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/array-examples/standard_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 05:29:02,100 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 05:29:02,103 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 05:29:02,114 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 05:29:02,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 05:29:02,157 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 05:29:02,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 05:29:02,159 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 [2019-09-09 05:29:02,187 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 05:29:02,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 05:29:02,188 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 05:29:02,189 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 05:29:02,189 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 05:29:02,190 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 05:29:02,190 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 05:29:02,190 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 05:29:02,190 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 05:29:02,190 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 05:29:02,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 05:29:02,193 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 05:29:02,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 05:29:02,194 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 05:29:02,194 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 05:29:02,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 05:29:02,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 05:29:02,194 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 05:29:02,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 05:29:02,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 05:29:02,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 05:29:02,195 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 05:29:02,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 05:29:02,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 05:29:02,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 05:29:02,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 05:29:02,196 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 05:29:02,197 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 05:29:02,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 05:29:02,197 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 05:29:02,250 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 05:29:02,264 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 05:29:02,267 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 05:29:02,269 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 05:29:02,269 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 05:29:02,270 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2019-09-09 05:29:02,332 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9afb2755/f58ed492e0df4ada85eddd1efbe733b7/FLAGefa084fb6 [2019-09-09 05:29:02,785 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 05:29:02,786 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_sentinel.i.v+cfa-reducer.c [2019-09-09 05:29:02,792 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9afb2755/f58ed492e0df4ada85eddd1efbe733b7/FLAGefa084fb6 [2019-09-09 05:29:03,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f9afb2755/f58ed492e0df4ada85eddd1efbe733b7 [2019-09-09 05:29:03,186 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 05:29:03,187 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 05:29:03,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 05:29:03,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 05:29:03,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 05:29:03,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:29:03" (1/1) ... [2019-09-09 05:29:03,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d1a98f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03, skipping insertion in model container [2019-09-09 05:29:03,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:29:03" (1/1) ... [2019-09-09 05:29:03,202 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 05:29:03,218 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 05:29:03,399 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 05:29:03,404 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 05:29:03,425 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 05:29:03,525 INFO L192 MainTranslator]: Completed translation [2019-09-09 05:29:03,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03 WrapperNode [2019-09-09 05:29:03,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 05:29:03,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 05:29:03,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 05:29:03,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 05:29:03,539 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03" (1/1) ... [2019-09-09 05:29:03,540 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03" (1/1) ... [2019-09-09 05:29:03,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03" (1/1) ... [2019-09-09 05:29:03,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03" (1/1) ... [2019-09-09 05:29:03,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03" (1/1) ... [2019-09-09 05:29:03,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03" (1/1) ... [2019-09-09 05:29:03,559 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03" (1/1) ... [2019-09-09 05:29:03,561 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 05:29:03,561 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 05:29:03,562 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 05:29:03,562 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 05:29:03,562 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03" (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 [2019-09-09 05:29:03,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 05:29:03,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 05:29:03,617 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 05:29:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 05:29:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 05:29:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-09 05:29:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 05:29:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-09 05:29:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-09 05:29:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-09 05:29:03,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-09 05:29:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 05:29:03,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 05:29:03,839 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 05:29:03,839 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 05:29:03,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:29:03 BoogieIcfgContainer [2019-09-09 05:29:03,842 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 05:29:03,844 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 05:29:03,844 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 05:29:03,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 05:29:03,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:29:03" (1/3) ... [2019-09-09 05:29:03,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331f4707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:29:03, skipping insertion in model container [2019-09-09 05:29:03,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:29:03" (2/3) ... [2019-09-09 05:29:03,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@331f4707 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:29:03, skipping insertion in model container [2019-09-09 05:29:03,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:29:03" (3/3) ... [2019-09-09 05:29:03,869 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2019-09-09 05:29:03,897 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 05:29:03,909 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 05:29:03,938 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 05:29:03,971 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 05:29:03,971 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 05:29:03,971 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 05:29:03,971 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 05:29:03,971 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 05:29:03,971 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 05:29:03,972 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 05:29:03,972 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 05:29:03,983 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-09 05:29:03,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-09 05:29:03,992 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:29:03,992 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 05:29:03,994 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:29:04,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:29:04,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1429065311, now seen corresponding path program 1 times [2019-09-09 05:29:04,002 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:29:04,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:29:04,047 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:29:04,047 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:29:04,048 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:29:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:29:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 05:29:04,138 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:29:04,138 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-09 05:29:04,138 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:29:04,142 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-09 05:29:04,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-09 05:29:04,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 05:29:04,155 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-09 05:29:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:29:04,169 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2019-09-09 05:29:04,169 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-09 05:29:04,171 