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/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-0883e75 [2019-09-05 12:46:22,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-05 12:46:22,279 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-05 12:46:22,290 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-05 12:46:22,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-05 12:46:22,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-05 12:46:22,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-05 12:46:22,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-05 12:46:22,350 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-05 12:46:22,350 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-05 12:46:22,351 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-05 12:46:22,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2019-09-05 12:46:22,354 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 12:46:22,371 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-05 12:46:22,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-05 12:46:22,371 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-05 12:46:22,372 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-05 12:46:22,372 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-05 12:46:22,372 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-05 12:46:22,373 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-05 12:46:22,373 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-05 12:46:22,373 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-05 12:46:22,373 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-05 12:46:22,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-05 12:46:22,374 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-05 12:46:22,374 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-05 12:46:22,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-05 12:46:22,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-05 12:46:22,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-05 12:46:22,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-05 12:46:22,375 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-05 12:46:22,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-05 12:46:22,376 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-05 12:46:22,376 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-05 12:46:22,376 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-05 12:46:22,376 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-05 12:46:22,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-05 12:46:22,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-05 12:46:22,377 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-05 12:46:22,377 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-05 12:46:22,377 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-05 12:46:22,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-05 12:46:22,378 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-05 12:46:22,419 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-05 12:46:22,431 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-05 12:46:22,435 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-05 12:46:22,436 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-05 12:46:22,437 INFO L275 PluginConnector]: CDTParser initialized [2019-09-05 12:46:22,438 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2019-09-05 12:46:22,514 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e33536d/0e758a60507740fdb610bbef333d5eae/FLAGd2dcbd0ff [2019-09-05 12:46:22,928 INFO L306 CDTParser]: Found 1 translation units. [2019-09-05 12:46:22,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2019-09-05 12:46:22,937 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e33536d/0e758a60507740fdb610bbef333d5eae/FLAGd2dcbd0ff [2019-09-05 12:46:23,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9e33536d/0e758a60507740fdb610bbef333d5eae [2019-09-05 12:46:23,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-05 12:46:23,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-05 12:46:23,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:23,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-05 12:46:23,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-05 12:46:23,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f092bdf 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 12:46:23,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.09 12:46:23" (1/1) ... [2019-09-05 12:46:23,335 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-05 12:46:23,348 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-05 12:46:23,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:23,517 INFO L188 MainTranslator]: Completed pre-run [2019-09-05 12:46:23,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-05 12:46:23,548 INFO L192 MainTranslator]: Completed translation [2019-09-05 12:46:23,549 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.09 12:46:23 WrapperNode [2019-09-05 12:46:23,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-05 12:46:23,550 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-05 12:46:23,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-05 12:46:23,551 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-05 12:46:23,643 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 12:46:23,643 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 12:46:23,648 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 12:46:23,649 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 12:46:23,652 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 12:46:23,656 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 12:46:23,656 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 12:46:23,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-05 12:46:23,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-05 12:46:23,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-05 12:46:23,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-05 12:46:23,659 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 12:46:23,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-05 12:46:23,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-05 12:46:23,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-05 12:46:23,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-05 12:46:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-05 12:46:23,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-05 12:46:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-05 12:46:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-05 12:46:23,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-05 12:46:23,843 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-05 12:46:23,844 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-05 12:46:23,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.09 12:46:23 BoogieIcfgContainer [2019-09-05 12:46:23,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-05 12:46:23,846 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-05 12:46:23,846 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-05 12:46:23,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-05 12:46:23,849 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.09 12:46:23" (1/3) ... [2019-09-05 12:46:23,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7d0d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:23, skipping insertion in model container [2019-09-05 12:46:23,850 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 12:46:23,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b7d0d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.09 12:46:23, skipping insertion in model container [2019-09-05 12:46:23,851 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 12:46:23,853 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2019-09-05 12:46:23,862 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-05 12:46:23,869 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-05 12:46:23,883 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-05 12:46:23,909 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-05 12:46:23,910 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-05 12:46:23,910 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-05 12:46:23,910 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-05 12:46:23,910 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-05 12:46:23,910 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-05 12:46:23,910 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-05 12:46:23,911 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-05 12:46:23,925 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states. [2019-09-05 12:46:23,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-05 12:46:23,934 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:23,935 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:23,938 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:23,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times [2019-09-05 12:46:23,946 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:23,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:23,982 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:23,982 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:23,982 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:24,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:24,130 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 12:46:24,133 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:24,133 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-05 12:46:24,134 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:24,141 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-05 12:46:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-05 12:46:24,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-05 12:46:24,169 INFO L87 Difference]: Start difference. First operand 17 states. Second operand 3 states. [2019-09-05 12:46:24,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:24,201 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-09-05 12:46:24,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-05 12:46:24,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-05 12:46:24,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:24,233 INFO L225 Difference]: With dead ends: 18 [2019-09-05 12:46:24,233 INFO L226 Difference]: Without dead ends: 12 [2019-09-05 12:46:24,235 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 