/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/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:12:16,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:12:16,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:12:16,425 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:12:16,425 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:12:16,427 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:12:16,429 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:12:16,438 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:12:16,440 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:12:16,441 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:12:16,442 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:12:16,443 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:12:16,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:12:16,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:12:16,448 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:12:16,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:12:16,451 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:12:16,452 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:12:16,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:12:16,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:12:16,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:12:16,463 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:12:16,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:12:16,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:12:16,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:12:16,479 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:12:16,480 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:12:16,481 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:12:16,482 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 [2020-07-07 11:12:16,496 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:12:16,496 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:12:16,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:12:16,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:12:16,498 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:12:16,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:12:16,498 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:12:16,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:12:16,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:12:16,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:12:16,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:12:16,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:12:16,499 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:12:16,499 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:12:16,499 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:12:16,500 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:12:16,500 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:12:16,500 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:12:16,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:12:16,500 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:12:16,501 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:12:16,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:12:16,501 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:12:16,501 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:12:16,501 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:12:16,502 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:12:16,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:12:16,502 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:12:16,502 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:12:16,502 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:12:16,781 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:12:16,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:12:16,797 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:12:16,798 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:12:16,799 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:12:16,799 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-07-07 11:12:16,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d6c9476/27dbfd48e85348c4920f068f2d360a7c/FLAG963312e47 [2020-07-07 11:12:17,321 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:12:17,323 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-07-07 11:12:17,329 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d6c9476/27dbfd48e85348c4920f068f2d360a7c/FLAG963312e47 [2020-07-07 11:12:17,703 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d6c9476/27dbfd48e85348c4920f068f2d360a7c [2020-07-07 11:12:17,713 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:12:17,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:12:17,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:17,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:12:17,720 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:12:17,721 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:17" (1/1) ... [2020-07-07 11:12:17,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fccddc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17, skipping insertion in model container [2020-07-07 11:12:17,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:17" (1/1) ... [2020-07-07 11:12:17,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:12:17,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:12:17,891 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:17,895 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:12:17,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:17,919 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:12:17,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17 WrapperNode [2020-07-07 11:12:17,920 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:17,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:12:17,921 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:12:17,921 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:12:17,930 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17" (1/1) ... [2020-07-07 11:12:17,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17" (1/1) ... [2020-07-07 11:12:18,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17" (1/1) ... [2020-07-07 11:12:18,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17" (1/1) ... [2020-07-07 11:12:18,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17" (1/1) ... [2020-07-07 11:12:18,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17" (1/1) ... [2020-07-07 11:12:18,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17" (1/1) ... [2020-07-07 11:12:18,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:12:18,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:12:18,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:12:18,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:12:18,029 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17" (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 [2020-07-07 11:12:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:12:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:12:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 11:12:18,090 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:12:18,090 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:12:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:12:18,091 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 11:12:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:12:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:12:18,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:12:18,257 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:12:18,257 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:12:18,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:18 BoogieIcfgContainer [2020-07-07 11:12:18,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:12:18,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:12:18,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:12:18,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:12:18,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:12:17" (1/3) ... [2020-07-07 11:12:18,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290483ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:18, skipping insertion in model container [2020-07-07 11:12:18,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:17" (2/3) ... [2020-07-07 11:12:18,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290483ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:18, skipping insertion in model container [2020-07-07 11:12:18,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:18" (3/3) ... [2020-07-07 11:12:18,268 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-07-07 11:12:18,278 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:12:18,285 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:12:18,299 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:12:18,321 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:12:18,322 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:12:18,322 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:12:18,322 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:12:18,322 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:12:18,322 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:12:18,323 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:12:18,323 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:12:18,340 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-07-07 11:12:18,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:12:18,347 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:18,348 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:18,349 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:18,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:18,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-07-07 11:12:18,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:18,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686921429] [2020-07-07 11:12:18,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:12:18,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686921429] [2020-07-07 11:12:18,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:18,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:12:18,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792983264] [2020-07-07 11:12:18,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:12:18,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:18,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:12:18,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:18,578 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-07-07 11:12:18,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:18,662 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-07-07 11:12:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:12:18,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:12:18,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:18,677 INFO L225 Difference]: With dead ends: 33 [2020-07-07 11:12:18,678 INFO L226 Difference]: Without dead ends: 19 [2020-07-07 11:12:18,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:18,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-07-07 11:12:18,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-07-07 11:12:18,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-07-07 11:12:18,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-07-07 11:12:18,728 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-07-07 11:12:18,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:18,729 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-07-07 11:12:18,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:12:18,729 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-07-07 11:12:18,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:12:18,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:18,731 