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-09-09 05:29:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:29:04,180 INFO L225 Difference]: With dead ends: 19 [2019-09-09 05:29:04,180 INFO L226 Difference]: Without dead ends: 15 [2019-09-09 05:29:04,182 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 05:29:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-09-09 05:29:04,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-09-09 05:29:04,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-09-09 05:29:04,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2019-09-09 05:29:04,216 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2019-09-09 05:29:04,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:29:04,217 INFO L475 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2019-09-09 05:29:04,217 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-09 05:29:04,217 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2019-09-09 05:29:04,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-09 05:29:04,218 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:29:04,218 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 05:29:04,219 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:29:04,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:29:04,219 INFO L82 PathProgramCache]: Analyzing trace with hash 399010521, now seen corresponding path program 1 times [2019-09-09 05:29:04,219 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:29:04,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:29:04,221 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:29:04,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:29:04,221 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:29:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:29:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 05:29:04,288 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 05:29:04,288 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 05:29:04,288 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:29:04,289 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 05:29:04,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 05:29:04,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 05:29:04,291 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2019-09-09 05:29:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:29:04,308 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2019-09-09 05:29:04,309 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 05:29:04,309 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-09 05:29:04,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:29:04,310 INFO L225 Difference]: With dead ends: 17 [2019-09-09 05:29:04,310 INFO L226 Difference]: Without dead ends: 17 [2019-09-09 05:29:04,311 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 05:29:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-09 05:29:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2019-09-09 05:29:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-09 05:29:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2019-09-09 05:29:04,316 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2019-09-09 05:29:04,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:29:04,316 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2019-09-09 05:29:04,316 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 05:29:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2019-09-09 05:29:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-09-09 05:29:04,317 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 05:29:04,317 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 05:29:04,318 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 05:29:04,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:29:04,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1207654839, now seen corresponding path program 1 times [2019-09-09 05:29:04,318 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 05:29:04,319 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:29:04,320 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 05:29:04,320 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 05:29:04,320 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 05:29:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 05:29:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 05:29:04,393 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 05:29:04,393 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 05:29:04,394 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 16 with the following transitions: [2019-09-09 05:29:04,396 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [21], [24], [26], [31], [34], [35], [41], [42], [43] [2019-09-09 05:29:04,428 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 05:29:04,429 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 05:29:04,492 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 05:29:04,494 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 0. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 29 variables. [2019-09-09 05:29:04,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 05:29:04,497 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 05:29:04,533 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-09 05:29:04,533 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 05:29:04,535 INFO L420 sIntCurrentIteration]: We unified 14 AI predicates to 14 [2019-09-09 05:29:04,535 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 05:29:04,536 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 05:29:04,536 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-09-09 05:29:04,536 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 05:29:04,537 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-09 05:29:04,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-09 05:29:04,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 05:29:04,538 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 2 states. [2019-09-09 05:29:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 05:29:04,539 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-09 05:29:04,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-09 05:29:04,539 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-09-09 05:29:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 05:29:04,540 INFO L225 Difference]: With dead ends: 6 [2019-09-09 05:29:04,540 INFO L226 Difference]: Without dead ends: 0 [2019-09-09 05:29:04,540 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-09 05:29:04,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-09 05:29:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-09 05:29:04,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-09 05:29:04,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-09 05:29:04,541 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 15 [2019-09-09 05:29:04,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 05:29:04,542 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-09 05:29:04,542 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-09 05:29:04,542 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-09 05:29:04,542 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-09 05:29:04,546 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.09 05:29:04 BoogieIcfgContainer [2019-09-09 05:29:04,546 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-09 05:29:04,549 INFO L168 Benchmark]: Toolchain (without parser) took 1360.58 ms. Allocated memory was 134.7 MB in the beginning and 201.3 MB in the end (delta: 66.6 MB). Free memory was 89.6 MB in the beginning and 125.1 MB in the end (delta: -35.5 MB). Peak memory consumption was 31.1 MB. Max. memory is 7.1 GB. [2019-09-09 05:29:04,550 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 134.7 MB. Free memory is still 107.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-09 05:29:04,551 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.00 ms. Allocated memory was 134.7 MB in the beginning and 201.3 MB in the end (delta: 66.6 MB). Free memory was 89.6 MB in the beginning and 178.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. [2019-09-09 05:29:04,552 INFO L168 Benchmark]: Boogie Preprocessor took 34.57 ms. Allocated memory is still 201.3 MB. Free memory was 178.6 MB in the beginning and 176.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. [2019-09-09 05:29:04,553 INFO L168 Benchmark]: RCFGBuilder took 281.15 ms. Allocated memory is still 201.3 MB. Free memory was 176.5 MB in the beginning and 162.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-09-09 05:29:04,554 INFO L168 Benchmark]: TraceAbstraction took 702.66 ms. Allocated memory is still 201.3 MB. Free memory was 162.1 MB in the beginning and 125.1 MB in the end (delta: 37.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. [2019-09-09 05:29:04,558 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 134.7 MB. Free memory is still 107.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 338.00 ms. Allocated memory was 134.7 MB in the beginning and 201.3 MB in the end (delta: 66.6 MB). Free memory was 89.6 MB in the beginning and 178.6 MB in the end (delta: -89.1 MB). Peak memory consumption was 25.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.57 ms. Allocated memory is still 201.3 MB. Free memory was 178.6 MB in the beginning and 176.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.15 ms. Allocated memory is still 201.3 MB. Free memory was 176.5 MB in the beginning and 162.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 702.66 ms. Allocated memory is still 201.3 MB. Free memory was 162.1 MB in the beginning and 125.1 MB in the end (delta: 37.0 MB). Peak memory consumption was 37.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: 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, 19 locations, 1 error locations. SAFE Result, 0.5s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 41 SDtfs, 1 SDslu, 12 SDs, 0 SdLazy, 5 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 1 AbstIntStrong, 0.9553571428571429 AbsIntWeakeningRatio, 1.0 AbsIntAvgWeakeningVarsNumRemoved, 1.1428571428571428 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 41 NumberOfCodeBlocks, 41 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 38 ConstructedInterpolants, 0 QuantifiedInterpolants, 592 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...