/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loop-lit/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:20:53,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:20:53,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:20:53,526 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:20:53,591 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:20:53,625 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:20:53,625 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:20:53,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:20:53,629 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:20:53,629 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:20:53,629 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:20:53,629 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:20:53,630 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:20:53,630 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:20:53,630 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:20:53,630 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:20:53,630 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:20:53,631 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:20:53,631 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:20:53,631 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:20:53,632 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:20:53,633 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:20:53,633 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:20:53,633 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:20:53,634 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:20:53,634 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:20:53,634 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:20:53,634 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:20:53,634 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:20:53,634 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:20:53,635 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:20:53,635 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:20:53,635 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:20:53,636 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:20:53,636 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:20:53,636 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:20:53,636 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:20:53,636 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:20:53,636 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:20:53,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:20:53,637 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:20:53,637 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:20:53,637 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:20:53,906 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:20:53,922 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:20:53,927 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:20:53,929 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:20:53,929 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:20:53,930 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-11-24 04:20:53,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d496cecf5/bbf0fc450cbc4184a536feb863b8673e/FLAGa9f6cbd69 [2019-11-24 04:20:54,450 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:20:54,450 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2019-11-24 04:20:54,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d496cecf5/bbf0fc450cbc4184a536feb863b8673e/FLAGa9f6cbd69 [2019-11-24 04:20:54,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d496cecf5/bbf0fc450cbc4184a536feb863b8673e [2019-11-24 04:20:54,886 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:20:54,888 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:20:54,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:20:54,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:20:54,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:20:54,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:20:54" (1/1) ... [2019-11-24 04:20:54,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41892a68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:54, skipping insertion in model container [2019-11-24 04:20:54,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:20:54" (1/1) ... [2019-11-24 04:20:54,904 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:20:54,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:20:55,088 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:20:55,092 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:20:55,110 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:20:55,125 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:20:55,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55 WrapperNode [2019-11-24 04:20:55,126 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:20:55,126 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:20:55,126 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:20:55,127 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:20:55,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (1/1) ... [2019-11-24 04:20:55,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (1/1) ... [2019-11-24 04:20:55,240 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:20:55,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:20:55,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:20:55,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:20:55,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (1/1) ... [2019-11-24 04:20:55,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (1/1) ... [2019-11-24 04:20:55,252 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (1/1) ... [2019-11-24 04:20:55,252 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (1/1) ... [2019-11-24 04:20:55,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (1/1) ... [2019-11-24 04:20:55,264 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (1/1) ... [2019-11-24 04:20:55,265 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (1/1) ... [2019-11-24 04:20:55,266 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:20:55,267 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:20:55,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:20:55,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:20:55,268 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (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 [2019-11-24 04:20:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:20:55,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:20:55,575 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:20:55,575 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:20:55,577 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:20:55 BoogieIcfgContainer [2019-11-24 04:20:55,577 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:20:55,578 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:20:55,578 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:20:55,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:20:55,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:20:54" (1/3) ... [2019-11-24 04:20:55,582 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af87440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:20:55, skipping insertion in model container [2019-11-24 04:20:55,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:55" (2/3) ... [2019-11-24 04:20:55,583 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af87440 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:20:55, skipping insertion in model container [2019-11-24 04:20:55,583 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:20:55" (3/3) ... [2019-11-24 04:20:55,585 INFO L109 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2019-11-24 04:20:55,595 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:20:55,603 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:20:55,617 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:20:55,650 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:20:55,650 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:20:55,650 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:20:55,651 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:20:55,651 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:20:55,651 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:20:55,651 