/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/mcmillan2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:23:10,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:23:10,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:23:10,319 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:23:10,372 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 04:23:10,387 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:23:10,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:23:10,388 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:23:10,390 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:23:10,390 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:23:10,391 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:23:10,391 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:23:10,391 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:23:10,391 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:23:10,391 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:23:10,392 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:23:10,393 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:23:10,393 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:23:10,393 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:23:10,393 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:23:10,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:23:10,395 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:23:10,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:23:10,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:23:10,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:23:10,396 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:23:10,396 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:23:10,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:23:10,397 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:23:10,397 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:23:10,397 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:23:10,397 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:23:10,398 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:23:10,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:23:10,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:23:10,399 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:23:10,399 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:23:10,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:23:10,400 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:23:10,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:23:10,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:23:10,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:23:10,401 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:23:10,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:23:10,715 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:23:10,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:23:10,720 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:23:10,720 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:23:10,721 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/mcmillan2006.i [2019-11-24 04:23:10,789 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d71852ae5/d6cd5320cdec40c996f7f1d9044561bd/FLAG50699ba8f [2019-11-24 04:23:11,223 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:23:11,224 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/mcmillan2006.i [2019-11-24 04:23:11,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d71852ae5/d6cd5320cdec40c996f7f1d9044561bd/FLAG50699ba8f [2019-11-24 04:23:11,618 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d71852ae5/d6cd5320cdec40c996f7f1d9044561bd [2019-11-24 04:23:11,629 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:23:11,631 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:23:11,632 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:23:11,632 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:23:11,636 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:23:11,637 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:11,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@252961a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11, skipping insertion in model container [2019-11-24 04:23:11,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:11,648 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:23:11,666 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:23:11,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:23:11,876 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:23:11,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:23:11,909 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:23:11,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11 WrapperNode [2019-11-24 04:23:11,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:23:11,911 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:23:11,911 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:23:11,911 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:23:11,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:12,000 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:12,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:23:12,020 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:23:12,020 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:23:12,020 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:23:12,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:12,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:12,031 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:12,031 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:12,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:12,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:12,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (1/1) ... [2019-11-24 04:23:12,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:23:12,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:23:12,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:23:12,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:23:12,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (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 [2019-11-24 04:23:12,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:23:12,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:23:12,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:23:12,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:23:12,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:23:12,413 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:23:12,414 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-11-24 04:23:12,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:23:12 BoogieIcfgContainer [2019-11-24 04:23:12,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:23:12,416 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:23:12,416 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:23:12,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:23:12,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:23:11" (1/3) ... [2019-11-24 04:23:12,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306e44f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:23:12, skipping insertion in model container [2019-11-24 04:23:12,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:23:11" (2/3) ... [2019-11-24 04:23:12,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@306e44f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:23:12, skipping insertion in model container [2019-11-24 04:23:12,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:23:12" (3/3) ... [2019-11-24 04:23:12,424 INFO L109 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2019-11-24 04:23:12,433 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:23:12,440 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:23:12,449 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:23:12,467 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:23:12,467 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:23:12,468 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:23:12,468 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:23:12,468 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:23:12,468 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:23:12,468 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:23:12,468 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:23:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2019-11-24 04:23:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:23:12,485 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:23:12,486 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:23:12,487 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:23:12,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:23:12,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1939244867, now seen corresponding path program 1 times [2019-11-24 04:23:12,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:23:12,500 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030376115] [2019-11-24 04:23:12,501 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:23:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:23:12,685 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 04:23:12,685 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030376115] [2019-11-24 04:23:12,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:23:12,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:23:12,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742927648] [2019-11-24 04:23:12,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:23:12,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:23:12,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:23:12,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:23:12,709 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 4 states. [2019-11-24 04:23:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:23:12,787 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2019-11-24 04:23:12,787 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:23:12,789 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-24 04:23:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:23:12,799 INFO L225 Difference]: With dead ends: 21 [2019-11-24 04:23:12,800 INFO L226 Difference]: Without dead ends: 9 [2019-11-24 04:23:12,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:23:12,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-24 04:23:12,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-24 04:23:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:23:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2019-11-24 04:23:12,837 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2019-11-24 04:23:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:23:12,838 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2019-11-24 04:23:12,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:23:12,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2019-11-24 04:23:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:23:12,839 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:23:12,839 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:23:12,839 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:23:12,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:23:12,840 INFO L82 PathProgramCache]: Analyzing trace with hash 11875880, now seen corresponding path program 1 times [2019-11-24 04:23:12,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:23:12,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126033888] [2019-11-24 04:23:12,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:23:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:23:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:23:13,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126033888] [2019-11-24 04:23:13,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310728593] [2019-11-24 04:23:13,040 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 04:23:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:23:13,084 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-24 04:23:13,089 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:23:13,155 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-24 04:23:13,155 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-24 04:23:13,159 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:23:13,160 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:23:13,160 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-24 04:23:13,198 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:23:13,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:23:13,217 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:23:13,250 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2019-11-24 04:23:13,258 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2019-11-24 04:23:13,259 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-24 04:23:13,262 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:23:13,262 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-24 04:23:13,266 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-24 04:23:13,266 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-24 04:23:13,267 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:14, output treesize:7 [2019-11-24 04:23:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:23:13,279 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [968844930] [2019-11-24 04:23:13,305 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-24 04:23:13,305 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:23:13,312 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:23:13,319 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:23:13,319 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:23:15,082 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 122 [2019-11-24 04:23:50,127 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 259 [2019-11-24 04:23:50,261 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 258 [2019-11-24 04:23:58,997 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 281 DAG size of output: 276 [2019-11-24 04:24:17,334 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2019-11-24 04:24:17,503 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 314 DAG size of output: 312 [2019-11-24 04:24:24,665 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 322 DAG size of output: 320 [2019-11-24 04:24:26,727 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 328 DAG size of output: 327 [2019-11-24 04:24:29,102 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 326 DAG size of output: 325 [2019-11-24 04:24:33,728 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 338 DAG size of output: 334 [2019-11-24 04:24:36,167 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 349 [2019-11-24 04:24:36,328 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 350 DAG size of output: 348 [2019-11-24 04:24:36,561 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 351 DAG size of output: 351 [2019-11-24 04:24:38,928 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2019-11-24 04:24:39,050 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 355 [2019-11-24 04:24:41,638 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2019-11-24 04:24:41,763 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 359 DAG size of output: 355 [2019-11-24 04:24:41,905 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 355 [2019-11-24 04:24:42,013 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 356