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/fibo_10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-10 02:52:15,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-10 02:52:15,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-10 02:52:15,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-10 02:52:15,536 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 02:52:15,574 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-10 02:52:15,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-10 02:52:15,575 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-10 02:52:15,575 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-10 02:52:15,576 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-10 02:52:15,576 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-10 02:52:15,576 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-10 02:52:15,576 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-10 02:52:15,577 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-10 02:52:15,577 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-10 02:52:15,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-10 02:52:15,578 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-10 02:52:15,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-10 02:52:15,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-10 02:52:15,578 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-10 02:52:15,578 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-10 02:52:15,579 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-10 02:52:15,579 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-10 02:52:15,579 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-10 02:52:15,579 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-10 02:52:15,579 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-10 02:52:15,580 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-10 02:52:15,580 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-10 02:52:15,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-10 02:52:15,580 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-10 02:52:15,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-10 02:52:15,581 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-10 02:52:15,581 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-10 02:52:15,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-10 02:52:15,581 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-10 02:52:15,610 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-10 02:52:15,623 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-10 02:52:15,626 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-10 02:52:15,627 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-10 02:52:15,628 INFO L275 PluginConnector]: CDTParser initialized [2019-09-10 02:52:15,629 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_10-1.c [2019-09-10 02:52:15,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d0fc3a6/33c9dfd9402c4901a1392133edca28ce/FLAG1407b83e1 [2019-09-10 02:52:16,114 INFO L306 CDTParser]: Found 1 translation units. [2019-09-10 02:52:16,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_10-1.c [2019-09-10 02:52:16,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d0fc3a6/33c9dfd9402c4901a1392133edca28ce/FLAG1407b83e1 [2019-09-10 02:52:16,526 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81d0fc3a6/33c9dfd9402c4901a1392133edca28ce [2019-09-10 02:52:16,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-10 02:52:16,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-10 02:52:16,538 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-10 02:52:16,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-10 02:52:16,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-10 02:52:16,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:52:16" (1/1) ... [2019-09-10 02:52:16,546 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22725a14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16, skipping insertion in model container [2019-09-10 02:52:16,546 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.09 02:52:16" (1/1) ... [2019-09-10 02:52:16,554 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-10 02:52:16,571 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-10 02:52:16,768 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:52:16,772 INFO L188 MainTranslator]: Completed pre-run [2019-09-10 02:52:16,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-10 02:52:16,799 INFO L192 MainTranslator]: Completed translation [2019-09-10 02:52:16,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16 WrapperNode [2019-09-10 02:52:16,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-10 02:52:16,800 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-10 02:52:16,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-10 02:52:16,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-10 02:52:16,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16" (1/1) ... [2019-09-10 02:52:16,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16" (1/1) ... [2019-09-10 02:52:16,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16" (1/1) ... [2019-09-10 02:52:16,917 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16" (1/1) ... [2019-09-10 02:52:16,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16" (1/1) ... [2019-09-10 02:52:16,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16" (1/1) ... [2019-09-10 02:52:16,923 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16" (1/1) ... [2019-09-10 02:52:16,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-10 02:52:16,925 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-10 02:52:16,925 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-10 02:52:16,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-10 02:52:16,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16" (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 02:52:16,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-10 02:52:16,985 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-10 02:52:16,985 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo [2019-09-10 02:52:16,985 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-10 02:52:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-10 02:52:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-10 02:52:16,985 INFO L130 BoogieDeclarations]: Found specification of procedure fibo [2019-09-10 02:52:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-10 02:52:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-10 02:52:16,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-10 02:52:17,143 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-10 02:52:17,143 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-10 02:52:17,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:52:17 BoogieIcfgContainer [2019-09-10 02:52:17,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-10 02:52:17,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-10 02:52:17,146 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-10 02:52:17,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-10 02:52:17,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.09 02:52:16" (1/3) ... [2019-09-10 02:52:17,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aebedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:52:17, skipping insertion in model container [2019-09-10 02:52:17,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.09 02:52:16" (2/3) ... [2019-09-10 02:52:17,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aebedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.09 02:52:17, skipping insertion in model container [2019-09-10 02:52:17,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.09 02:52:17" (3/3) ... [2019-09-10 02:52:17,153 