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/ldv-regression/test28-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:01:09,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:01:09,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:01:09,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-20 13:01:09,211 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:01:09,212 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:01:09,213 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:01:09,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:01:09,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:01:09,216 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:01:09,218 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:01:09,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:01:09,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:01:09,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:01:09,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:01:09,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:01:09,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:01:09,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:01:09,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:01:09,237 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:01:09,238 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 [2019-09-20 13:01:09,253 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:01:09,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:01:09,254 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-20 13:01:09,254 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-20 13:01:09,255 INFO L138 SettingsManager]: * Use SBE=true [2019-09-20 13:01:09,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:01:09,255 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:01:09,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-20 13:01:09,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:01:09,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:01:09,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:01:09,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:01:09,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:01:09,256 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:01:09,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:01:09,257 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-20 13:01:09,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:01:09,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:01:09,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:01:09,258 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-20 13:01:09,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-20 13:01:09,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:01:09,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:01:09,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:01:09,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-20 13:01:09,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-20 13:01:09,259 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:01:09,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-20 13:01:09,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:01:09,288 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:01:09,300 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:01:09,304 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:01:09,305 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:01:09,306 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:01:09,306 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-2.c [2019-09-20 13:01:09,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e25f17cd/5778a22604284e66aa249218c4b9cb45/FLAG65c031709 [2019-09-20 13:01:09,771 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:01:09,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-2.c [2019-09-20 13:01:09,777 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e25f17cd/5778a22604284e66aa249218c4b9cb45/FLAG65c031709 [2019-09-20 13:01:10,144 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e25f17cd/5778a22604284e66aa249218c4b9cb45 [2019-09-20 13:01:10,157 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:01:10,159 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:01:10,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:01:10,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:01:10,164 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:01:10,165 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c303a87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10, skipping insertion in model container [2019-09-20 13:01:10,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,176 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:01:10,193 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:01:10,396 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:01:10,412 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:01:10,431 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:01:10,449 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:01:10,450 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10 WrapperNode [2019-09-20 13:01:10,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:01:10,451 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:01:10,451 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:01:10,451 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:01:10,594 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,605 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,627 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (1/1) ... [2019-09-20 13:01:10,634 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:01:10,635 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:01:10,635 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:01:10,635 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:01:10,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (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 [2019-09-20 13:01:10,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:01:10,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:01:10,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:01:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:01:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:01:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:01:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-20 13:01:10,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-20 13:01:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-20 13:01:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-20 13:01:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:01:10,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:01:10,936 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:01:10,936 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-20 13:01:10,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:01:10 BoogieIcfgContainer [2019-09-20 13:01:10,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:01:10,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:01:10,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:01:10,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:01:10,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:01:10" (1/3) ... [2019-09-20 13:01:10,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea283ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:01:10, skipping insertion in model container [2019-09-20 13:01:10,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:01:10" (2/3) ... [2019-09-20 13:01:10,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ea283ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:01:10, skipping insertion in model container [2019-09-20 13:01:10,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:01:10" (3/3) ... [2019-09-20 13:01:10,948 INFO L109 eAbstractionObserver]: Analyzing ICFG test28-2.c [2019-09-20 13:01:10,959 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:01:10,968 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:01:10,990 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:01:11,049 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-20 13:01:11,050 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:01:11,050 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-20 13:01:11,050 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:01:11,050 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:01:11,050 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:01:11,051 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:01:11,051 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:01:11,051 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:01:11,077 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-09-20 13:01:11,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:01:11,082 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:11,083 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:11,085 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:11,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:11,091 INFO L82 PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times [2019-09-20 13:01:11,093 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:11,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:11,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,154 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:11,154 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:01:11,336 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:01:11,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-20 13:01:11,339 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-20 13:01:11,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-20 13:01:11,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:01:11,353 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 4 states. [2019-09-20 13:01:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:11,432 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2019-09-20 13:01:11,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:01:11,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-09-20 13:01:11,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:11,444 