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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fea9116 [2019-09-20 13:25:53,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-20 13:25:53,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-20 13:25:53,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-20 13:25:53,194 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-20 13:25:53,195 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-20 13:25:53,197 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-20 13:25:53,199 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-20 13:25:53,200 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-20 13:25:53,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-20 13:25:53,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-20 13:25:53,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-20 13:25:53,204 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-20 13:25:53,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-20 13:25:53,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-20 13:25:53,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-20 13:25:53,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-20 13:25:53,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-20 13:25:53,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-20 13:25:53,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-20 13:25:53,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-20 13:25:53,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-20 13:25:53,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-20 13:25:53,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-20 13:25:53,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-20 13:25:53,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-20 13:25:53,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-20 13:25:53,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-20 13:25:53,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-20 13:25:53,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-20 13:25:53,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-20 13:25:53,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-20 13:25:53,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-20 13:25:53,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-20 13:25:53,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-20 13:25:53,230 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-20 13:25:53,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-09-20 13:25:53,246 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-20 13:25:53,247 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-20 13:25:53,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-20 13:25:53,247 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-20 13:25:53,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-20 13:25:53,248 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-20 13:25:53,248 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-20 13:25:53,248 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-20 13:25:53,249 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-20 13:25:53,249 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-20 13:25:53,250 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-20 13:25:53,250 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-20 13:25:53,250 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-20 13:25:53,250 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-20 13:25:53,250 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-20 13:25:53,251 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-20 13:25:53,251 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-20 13:25:53,251 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-20 13:25:53,251 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-20 13:25:53,251 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-20 13:25:53,252 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-20 13:25:53,252 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-20 13:25:53,252 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-20 13:25:53,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:53,252 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-20 13:25:53,253 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-20 13:25:53,253 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-20 13:25:53,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-20 13:25:53,253 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-20 13:25:53,253 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-20 13:25:53,294 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-20 13:25:53,304 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-20 13:25:53,308 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-20 13:25:53,309 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-20 13:25:53,310 INFO L275 PluginConnector]: CDTParser initialized [2019-09-20 13:25:53,310 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c [2019-09-20 13:25:53,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db6d962e8/0f9e1c592ebe4e2db1630da72f114845/FLAG0c3ba72f8 [2019-09-20 13:25:53,892 INFO L306 CDTParser]: Found 1 translation units. [2019-09-20 13:25:53,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.c.i.v+lhb-reducer.c [2019-09-20 13:25:53,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db6d962e8/0f9e1c592ebe4e2db1630da72f114845/FLAG0c3ba72f8 [2019-09-20 13:25:54,267 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db6d962e8/0f9e1c592ebe4e2db1630da72f114845 [2019-09-20 13:25:54,278 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-20 13:25:54,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-20 13:25:54,281 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:54,281 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-20 13:25:54,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-20 13:25:54,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a17818b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54, skipping insertion in model container [2019-09-20 13:25:54,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,296 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-20 13:25:54,315 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-20 13:25:54,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:54,516 INFO L188 MainTranslator]: Completed pre-run [2019-09-20 13:25:54,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-20 13:25:54,544 INFO L192 MainTranslator]: Completed translation [2019-09-20 13:25:54,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54 WrapperNode [2019-09-20 13:25:54,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-20 13:25:54,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-20 13:25:54,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-20 13:25:54,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-20 13:25:54,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,648 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,657 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,659 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,660 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... [2019-09-20 13:25:54,662 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-20 13:25:54,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-20 13:25:54,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-20 13:25:54,662 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-20 13:25:54,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-20 13:25:54,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-20 13:25:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-20 13:25:54,724 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-20 13:25:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-20 13:25:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-09-20 13:25:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-20 13:25:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-20 13:25:54,724 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-20 13:25:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-20 13:25:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-20 13:25:54,907 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-20 13:25:54,907 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-20 13:25:54,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:54 BoogieIcfgContainer [2019-09-20 13:25:54,909 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-20 13:25:54,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-20 13:25:54,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-20 13:25:54,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-20 13:25:54,915 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:25:54" (1/3) ... [2019-09-20 13:25:54,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa36174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:54, skipping insertion in model container [2019-09-20 13:25:54,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:25:54" (2/3) ... [2019-09-20 13:25:54,916 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aa36174 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:25:54, skipping insertion in model container [2019-09-20 13:25:54,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:25:54" (3/3) ... [2019-09-20 13:25:54,918 INFO L109 eAbstractionObserver]: Analyzing ICFG gsv2008.c.i.v+lhb-reducer.c [2019-09-20 13:25:54,929 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-20 13:25:54,937 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-20 13:25:54,954 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-20 13:25:54,983 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-20 13:25:54,983 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-20 13:25:54,983 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-20 13:25:54,983 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-20 13:25:54,983 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-20 