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-acceleration/array_4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:46:22,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:46:22,226 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:46:22,237 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 12:46:22,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-05 12:46:22,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-05 12:46:22,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-05 12:46:22,277 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 [2019-09-05 12:46:22,307 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:46:22,308 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:46:22,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 12:46:22,310 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 12:46:22,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 12:46:22,312 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 12:46:22,312 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 12:46:22,312 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 12:46:22,313 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 12:46:22,313 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 12:46:22,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:46:22,318 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:46:22,318 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:46:22,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:46:22,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:46:22,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:46:22,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:46:22,319 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:46:22,320 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:46:22,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:46:22,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:46:22,321 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 12:46:22,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:46:22,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:46:22,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:46:22,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:46:22,322 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 12:46:22,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:46:22,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:46:22,322 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 12:46:22,370 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:46:22,382 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:46:22,386 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:46:22,387 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:46:22,388 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:46:22,388 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_4.i [2019-09-05 12:46:22,450 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925dcbad4/6e026862ffe44ef7af78a81c8c0a0f93/FLAG9a8009fd5 [2019-09-05 12:46:22,888 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:46:22,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_4.i [2019-09-05 12:46:22,896 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925dcbad4/6e026862ffe44ef7af78a81c8c0a0f93/FLAG9a8009fd5 [2019-09-05 12:46:23,304 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925dcbad4/6e026862ffe44ef7af78a81c8c0a0f93 [2019-09-05 12:46:23,313 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:46:23,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:46:23,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:23,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:46:23,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:46:23,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61381dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23, skipping insertion in model container [2019-09-05 12:46:23,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,331 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:46:23,349 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:46:23,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:23,530 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:46:23,550 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:23,569 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:46:23,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23 WrapperNode [2019-09-05 12:46:23,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:23,570 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:46:23,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:46:23,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:46:23,676 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,683 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,683 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,698 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:46:23,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:46:23,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:46:23,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:46:23,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23" (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 [2019-09-05 12:46:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:46:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:46:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:46:23,763 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:46:23,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:46:23,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-05 12:46:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:46:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:46:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-05 12:46:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-05 12:46:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-05 12:46:23,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-05 12:46:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:46:23,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:46:23,992 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:46:23,992 INFO L283 CfgBuilder]: Removed 2 assume(true) statements. [2019-09-05 12:46:23,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:23 BoogieIcfgContainer [2019-09-05 12:46:24,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:46:24,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:46:24,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:46:24,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:46:24,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:46:23" (1/3) ... [2019-09-05 12:46:24,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c1f453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:24, skipping insertion in model container [2019-09-05 12:46:24,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23" (2/3) ... [2019-09-05 12:46:24,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c1f453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:24, skipping insertion in model container [2019-09-05 12:46:24,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:23" (3/3) ... [2019-09-05 12:46:24,014 INFO L109 eAbstractionObserver]: Analyzing ICFG array_4.i [2019-09-05 12:46:24,036 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:46:24,050 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:46:24,066 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:46:24,092 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:46:24,092 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 12:46:24,092 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:46:24,092 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:46:24,092 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:46:24,093 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:46:24,093 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:46:24,093 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:46:24,106 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-05 12:46:24,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-05 12:46:24,113 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:24,114 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:24,116 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:24,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:24,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1816719235, now seen corresponding path program 1 times [2019-09-05 12:46:24,122 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:24,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,162 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:24,162 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,163 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:24,242 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:24,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-05 12:46:24,242 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:24,246 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:46:24,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:46:24,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:24,262 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2019-09-05 12:46:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:24,280 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-09-05 12:46:24,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:46:24,281 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-09-05 12:46:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:24,291 INFO L225 Difference]: With dead ends: 24 [2019-09-05 12:46:24,291 INFO L226 Difference]: Without dead ends: 17 [2019-09-05 12:46:24,293 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 [2019-09-05 12:46:24,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-09-05 12:46:24,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-09-05 12:46:24,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-05 12:46:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-09-05 12:46:24,331 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2019-09-05 12:46:24,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:24,332 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-09-05 12:46:24,332 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:46:24,332 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-09-05 12:46:24,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-05 12:46:24,333 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:24,333 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:24,333 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:24,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:24,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1663088498, now seen corresponding path program 1 times [2019-09-05 12:46:24,334 