/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 0.1.25-72570d3 [2020-08-22 16:19:54,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 16:19:54,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 16:19:54,834 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 16:19:54,835 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 16:19:54,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 16:19:54,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 16:19:54,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 16:19:54,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 16:19:54,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 16:19:54,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 16:19:54,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 16:19:54,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 16:19:54,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 16:19:54,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 16:19:54,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 16:19:54,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 16:19:54,869 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 16:19:54,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 16:19:54,878 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 16:19:54,880 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 16:19:54,882 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 16:19:54,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 16:19:54,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 16:19:54,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 16:19:54,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 16:19:54,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 16:19:54,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 16:19:54,902 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 16:19:54,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 16:19:54,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 16:19:54,947 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 16:19:54,948 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 16:19:54,948 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 16:19:54,948 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 16:19:54,948 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 16:19:54,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 16:19:54,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 16:19:54,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 16:19:54,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 16:19:54,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 16:19:54,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 16:19:54,951 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 16:19:54,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 16:19:54,952 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 16:19:54,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 16:19:54,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 16:19:54,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 16:19:54,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 16:19:54,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 16:19:54,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 16:19:54,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 16:19:54,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 16:19:54,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 16:19:54,954 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 16:19:54,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 16:19:54,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 16:19:54,954 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 16:19:54,954 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-08-22 16:19:55,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 16:19:55,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 16:19:55,301 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 16:19:55,303 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 16:19:55,303 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 16:19:55,304 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c [2020-08-22 16:19:55,380 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5384643/08f71cdf35dd40e78beec4b506b2bf53/FLAG1e8835a16 [2020-08-22 16:19:55,826 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 16:19:55,827 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c [2020-08-22 16:19:55,833 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5384643/08f71cdf35dd40e78beec4b506b2bf53/FLAG1e8835a16 [2020-08-22 16:19:56,220 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a5384643/08f71cdf35dd40e78beec4b506b2bf53 [2020-08-22 16:19:56,230 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 16:19:56,232 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 16:19:56,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 16:19:56,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 16:19:56,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 16:19:56,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:19:56" (1/1) ... [2020-08-22 16:19:56,245 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3a776c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56, skipping insertion in model container [2020-08-22 16:19:56,245 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:19:56" (1/1) ... [2020-08-22 16:19:56,254 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 16:19:56,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 16:19:56,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:19:56,424 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 16:19:56,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 16:19:56,454 INFO L208 MainTranslator]: Completed translation [2020-08-22 16:19:56,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56 WrapperNode [2020-08-22 16:19:56,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 16:19:56,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 16:19:56,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 16:19:56,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 16:19:56,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56" (1/1) ... [2020-08-22 16:19:56,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56" (1/1) ... [2020-08-22 16:19:56,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56" (1/1) ... [2020-08-22 16:19:56,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56" (1/1) ... [2020-08-22 16:19:56,563 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56" (1/1) ... [2020-08-22 16:19:56,566 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56" (1/1) ... [2020-08-22 16:19:56,566 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56" (1/1) ... [2020-08-22 16:19:56,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 16:19:56,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 16:19:56,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 16:19:56,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 16:19:56,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-08-22 16:19:56,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 16:19:56,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 16:19:56,638 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2020-08-22 16:19:56,638 INFO L138 BoogieDeclarations]: Found implementation of procedure f2 [2020-08-22 16:19:56,638 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 16:19:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 16:19:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-08-22 16:19:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure f2 [2020-08-22 16:19:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 16:19:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 16:19:56,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 16:19:56,811 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 16:19:56,811 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 16:19:56,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:19:56 BoogieIcfgContainer [2020-08-22 16:19:56,818 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 16:19:56,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 16:19:56,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 16:19:56,822 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 16:19:56,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:19:56" (1/3) ... [2020-08-22 16:19:56,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ad34e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:19:56, skipping insertion in model container [2020-08-22 16:19:56,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:19:56" (2/3) ... [2020-08-22 16:19:56,823 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12ad34e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:19:56, skipping insertion in model container [2020-08-22 16:19:56,823 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:19:56" (3/3) ... [2020-08-22 16:19:56,824 INFO L109 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c [2020-08-22 16:19:56,832 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-08-22 16:19:56,838 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-08-22 16:19:56,852 INFO L251 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-08-22 16:19:56,877 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 16:19:56,877 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 16:19:56,877 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-08-22 16:19:56,878 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 16:19:56,878 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 16:19:56,878 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 16:19:56,878 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 16:19:56,878 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 16:19:56,896 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-08-22 16:19:56,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 16:19:56,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:56,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:56,903 INFO L427 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:56,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1662209305, now seen corresponding path program 1 times [2020-08-22 16:19:56,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:56,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184083780] [2020-08-22 16:19:56,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:56,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:57,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 16:19:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:57,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-22 16:19:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 16:19:57,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 16:19:57,238 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184083780] [2020-08-22 16:19:57,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 16:19:57,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 16:19:57,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219863539] [2020-08-22 16:19:57,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 16:19:57,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-08-22 16:19:57,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 16:19:57,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 16:19:57,264 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 7 states. [2020-08-22 16:19:57,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 16:19:57,381 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-08-22 16:19:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 16:19:57,384 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2020-08-22 16:19:57,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 16:19:57,394 INFO L225 Difference]: With dead ends: 34 [2020-08-22 16:19:57,394 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 16:19:57,399 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 [2020-08-22 16:19:57,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 16:19:57,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 16:19:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 16:19:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-08-22 16:19:57,445 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2020-08-22 16:19:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 16:19:57,445 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-08-22 16:19:57,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 16:19:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-08-22 16:19:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 16:19:57,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 16:19:57,447 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 16:19:57,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 16:19:57,448 INFO L427 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 16:19:57,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 16:19:57,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1078403623, now seen corresponding path program 1 times [2020-08-22 16:19:57,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-08-22 16:19:57,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740821624] [2020-08-22 16:19:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 16:19:57,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:19:57,463 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:19:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 16:19:57,473 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 16:19:57,492 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-08-22 16:19:57,492 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 16:19:57,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 16:19:57,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:19:57 BoogieIcfgContainer [2020-08-22 16:19:57,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 16:19:57,521 INFO L168 Benchmark]: Toolchain (without parser) took 1288.21 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 101.4 MB in the beginning and 135.4 MB in the end (delta: -34.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB. [2020-08-22 16:19:57,523 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 16:19:57,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 219.38 ms. Allocated memory is still 140.0 MB. Free memory was 101.0 MB in the beginning and 92.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2020-08-22 16:19:57,525 INFO L168 Benchmark]: Boogie Preprocessor took 112.37 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 182.6 MB in the end (delta: -90.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 16:19:57,526 INFO L168 Benchmark]: RCFGBuilder took 249.37 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. [2020-08-22 16:19:57,527 INFO L168 Benchmark]: TraceAbstraction took 699.61 ms. Allocated memory is still 203.4 MB. Free memory was 170.6 MB in the beginning and 135.4 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 MB. Max. memory is 7.1 GB. [2020-08-22 16:19:57,531 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 219.38 ms. Allocated memory is still 140.0 MB. Free memory was 101.0 MB in the beginning and 92.1 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.37 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.1 MB in the beginning and 182.6 MB in the end (delta: -90.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 249.37 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.6 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 699.61 ms. Allocated memory is still 203.4 MB. Free memory was 170.6 MB in the beginning and 135.4 MB in the end (delta: 35.2 MB). Peak memory consumption was 35.2 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: 0.6s, 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...