/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=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --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/afterrec-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 19:18:39,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 19:18:39,659 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 19:18:39,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 19:18:39,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 19:18:39,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 19:18:39,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 19:18:39,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 19:18:39,721 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 19:18:39,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 19:18:39,725 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 19:18:39,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 19:18:39,726 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 19:18:39,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 19:18:39,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 19:18:39,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 19:18:39,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 19:18:39,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 19:18:39,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 19:18:39,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 19:18:39,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 19:18:39,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 19:18:39,751 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 19:18:39,752 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 19:18:39,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 19:18:39,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 19:18:39,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 19:18:39,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 19:18:39,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 19:18:39,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 19:18:39,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 19:18:39,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 19:18:39,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 19:18:39,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 19:18:39,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 19:18:39,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 19:18:39,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 19:18:39,782 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 19:18:39,782 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 19:18:39,783 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 19:18:39,785 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 19:18:39,785 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 19:18:39,827 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 19:18:39,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 19:18:39,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 19:18:39,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 19:18:39,829 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 19:18:39,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 19:18:39,829 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 19:18:39,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 19:18:39,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 19:18:39,830 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 19:18:39,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 19:18:39,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 19:18:39,830 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 19:18:39,830 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 19:18:39,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 19:18:39,831 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 19:18:39,831 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 19:18:39,831 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 19:18:39,831 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 19:18:39,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 19:18:39,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 19:18:39,832 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 19:18:39,832 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 19:18:39,832 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 19:18:39,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 19:18:39,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 19:18:39,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 19:18:39,833 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 19:18:39,833 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 19:18:39,834 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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-09-24 19:18:40,266 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 19:18:40,291 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 19:18:40,295 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 19:18:40,297 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 19:18:40,302 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 19:18:40,303 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-09-24 19:18:40,399 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c5c90f6/40c675fb4085411a847bd7f8fb6aaaa1/FLAG3db7333c6 [2020-09-24 19:18:40,948 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 19:18:40,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec-2.c [2020-09-24 19:18:40,958 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c5c90f6/40c675fb4085411a847bd7f8fb6aaaa1/FLAG3db7333c6 [2020-09-24 19:18:41,291 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64c5c90f6/40c675fb4085411a847bd7f8fb6aaaa1 [2020-09-24 19:18:41,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 19:18:41,310 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 19:18:41,311 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 19:18:41,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 19:18:41,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 19:18:41,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:18:41" (1/1) ... [2020-09-24 19:18:41,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2869c26e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41, skipping insertion in model container [2020-09-24 19:18:41,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 07:18:41" (1/1) ... [2020-09-24 19:18:41,333 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 19:18:41,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 19:18:41,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:18:41,561 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 19:18:41,576 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 19:18:41,593 INFO L208 MainTranslator]: Completed translation [2020-09-24 19:18:41,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41 WrapperNode [2020-09-24 19:18:41,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 19:18:41,595 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 19:18:41,595 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 19:18:41,595 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 19:18:41,610 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ... [2020-09-24 19:18:41,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ... [2020-09-24 19:18:41,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ... [2020-09-24 19:18:41,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ... [2020-09-24 19:18:41,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ... [2020-09-24 19:18:41,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ... [2020-09-24 19:18:41,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (1/1) ... [2020-09-24 19:18:41,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 19:18:41,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 19:18:41,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 19:18:41,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 19:18:41,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (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 19:18:41,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 19:18:41,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 19:18:41,800 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-24 19:18:41,801 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 19:18:41,801 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 19:18:41,801 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-24 19:18:41,801 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 19:18:41,801 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 19:18:41,802 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 19:18:41,964 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 19:18:41,965 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 19:18:41,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:18:41 BoogieIcfgContainer [2020-09-24 19:18:41,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 19:18:41,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 19:18:41,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 19:18:41,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 19:18:41,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 07:18:41" (1/3) ... [2020-09-24 19:18:41,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c4e330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:18:41, skipping insertion in model container [2020-09-24 19:18:41,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 07:18:41" (2/3) ... [2020-09-24 19:18:41,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11c4e330 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 07:18:41, skipping insertion in model container [2020-09-24 19:18:41,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 07:18:41" (3/3) ... [2020-09-24 19:18:41,979 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2020-09-24 19:18:41,989 