58,271 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 23:47:58,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-24 23:47:58,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 23:47:58,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-24 23:47:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 23:47:58,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-24 23:47:58,282 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-09-24 23:47:58,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:47:58,283 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-24 23:47:58,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 23:47:58,283 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-24 23:47:58,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 23:47:58,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:47:58,285 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 23:47:58,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 23:47:58,285 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:47:58,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:47:58,286 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-09-24 23:47:58,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:47:58,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489278655] [2020-09-24 23:47:58,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:47:58,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:58,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:58,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:58,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:59,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:59,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 23:47:59,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-24 23:47:59,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 700 [2020-09-24 23:47:59,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:59,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:47:59,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-24 23:47:59,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:47:59,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:47:59,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 23:47:59,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:59,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:59,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:59,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 23:47:59,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:59,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 23:47:59,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:59,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 23:47:59,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:47:59,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 23:47:59,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:47:59,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-24 23:47:59,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:59,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:59,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:59,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:59,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 23:47:59,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 23:47:59,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 291 [2020-09-24 23:47:59,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:59,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:47:59,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-24 23:47:59,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:47:59,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:47:59,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:47:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:59,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:59,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:59,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 23:47:59,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:59,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-09-24 23:47:59,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:59,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 23:47:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-09-24 23:47:59,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:47:59,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 23:47:59,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-24 23:47:59,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 23:47:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 23:47:59,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 23:47:59,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-24 23:47:59,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 23:47:59,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 23:47:59,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-09-24 23:47:59,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 23:47:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 23:47:59,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 23:47:59,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 23:47:59,540 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 23:47:59,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489278655] [2020-09-24 23:47:59,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 23:47:59,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 23:47:59,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079927020] [2020-09-24 23:47:59,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 23:47:59,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 23:47:59,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 23:47:59,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 23:47:59,544 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-09-24 23:47:59,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 23:47:59,617 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-09-24 23:47:59,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 23:47:59,618 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-24 23:47:59,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 23:47:59,620 INFO L225 Difference]: With dead ends: 69 [2020-09-24 23:47:59,620 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 23:47:59,623 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 23:47:59,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 23:47:59,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-24 23:47:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 23:47:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-24 23:47:59,643 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-24 23:47:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 23:47:59,643 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-24 23:47:59,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 23:47:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-24 23:47:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 23:47:59,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 23:47:59,646 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 23:47:59,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 23:47:59,646 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 23:47:59,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 23:47:59,647 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-09-24 23:47:59,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 23:47:59,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097843212] [2020-09-24 23:47:59,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 23:47:59,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 23:47:59,667 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 23:47:59,668 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 23:47:59,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 23:47:59,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 11:47:59 BoogieIcfgContainer [2020-09-24 23:47:59,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 23:47:59,711 INFO L168 Benchmark]: Toolchain (without parser) took 3740.04 ms. Allocated memory was 141.6 MB in the beginning and 243.3 MB in the end (delta: 101.7 MB). Free memory was 104.3 MB in the beginning and 201.1 MB in the end (delta: -96.8 MB). Peak memory consumption was 4.9 MB. Max. memory is 7.1 GB. [2020-09-24 23:47:59,712 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.6 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 23:47:59,713 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.87 ms. Allocated memory is still 141.6 MB. Free memory was 103.7 MB in the beginning and 94.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 23:47:59,715 INFO L168 Benchmark]: Boogie Preprocessor took 107.67 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.2 MB in the beginning and 184.2 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-24 23:47:59,716 INFO L168 Benchmark]: RCFGBuilder took 314.86 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 170.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-09-24 23:47:59,723 INFO L168 Benchmark]: TraceAbstraction took 3011.85 ms. Allocated memory was 205.0 MB in the beginning and 243.3 MB in the end (delta: 38.3 MB). Free memory was 170.0 MB in the beginning and 201.1 MB in the end (delta: -31.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 7.1 GB. [2020-09-24 23:47:59,734 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 141.6 MB. Free memory was 123.0 MB in the beginning and 122.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 295.87 ms. Allocated memory is still 141.6 MB. Free memory was 103.7 MB in the beginning and 94.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.67 ms. Allocated memory was 141.6 MB in the beginning and 205.0 MB in the end (delta: 63.4 MB). Free memory was 94.2 MB in the beginning and 184.2 MB in the end (delta: -90.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 314.86 ms. Allocated memory is still 205.0 MB. Free memory was 183.8 MB in the beginning and 170.6 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3011.85 ms. Allocated memory was 205.0 MB in the beginning and 243.3 MB in the end (delta: 38.3 MB). Free memory was 170.0 MB in the beginning and 201.1 MB in the end (delta: -31.1 MB). Peak memory consumption was 7.1 MB. 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: 2.9s, 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, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s 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, 2.1s 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...