/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/recursive-simple/afterrec-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 19:15:31,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 19:15:32,000 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 19:15:32,063 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 19:15:32,064 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 19:15:32,068 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 19:15:32,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 19:15:32,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 19:15:32,081 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 19:15:32,089 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 19:15:32,094 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 19:15:32,095 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 19:15:32,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 19:15:32,097 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 19:15:32,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 19:15:32,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 19:15:32,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 19:15:32,129 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 19:15:32,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 19:15:32,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 19:15:32,150 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 19:15:32,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 19:15:32,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 19:15:32,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 19:15:32,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 19:15:32,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 19:15:32,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 19:15:32,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 19:15:32,180 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 19:15:32,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 19:15:32,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 19:15:32,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 19:15:32,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 19:15:32,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 19:15:32,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 19:15:32,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 19:15:32,188 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 19:15:32,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 19:15:32,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 19:15:32,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 19:15:32,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 19:15:32,243 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 19:15:32,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 19:15:32,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 19:15:32,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 19:15:32,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 19:15:32,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 19:15:32,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 19:15:32,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 19:15:32,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 19:15:32,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 19:15:32,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 19:15:32,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 19:15:32,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 19:15:32,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 19:15:32,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 19:15:32,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 19:15:32,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 19:15:32,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 19:15:32,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 19:15:32,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 19:15:32,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 19:15:32,249 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 19:15:32,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 19:15:32,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 19:15:32,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 19:15:32,685 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 19:15:32,686 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 19:15:32,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/afterrec-2.c [2021-01-06 19:15:32,781 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b5d7d444/4bb937284061460092016c70286e603b/FLAGff61e4c10 [2021-01-06 19:15:33,440 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 19:15:33,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec-2.c [2021-01-06 19:15:33,450 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b5d7d444/4bb937284061460092016c70286e603b/FLAGff61e4c10 [2021-01-06 19:15:33,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b5d7d444/4bb937284061460092016c70286e603b [2021-01-06 19:15:33,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 19:15:33,782 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 19:15:33,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 19:15:33,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 19:15:33,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 19:15:33,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:15:33" (1/1) ... [2021-01-06 19:15:33,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73926c38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:33, skipping insertion in model container [2021-01-06 19:15:33,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 07:15:33" (1/1) ... [2021-01-06 19:15:33,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 19:15:33,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 19:15:34,000 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec-2.c[318,331] [2021-01-06 19:15:34,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:15:34,018 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 19:15:34,034 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/recursive-simple/afterrec-2.c[318,331] [2021-01-06 19:15:34,035 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 19:15:34,053 INFO L208 MainTranslator]: Completed translation [2021-01-06 19:15:34,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34 WrapperNode [2021-01-06 19:15:34,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 19:15:34,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 19:15:34,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 19:15:34,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 19:15:34,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... [2021-01-06 19:15:34,074 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... [2021-01-06 19:15:34,094 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 19:15:34,095 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 19:15:34,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 19:15:34,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 19:15:34,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... [2021-01-06 19:15:34,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... [2021-01-06 19:15:34,108 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... [2021-01-06 19:15:34,109 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... [2021-01-06 19:15:34,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... [2021-01-06 19:15:34,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... [2021-01-06 19:15:34,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... [2021-01-06 19:15:34,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 19:15:34,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 19:15:34,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 19:15:34,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 19:15:34,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 19:15:34,300 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-01-06 19:15:34,301 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-01-06 19:15:34,302 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 19:15:34,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 19:15:34,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 19:15:34,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 19:15:34,614 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 19:15:34,614 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-01-06 19:15:34,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:15:34 BoogieIcfgContainer [2021-01-06 19:15:34,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 19:15:34,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 19:15:34,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 19:15:34,623 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 19:15:34,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 07:15:33" (1/3) ... [2021-01-06 19:15:34,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4582940f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:15:34, skipping insertion in model container [2021-01-06 19:15:34,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 07:15:34" (2/3) ... [2021-01-06 19:15:34,625 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4582940f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 07:15:34, skipping insertion in model container [2021-01-06 19:15:34,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:15:34" (3/3) ... [2021-01-06 19:15:34,627 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec-2.c [2021-01-06 19:15:34,634 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 19:15:34,640 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 19:15:34,663 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 