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-crafted/simple_array_index_value_1-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:51:31,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:51:31,341 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:51:31,352 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:51:31,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:51:31,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:51:31,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:51:31,413 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 [2019-09-03 20:51:31,437 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:51:31,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:51:31,437 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-03 20:51:31,438 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-03 20:51:31,438 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-03 20:51:31,439 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-03 20:51:31,439 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-03 20:51:31,439 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-03 20:51:31,439 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-03 20:51:31,439 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-03 20:51:31,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:51:31,440 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:51:31,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:51:31,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:51:31,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:51:31,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:51:31,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:51:31,441 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:51:31,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:51:31,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:51:31,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:51:31,442 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-03 20:51:31,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:51:31,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:51:31,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:51:31,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:51:31,443 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-03 20:51:31,443 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:51:31,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:51:31,444 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-03 20:51:31,479 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:51:31,489 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:51:31,493 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:51:31,494 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:51:31,494 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:51:31,495 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-09-03 20:51:31,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3aee1f8f/a548a9b9257a4ce68bb80f0714c36186/FLAGa1e71b6f5 [2019-09-03 20:51:31,993 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:51:31,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_1-1.i [2019-09-03 20:51:31,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3aee1f8f/a548a9b9257a4ce68bb80f0714c36186/FLAGa1e71b6f5 [2019-09-03 20:51:32,363 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3aee1f8f/a548a9b9257a4ce68bb80f0714c36186 [2019-09-03 20:51:32,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:51:32,376 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:51:32,377 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:51:32,377 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:51:32,381 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:51:32,382 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:51:32" (1/1) ... [2019-09-03 20:51:32,385 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@113fe790 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32, skipping insertion in model container [2019-09-03 20:51:32,385 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:51:32" (1/1) ... [2019-09-03 20:51:32,392 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:51:32,410 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:51:32,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:51:32,559 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:51:32,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:51:32,612 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:51:32,612 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32 WrapperNode [2019-09-03 20:51:32,613 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:51:32,613 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:51:32,613 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:51:32,613 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:51:32,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32" (1/1) ... [2019-09-03 20:51:32,707 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32" (1/1) ... [2019-09-03 20:51:32,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32" (1/1) ... [2019-09-03 20:51:32,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32" (1/1) ... [2019-09-03 20:51:32,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32" (1/1) ... [2019-09-03 20:51:32,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32" (1/1) ... [2019-09-03 20:51:32,725 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32" (1/1) ... [2019-09-03 20:51:32,726 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:51:32,727 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:51:32,727 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:51:32,727 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:51:32,728 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:51:32,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:51:32,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:51:32,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:51:32,789 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:51:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:51:32,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:51:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:51:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-03 20:51:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-03 20:51:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-03 20:51:32,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-03 20:51:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:51:32,791 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:51:35,016 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:51:35,016 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-03 20:51:35,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:51:35 BoogieIcfgContainer [2019-09-03 20:51:35,018 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:51:35,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:51:35,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:51:35,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:51:35,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:51:32" (1/3) ... [2019-09-03 20:51:35,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374c468f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:51:35, skipping insertion in model container [2019-09-03 20:51:35,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:51:32" (2/3) ... [2019-09-03 20:51:35,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@374c468f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:51:35, skipping insertion in model container [2019-09-03 20:51:35,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:51:35" (3/3) ... [2019-09-03 20:51:35,026 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_1-1.i [2019-09-03 20:51:35,036 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:51:35,045 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:51:35,065 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:51:35,098 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:51:35,098 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-03 20:51:35,098 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:51:35,098 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:51:35,099 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:51:35,099 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:51:35,099 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:51:35,099 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:51:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2019-09-03 20:51:35,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 20:51:35,129 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:35,130 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:35,132 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:35,137 INFO L82 PathProgramCache]: Analyzing trace with hash -956066777, now seen corresponding path program 1 times [2019-09-03 20:51:35,140 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:35,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:35,196 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:35,196 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:35,196 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:35,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:35,284 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:51:35,284 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:51:35,284 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:35,287 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:51:35,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:51:35,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:51:35,300 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2019-09-03 20:51:35,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:35,315 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2019-09-03 20:51:35,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:51:35,316 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2019-09-03 20:51:35,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:35,327 