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_10-1.c [2019-09-10 02:52:17,163 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-10 02:52:17,171 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-10 02:52:17,188 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-10 02:52:17,216 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-10 02:52:17,217 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-10 02:52:17,217 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-10 02:52:17,217 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-10 02:52:17,217 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-10 02:52:17,218 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-10 02:52:17,218 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-10 02:52:17,218 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-10 02:52:17,234 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-09-10 02:52:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-10 02:52:17,244 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:52:17,245 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:52:17,248 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:52:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:52:17,254 INFO L82 PathProgramCache]: Analyzing trace with hash 537028541, now seen corresponding path program 1 times [2019-09-10 02:52:17,256 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:52:17,302 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:17,302 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:52:17,303 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:17,303 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:52:17,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:52:17,438 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 02:52:17,440 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:52:17,440 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 02:52:17,441 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:52:17,445 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:52:17,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:52:17,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:52:17,466 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 5 states. [2019-09-10 02:52:17,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:52:17,676 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-09-10 02:52:17,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:52:17,678 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-10 02:52:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:52:17,687 INFO L225 Difference]: With dead ends: 26 [2019-09-10 02:52:17,687 INFO L226 Difference]: Without dead ends: 21 [2019-09-10 02:52:17,689 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-10 02:52:17,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-09-10 02:52:17,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-09-10 02:52:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-10 02:52:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-10 02:52:17,734 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 13 [2019-09-10 02:52:17,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:52:17,734 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-10 02:52:17,734 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:52:17,735 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-10 02:52:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-10 02:52:17,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:52:17,737 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:52:17,738 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:52:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:52:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash 179123823, now seen corresponding path program 1 times [2019-09-10 02:52:17,739 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:52:17,741 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:17,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:52:17,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:17,742 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:52:17,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:52:17,786 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 02:52:17,786 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-10 02:52:17,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-10 02:52:17,787 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:52:17,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-10 02:52:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-10 02:52:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:52:17,790 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 5 states. [2019-09-10 02:52:17,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:52:17,812 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2019-09-10 02:52:17,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-10 02:52:17,813 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-10 02:52:17,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:52:17,814 INFO L225 Difference]: With dead ends: 25 [2019-09-10 02:52:17,815 INFO L226 Difference]: Without dead ends: 23 [2019-09-10 02:52:17,816 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-10 02:52:17,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-09-10 02:52:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2019-09-10 02:52:17,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-10 02:52:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-09-10 02:52:17,823 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2019-09-10 02:52:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:52:17,824 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-09-10 02:52:17,824 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-10 02:52:17,824 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-09-10 02:52:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-10 02:52:17,825 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:52:17,826 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:52:17,826 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:52:17,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:52:17,826 INFO L82 PathProgramCache]: Analyzing trace with hash 806022394, now seen corresponding path program 1 times [2019-09-10 02:52:17,827 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:52:17,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:17,828 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:52:17,828 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:17,828 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:52:17,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:52:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-10 02:52:17,932 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:52:17,933 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:52:17,934 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 27 with the following transitions: [2019-09-10 02:52:17,936 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2019-09-10 02:52:17,976 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:52:17,976 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-10 02:52:18,600 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-10 02:52:18,604 INFO L272 AbstractInterpreter]: Visited 17 different actions 1850 times. Merged at 2 different actions 42 times. Widened at 2 different actions 184 times. Performed 1867 root evaluator evaluations with a maximum evaluation depth of 3. Performed 1867 inverse root evaluator evaluations with a maximum inverse evaluation depth of 3. Found 122 fixpoints after 3 different actions. Largest state had 5 variables. [2019-09-10 02:52:18,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:52:18,607 