19:15:34,700 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 19:15:34,703 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 19:15:34,703 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 19:15:34,704 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 19:15:34,704 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 19:15:34,704 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 19:15:34,704 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 19:15:34,704 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 19:15:34,746 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 19:15:34,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 19:15:34,758 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 19:15:34,759 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 19:15:34,759 INFO L429 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 19:15:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 19:15:34,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2027498805, now seen corresponding path program 1 times [2021-01-06 19:15:34,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 19:15:34,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405596038] [2021-01-06 19:15:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 19:15:34,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:35,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-01-06 19:15:35,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 19:15:35,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405596038] [2021-01-06 19:15:35,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302251279] [2021-01-06 19:15:35,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 19:15:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 19:15:35,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2021-01-06 19:15:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 19:15:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-01-06 19:15:35,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 19:15:35,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-01-06 19:15:35,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882270469] [2021-01-06 19:15:35,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 19:15:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 19:15:35,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 19:15:35,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-01-06 19:15:35,326 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 4 states. [2021-01-06 19:15:35,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 19:15:35,364 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-01-06 19:15:35,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 19:15:35,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-01-06 19:15:35,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 19:15:35,373 INFO L225 Difference]: With dead ends: 20 [2021-01-06 19:15:35,373 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 19:15:35,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 19:15:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 19:15:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 19:15:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 19:15:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 19:15:35,403 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-01-06 19:15:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 19:15:35,403 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 19:15:35,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 19:15:35,404 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 19:15:35,404 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 19:15:35,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-01-06 19:15:35,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-01-06 19:15:35,637 INFO L189 CegarLoopUtils]: For program point fErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2021-01-06 19:15:35,637 INFO L185 CegarLoopUtils]: At program point L8(line 8) the Hoare annotation is: (not (<= |f_#in~n| 2)) [2021-01-06 19:15:35,637 INFO L189 CegarLoopUtils]: For program point fEXIT(lines 5 10) no Hoare annotation was computed. [2021-01-06 19:15:35,637 INFO L189 CegarLoopUtils]: For program point L8-1(lines 5 10) no Hoare annotation was computed. [2021-01-06 19:15:35,638 INFO L189 CegarLoopUtils]: For program point L6(line 6) no Hoare annotation was computed. [2021-01-06 19:15:35,638 INFO L192 CegarLoopUtils]: At program point fENTRY(lines 5 10) the Hoare annotation is: true [2021-01-06 19:15:35,638 INFO L189 CegarLoopUtils]: For program point fFINAL(lines 5 10) no Hoare annotation was computed. [2021-01-06 19:15:35,638 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-01-06 19:15:35,638 INFO L189 CegarLoopUtils]: For program point L-1(line -1) no Hoare annotation was computed. [2021-01-06 19:15:35,638 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-01-06 19:15:35,639 INFO L192 CegarLoopUtils]: At program point L13(line 13) the Hoare annotation is: true [2021-01-06 19:15:35,639 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-01-06 19:15:35,639 INFO L189 CegarLoopUtils]: For program point L13-1(lines 12 14) no Hoare annotation was computed. [2021-01-06 19:15:35,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 07:15:35 BoogieIcfgContainer [2021-01-06 19:15:35,645 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 19:15:35,646 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 19:15:35,646 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 19:15:35,646 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 19:15:35,647 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 07:15:34" (3/4) ... [2021-01-06 19:15:35,651 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 19:15:35,658 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure f [2021-01-06 19:15:35,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-01-06 19:15:35,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-01-06 19:15:35,663 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:15:35,664 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 19:15:35,701 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/recursive-simple/afterrec-2.c-witness.graphml [2021-01-06 19:15:35,701 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 19:15:35,703 INFO L168 Benchmark]: Toolchain (without parser) took 1920.25 ms. Allocated memory is still 155.2 MB. Free memory was 136.7 MB in the beginning and 93.4 MB in the end (delta: 43.4 MB). Peak memory consumption was 42.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:35,704 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory was 128.0 MB in the beginning and 127.9 MB in the end (delta: 72.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 19:15:35,705 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.68 ms. Allocated memory is still 155.2 MB. Free memory was 136.5 MB in the beginning and 127.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:35,706 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.27 ms. Allocated memory is still 155.2 MB. Free memory was 127.6 MB in the beginning and 126.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:35,707 INFO L168 Benchmark]: Boogie Preprocessor took 21.68 ms. Allocated memory is still 155.2 MB. Free memory was 126.3 MB in the beginning and 125.5 MB in the end (delta: 778.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:35,708 INFO L168 Benchmark]: RCFGBuilder took 498.27 ms. Allocated memory is still 155.2 MB. Free memory was 125.5 MB in the beginning and 129.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:35,709 INFO L168 Benchmark]: TraceAbstraction took 1026.66 ms. Allocated memory is still 155.2 MB. Free memory was 128.7 MB in the beginning and 95.7 MB in the end (delta: 33.1 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:35,709 INFO L168 Benchmark]: Witness Printer took 55.18 ms. Allocated memory is still 155.2 MB. Free memory was 95.4 MB in the beginning and 93.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 19:15:35,715 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 155.2 MB. Free memory was 128.0 MB in the beginning and 127.9 MB in the end (delta: 72.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 269.68 ms. Allocated memory is still 155.2 MB. Free memory was 136.5 MB in the beginning and 127.8 MB in the end (delta: 8.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 39.27 ms. Allocated memory is still 155.2 MB. Free memory was 127.6 MB in the beginning and 126.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 21.68 ms. Allocated memory is still 155.2 MB. Free memory was 126.3 MB in the beginning and 125.5 MB in the end (delta: 778.9 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 498.27 ms. Allocated memory is still 155.2 MB. Free memory was 125.5 MB in the beginning and 129.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1026.66 ms. Allocated memory is still 155.2 MB. Free memory was 128.7 MB in the beginning and 95.7 MB in the end (delta: 33.1 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * Witness Printer took 55.18 ms. Allocated memory is still 155.2 MB. Free memory was 95.4 MB in the beginning and 93.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 1, TraceHistogramMax: 3, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 6 SDtfs, 5 SDslu, 9 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred 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, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 6 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 442 SizeOfPredicates, 1 NumberOfNonLiveVariables, 60 ConjunctsInSsa, 3 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 10/14 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...