/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/product-lines/email_spec1_product16.cil.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.24-6598664
[2019-11-24 04:53:18,499 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-24 04:53:18,502 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-11-24 04:53:18,523 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-24 04:53:18,525 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2019-11-24 04:53:18,552 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-24 04:53:18,553 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-24 04:53:18,555 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2019-11-24 04:53:18,568 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-24 04:53:18,569 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-24 04:53:18,569 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-24 04:53:18,572 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2019-11-24 04:53:18,572 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2019-11-24 04:53:18,576 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2019-11-24 04:53:18,582 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-24 04:53:18,584 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-11-24 04:53:18,585 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 04:53:18,612 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-24 04:53:18,612 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-24 04:53:18,613 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-11-24 04:53:18,613 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-11-24 04:53:18,613 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-11-24 04:53:18,614 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-11-24 04:53:18,614 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-11-24 04:53:18,614 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-11-24 04:53:18,614 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-11-24 04:53:18,614 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-11-24 04:53:18,615 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-11-24 04:53:18,615 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-11-24 04:53:18,615 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-11-24 04:53:18,615 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-11-24 04:53:18,615 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-11-24 04:53:18,616 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-24 04:53:18,616 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-24 04:53:18,617 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-24 04:53:18,617 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-24 04:53:18,617 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-24 04:53:18,617 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-24 04:53:18,617 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-24 04:53:18,617 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-24 04:53:18,618 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-24 04:53:18,618 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-24 04:53:18,618 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-24 04:53:18,618 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-24 04:53:18,618 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-24 04:53:18,619 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-24 04:53:18,619 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-24 04:53:18,619 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-24 04:53:18,619 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-24 04:53:18,619 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-24 04:53:18,620 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-11-24 04:53:18,620 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-24 04:53:18,620 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-24 04:53:18,620 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-24 04:53:18,620 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-11-24 04:53:18,930 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-24 04:53:18,941 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-24 04:53:18,944 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-24 04:53:18,946 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-24 04:53:18,946 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-24 04:53:18,947 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/product-lines/email_spec1_product16.cil.c
[2019-11-24 04:53:19,009 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abcbdaaa9/1971c733ce8649c6af4c45164b96d3f2/FLAG0eee79edf
[2019-11-24 04:53:19,637 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-24 04:53:19,638 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/product-lines/email_spec1_product16.cil.c
[2019-11-24 04:53:19,667 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abcbdaaa9/1971c733ce8649c6af4c45164b96d3f2/FLAG0eee79edf
[2019-11-24 04:53:19,859 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abcbdaaa9/1971c733ce8649c6af4c45164b96d3f2
[2019-11-24 04:53:19,867 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-24 04:53:19,869 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-24 04:53:19,870 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-24 04:53:19,870 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-24 04:53:19,874 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-24 04:53:19,875 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:53:19" (1/1) ...
[2019-11-24 04:53:19,878 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c442ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:19, skipping insertion in model container
[2019-11-24 04:53:19,878 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:53:19" (1/1) ...
[2019-11-24 04:53:19,885 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-24 04:53:19,968 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-24 04:53:20,699 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-24 04:53:20,714 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-24 04:53:20,828 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-24 04:53:20,928 INFO  L208         MainTranslator]: Completed translation
[2019-11-24 04:53:20,929 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20 WrapperNode
[2019-11-24 04:53:20,929 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-24 04:53:20,930 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-24 04:53:20,930 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-24 04:53:20,930 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-24 04:53:20,938 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (1/1) ...
[2019-11-24 04:53:20,968 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (1/1) ...
[2019-11-24 04:53:21,059 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-24 04:53:21,060 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-24 04:53:21,060 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-24 04:53:21,060 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-24 04:53:21,072 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (1/1) ...
[2019-11-24 04:53:21,072 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (1/1) ...
[2019-11-24 04:53:21,093 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (1/1) ...
[2019-11-24 04:53:21,093 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (1/1) ...
[2019-11-24 04:53:21,155 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (1/1) ...
[2019-11-24 04:53:21,176 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (1/1) ...
[2019-11-24 04:53:21,183 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (1/1) ...
[2019-11-24 04:53:21,197 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-24 04:53:21,198 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-24 04:53:21,198 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-24 04:53:21,198 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-24 04:53:21,199 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (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 04:53:21,291 INFO  L130     BoogieDeclarations]: Found specification of procedure puts
[2019-11-24 04:53:21,294 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2019-11-24 04:53:21,294 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2019-11-24 04:53:21,294 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-24 04:53:21,295 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-24 04:53:28,075 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-24 04:53:28,075 INFO  L284             CfgBuilder]: Removed 291 assume(true) statements.