13:25:54,984 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-20 13:25:54,984 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-20 13:25:54,984 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-20 13:25:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2019-09-20 13:25:55,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-20 13:25:55,004 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:55,005 INFO L407 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:55,007 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:55,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:55,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1883805102, now seen corresponding path program 1 times [2019-09-20 13:25:55,014 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:55,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,069 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:55,069 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,069 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:55,363 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 13:25:55,367 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-20 13:25:55,367 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-20 13:25:55,367 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:55,382 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:55,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:55,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-20 13:25:55,428 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 5 states. [2019-09-20 13:25:55,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:55,589 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-09-20 13:25:55,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-20 13:25:55,592 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-20 13:25:55,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:55,603 INFO L225 Difference]: With dead ends: 27 [2019-09-20 13:25:55,603 INFO L226 Difference]: Without dead ends: 16 [2019-09-20 13:25:55,607 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-09-20 13:25:55,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-20 13:25:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-20 13:25:55,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-20 13:25:55,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-20 13:25:55,652 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2019-09-20 13:25:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:55,653 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-20 13:25:55,653 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-20 13:25:55,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-20 13:25:55,655 INFO L399 BasicCegarLoop]: Found error trace [2019-09-20 13:25:55,655 INFO L407 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-20 13:25:55,656 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-20 13:25:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:55,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2141584271, now seen corresponding path program 1 times [2019-09-20 13:25:55,658 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-20 13:25:55,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,661 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:55,661 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-20 13:25:55,661 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-20 13:25:55,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:55,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:55,794 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-20 13:25:55,795 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-09-20 13:25:55,797 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [9], [13], [16], [18], [21], [23], [26], [27], [32], [33], [34] [2019-09-20 13:25:55,834 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-20 13:25:55,835 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-20 13:25:55,964 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-20 13:25:55,966 INFO L272 AbstractInterpreter]: Visited 14 different actions 50 times. Merged at 5 different actions 36 times. Widened at 1 different actions 4 times. Performed 164 root evaluator evaluations with a maximum evaluation depth of 4. Performed 164 inverse root evaluator evaluations with a maximum inverse evaluation depth of 4. Found 1 fixpoints after 1 different actions. Largest state had 13 variables. [2019-09-20 13:25:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-20 13:25:55,971 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-20 13:25:55,972 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-20 13:25:55,972 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-20 13:25:55,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-20 13:25:55,992 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-20 13:25:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-20 13:25:56,029 INFO L256 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-20 13:25:56,037 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-20 13:25:56,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-20 13:25:56,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:56,115 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-20 13:25:56,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-20 13:25:56,187 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-09-20 13:25:56,187 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-09-20 13:25:56,187 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-20 13:25:56,188 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-20 13:25:56,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-20 13:25:56,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-09-20 13:25:56,190 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2019-09-20 13:25:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-20 13:25:56,231 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-09-20 13:25:56,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-20 13:25:56,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-09-20 13:25:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-20 13:25:56,232 INFO L225 Difference]: With dead ends: 14 [2019-09-20 13:25:56,232 INFO L226 Difference]: Without dead ends: 0 [2019-09-20 13:25:56,234 INFO L636 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-09-20 13:25:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-20 13:25:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-20 13:25:56,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-20 13:25:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-20 13:25:56,235 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-09-20 13:25:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-20 13:25:56,235 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-20 13:25:56,236 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-20 13:25:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-20 13:25:56,236 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-20 13:25:56,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:25:56 BoogieIcfgContainer [2019-09-20 13:25:56,242 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-20 13:25:56,245 INFO L168 Benchmark]: Toolchain (without parser) took 1963.83 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 87.2 MB in the beginning and 97.0 MB in the end (delta: -9.9 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,246 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 132.1 MB. Free memory was 106.3 MB in the beginning and 106.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,247 INFO L168 Benchmark]: CACSL2BoogieTranslator took 264.27 ms. Allocated memory is still 132.1 MB. Free memory was 87.0 MB in the beginning and 77.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,248 INFO L168 Benchmark]: Boogie Preprocessor took 116.26 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 77.5 MB in the beginning and 174.5 MB in the end (delta: -97.1 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,249 INFO L168 Benchmark]: RCFGBuilder took 246.75 ms. Allocated memory is still 198.7 MB. Free memory was 174.5 MB in the beginning and 162.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,250 INFO L168 Benchmark]: TraceAbstraction took 1331.98 ms. Allocated memory is still 198.7 MB. Free memory was 162.3 MB in the beginning and 97.0 MB in the end (delta: 65.2 MB). Peak memory consumption was 65.2 MB. Max. memory is 7.1 GB. [2019-09-20 13:25:56,254 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 132.1 MB. Free memory was 106.3 MB in the beginning and 106.1 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 264.27 ms. Allocated memory is still 132.1 MB. Free memory was 87.0 MB in the beginning and 77.5 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.26 ms. Allocated memory was 132.1 MB in the beginning and 198.7 MB in the end (delta: 66.6 MB). Free memory was 77.5 MB in the beginning and 174.5 MB in the end (delta: -97.1 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 246.75 ms. Allocated memory is still 198.7 MB. Free memory was 174.5 MB in the beginning and 162.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1331.98 ms. Allocated memory is still 198.7 MB. Free memory was 162.3 MB in the beginning and 97.0 MB in the end (delta: 65.2 MB). Peak memory consumption was 65.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 52]: 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 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 18 locations, 1 error locations. SAFE Result, 1.2s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.2s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 27 SDtfs, 13 SDslu, 63 SDs, 0 SdLazy, 27 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s 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, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 2380 SizeOfPredicates, 6 NumberOfNonLiveVariables, 70 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...