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/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:19:43,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:19:43,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:19:43,024 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-03 19:19:43,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-03 19:19:43,025 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-03 19:19:43,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-03 19:19:43,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-03 19:19:43,030 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-03 19:19:43,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-03 19:19:43,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-03 19:19:43,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-03 19:19:43,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:19:43,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:19:43,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:19:43,036 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:19:43,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:19:43,038 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:19:43,040 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:19:43,042 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:19:43,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:19:43,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:19:43,045 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:19:43,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:19:43,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:19:43,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:19:43,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:19:43,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:19:43,058 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 [2019-09-03 19:19:43,072 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:19:43,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:19:43,073 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:19:43,073 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:19:43,073 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:19:43,074 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:19:43,074 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:19:43,074 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:19:43,074 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:19:43,074 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:19:43,075 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:19:43,075 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:19:43,075 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:19:43,075 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:19:43,075 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:19:43,076 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:19:43,076 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:19:43,076 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:19:43,076 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:19:43,076 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:19:43,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:19:43,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:19:43,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:19:43,077 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:19:43,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:19:43,078 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:19:43,078 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:19:43,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:19:43,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:19:43,106 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:19:43,117 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:19:43,121 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:19:43,122 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:19:43,122 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:19:43,123 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-09-03 19:19:43,191 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a19d581a/f1a8cffed2c04126a906f11d0ae823b8/FLAG7e71c692e [2019-09-03 19:19:43,610 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:19:43,610 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/for_bounded_loop1.c [2019-09-03 19:19:43,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a19d581a/f1a8cffed2c04126a906f11d0ae823b8/FLAG7e71c692e [2019-09-03 19:19:44,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a19d581a/f1a8cffed2c04126a906f11d0ae823b8 [2019-09-03 19:19:44,034 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:19:44,035 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:19:44,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:44,036 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:19:44,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:19:44,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2da04a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44, skipping insertion in model container [2019-09-03 19:19:44,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,048 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:19:44,064 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:19:44,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:44,240 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:19:44,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:19:44,271 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:19:44,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44 WrapperNode [2019-09-03 19:19:44,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:19:44,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:19:44,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:19:44,272 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:19:44,359 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,374 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,380 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,385 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (1/1) ... [2019-09-03 19:19:44,387 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:19:44,387 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:19:44,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:19:44,388 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:19:44,388 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (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 [2019-09-03 19:19:44,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:19:44,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:19:44,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 19:19:44,435 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:19:44,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:19:44,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-03 19:19:44,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:19:44,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-03 19:19:44,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:19:44,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:19:44,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:19:44,635 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:19:44,636 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 19:19:44,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:44 BoogieIcfgContainer [2019-09-03 19:19:44,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:19:44,650 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:19:44,650 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:19:44,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:19:44,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:19:44" (1/3) ... [2019-09-03 19:19:44,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38956c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:44, skipping insertion in model container [2019-09-03 19:19:44,656 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:19:44" (2/3) ... [2019-09-03 19:19:44,656 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38956c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:19:44, skipping insertion in model container [2019-09-03 19:19:44,664 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:19:44" (3/3) ... [2019-09-03 19:19:44,670 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2019-09-03 19:19:44,690 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:19:44,703 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:19:44,742 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:19:44,772 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:19:44,773 