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 19:18:41,997 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 19:18:42,017 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 19:18:42,053 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 19:18:42,053 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 19:18:42,053 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 19:18:42,053 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 19:18:42,053 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 19:18:42,054 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 19:18:42,054 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 19:18:42,054 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 19:18:42,075 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-24 19:18:42,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 19:18:42,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 19:18:42,083 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 19:18:42,083 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 19:18:42,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 19:18:42,090 INFO L82 PathProgramCache]: Analyzing trace with hash -611063963, now seen corresponding path program 1 times [2020-09-24 19:18:42,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 19:18:42,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669958320] [2020-09-24 19:18:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 19:18:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:42,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:42,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:42,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 19:18:42,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:42,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-09-24 19:18:42,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:42,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 19:18:42,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 19:18:42,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 19:18:42,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 19:18:42,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 19:18:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:42,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:42,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:42,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 19:18:42,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:42,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 19:18:42,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:42,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 19:18:42,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:42,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 19:18:42,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 19:18:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 19:18:42,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 19:18:42,411 FATAL L256 erpolLogProxyWrapper]: Timeout: 1000 [2020-09-24 19:18:42,411 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 19:18:42,411 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 19:18:42,412 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 19:18:42,412 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLEST [2020-09-24 19:18:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 19:18:42,412 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-24 19:18:42,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 19:18:42,413 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 19:18:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 19:18:42,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669958320] [2020-09-24 19:18:42,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 19:18:42,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 19:18:42,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274595711] [2020-09-24 19:18:42,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 19:18:42,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 19:18:42,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 19:18:42,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 19:18:42,477 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 4 states. [2020-09-24 19:18:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 19:18:42,559 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-09-24 19:18:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 19:18:42,562 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-24 19:18:42,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 19:18:42,571 INFO L225 Difference]: With dead ends: 27 [2020-09-24 19:18:42,572 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 19:18:42,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 19:18:42,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 19:18:42,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 19:18:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 19:18:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 19:18:42,629 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-09-24 19:18:42,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 19:18:42,629 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 19:18:42,630 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 19:18:42,630 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 19:18:42,630 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 19:18:42,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 19:18:42,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 19:18:42,671 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 19:18:42,671 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 19:18:42,672 INFO L268 CegarLoopResult]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2020-09-24 19:18:42,672 INFO L268 CegarLoopResult]: For program point fFINAL(lines 3 8) no Hoare annotation was computed. [2020-09-24 19:18:42,672 INFO L268 CegarLoopResult]: For program point fEXIT(lines 3 8) no Hoare annotation was computed. [2020-09-24 19:18:42,672 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2020-09-24 19:18:42,673 INFO L271 CegarLoopResult]: At program point fENTRY(lines 3 8) the Hoare annotation is: true [2020-09-24 19:18:42,673 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-09-24 19:18:42,673 INFO L268 CegarLoopResult]: For program point L6-1(lines 3 8) no Hoare annotation was computed. [2020-09-24 19:18:42,673 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 19:18:42,674 INFO L268 CegarLoopResult]: For program point L5-1(line 5) no Hoare annotation was computed. [2020-09-24 19:18:42,674 INFO L268 CegarLoopResult]: For program point L5-2(line 5) no Hoare annotation was computed. [2020-09-24 19:18:42,674 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 19:18:42,674 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 19:18:42,674 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 19:18:42,675 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 19:18:42,675 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 10 12) the Hoare annotation is: true [2020-09-24 19:18:42,675 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 10 12) no Hoare annotation was computed. [2020-09-24 19:18:42,675 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 10 12) no Hoare annotation was computed. [2020-09-24 19:18:42,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 07:18:42 BoogieIcfgContainer [2020-09-24 19:18:42,684 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 19:18:42,688 INFO L168 Benchmark]: Toolchain (without parser) took 1379.13 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 103.0 MB in the beginning and 140.1 MB in the end (delta: -37.1 MB). Peak memory consumption was 21.1 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:42,689 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 145.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 19:18:42,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 283.24 ms. Allocated memory is still 145.8 MB. Free memory was 102.4 MB in the beginning and 93.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:42,691 INFO L168 Benchmark]: Boogie Preprocessor took 129.61 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 93.5 MB in the beginning and 183.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:42,692 INFO L168 Benchmark]: RCFGBuilder took 245.15 ms. Allocated memory is still 203.9 MB. Free memory was 183.0 MB in the beginning and 172.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:42,693 INFO L168 Benchmark]: TraceAbstraction took 713.07 ms. Allocated memory is still 203.9 MB. Free memory was 171.7 MB in the beginning and 140.1 MB in the end (delta: 31.6 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. [2020-09-24 19:18:42,698 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 145.8 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 283.24 ms. Allocated memory is still 145.8 MB. Free memory was 102.4 MB in the beginning and 93.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 129.61 ms. Allocated memory was 145.8 MB in the beginning and 203.9 MB in the end (delta: 58.2 MB). Free memory was 93.5 MB in the beginning and 183.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 245.15 ms. Allocated memory is still 203.9 MB. Free memory was 183.0 MB in the beginning and 172.3 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 713.07 ms. Allocated memory is still 203.9 MB. Free memory was 171.7 MB in the beginning and 140.1 MB in the end (delta: 31.6 MB). Peak memory consumption was 31.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 5 SDslu, 15 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 8 PreInvPairs, 8 NumberOfFragments, 9 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 285 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 0 PerfectInterpolantSequences, 0/2 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 correct! Received shutdown request...