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/recursive-simple/sum_non_eq-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 03:12:10,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 03:12:10,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 03:12:10,169 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 03:12:10,200 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 [2019-09-10 03:12:10,214 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 03:12:10,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 03:12:10,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 03:12:10,215 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 03:12:10,215 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 03:12:10,216 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 03:12:10,216 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 03:12:10,216 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 03:12:10,216 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 03:12:10,216 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 03:12:10,217 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 03:12:10,217 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 03:12:10,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 03:12:10,218 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 03:12:10,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 03:12:10,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 03:12:10,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 03:12:10,218 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 03:12:10,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 03:12:10,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 03:12:10,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 03:12:10,219 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 03:12:10,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 03:12:10,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 03:12:10,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 03:12:10,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 03:12:10,220 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 03:12:10,220 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 03:12:10,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 03:12:10,221 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 03:12:10,251 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 03:12:10,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 03:12:10,265 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 03:12:10,267 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 03:12:10,267 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 03:12:10,268 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2019-09-10 03:12:10,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/821618786/84bd89759b224a45abb5cc297fdb12a1/FLAG4ff5b8d53 [2019-09-10 03:12:10,733 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 03:12:10,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_non_eq-2.c [2019-09-10 03:12:10,739 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/821618786/84bd89759b224a45abb5cc297fdb12a1/FLAG4ff5b8d53 [2019-09-10 03:12:11,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/821618786/84bd89759b224a45abb5cc297fdb12a1 [2019-09-10 03:12:11,167 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 03:12:11,171 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 03:12:11,173 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 03:12:11,173 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 03:12:11,177 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 03:12:11,177 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 03:12:11" (1/1) ... [2019-09-10 03:12:11,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69e25c94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11, skipping insertion in model container [2019-09-10 03:12:11,180 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 03:12:11" (1/1) ... [2019-09-10 03:12:11,188 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 03:12:11,207 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 03:12:11,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 03:12:11,387 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 03:12:11,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 03:12:11,422 INFO L192 MainTranslator]: Completed translation [2019-09-10 03:12:11,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11 WrapperNode [2019-09-10 03:12:11,422 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 03:12:11,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 03:12:11,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 03:12:11,423 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 03:12:11,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11" (1/1) ... [2019-09-10 03:12:11,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11" (1/1) ... [2019-09-10 03:12:11,525 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11" (1/1) ... [2019-09-10 03:12:11,525 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11" (1/1) ... [2019-09-10 03:12:11,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11" (1/1) ... [2019-09-10 03:12:11,534 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11" (1/1) ... [2019-09-10 03:12:11,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11" (1/1) ... [2019-09-10 03:12:11,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 03:12:11,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 03:12:11,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 03:12:11,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 03:12:11,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11" (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 [2019-09-10 03:12:11,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 03:12:11,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 03:12:11,595 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2019-09-10 03:12:11,596 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 03:12:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-09-10 03:12:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 03:12:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2019-09-10 03:12:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 03:12:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 03:12:11,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 03:12:11,748 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 03:12:11,748 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 03:12:11,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 03:12:11 BoogieIcfgContainer [2019-09-10 03:12:11,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 03:12:11,750 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 03:12:11,750 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 03:12:11,753 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 03:12:11,754 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 03:12:11" (1/3) ... [2019-09-10 03:12:11,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c2c824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 03:12:11, skipping insertion in model container [2019-09-10 03:12:11,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 03:12:11" (2/3) ... [2019-09-10 03:12:11,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c2c824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 03:12:11, skipping insertion in model container [2019-09-10 03:12:11,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 03:12:11" (3/3) ... [2019-09-10 03:12:11,757 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_non_eq-2.c [2019-09-10 03:12:11,766 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 03:12:11,774 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 03:12:11,794 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 03:12:11,848 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 03:12:11,849 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 03:12:11,849 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 03:12:11,849 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 03:12:11,849 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 03:12:11,849 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 03:12:11,849 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 03:12:11,850 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 03:12:11,873 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2019-09-10 03:12:11,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 03:12:11,892 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:12:11,893 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:12:11,895 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:12:11,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:12:11,903 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2019-09-10 03:12:11,905 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:12:11,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:12:11,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:12:11,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:12:11,977 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:12:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:12:12,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-10 03:12:12,323 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 03:12:12,323 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-10 03:12:12,323 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 03:12:12,328 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 