/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 01:26:52,787 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-07-20 01:26:52,840 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 01:26:52,843 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 01:26:52,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 01:26:52,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 01:26:52,852 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 01:26:52,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 01:26:52,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 01:26:52,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 01:26:52,862 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 01:26:52,863 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 01:26:52,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 01:26:52,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 01:26:52,870 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 01:26:52,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 01:26:52,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 01:26:52,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 01:26:52,887 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 [2020-07-20 01:26:52,911 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 01:26:52,912 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 01:26:52,914 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 01:26:52,915 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 01:26:52,915 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 01:26:52,915 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 01:26:52,915 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 01:26:52,916 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 01:26:52,916 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 01:26:52,916 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 01:26:52,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 01:26:52,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 01:26:52,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 01:26:52,918 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 01:26:52,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 01:26:52,919 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 01:26:52,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 01:26:52,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 01:26:52,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 01:26:52,920 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 01:26:52,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 01:26:52,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 01:26:52,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 01:26:52,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 01:26:52,921 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 01:26:52,921 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 01:26:52,921 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 01:26:52,921 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 01:26:52,921 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 01:26:52,922 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 01:26:53,230 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 01:26:53,249 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 01:26:53,253 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 01:26:53,255 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 01:26:53,255 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 01:26:53,256 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-07-20 01:26:53,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfa1593f3/70ae0edcbcef41fa8b3f850f876d2d3a/FLAGc7b903136 [2020-07-20 01:26:53,818 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 01:26:53,819 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-1.c [2020-07-20 01:26:53,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfa1593f3/70ae0edcbcef41fa8b3f850f876d2d3a/FLAGc7b903136 [2020-07-20 01:26:54,194 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bfa1593f3/70ae0edcbcef41fa8b3f850f876d2d3a [2020-07-20 01:26:54,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 01:26:54,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 01:26:54,207 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 01:26:54,207 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 01:26:54,211 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 01:26:54,212 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:26:54" (1/1) ... [2020-07-20 01:26:54,216 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16f72c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54, skipping insertion in model container [2020-07-20 01:26:54,216 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:26:54" (1/1) ... [2020-07-20 01:26:54,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 01:26:54,244 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 01:26:54,410 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:26:54,414 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 01:26:54,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 01:26:54,444 INFO L208 MainTranslator]: Completed translation [2020-07-20 01:26:54,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54 WrapperNode [2020-07-20 01:26:54,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 01:26:54,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 01:26:54,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 01:26:54,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 01:26:54,457 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54" (1/1) ... [2020-07-20 01:26:54,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54" (1/1) ... [2020-07-20 01:26:54,463 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54" (1/1) ... [2020-07-20 01:26:54,463 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54" (1/1) ... [2020-07-20 01:26:54,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54" (1/1) ... [2020-07-20 01:26:54,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54" (1/1) ... [2020-07-20 01:26:54,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54" (1/1) ... [2020-07-20 01:26:54,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 01:26:54,471 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 01:26:54,471 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 01:26:54,471 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 01:26:54,472 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54" (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 [2020-07-20 01:26:54,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 01:26:54,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 01:26:54,625 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-20 01:26:54,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 01:26:54,625 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 01:26:54,625 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-20 01:26:54,625 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 01:26:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 01:26:54,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 01:26:54,785 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 01:26:54,785 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 01:26:54,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:26:54 BoogieIcfgContainer [2020-07-20 01:26:54,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 01:26:54,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 01:26:54,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 01:26:54,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 01:26:54,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:26:54" (1/3) ... [2020-07-20 01:26:54,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a48771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:26:54, skipping insertion in model container [2020-07-20 01:26:54,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:26:54" (2/3) ... [2020-07-20 01:26:54,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a48771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:26:54, skipping insertion in model container [2020-07-20 01:26:54,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:26:54" (3/3) ... [2020-07-20 01:26:54,799 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-1.c [2020-07-20 01:26:54,812 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 01:26:54,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 01:26:54,836 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 01:26:54,865 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 01:26:54,866 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 01:26:54,866 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 01:26:54,866 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 01:26:54,866 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 01:26:54,867 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 01:26:54,867 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 01:26:54,867 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 01:26:54,895 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 01:26:54,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 01:26:54,905 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:54,906 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:54,907 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:54,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-20 