INFO L225 Difference]: With dead ends: 27 [2019-09-03 20:51:35,327 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 20:51:35,329 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 [2019-09-03 20:51:35,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 20:51:35,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-09-03 20:51:35,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-09-03 20:51:35,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2019-09-03 20:51:35,368 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2019-09-03 20:51:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:35,369 INFO L475 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2019-09-03 20:51:35,369 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:51:35,369 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2019-09-03 20:51:35,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-03 20:51:35,371 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:35,371 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:35,371 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:35,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:35,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1471973101, now seen corresponding path program 1 times [2019-09-03 20:51:35,372 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:35,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:35,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:35,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:35,374 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:35,495 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:51:35,495 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:51:35,495 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:35,497 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:51:35,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:51:35,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:51:35,498 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 3 states. [2019-09-03 20:51:35,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:35,564 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2019-09-03 20:51:35,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:51:35,567 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-09-03 20:51:35,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:35,568 INFO L225 Difference]: With dead ends: 29 [2019-09-03 20:51:35,568 INFO L226 Difference]: Without dead ends: 29 [2019-09-03 20:51:35,569 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 [2019-09-03 20:51:35,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-03 20:51:35,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2019-09-03 20:51:35,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-03 20:51:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-09-03 20:51:35,576 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 14 [2019-09-03 20:51:35,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:35,577 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-09-03 20:51:35,577 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:51:35,577 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-09-03 20:51:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:51:35,578 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:51:35,578 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:51:35,579 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:51:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:35,579 INFO L82 PathProgramCache]: Analyzing trace with hash 534952077, now seen corresponding path program 1 times [2019-09-03 20:51:35,579 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-03 20:51:35,580 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:35,581 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:51:35,581 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:51:35,581 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-03 20:51:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:51:35,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:51:35,682 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:51:35,682 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-03 20:51:35,683 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 17 with the following transitions: [2019-09-03 20:51:35,685 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [27], [30], [44], [47], [49], [55], [56], [57], [59] [2019-09-03 20:51:35,721 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-03 20:51:35,721 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-03 20:51:35,787 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-03 20:51:35,789 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 17 variables. [2019-09-03 20:51:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:51:35,793 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-03 20:51:35,826 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-03 20:51:35,827 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-03 20:51:35,828 INFO L420 sIntCurrentIteration]: We unified 15 AI predicates to 15 [2019-09-03 20:51:35,829 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-03 20:51:35,830 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-03 20:51:35,830 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 4 [2019-09-03 20:51:35,830 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-03 20:51:35,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:51:35,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:51:35,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:51:35,831 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 2 states. [2019-09-03 20:51:35,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:51:35,832 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-03 20:51:35,833 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:51:35,833 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2019-09-03 20:51:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:51:35,833 INFO L225 Difference]: With dead ends: 6 [2019-09-03 20:51:35,833 INFO L226 Difference]: Without dead ends: 0 [2019-09-03 20:51:35,834 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:51:35,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-03 20:51:35,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-03 20:51:35,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-03 20:51:35,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-03 20:51:35,835 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2019-09-03 20:51:35,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:51:35,836 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-03 20:51:35,836 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:51:35,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-03 20:51:35,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-03 20:51:35,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.09 08:51:35 BoogieIcfgContainer [2019-09-03 20:51:35,841 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-03 20:51:35,844 INFO L168 Benchmark]: Toolchain (without parser) took 3466.57 ms. Allocated memory was 137.9 MB in the beginning and 198.2 MB in the end (delta: 60.3 MB). Free memory was 85.8 MB in the beginning and 118.0 MB in the end (delta: -32.2 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:35,845 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 137.9 MB. Free memory was 103.9 MB in the beginning and 103.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-03 20:51:35,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.74 ms. Allocated memory is still 137.9 MB. Free memory was 85.6 MB in the beginning and 76.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:35,847 INFO L168 Benchmark]: Boogie Preprocessor took 113.26 ms. Allocated memory was 137.9 MB in the beginning and 198.2 MB in the end (delta: 60.3 MB). Free memory was 76.0 MB in the beginning and 174.9 MB in the end (delta: -98.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:35,848 INFO L168 Benchmark]: RCFGBuilder took 2291.25 ms. Allocated memory is still 198.2 MB. Free memory was 174.9 MB in the beginning and 161.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:35,849 INFO L168 Benchmark]: TraceAbstraction took 822.48 ms. Allocated memory is still 198.2 MB. Free memory was 160.7 MB in the beginning and 118.0 MB in the end (delta: 42.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. [2019-09-03 20:51:35,853 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 137.9 MB. Free memory was 103.9 MB in the beginning and 103.7 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.74 ms. Allocated memory is still 137.9 MB. Free memory was 85.6 MB in the beginning and 76.0 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.26 ms. Allocated memory was 137.9 MB in the beginning and 198.2 MB in the end (delta: 60.3 MB). Free memory was 76.0 MB in the beginning and 174.9 MB in the end (delta: -98.8 MB). Peak memory consumption was 11.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2291.25 ms. Allocated memory is still 198.2 MB. Free memory was 174.9 MB in the beginning and 161.3 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 822.48 ms. Allocated memory is still 198.2 MB. Free memory was 160.7 MB in the beginning and 118.0 MB in the end (delta: 42.7 MB). Peak memory consumption was 42.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: 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 4 procedures, 27 locations, 1 error locations. SAFE Result, 0.7s OverallTime, 3 OverallIterations, 1 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 56 SDtfs, 4 SDslu, 16 SDs, 0 SdLazy, 12 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred 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, 0.95 AbsIntWeakeningRatio, 0.6666666666666666 AbsIntAvgWeakeningVarsNumRemoved, 0.4 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 41 ConstructedInterpolants, 0 QuantifiedInterpolants, 799 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...