INFO L225 Difference]: With dead ends: 34 [2019-09-20 13:01:11,444 INFO L226 Difference]: Without dead ends: 21 [2019-09-20 13:01:11,447 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-09-20 13:01:11,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-20 13:01:11,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16. [2019-09-20 13:01:11,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-20 13:01:11,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-20 13:01:11,487 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2019-09-20 13:01:11,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:11,488 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-20 13:01:11,488 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-20 13:01:11,488 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-20 13:01:11,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:01:11,489 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:11,489 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:11,490 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:11,490 INFO L82 PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times [2019-09-20 13:01:11,492 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:11,492 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:11,501 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,502 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:11,502 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:01:11,654 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:01:11,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-09-20 13:01:11,656 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-20 13:01:11,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-20 13:01:11,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:01:11,658 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2019-09-20 13:01:11,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:11,747 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-09-20 13:01:11,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:01:11,747 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2019-09-20 13:01:11,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:11,749 INFO L225 Difference]: With dead ends: 23 [2019-09-20 13:01:11,749 INFO L226 Difference]: Without dead ends: 14 [2019-09-20 13:01:11,750 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-09-20 13:01:11,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-09-20 13:01:11,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-09-20 13:01:11,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-09-20 13:01:11,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2019-09-20 13:01:11,755 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2019-09-20 13:01:11,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:11,755 INFO L475 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2019-09-20 13:01:11,755 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-20 13:01:11,756 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2019-09-20 13:01:11,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:01:11,756 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:01:11,756 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:01:11,757 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:01:11,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:01:11,757 INFO L82 PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times [2019-09-20 13:01:11,758 INFO L224 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-20 13:01:11,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-20 13:01:11,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,760 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:01:11,760 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:01:11,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:01:11,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:01:11,941 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:01:11,941 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-09-20 13:01:11,942 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-20 13:01:11,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-20 13:01:11,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-09-20 13:01:11,943 INFO L87 Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 8 states. [2019-09-20 13:01:12,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:01:12,042 INFO L93 Difference]: Finished difference Result 14 states and 13 transitions. [2019-09-20 13:01:12,043 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:01:12,043 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2019-09-20 13:01:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:01:12,044 INFO L225 Difference]: With dead ends: 14 [2019-09-20 13:01:12,044 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:01:12,046 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:01:12,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:01:12,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:01:12,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:01:12,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:01:12,050 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2019-09-20 13:01:12,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:01:12,050 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:01:12,051 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-20 13:01:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:01:12,052 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:01:12,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-20 13:01:12,081 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-09-20 13:01:12,081 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-09-20 13:01:12,081 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-20 13:01:12,082 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-20 13:01:12,082 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-20 13:01:12,082 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-20 13:01:12,082 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-20 13:01:12,082 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 10 28) no Hoare annotation was computed. [2019-09-20 13:01:12,083 INFO L439 ceAbstractionStarter]: At program point L21(lines 11 28) the Hoare annotation is: false [2019-09-20 13:01:12,083 INFO L443 ceAbstractionStarter]: For program point L15(lines 15 19) no Hoare annotation was computed. [2019-09-20 13:01:12,083 INFO L443 ceAbstractionStarter]: For program point L15-2(lines 15 19) no Hoare annotation was computed. [2019-09-20 13:01:12,083 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 10 28) no Hoare annotation was computed. [2019-09-20 13:01:12,083 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 10 28) the Hoare annotation is: true [2019-09-20 13:01:12,084 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2019-09-20 13:01:12,084 INFO L443 ceAbstractionStarter]: For program point L20(line 20) no Hoare annotation was computed. [2019-09-20 13:01:12,084 INFO L443 ceAbstractionStarter]: For program point L20-2(lines 20 22) no Hoare annotation was computed. [2019-09-20 13:01:12,084 INFO L443 ceAbstractionStarter]: For program point L14(line 14) no Hoare annotation was computed. [2019-09-20 13:01:12,084 INFO L443 ceAbstractionStarter]: For program point L14-2(line 14) no Hoare annotation was computed. [2019-09-20 13:01:12,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:01:12 BoogieIcfgContainer [2019-09-20 13:01:12,096 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:01:12,100 INFO L168 Benchmark]: Toolchain (without parser) took 1939.90 ms. Allocated memory was 131.6 MB in the beginning and 201.3 MB in the end (delta: 69.7 MB). Free memory was 87.2 MB in the beginning and 94.4 MB in the end (delta: -7.2 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:12,102 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory was 105.6 MB in the beginning and 105.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:01:12,104 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.64 ms. Allocated memory is still 131.6 MB. Free memory was 86.8 MB in the beginning and 77.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:12,107 INFO L168 Benchmark]: Boogie Preprocessor took 183.71 ms. Allocated memory was 131.6 MB in the beginning and 201.3 MB in the end (delta: 69.7 MB). Free memory was 77.2 MB in the beginning and 177.6 MB in the end (delta: -100.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:12,108 INFO L168 Benchmark]: RCFGBuilder took 304.00 ms. Allocated memory is still 201.3 MB. Free memory was 177.0 MB in the beginning and 163.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:12,110 INFO L168 Benchmark]: TraceAbstraction took 1155.88 ms. Allocated memory is still 201.3 MB. Free memory was 163.4 MB in the beginning and 94.4 MB in the end (delta: 69.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. [2019-09-20 13:01:12,120 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 131.6 MB. Free memory was 105.6 MB in the beginning and 105.4 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.64 ms. Allocated memory is still 131.6 MB. Free memory was 86.8 MB in the beginning and 77.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 183.71 ms. Allocated memory was 131.6 MB in the beginning and 201.3 MB in the end (delta: 69.7 MB). Free memory was 77.2 MB in the beginning and 177.6 MB in the end (delta: -100.5 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 304.00 ms. Allocated memory is still 201.3 MB. Free memory was 177.0 MB in the beginning and 163.4 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1155.88 ms. Allocated memory is still 201.3 MB. Free memory was 163.4 MB in the beginning and 94.4 MB in the end (delta: 69.0 MB). Peak memory consumption was 69.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. SAFE Result, 1.0s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 30 SDtfs, 32 SDslu, 71 SDs, 0 SdLazy, 75 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 5 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1320 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...