/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_while_int.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 21:57:13,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 21:57:13,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 21:57:13,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-23 21:57:13,618 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 [2019-11-23 21:57:13,632 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 21:57:13,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 21:57:13,633 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 21:57:13,634 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 21:57:13,634 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 21:57:13,634 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 21:57:13,634 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 21:57:13,634 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 21:57:13,635 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 21:57:13,635 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 21:57:13,635 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 21:57:13,635 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 21:57:13,635 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 21:57:13,636 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 21:57:13,636 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 21:57:13,636 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 21:57:13,636 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 21:57:13,636 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 21:57:13,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 21:57:13,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 21:57:13,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 21:57:13,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 21:57:13,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 21:57:13,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 21:57:13,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 21:57:13,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 21:57:13,638 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 21:57:13,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 21:57:13,639 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 21:57:13,639 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 21:57:13,925 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 21:57:13,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 21:57:13,947 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 21:57:13,949 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 21:57:13,950 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 21:57:13,950 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-11-23 21:57:14,022 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1ac0075/d70f9478f7fb49e78a059608276d2a79/FLAG1338637de [2019-11-23 21:57:14,481 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 21:57:14,482 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_while_int.i [2019-11-23 21:57:14,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1ac0075/d70f9478f7fb49e78a059608276d2a79/FLAG1338637de [2019-11-23 21:57:14,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f1ac0075/d70f9478f7fb49e78a059608276d2a79 [2019-11-23 21:57:14,847 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 21:57:14,850 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 21:57:14,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 21:57:14,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 21:57:14,854 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 21:57:14,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:57:14" (1/1) ... [2019-11-23 21:57:14,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3442d96a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:14, skipping insertion in model container [2019-11-23 21:57:14,859 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:57:14" (1/1) ... [2019-11-23 21:57:14,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 21:57:14,881 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 21:57:15,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:57:15,032 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 21:57:15,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 21:57:15,061 INFO L208 MainTranslator]: Completed translation [2019-11-23 21:57:15,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15 WrapperNode [2019-11-23 21:57:15,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 21:57:15,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 21:57:15,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 21:57:15,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 21:57:15,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (1/1) ... [2019-11-23 21:57:15,077 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (1/1) ... [2019-11-23 21:57:15,096 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 21:57:15,096 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 21:57:15,096 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 21:57:15,096 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 21:57:15,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (1/1) ... [2019-11-23 21:57:15,197 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (1/1) ... [2019-11-23 21:57:15,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (1/1) ... [2019-11-23 21:57:15,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (1/1) ... [2019-11-23 21:57:15,199 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (1/1) ... [2019-11-23 21:57:15,203 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (1/1) ... [2019-11-23 21:57:15,204 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (1/1) ... [2019-11-23 21:57:15,205 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 21:57:15,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 21:57:15,207 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 21:57:15,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 21:57:15,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (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 [2019-11-23 21:57:15,267 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 21:57:15,268 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 21:57:15,422 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 21:57:15,423 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-23 21:57:15,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:57:15 BoogieIcfgContainer [2019-11-23 21:57:15,424 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 21:57:15,426 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 21:57:15,427 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 21:57:15,431 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 21:57:15,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:57:14" (1/3) ... [2019-11-23 21:57:15,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74caefb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:57:15, skipping insertion in model container [2019-11-23 21:57:15,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:57:15" (2/3) ... [2019-11-23 21:57:15,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74caefb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:57:15, skipping insertion in model container [2019-11-23 21:57:15,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:57:15" (3/3) ... [2019-11-23 21:57:15,438 INFO L109 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2019-11-23 21:57:15,446 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 21:57:15,453 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 21:57:15,465 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 21:57:15,490 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 21:57:15,490 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 21:57:15,491 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 21:57:15,491 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 21:57:15,491 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 21:57:15,491 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 21:57:15,491 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 21:57:15,491 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 21:57:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-23 21:57:15,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-23 21:57:15,513 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:57:15,514 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-23 21:57:15,515 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:57:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:57:15,521 INFO L82 PathProgramCache]: Analyzing trace with hash 963404, now seen corresponding path program 1 times [2019-11-23 21:57:15,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:57:15,531 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521786035] [2019-11-23 21:57:15,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:57:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:57:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:57:15,692 