01:26:54,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:54,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673058772] [2020-07-20 01:26:54,934 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@efa6ef6 [2020-07-20 01:26:55,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:55,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 01:26:55,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673058772] [2020-07-20 01:26:55,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 01:26:55,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 01:26:55,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842675897] [2020-07-20 01:26:55,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 01:26:55,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:55,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 01:26:55,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 01:26:55,254 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 01:26:55,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:55,345 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 01:26:55,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 01:26:55,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 01:26:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:55,359 INFO L225 Difference]: With dead ends: 30 [2020-07-20 01:26:55,360 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 01:26:55,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 01:26:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 01:26:55,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 01:26:55,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 01:26:55,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 01:26:55,411 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 01:26:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:55,412 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 01:26:55,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 01:26:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 01:26:55,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 01:26:55,415 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:55,415 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:55,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 01:26:55,416 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:55,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:55,416 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-20 01:26:55,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:55,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471503703] [2020-07-20 01:26:55,417 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@efa6ef6 [2020-07-20 01:26:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:55,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 01:26:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:26:55,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471503703] [2020-07-20 01:26:55,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311782984] [2020-07-20 01:26:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e743ba7 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 01:26:55,657 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5e743ba7 issued 2 check-sat command(s) [2020-07-20 01:26:55,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 01:26:55,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 01:26:55,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 01:26:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 01:26:55,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 01:26:55,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-20 01:26:55,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816849809] [2020-07-20 01:26:55,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-20 01:26:55,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 01:26:55,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-20 01:26:55,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-20 01:26:55,731 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-20 01:26:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 01:26:55,798 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 01:26:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 01:26:55,799 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-20 01:26:55,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 01:26:55,801 INFO L225 Difference]: With dead ends: 25 [2020-07-20 01:26:55,801 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 01:26:55,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-20 01:26:55,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 01:26:55,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 01:26:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 01:26:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 01:26:55,810 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 01:26:55,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 01:26:55,810 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 01:26:55,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-20 01:26:55,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 01:26:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 01:26:55,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 01:26:55,812 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 01:26:56,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 01:26:56,028 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 01:26:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 01:26:56,029 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-20 01:26:56,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 01:26:56,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542901281] [2020-07-20 01:26:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@efa6ef6 [2020-07-20 01:26:56,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:26:56,052 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:26:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 01:26:56,071 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 01:26:56,088 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 01:26:56,088 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 01:26:56,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-20 01:26:56,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:26:56 BoogieIcfgContainer [2020-07-20 01:26:56,115 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 01:26:56,118 INFO L168 Benchmark]: Toolchain (without parser) took 1912.96 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 102.3 MB in the beginning and 116.3 MB in the end (delta: -14.0 MB). Peak memory consumption was 47.9 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:56,119 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 01:26:56,120 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.30 ms. Allocated memory is still 141.0 MB. Free memory was 101.8 MB in the beginning and 92.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:56,121 INFO L168 Benchmark]: Boogie Preprocessor took 24.65 ms. Allocated memory is still 141.0 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:56,122 INFO L168 Benchmark]: RCFGBuilder took 318.98 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 91.3 MB in the beginning and 171.5 MB in the end (delta: -80.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:56,123 INFO L168 Benchmark]: TraceAbstraction took 1324.07 ms. Allocated memory is still 202.9 MB. Free memory was 170.9 MB in the beginning and 116.3 MB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 7.1 GB. [2020-07-20 01:26:56,127 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 141.0 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.30 ms. Allocated memory is still 141.0 MB. Free memory was 101.8 MB in the beginning and 92.7 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.65 ms. Allocated memory is still 141.0 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 318.98 ms. Allocated memory was 141.0 MB in the beginning and 202.9 MB in the end (delta: 61.9 MB). Free memory was 91.3 MB in the beginning and 171.5 MB in the end (delta: -80.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1324.07 ms. Allocated memory is still 202.9 MB. Free memory was 170.9 MB in the beginning and 116.3 MB in the end (delta: 54.6 MB). Peak memory consumption was 54.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 2; [L13] int b = 3; VAL [a=2, b=3] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=3, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=2, m=3, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=1, m=4, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=5, \old(n)=0, \result=5, m=5, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=1, m=4, n=1, sum(n - 1, m + 1)=5] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=2, m=3, n=2, sum(n - 1, m + 1)=5] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=2, b=3, sum(a, b)=5] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=2, b=3, result=5] [L16] __VERIFIER_error() VAL [a=2, b=3, result=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 27 SDtfs, 19 SDslu, 65 SDs, 0 SdLazy, 48 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=2, 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 76 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 1536 SizeOfPredicates, 3 NumberOfNonLiveVariables, 40 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 4/8 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...