12:46:24,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-09-05 12:46:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-09-05 12:46:24,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-09-05 12:46:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-09-05 12:46:24,263 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2019-09-05 12:46:24,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:24,263 INFO L475 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-09-05 12:46:24,264 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-05 12:46:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-09-05 12:46:24,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-09-05 12:46:24,264 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:24,265 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:24,265 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:24,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:24,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times [2019-09-05 12:46:24,266 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:24,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,267 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:24,267 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,267 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:24,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:24,357 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-05 12:46:24,358 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 12 with the following transitions: [2019-09-05 12:46:24,359 INFO L207 CegarAbsIntRunner]: [0], [4], [11], [13], [19], [22], [24], [30], [31], [32], [34] [2019-09-05 12:46:24,390 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-05 12:46:24,390 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-05 12:46:24,445 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-05 12:46:24,501 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-05 12:46:24,504 INFO L272 AbstractInterpreter]: Visited 11 different actions 41 times. Merged at 2 different actions 10 times. Widened at 1 different actions 3 times. Performed 74 root evaluator evaluations with a maximum evaluation depth of 5. Performed 74 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 1 fixpoints after 1 different actions. Largest state had 3 variables. [2019-09-05 12:46:24,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:24,508 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-05 12:46:24,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-05 12:46:24,508 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode Z3_IG No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-05 12:46:24,520 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:24,521 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) [2019-09-05 12:46:24,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:24,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-05 12:46:24,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-05 12:46:24,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:24,583 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-05 12:46:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-05 12:46:24,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-05 12:46:24,635 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2019-09-05 12:46:24,635 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-05 12:46:24,636 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:46:24,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:46:24,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:46:24,637 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 5 states. [2019-09-05 12:46:24,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:24,654 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-09-05 12:46:24,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-05 12:46:24,655 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2019-09-05 12:46:24,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:24,656 INFO L225 Difference]: With dead ends: 13 [2019-09-05 12:46:24,656 INFO L226 Difference]: Without dead ends: 13 [2019-09-05 12:46:24,657 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-09-05 12:46:24,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-05 12:46:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-05 12:46:24,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-05 12:46:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-09-05 12:46:24,661 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-09-05 12:46:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:24,662 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-09-05 12:46:24,662 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:46:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-09-05 12:46:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-09-05 12:46:24,663 INFO L391 BasicCegarLoop]: Found error trace [2019-09-05 12:46:24,663 INFO L399 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-05 12:46:24,664 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-05 12:46:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-05 12:46:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1490448798, now seen corresponding path program 2 times [2019-09-05 12:46:24,665 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-05 12:46:24,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,666 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-05 12:46:24,666 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-05 12:46:24,667 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-05 12:46:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-05 12:46:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-05 12:46:24,784 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-05 12:46:24,784 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-05 12:46:24,784 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-05 12:46:24,785 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-05 12:46:24,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-05 12:46:24,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-05 12:46:24,790 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 5 states. [2019-09-05 12:46:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-05 12:46:24,812 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2019-09-05 12:46:24,812 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-05 12:46:24,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2019-09-05 12:46:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-05 12:46:24,813 INFO L225 Difference]: With dead ends: 11 [2019-09-05 12:46:24,813 INFO L226 Difference]: Without dead ends: 0 [2019-09-05 12:46:24,814 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 12:46:24,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-05 12:46:24,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-05 12:46:24,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-05 12:46:24,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-05 12:46:24,815 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2019-09-05 12:46:24,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-05 12:46:24,815 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-05 12:46:24,815 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-05 12:46:24,815 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-05 12:46:24,816 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-05 12:46:24,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.09 12:46:24 BoogieIcfgContainer [2019-09-05 12:46:24,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-05 12:46:24,824 INFO L168 Benchmark]: Toolchain (without parser) took 1502.04 ms. Allocated memory was 134.2 MB in the beginning and 199.8 MB in the end (delta: 65.5 MB). Free memory was 90.1 MB in the beginning and 106.9 MB in the end (delta: -16.8 MB). Peak memory consumption was 48.7 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,826 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 134.2 MB. Free memory was 108.5 MB in the beginning and 108.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.57 ms. Allocated memory is still 134.2 MB. Free memory was 89.9 MB in the beginning and 80.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,830 INFO L168 Benchmark]: Boogie Preprocessor took 106.94 ms. Allocated memory was 134.2 MB in the beginning and 199.8 MB in the end (delta: 65.5 MB). Free memory was 80.9 MB in the beginning and 176.9 MB in the end (delta: -96.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,831 INFO L168 Benchmark]: RCFGBuilder took 187.41 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 166.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,832 INFO L168 Benchmark]: TraceAbstraction took 975.25 ms. Allocated memory is still 199.8 MB. Free memory was 165.9 MB in the beginning and 106.9 MB in the end (delta: 59.0 MB). Peak memory consumption was 59.0 MB. Max. memory is 7.1 GB. [2019-09-05 12:46:24,843 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 134.2 MB. Free memory was 108.5 MB in the beginning and 108.3 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.57 ms. Allocated memory is still 134.2 MB. Free memory was 89.9 MB in the beginning and 80.9 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.94 ms. Allocated memory was 134.2 MB in the beginning and 199.8 MB in the end (delta: 65.5 MB). Free memory was 80.9 MB in the beginning and 176.9 MB in the end (delta: -96.0 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 187.41 ms. Allocated memory is still 199.8 MB. Free memory was 176.9 MB in the beginning and 166.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 975.25 ms. Allocated memory is still 199.8 MB. Free memory was 165.9 MB in the beginning and 106.9 MB in the end (delta: 59.0 MB). Peak memory consumption was 59.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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, 17 locations, 1 error locations. SAFE Result, 0.9s OverallTime, 3 OverallIterations, 2 TraceHistogramMax, 0.1s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 35 SDtfs, 1 SDslu, 52 SDs, 0 SdLazy, 14 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.1s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 1222 SizeOfPredicates, 1 NumberOfNonLiveVariables, 29 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 3/6 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...