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521786035] [2019-11-23 21:57:15,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 21:57:15,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 21:57:15,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34604832] [2019-11-23 21:57:15,702 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 21:57:15,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:57:15,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 21:57:15,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:57:15,720 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 4 states. [2019-11-23 21:57:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:57:15,787 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2019-11-23 21:57:15,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 21:57:15,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2019-11-23 21:57:15,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:57:15,808 INFO L225 Difference]: With dead ends: 19 [2019-11-23 21:57:15,808 INFO L226 Difference]: Without dead ends: 7 [2019-11-23 21:57:15,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 21:57:15,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-23 21:57:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-23 21:57:15,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-23 21:57:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-23 21:57:15,873 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2019-11-23 21:57:15,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:57:15,874 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-23 21:57:15,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 21:57:15,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-23 21:57:15,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 21:57:15,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:57:15,875 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2019-11-23 21:57:15,875 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:57:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:57:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash 925765417, now seen corresponding path program 1 times [2019-11-23 21:57:15,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:57:15,877 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981857496] [2019-11-23 21:57:15,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:57:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:57:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:57:15,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981857496] [2019-11-23 21:57:15,941 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526224216] [2019-11-23 21:57:15,941 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 [2019-11-23 21:57:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 21:57:15,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 22 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 21:57:15,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 21:57:16,003 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 21:57:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 21:57:16,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 21:57:16,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 21:57:16,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114384645] [2019-11-23 21:57:16,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 21:57:16,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 21:57:16,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 21:57:16,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-23 21:57:16,032 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 6 states. [2019-11-23 21:57:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 21:57:16,078 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-11-23 21:57:16,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 21:57:16,078 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2019-11-23 21:57:16,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 21:57:16,079 INFO L225 Difference]: With dead ends: 12 [2019-11-23 21:57:16,079 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 21:57:16,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-23 21:57:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 21:57:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-23 21:57:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 21:57:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 21:57:16,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-23 21:57:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 21:57:16,085 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 21:57:16,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 21:57:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 21:57:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 21:57:16,086 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 21:57:16,086 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2019-11-23 21:57:16,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 21:57:16,289 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 21:57:16,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 21:57:16,291 INFO L82 PathProgramCache]: Analyzing trace with hash 602269638, now seen corresponding path program 2 times [2019-11-23 21:57:16,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 21:57:16,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936258555] [2019-11-23 21:57:16,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 21:57:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 21:57:16,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-11-23 21:57:16,344 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2019-11-23 21:57:16,344 INFO L475 BasicCegarLoop]: Counterexample might be feasible [2019-11-23 21:57:16,360 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:57:16 BoogieIcfgContainer [2019-11-23 21:57:16,360 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-23 21:57:16,362 INFO L168 Benchmark]: Toolchain (without parser) took 1513.27 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 102.7 MB in the beginning and 132.3 MB in the end (delta: -29.6 MB). Peak memory consumption was 28.6 MB. Max. memory is 7.1 GB. [2019-11-23 21:57:16,363 INFO L168 Benchmark]: CDTParser took 0.47 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-11-23 21:57:16,364 INFO L168 Benchmark]: CACSL2BoogieTranslator took 211.35 ms. Allocated memory is still 144.2 MB. Free memory was 102.5 MB in the beginning and 93.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2019-11-23 21:57:16,365 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.33 ms. Allocated memory is still 144.2 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2019-11-23 21:57:16,367 INFO L168 Benchmark]: Boogie Preprocessor took 109.32 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.7 MB in the beginning and 180.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2019-11-23 21:57:16,368 INFO L168 Benchmark]: RCFGBuilder took 217.45 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 171.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-11-23 21:57:16,368 INFO L168 Benchmark]: TraceAbstraction took 933.51 ms. Allocated memory is still 202.4 MB. Free memory was 170.4 MB in the beginning and 132.3 MB in the end (delta: 38.1 MB). Peak memory consumption was 38.1 MB. Max. memory is 7.1 GB. [2019-11-23 21:57:16,373 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.47 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 211.35 ms. Allocated memory is still 144.2 MB. Free memory was 102.5 MB in the beginning and 93.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 33.33 ms. Allocated memory is still 144.2 MB. Free memory was 93.1 MB in the beginning and 91.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.32 ms. Allocated memory was 144.2 MB in the beginning and 202.4 MB in the end (delta: 58.2 MB). Free memory was 91.7 MB in the beginning and 180.9 MB in the end (delta: -89.2 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 217.45 ms. Allocated memory is still 202.4 MB. Free memory was 180.9 MB in the beginning and 171.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 933.51 ms. Allocated memory is still 202.4 MB. Free memory was 170.4 MB in the beginning and 132.3 MB in the end (delta: 38.1 MB). Peak memory consumption was 38.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L23] int i=0; [L24] COND TRUE i<5 [L25] i++ [L18] (b) ? (0) : __blast_assert () [L24] COND TRUE i<5 [L25] i++ [L18] (b) ? (0) : __blast_assert () [L24] COND TRUE i<5 [L25] i++ [L18] (b) ? (0) : __blast_assert () [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: UNSAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 11 SDtfs, 7 SDslu, 15 SDs, 0 SdLazy, 21 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred 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, 2 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 159 SizeOfPredicates, 3 NumberOfNonLiveVariables, 22 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...