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:20:55,651 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:20:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-24 04:20:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:20:55,676 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:20:55,677 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:20:55,678 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:20:55,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:20:55,684 INFO L82 PathProgramCache]: Analyzing trace with hash 74624566, now seen corresponding path program 1 times [2019-11-24 04:20:55,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:20:55,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048404268] [2019-11-24 04:20:55,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:20:55,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:20:55,798 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048404268] [2019-11-24 04:20:55,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:20:55,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:20:55,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885446005] [2019-11-24 04:20:55,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:20:55,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:20:55,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:20:55,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:20:55,822 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2019-11-24 04:20:55,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:20:55,839 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-11-24 04:20:55,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:20:55,840 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-24 04:20:55,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:20:55,847 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:20:55,847 INFO L226 Difference]: Without dead ends: 7 [2019-11-24 04:20:55,851 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:20:55,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-24 04:20:55,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-24 04:20:55,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 04:20:55,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-24 04:20:55,882 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-24 04:20:55,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:20:55,883 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-24 04:20:55,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:20:55,883 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-24 04:20:55,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:20:55,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:20:55,884 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:20:55,884 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:20:55,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:20:55,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1994031509, now seen corresponding path program 1 times [2019-11-24 04:20:55,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:20:55,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795029344] [2019-11-24 04:20:55,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:20:55,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:56,091 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 17 [2019-11-24 04:20:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:20:56,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795029344] [2019-11-24 04:20:56,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:20:56,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:20:56,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116984710] [2019-11-24 04:20:56,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:20:56,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:20:56,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:20:56,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:20:56,106 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2019-11-24 04:20:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:20:56,157 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-11-24 04:20:56,158 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:20:56,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-24 04:20:56,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:20:56,159 INFO L225 Difference]: With dead ends: 13 [2019-11-24 04:20:56,159 INFO L226 Difference]: Without dead ends: 9 [2019-11-24 04:20:56,160 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:20:56,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-24 04:20:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-24 04:20:56,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:20:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-24 04:20:56,164 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-24 04:20:56,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:20:56,164 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-24 04:20:56,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:20:56,165 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-24 04:20:56,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:20:56,166 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:20:56,166 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-24 04:20:56,166 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:20:56,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:20:56,167 INFO L82 PathProgramCache]: Analyzing trace with hash 334202339, now seen corresponding path program 1 times [2019-11-24 04:20:56,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:20:56,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974282420] [2019-11-24 04:20:56,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:20:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:20:56,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974282420] [2019-11-24 04:20:56,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600266819] [2019-11-24 04:20:56,408 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:20:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:56,443 WARN L253 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-24 04:20:56,448 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:20:56,543 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:20:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:20:56,564 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:20:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:20:56,628 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2136368106] [2019-11-24 04:20:56,665 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-24 04:20:56,665 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:20:56,692 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:20:56,704 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:20:56,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:20:57,916 WARN L192 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 501 DAG size of output: 493 [2019-11-24 04:20:58,516 WARN L192 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 477 DAG size of output: 477 [2019-11-24 04:20:59,246 WARN L192 SmtUtils]: Spent 598.00 ms on a formula simplification. DAG size of input: 947 DAG size of output: 939 [2019-11-24 04:21:01,291 WARN L192 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 933 DAG size of output: 932 [2019-11-24 04:21:03,031 WARN L192 SmtUtils]: Spent 1.60 s on a formula simplification. DAG size of input: 1797 DAG size of output: 1782 [2019-11-24 04:21:05,406 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5290 conjuctions. This might take some time... [2019-11-24 04:21:11,088 WARN L192 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 1780 DAG size of output: 1779 [2019-11-24 04:21:17,443 WARN L192 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 5118 DAG size of output: 5097 [2019-11-24 04:21:22,629 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 9360 conjuctions. This might take some time... [2019-11-24 04:21:44,050 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 5184 conjuctions. This might take some time... [2019-11-24 04:21:47,484 WARN L177 XnfTransformerHelper]: Simplifying disjunction of 11820 conjuctions. This might take some time... [2019-11-24 04:22:11,547 WARN L192 SmtUtils]: Spent 4.86 s on a formula simplification. DAG size of input: 5067 DAG size of output: 5067