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:18,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:12:18,732 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:18,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:18,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-07-07 11:12:18,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:18,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688081516] [2020-07-07 11:12:18,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:18,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:18,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688081516] [2020-07-07 11:12:18,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:18,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 11:12:18,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13657267] [2020-07-07 11:12:18,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:12:18,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:18,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:12:18,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:12:18,974 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 7 states. [2020-07-07 11:12:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:19,010 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2020-07-07 11:12:19,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:12:19,011 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-07-07 11:12:19,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:19,013 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:12:19,013 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:12:19,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:12:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:12:19,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-07-07 11:12:19,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:12:19,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-07 11:12:19,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 20 [2020-07-07 11:12:19,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:19,030 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-07 11:12:19,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:12:19,030 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-07 11:12:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-07 11:12:19,031 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:19,032 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:19,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 11:12:19,032 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:19,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:19,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-07-07 11:12:19,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:19,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125761942] [2020-07-07 11:12:19,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:19,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:19,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125761942] [2020-07-07 11:12:19,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593969436] [2020-07-07 11:12:19,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-07 11:12:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,296 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:12:19,302 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:19,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:19,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-07 11:12:19,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280414227] [2020-07-07 11:12:19,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:12:19,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:19,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:12:19,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:12:19,372 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 10 states. [2020-07-07 11:12:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:19,423 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-07-07 11:12:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:12:19,423 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-07-07 11:12:19,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:19,425 INFO L225 Difference]: With dead ends: 27 [2020-07-07 11:12:19,425 INFO L226 Difference]: Without dead ends: 23 [2020-07-07 11:12:19,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:12:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-07 11:12:19,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-07 11:12:19,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-07 11:12:19,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-07-07 11:12:19,433 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-07-07 11:12:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:19,433 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-07-07 11:12:19,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:12:19,434 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-07-07 11:12:19,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:12:19,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:19,435 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:19,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-07-07 11:12:19,649 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:19,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:19,650 INFO L82 PathProgramCache]: Analyzing trace with hash 376843494, now seen corresponding path program 1 times [2020-07-07 11:12:19,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:19,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182004166] [2020-07-07 11:12:19,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,866 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:19,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182004166] [2020-07-07 11:12:19,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172935622] [2020-07-07 11:12:19,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:19,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:19,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-07 11:12:19,903 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:19,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:19,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-07 11:12:19,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353813636] [2020-07-07 11:12:19,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:12:19,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:19,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:12:19,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:12:19,951 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-07-07 11:12:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:19,988 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-07-07 11:12:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:12:19,988 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-07 11:12:19,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:19,990 INFO L225 Difference]: With dead ends: 35 [2020-07-07 11:12:19,990 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:12:19,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:12:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:12:19,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-07-07 11:12:19,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-07 11:12:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-07 11:12:19,997 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 27 [2020-07-07 11:12:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:19,998 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-07 11:12:19,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:12:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-07 11:12:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-07 11:12:19,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:19,999 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:20,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:20,213 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:20,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:20,214 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2020-07-07 11:12:20,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:20,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111850830] [2020-07-07 11:12:20,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:20,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:12:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-07 11:12:20,298 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-07-07 11:12:20,298 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-07 11:12:20,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 11:12:20,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:12:20 BoogieIcfgContainer [2020-07-07 11:12:20,325 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:12:20,328 INFO L168 Benchmark]: Toolchain (without parser) took 2612.15 ms. Allocated memory was 143.7 MB in the beginning and 235.9 MB in the end (delta: 92.3 MB). Free memory was 103.2 MB in the beginning and 178.4 MB in the end (delta: -75.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:20,329 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 143.7 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:12:20,329 INFO L168 Benchmark]: CACSL2BoogieTranslator took 204.13 ms. Allocated memory is still 143.7 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:20,330 INFO L168 Benchmark]: Boogie Preprocessor took 107.60 ms. Allocated memory was 143.7 MB in the beginning and 202.9 MB in the end (delta: 59.2 MB). Free memory was 93.3 MB in the beginning and 182.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:20,331 INFO L168 Benchmark]: RCFGBuilder took 232.78 ms. Allocated memory is still 202.9 MB. Free memory was 182.2 MB in the beginning and 170.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:20,332 INFO L168 Benchmark]: TraceAbstraction took 2062.96 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 169.9 MB in the beginning and 178.4 MB in the end (delta: -8.6 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:20,336 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 143.7 MB. Free memory was 121.7 MB in the beginning and 121.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 204.13 ms. Allocated memory is still 143.7 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 107.60 ms. Allocated memory was 143.7 MB in the beginning and 202.9 MB in the end (delta: 59.2 MB). Free memory was 93.3 MB in the beginning and 182.2 MB in the end (delta: -89.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 232.78 ms. Allocated memory is still 202.9 MB. Free memory was 182.2 MB in the beginning and 170.5 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2062.96 ms. Allocated memory was 202.9 MB in the beginning and 235.9 MB in the end (delta: 33.0 MB). Free memory was 169.9 MB in the beginning and 178.4 MB in the end (delta: -8.6 MB). Peak memory consumption was 24.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int input = __VERIFIER_nondet_int(); [L13] CALL, EXPR id(input) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L6] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L6] int ret = id((unsigned int)x-1) + 1; [L7] COND FALSE !(ret > 3) [L8] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L13] RET, EXPR id(input) VAL [id(input)=2, input=2] [L13] int result = id(input); [L14] COND TRUE result == 2 VAL [input=2, result=2] [L15] __VERIFIER_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 77 SDtfs, 12 SDslu, 314 SDs, 0 SdLazy, 70 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=4, 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, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 154 NumberOfCodeBlocks, 154 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 121 ConstructedInterpolants, 0 QuantifiedInterpolants, 4855 SizeOfPredicates, 4 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 30/42 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...