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:19:44,773 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:19:44,773 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:19:44,773 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:19:44,774 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:19:44,775 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:19:44,776 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:19:44,776 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:19:44,798 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-09-03 19:19:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-03 19:19:44,804 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:44,804 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:44,806 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:44,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:44,810 INFO L82 PathProgramCache]: Analyzing trace with hash 429908039, now seen corresponding path program 1 times [2019-09-03 19:19:44,812 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:44,812 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:44,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:44,849 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:44,849 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:44,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:45,042 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:45,043 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-03 19:19:45,047 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 19:19:45,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 19:19:45,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-03 19:19:45,065 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 6 states. [2019-09-03 19:19:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:45,191 INFO L93 Difference]: Finished difference Result 50 states and 70 transitions. [2019-09-03 19:19:45,191 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 19:19:45,193 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2019-09-03 19:19:45,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:45,203 INFO L225 Difference]: With dead ends: 50 [2019-09-03 19:19:45,204 INFO L226 Difference]: Without dead ends: 26 [2019-09-03 19:19:45,208 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:19:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-03 19:19:45,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2019-09-03 19:19:45,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 19:19:45,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2019-09-03 19:19:45,255 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 11 [2019-09-03 19:19:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:45,255 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2019-09-03 19:19:45,256 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 19:19:45,256 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2019-09-03 19:19:45,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-09-03 19:19:45,257 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,257 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,258 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1060899037, now seen corresponding path program 1 times [2019-09-03 19:19:45,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,260 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,260 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:19:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:19:45,416 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:19:45,416 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-03 19:19:45,417 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 19:19:45,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 19:19:45,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:19:45,420 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2019-09-03 19:19:45,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:19:45,525 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-09-03 19:19:45,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 19:19:45,525 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2019-09-03 19:19:45,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:19:45,527 INFO L225 Difference]: With dead ends: 32 [2019-09-03 19:19:45,527 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 19:19:45,528 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 19:19:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 19:19:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-09-03 19:19:45,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-03 19:19:45,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-09-03 19:19:45,535 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 18 [2019-09-03 19:19:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:19:45,536 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-09-03 19:19:45,536 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 19:19:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-09-03 19:19:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-03 19:19:45,537 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:19:45,537 INFO L399 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:19:45,538 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:19:45,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:19:45,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1415691032, now seen corresponding path program 1 times [2019-09-03 19:19:45,538 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:19:45,539 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:19:45,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,540 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:19:45,540 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:19:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-03 19:19:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2019-09-03 19:19:45,589 INFO L466 BasicCegarLoop]: Counterexample might be feasible [2019-09-03 19:19:45,625 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 07:19:45 BoogieIcfgContainer [2019-09-03 19:19:45,626 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 19:19:45,629 INFO L168 Benchmark]: Toolchain (without parser) took 1592.34 ms. Allocated memory was 132.6 MB in the beginning and 199.2 MB in the end (delta: 66.6 MB). Free memory was 88.4 MB in the beginning and 101.5 MB in the end (delta: -13.0 MB). Peak memory consumption was 53.6 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:45,630 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 132.6 MB. Free memory is still 106.5 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-03 19:19:45,632 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.69 ms. Allocated memory is still 132.6 MB. Free memory was 88.0 MB in the beginning and 79.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:45,635 INFO L168 Benchmark]: Boogie Preprocessor took 114.79 ms. Allocated memory was 132.6 MB in the beginning and 199.2 MB in the end (delta: 66.6 MB). Free memory was 79.0 MB in the beginning and 175.1 MB in the end (delta: -96.1 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:45,636 INFO L168 Benchmark]: RCFGBuilder took 251.10 ms. Allocated memory is still 199.2 MB. Free memory was 175.1 MB in the beginning and 163.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:45,637 INFO L168 Benchmark]: TraceAbstraction took 976.21 ms. Allocated memory is still 199.2 MB. Free memory was 163.2 MB in the beginning and 101.5 MB in the end (delta: 61.8 MB). Peak memory consumption was 61.8 MB. Max. memory is 7.1 GB. [2019-09-03 19:19:45,647 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 132.6 MB. Free memory is still 106.5 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.69 ms. Allocated memory is still 132.6 MB. Free memory was 88.0 MB in the beginning and 79.0 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.79 ms. Allocated memory was 132.6 MB in the beginning and 199.2 MB in the end (delta: 66.6 MB). Free memory was 79.0 MB in the beginning and 175.1 MB in the end (delta: -96.1 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 251.10 ms. Allocated memory is still 199.2 MB. Free memory was 175.1 MB in the beginning and 163.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 976.21 ms. Allocated memory is still 199.2 MB. Free memory was 163.2 MB in the beginning and 101.5 MB in the end (delta: 61.8 MB). Peak memory consumption was 61.8 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: [L14] int i=0, x=0, y=0; [L15] int n=__VERIFIER_nondet_int(); [L16] COND FALSE !(!(n>0)) [L17] i=0 VAL [i=0, n=1, x=0, y=0] [L17] COND TRUE i