[2019-11-24 04:53:28,077 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:53:28 BoogieIcfgContainer
[2019-11-24 04:53:28,077 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-24 04:53:28,078 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-24 04:53:28,078 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-24 04:53:28,082 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-24 04:53:28,082 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:53:19" (1/3) ...
[2019-11-24 04:53:28,083 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3559c4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:53:28, skipping insertion in model container
[2019-11-24 04:53:28,083 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:53:20" (2/3) ...
[2019-11-24 04:53:28,084 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3559c4c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:53:28, skipping insertion in model container
[2019-11-24 04:53:28,084 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:53:28" (3/3) ...
[2019-11-24 04:53:28,086 INFO  L109   eAbstractionObserver]: Analyzing ICFG email_spec1_product16.cil.c
[2019-11-24 04:53:28,095 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-24 04:53:28,102 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations.
[2019-11-24 04:53:28,114 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2019-11-24 04:53:28,136 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-24 04:53:28,137 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-24 04:53:28,137 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-24 04:53:28,137 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-24 04:53:28,137 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-24 04:53:28,137 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-24 04:53:28,137 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-24 04:53:28,137 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-24 04:53:28,151 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states.
[2019-11-24 04:53:28,157 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 8
[2019-11-24 04:53:28,157 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:28,158 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:28,159 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:28,165 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:28,165 INFO  L82        PathProgramCache]: Analyzing trace with hash 1405588785, now seen corresponding path program 1 times
[2019-11-24 04:53:28,172 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:28,173 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158978807]
[2019-11-24 04:53:28,173 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:28,399 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:28,526 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 04:53:28,526 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158978807]
[2019-11-24 04:53:28,527 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:53:28,527 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-24 04:53:28,528 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126181718]
[2019-11-24 04:53:28,532 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 2 states
[2019-11-24 04:53:28,532 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:53:28,542 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2019-11-24 04:53:28,542 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2019-11-24 04:53:28,544 INFO  L87              Difference]: Start difference. First operand 40 states. Second operand 2 states.
[2019-11-24 04:53:28,563 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:53:28,563 INFO  L93              Difference]: Finished difference Result 54 states and 87 transitions.
[2019-11-24 04:53:28,563 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2019-11-24 04:53:28,564 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 7
[2019-11-24 04:53:28,565 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:53:28,576 INFO  L225             Difference]: With dead ends: 54
[2019-11-24 04:53:28,576 INFO  L226             Difference]: Without dead ends: 37
[2019-11-24 04:53:28,580 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 04:53:28,599 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2019-11-24 04:53:28,617 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37.
[2019-11-24 04:53:28,618 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2019-11-24 04:53:28,620 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 60 transitions.
[2019-11-24 04:53:28,621 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 60 transitions. Word has length 7
[2019-11-24 04:53:28,622 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:53:28,622 INFO  L462      AbstractCegarLoop]: Abstraction has 37 states and 60 transitions.
[2019-11-24 04:53:28,622 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2019-11-24 04:53:28,622 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 60 transitions.
[2019-11-24 04:53:28,623 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2019-11-24 04:53:28,623 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:28,623 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:28,623 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:28,624 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:28,624 INFO  L82        PathProgramCache]: Analyzing trace with hash -1996407180, now seen corresponding path program 1 times
[2019-11-24 04:53:28,624 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:28,624 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335977039]
[2019-11-24 04:53:28,625 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:28,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:28,773 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 04:53:28,774 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335977039]
[2019-11-24 04:53:28,774 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:53:28,775 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-24 04:53:28,775 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52503523]
[2019-11-24 04:53:28,776 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-24 04:53:28,777 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:53:28,777 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-24 04:53:28,778 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:28,778 INFO  L87              Difference]: Start difference. First operand 37 states and 60 transitions. Second operand 3 states.
[2019-11-24 04:53:28,800 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:53:28,800 INFO  L93              Difference]: Finished difference Result 50 states and 74 transitions.
[2019-11-24 04:53:28,802 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-24 04:53:28,802 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 8
[2019-11-24 04:53:28,803 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:53:28,804 INFO  L225             Difference]: With dead ends: 50
[2019-11-24 04:53:28,804 INFO  L226             Difference]: Without dead ends: 39
[2019-11-24 04:53:28,805 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:28,806 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2019-11-24 04:53:28,815 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39.
