/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:05:54,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:05:54,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:05:55,034 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:05:55,034 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:05:55,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:05:55,046 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:05:55,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:05:55,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:05:55,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:05:55,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:05:55,060 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:05:55,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:05:55,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:05:55,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:05:55,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:05:55,071 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:05:55,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:05:55,074 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:05:55,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:05:55,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:05:55,079 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:05:55,080 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:05:55,081 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:05:55,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:05:55,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:05:55,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:05:55,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:05:55,096 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 [2020-09-04 13:05:55,121 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:05:55,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:05:55,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:05:55,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:05:55,123 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:05:55,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:05:55,124 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:05:55,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:05:55,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:05:55,124 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:05:55,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:05:55,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:05:55,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:05:55,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:05:55,125 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:05:55,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:05:55,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:05:55,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:05:55,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:05:55,126 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:05:55,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:05:55,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:05:55,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:05:55,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:05:55,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:05:55,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:05:55,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:05:55,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:05:55,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:05:55,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:05:55,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:05:55,630 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:05:55,636 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:05:55,638 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:05:55,638 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:05:55,640 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c [2020-09-04 13:05:55,728 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b80613988/c6e40b3c60684e4da9655c6abe960ef3/FLAGcb59d2002 [2020-09-04 13:05:56,270 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:05:56,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c [2020-09-04 13:05:56,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b80613988/c6e40b3c60684e4da9655c6abe960ef3/FLAGcb59d2002 [2020-09-04 13:05:56,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b80613988/c6e40b3c60684e4da9655c6abe960ef3 [2020-09-04 13:05:56,614 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:05:56,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:05:56,620 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:05:56,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:05:56,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:05:56,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:05:56" (1/1) ... [2020-09-04 13:05:56,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6f757b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56, skipping insertion in model container [2020-09-04 13:05:56,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:05:56" (1/1) ... [2020-09-04 13:05:56,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:05:56,665 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:05:56,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:05:56,879 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:05:56,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:05:56,916 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:05:56,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56 WrapperNode [2020-09-04 13:05:56,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:05:56,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:05:56,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:05:56,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:05:56,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56" (1/1) ... [2020-09-04 13:05:56,937 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56" (1/1) ... [2020-09-04 13:05:56,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56" (1/1) ... [2020-09-04 13:05:56,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56" (1/1) ... [2020-09-04 13:05:56,947 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56" (1/1) ... [2020-09-04 13:05:56,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56" (1/1) ... [2020-09-04 13:05:56,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56" (1/1) ... [2020-09-04 13:05:56,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:05:56,952 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:05:56,952 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:05:56,952 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:05:56,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56" (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 [2020-09-04 13:05:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:05:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:05:57,114 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-09-04 13:05:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2020-09-04 13:05:57,115 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:05:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:05:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-09-04 13:05:57,115 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2020-09-04 13:05:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:05:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:05:57,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:05:57,328 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:05:57,328 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 13:05:57,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:05:57 BoogieIcfgContainer [2020-09-04 13:05:57,333 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:05:57,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:05:57,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:05:57,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:05:57,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:05:56" (1/3) ... [2020-09-04 13:05:57,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f93a0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:05:57, skipping insertion in model container [2020-09-04 13:05:57,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:05:56" (2/3) ... [2020-09-04 13:05:57,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f93a0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:05:57, skipping insertion in model container [2020-09-04 13:05:57,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:05:57" (3/3) ... [2020-09-04 13:05:57,342 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2020-09-04 13:05:57,352 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:05:57,362 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-09-04 13:05:57,384 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-09-04 13:05:57,412 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:05:57,413 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:05:57,413 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:05:57,413 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:05:57,413 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:05:57,414 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:05:57,414 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:05:57,414 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:05:57,432 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-04 13:05:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-04 13:05:57,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:57,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:05:57,441 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:57,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1662209305, now seen corresponding path program 1 times [2020-09-04 13:05:57,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:57,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638613868] [2020-09-04 13:05:57,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:57,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:57,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:05:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:57,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 13:05:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:05:57,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:05:57,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638613868] [2020-09-04 13:05:57,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:05:57,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 13:05:57,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507128805] [2020-09-04 13:05:57,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:05:57,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:05:57,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:05:57,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:05:57,836 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 7 states. [2020-09-04 13:05:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:05:57,996 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-09-04 13:05:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:05:57,998 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-09-04 13:05:57,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:05:58,010 INFO L225 Difference]: With dead ends: 34 [2020-09-04 13:05:58,010 INFO L226 Difference]: Without dead ends: 22 [2020-09-04 13:05:58,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 13:05:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-04 13:05:58,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-04 13:05:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-04 13:05:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-04 13:05:58,063 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2020-09-04 13:05:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:05:58,063 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-04 13:05:58,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:05:58,064 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-04 13:05:58,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 13:05:58,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:05:58,065 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:05:58,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:05:58,066 INFO L427 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:05:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:05:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1078403623, now seen corresponding path program 1 times [2020-09-04 13:05:58,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:05:58,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691927978] [2020-09-04 13:05:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:05:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:05:58,080 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:05:58,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:05:58,091 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:05:58,115 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:05:58,115 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:05:58,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 13:05:58,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:05:58 BoogieIcfgContainer [2020-09-04 13:05:58,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:05:58,151 INFO L168 Benchmark]: Toolchain (without parser) took 1533.92 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 104.2 MB in the beginning and 136.3 MB in the end (delta: -32.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:58,151 INFO L168 Benchmark]: CDTParser took 1.44 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 13:05:58,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.98 ms. Allocated memory is still 147.8 MB. Free memory was 104.0 MB in the beginning and 95.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:58,153 INFO L168 Benchmark]: Boogie Preprocessor took 34.21 ms. Allocated memory is still 147.8 MB. Free memory was 95.0 MB in the beginning and 93.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:58,155 INFO L168 Benchmark]: RCFGBuilder took 380.94 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.5 MB in the beginning and 171.5 MB in the end (delta: -77.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:58,156 INFO L168 Benchmark]: TraceAbstraction took 813.53 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 136.3 MB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:05:58,159 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.44 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 296.98 ms. Allocated memory is still 147.8 MB. Free memory was 104.0 MB in the beginning and 95.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.21 ms. Allocated memory is still 147.8 MB. Free memory was 95.0 MB in the beginning and 93.7 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 380.94 ms. Allocated memory was 147.8 MB in the beginning and 203.9 MB in the end (delta: 56.1 MB). Free memory was 93.5 MB in the beginning and 171.5 MB in the end (delta: -77.9 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 813.53 ms. Allocated memory is still 203.9 MB. Free memory was 170.8 MB in the beginning and 136.3 MB in the end (delta: 34.5 MB). Peak memory consumption was 34.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L21] CALL f(4) VAL [\old(n)=4] [L7] COND FALSE !(n<3) [L8] n-- VAL [\old(n)=4, n=3] [L9] CALL f2(n) VAL [\old(n)=3] [L14] COND FALSE !(n<3) [L15] n-- VAL [\old(n)=3, n=2] [L16] CALL f(n) VAL [\old(n)=2] [L7] COND TRUE n<3 VAL [\old(n)=2, n=2] [L16] RET f(n) VAL [\old(n)=3, n=2] [L17] __VERIFIER_error() VAL [\old(n)=3, n=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 3 SDslu, 48 SDs, 0 SdLazy, 28 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 288 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...