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:24,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:24,336 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,336 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:24,398 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:24,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 12:46:24,399 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:24,403 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 12:46:24,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 12:46:24,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:46:24,404 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 3 states. [2019-09-05 12:46:24,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:24,452 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2019-09-05 12:46:24,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 12:46:24,453 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2019-09-05 12:46:24,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:24,455 INFO L225 Difference]: With dead ends: 23 [2019-09-05 12:46:24,455 INFO L226 Difference]: Without dead ends: 23 [2019-09-05 12:46:24,457 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 [2019-09-05 12:46:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-05 12:46:24,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2019-09-05 12:46:24,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-05 12:46:24,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-05 12:46:24,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2019-09-05 12:46:24,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:24,463 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-05 12:46:24,463 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 12:46:24,464 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-05 12:46:24,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-05 12:46:24,464 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:24,465 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:24,465 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:24,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:24,465 INFO L82 PathProgramCache]: Analyzing trace with hash 845539860, now seen corresponding path program 1 times [2019-09-05 12:46:24,466 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:24,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,467 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:24,467 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,467 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:24,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:24,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-05 12:46:24,586 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:24,587 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:46:24,588 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:24,588 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:46:24,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:46:24,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:46:24,590 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 5 states. [2019-09-05 12:46:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:24,666 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2019-09-05 12:46:24,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:46:24,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-05 12:46:24,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:24,668 INFO L225 Difference]: With dead ends: 25 [2019-09-05 12:46:24,669 INFO L226 Difference]: Without dead ends: 22 [2019-09-05 12:46:24,669 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-05 12:46:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-05 12:46:24,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-09-05 12:46:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-05 12:46:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-05 12:46:24,674 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-09-05 12:46:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:24,675 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-05 12:46:24,675 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:46:24,675 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-05 12:46:24,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-05 12:46:24,676 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:24,676 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:24,676 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:24,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:24,677 INFO L82 PathProgramCache]: Analyzing trace with hash 221784433, now seen corresponding path program 1 times [2019-09-05 12:46:24,677 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:24,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,678 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:24,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,679 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-05 12:46:24,772 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:24,773 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:24,773 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-05 12:46:24,778 INFO L207 CegarAbsIntRunner]: [0], [1], [5], [11], [13], [15], [19], [23], [26], [28], [30], [37], [40], [42], [48], [49], [50], [52] [2019-09-05 12:46:24,812 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 12:46:24,812 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 12:46:24,880 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-05 12:46:24,882 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 19 variables. [2019-09-05 12:46:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:24,886 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-05 12:46:24,920 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-09-05 12:46:24,921 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-05 12:46:24,923 INFO L420 sIntCurrentIteration]: We unified 18 AI predicates to 18 [2019-09-05 12:46:24,923 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-05 12:46:24,923 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-05 12:46:24,924 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 6 [2019-09-05 12:46:24,924 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:24,924 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-05 12:46:24,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-05 12:46:24,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:24,925 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 2 states. [2019-09-05 12:46:24,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:24,926 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2019-09-05 12:46:24,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-05 12:46:24,926 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 19 [2019-09-05 12:46:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:24,927 INFO L225 Difference]: With dead ends: 6 [2019-09-05 12:46:24,927 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 12:46:24,927 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-05 12:46:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 12:46:24,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 12:46:24,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 12:46:24,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 12:46:24,928 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-09-05 12:46:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:24,929 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 12:46:24,929 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-05 12:46:24,929 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 12:46:24,929 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 12:46:24,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 12:46:24 BoogieIcfgContainer [2019-09-05 12:46:24,935 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 12:46:24,938 INFO L168 Benchmark]: Toolchain (without parser) took 1622.37 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 88.4 MB in the beginning and 111.4 MB in the end (delta: -23.0 MB). Peak memory consumption was 44.1 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,939 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 132.6 MB. Free memory was 106.8 MB in the beginning and 106.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,940 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.98 ms. Allocated memory is still 132.6 MB. Free memory was 88.2 MB in the beginning and 78.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,941 INFO L168 Benchmark]: Boogie Preprocessor took 130.56 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 78.5 MB in the beginning and 175.6 MB in the end (delta: -97.0 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,942 INFO L168 Benchmark]: RCFGBuilder took 300.35 ms. Allocated memory is still 199.8 MB. Free memory was 175.6 MB in the beginning and 162.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,943 INFO L168 Benchmark]: TraceAbstraction took 932.62 ms. Allocated memory is still 199.8 MB. Free memory was 162.0 MB in the beginning and 111.4 MB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,947 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 132.6 MB. Free memory was 106.8 MB in the beginning and 106.6 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.98 ms. Allocated memory is still 132.6 MB. Free memory was 88.2 MB in the beginning and 78.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.56 ms. Allocated memory was 132.6 MB in the beginning and 199.8 MB in the end (delta: 67.1 MB). Free memory was 78.5 MB in the beginning and 175.6 MB in the end (delta: -97.0 MB). Peak memory consumption was 15.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 300.35 ms. Allocated memory is still 199.8 MB. Free memory was 175.6 MB in the beginning and 162.0 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 932.62 ms. Allocated memory is still 199.8 MB. Free memory was 162.0 MB in the beginning and 111.4 MB in the end (delta: 50.6 MB). Peak memory consumption was 50.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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, 24 locations, 1 error locations. SAFE Result, 0.8s OverallTime, 4 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 57 SDtfs, 7 SDslu, 45 SDs, 0 SdLazy, 32 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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, 0.9583333333333334 AbsIntWeakeningRatio, 0.6666666666666666 AbsIntAvgWeakeningVarsNumRemoved, 0.3333333333333333 AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 62 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 1392 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 3 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...