03:12:12,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 03:12:12,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-09-10 03:12:12,347 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2019-09-10 03:12:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:12:12,473 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-09-10 03:12:12,473 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 03:12:12,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-09-10 03:12:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:12:12,486 INFO L225 Difference]: With dead ends: 26 [2019-09-10 03:12:12,487 INFO L226 Difference]: Without dead ends: 18 [2019-09-10 03:12:12,489 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-10 03:12:12,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-09-10 03:12:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-09-10 03:12:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-10 03:12:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2019-09-10 03:12:12,532 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2019-09-10 03:12:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:12:12,533 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2019-09-10 03:12:12,533 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 03:12:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2019-09-10 03:12:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-10 03:12:12,536 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 03:12:12,536 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 03:12:12,537 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 03:12:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:12:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2019-09-10 03:12:12,537 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 03:12:12,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:12:12,539 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:12:12,539 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 03:12:12,539 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 03:12:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:12:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 03:12:12,827 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:12:12,828 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 03:12:12,829 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 20 with the following transitions: [2019-09-10 03:12:12,832 INFO L207 CegarAbsIntRunner]: [0], [4], [7], [8], [10], [11], [12], [14], [17], [19], [25], [26], [27], [29], [30], [31], [32] [2019-09-10 03:12:12,878 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 03:12:12,878 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 03:12:12,982 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-09-10 03:12:13,036 INFO L263 AbstractInterpreter]: Some error location(s) were reachable [2019-09-10 03:12:13,038 INFO L272 AbstractInterpreter]: Visited 17 different actions 36 times. Never merged. Never widened. Performed 42 root evaluator evaluations with a maximum evaluation depth of 5. Performed 42 inverse root evaluator evaluations with a maximum inverse evaluation depth of 5. Found 4 fixpoints after 2 different actions. Largest state had 6 variables. [2019-09-10 03:12:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 03:12:13,043 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-09-10 03:12:13,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 03:12:13,044 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) [2019-09-10 03:12:13,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 03:12:13,061 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: FPandBP) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-10 03:12:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 03:12:13,091 WARN L254 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-10 03:12:13,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 03:12:13,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-10 03:12:13,280 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 03:12:13,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-09-10 03:12:15,736 WARN L188 SmtUtils]: Spent 2.09 s on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2019-09-10 03:12:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-10 03:12:15,840 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-09-10 03:12:15,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2019-09-10 03:12:15,841 INFO L250 anRefinementStrategy]: Using the first two imperfect interpolant sequences [2019-09-10 03:12:15,842 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-10 03:12:15,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-10 03:12:15,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2019-09-10 03:12:15,846 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 13 states. [2019-09-10 03:12:16,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 03:12:16,098 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-09-10 03:12:16,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-10 03:12:16,099 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 19 [2019-09-10 03:12:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 03:12:16,100 INFO L225 Difference]: With dead ends: 21 [2019-09-10 03:12:16,100 INFO L226 Difference]: Without dead ends: 0 [2019-09-10 03:12:16,101 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2019-09-10 03:12:16,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-10 03:12:16,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-10 03:12:16,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-10 03:12:16,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-10 03:12:16,103 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 19 [2019-09-10 03:12:16,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 03:12:16,103 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-10 03:12:16,103 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-10 03:12:16,103 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-10 03:12:16,104 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-10 03:12:16,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.09 03:12:16 BoogieIcfgContainer [2019-09-10 03:12:16,109 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-10 03:12:16,113 INFO L168 Benchmark]: Toolchain (without parser) took 4942.14 ms. Allocated memory was 135.8 MB in the beginning and 232.3 MB in the end (delta: 96.5 MB). Free memory was 91.7 MB in the beginning and 127.3 MB in the end (delta: -35.6 MB). Peak memory consumption was 60.9 MB. Max. memory is 7.1 GB. [2019-09-10 03:12:16,117 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 135.8 MB. Free memory was 110.2 MB in the beginning and 110.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. [2019-09-10 03:12:16,119 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.76 ms. Allocated memory is still 135.8 MB. Free memory was 91.3 MB in the beginning and 82.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. [2019-09-10 03:12:16,121 INFO L168 Benchmark]: Boogie Preprocessor took 113.15 ms. Allocated memory was 135.8 MB in the beginning and 202.4 MB in the end (delta: 66.6 MB). Free memory was 82.4 MB in the beginning and 180.0 MB in the end (delta: -97.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2019-09-10 03:12:16,122 INFO L168 Benchmark]: RCFGBuilder took 212.94 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 169.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-09-10 03:12:16,124 INFO L168 Benchmark]: TraceAbstraction took 4359.27 ms. Allocated memory was 202.4 MB in the beginning and 232.3 MB in the end (delta: 29.9 MB). Free memory was 168.6 MB in the beginning and 127.3 MB in the end (delta: 41.3 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. [2019-09-10 03:12:16,133 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 135.8 MB. Free memory was 110.2 MB in the beginning and 110.0 MB in the end (delta: 212.8 kB). Peak memory consumption was 212.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.76 ms. Allocated memory is still 135.8 MB. Free memory was 91.3 MB in the beginning and 82.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.15 ms. Allocated memory was 135.8 MB in the beginning and 202.4 MB in the end (delta: 66.6 MB). Free memory was 82.4 MB in the beginning and 180.0 MB in the end (delta: -97.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 212.94 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 169.2 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4359.27 ms. Allocated memory was 202.4 MB in the beginning and 232.3 MB in the end (delta: 29.9 MB). Free memory was 168.6 MB in the beginning and 127.3 MB in the end (delta: 41.3 MB). Peak memory consumption was 71.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 20 locations, 1 error locations. SAFE Result, 4.2s OverallTime, 2 OverallIterations, 2 TraceHistogramMax, 0.4s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 25 SDtfs, 13 SDslu, 82 SDs, 0 SdLazy, 89 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 59 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.2s AbstIntTime, 1 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.2s InterpolantComputationTime, 51 NumberOfCodeBlocks, 51 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 66 ConstructedInterpolants, 3 QuantifiedInterpolants, 12714 SizeOfPredicates, 9 NumberOfNonLiveVariables, 51 ConjunctsInSsa, 28 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 5/12 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...