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-10 02:52:18,647 INFO L227 lantSequenceWeakener]: Weakened 9 states. On average, predicates are now at 42.59% of their original sizes. [2019-09-10 02:52:18,647 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-10 02:52:18,744 INFO L420 sIntCurrentIteration]: We unified 25 AI predicates to 25 [2019-09-10 02:52:18,745 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-10 02:52:18,746 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-10 02:52:18,746 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-09-10 02:52:18,746 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:52:18,747 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-10 02:52:18,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-10 02:52:18,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-09-10 02:52:18,748 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 11 states. [2019-09-10 02:52:19,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:52:19,279 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-09-10 02:52:19,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-10 02:52:19,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2019-09-10 02:52:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:52:19,282 INFO L225 Difference]: With dead ends: 48 [2019-09-10 02:52:19,282 INFO L226 Difference]: Without dead ends: 48 [2019-09-10 02:52:19,282 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2019-09-10 02:52:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-09-10 02:52:19,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-09-10 02:52:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-09-10 02:52:19,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-09-10 02:52:19,295 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2019-09-10 02:52:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:52:19,295 INFO L475 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-09-10 02:52:19,295 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-10 02:52:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-09-10 02:52:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-09-10 02:52:19,300 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:52:19,301 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:52:19,303 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:52:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:52:19,303 INFO L82 PathProgramCache]: Analyzing trace with hash -767819153, now seen corresponding path program 2 times [2019-09-10 02:52:19,303 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:52:19,305 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:19,305 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-10 02:52:19,306 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:19,306 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:52:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:52:19,476 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 30 proven. 39 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-09-10 02:52:19,476 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:52:19,477 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:52:19,477 INFO L189 CegarAbsIntRunner]: Skipping current iteration for AI because we have already analyzed this path program [2019-09-10 02:52:19,478 INFO L422 seRefinementStrategy]: Interpolation failed due to KNOWN_IGNORE: AbsInt can only provide a hoare triple checker if it generated fixpoints [2019-09-10 02:52:19,479 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:52:19,479 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 [2019-09-10 02:52:19,506 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-10 02:52:19,507 INFO L289 anRefinementStrategy]: Using traceCheck mode Z3_IG with AssertCodeBlockOrder OUTSIDE_LOOP_FIRST2 (IT: FPandBP) [2019-09-10 02:52:19,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-10 02:52:19,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-10 02:52:19,544 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-10 02:52:19,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-10 02:52:19,623 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-09-10 02:52:19,624 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-09-10 02:52:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 61 proven. 3 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2019-09-10 02:52:19,853 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-09-10 02:52:19,855 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 7 [2019-09-10 02:52:19,855 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-10 02:52:19,856 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-10 02:52:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-10 02:52:19,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-09-10 02:52:19,857 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 6 states. [2019-09-10 02:52:19,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-10 02:52:19,969 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2019-09-10 02:52:19,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-10 02:52:19,970 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2019-09-10 02:52:19,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-10 02:52:19,972 INFO L225 Difference]: With dead ends: 50 [2019-09-10 02:52:19,972 INFO L226 Difference]: Without dead ends: 50 [2019-09-10 02:52:19,973 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 127 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-09-10 02:52:19,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-09-10 02:52:19,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2019-09-10 02:52:19,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-10 02:52:19,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2019-09-10 02:52:19,982 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 65 [2019-09-10 02:52:19,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-10 02:52:19,983 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2019-09-10 02:52:19,983 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-10 02:52:19,983 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2019-09-10 02:52:19,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-10 02:52:19,985 INFO L391 BasicCegarLoop]: Found error trace [2019-09-10 02:52:19,986 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 6, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-10 02:52:19,986 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-10 02:52:19,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-10 02:52:19,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1437629917, now seen corresponding path program 1 times [2019-09-10 02:52:19,988 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-10 02:52:19,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:19,989 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-10 02:52:19,989 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-10 02:52:19,990 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-10 02:52:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-10 02:52:20,235 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 65 proven. 39 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-10 02:52:20,235 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-10 02:52:20,235 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-10 02:52:20,235 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 68 with the following transitions: [2019-09-10 02:52:20,236 INFO L207 CegarAbsIntRunner]: [0], [4], [6], [9], [11], [18], [21], [22], [25], [26], [28], [30], [31], [32], [33], [34], [36], [37], [38], [39], [40], [41] [2019-09-10 02:52:20,239 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-10 02:52:20,240 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)