[2019-11-24 04:53:28,816 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 39 states.
[2019-11-24 04:53:28,820 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 62 transitions.
[2019-11-24 04:53:28,820 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 62 transitions. Word has length 8
[2019-11-24 04:53:28,820 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:53:28,821 INFO  L462      AbstractCegarLoop]: Abstraction has 39 states and 62 transitions.
[2019-11-24 04:53:28,821 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-24 04:53:28,821 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 62 transitions.
[2019-11-24 04:53:28,822 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2019-11-24 04:53:28,823 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:28,823 INFO  L410         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:28,824 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:28,825 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:28,826 INFO  L82        PathProgramCache]: Analyzing trace with hash 1860219947, now seen corresponding path program 1 times
[2019-11-24 04:53:28,826 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:28,827 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427382999]
[2019-11-24 04:53:28,827 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:28,924 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:29,024 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-11-24 04:53:29,024 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427382999]
[2019-11-24 04:53:29,024 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:53:29,025 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-24 04:53:29,025 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466241157]
[2019-11-24 04:53:29,025 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-24 04:53:29,025 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:53:29,026 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-24 04:53:29,026 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:29,026 INFO  L87              Difference]: Start difference. First operand 39 states and 62 transitions. Second operand 3 states.
[2019-11-24 04:53:29,051 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:53:29,051 INFO  L93              Difference]: Finished difference Result 45 states and 67 transitions.
[2019-11-24 04:53:29,053 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-24 04:53:29,053 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 12
[2019-11-24 04:53:29,053 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:53:29,055 INFO  L225             Difference]: With dead ends: 45
[2019-11-24 04:53:29,055 INFO  L226             Difference]: Without dead ends: 36
[2019-11-24 04:53:29,055 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:29,056 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2019-11-24 04:53:29,063 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36.
[2019-11-24 04:53:29,063 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2019-11-24 04:53:29,064 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 58 transitions.
[2019-11-24 04:53:29,064 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states and 58 transitions. Word has length 12
[2019-11-24 04:53:29,065 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:53:29,065 INFO  L462      AbstractCegarLoop]: Abstraction has 36 states and 58 transitions.
[2019-11-24 04:53:29,065 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-24 04:53:29,065 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states and 58 transitions.
[2019-11-24 04:53:29,066 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2019-11-24 04:53:29,066 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:29,066 INFO  L410         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:29,067 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:29,067 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:29,067 INFO  L82        PathProgramCache]: Analyzing trace with hash 1357772793, now seen corresponding path program 1 times
[2019-11-24 04:53:29,067 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:29,068 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005807155]
[2019-11-24 04:53:29,068 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:29,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:29,405 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-11-24 04:53:29,405 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005807155]
[2019-11-24 04:53:29,406 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:53:29,406 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-11-24 04:53:29,406 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691685062]
[2019-11-24 04:53:29,409 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-11-24 04:53:29,410 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:53:29,410 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-11-24 04:53:29,410 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2019-11-24 04:53:29,411 INFO  L87              Difference]: Start difference. First operand 36 states and 58 transitions. Second operand 6 states.
[2019-11-24 04:53:29,782 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:53:29,782 INFO  L93              Difference]: Finished difference Result 68 states and 112 transitions.
[2019-11-24 04:53:29,784 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-11-24 04:53:29,784 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 15
[2019-11-24 04:53:29,784 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:53:29,785 INFO  L225             Difference]: With dead ends: 68
[2019-11-24 04:53:29,785 INFO  L226             Difference]: Without dead ends: 60
[2019-11-24 04:53:29,786 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2019-11-24 04:53:29,789 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2019-11-24 04:53:29,805 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58.
[2019-11-24 04:53:29,805 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2019-11-24 04:53:29,807 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 100 transitions.
[2019-11-24 04:53:29,807 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 100 transitions. Word has length 15
[2019-11-24 04:53:29,807 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:53:29,807 INFO  L462      AbstractCegarLoop]: Abstraction has 58 states and 100 transitions.
[2019-11-24 04:53:29,807 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-11-24 04:53:29,808 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 100 transitions.
[2019-11-24 04:53:29,808 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2019-11-24 04:53:29,809 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:29,809 INFO  L410         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:29,809 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:29,809 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:29,810 INFO  L82        PathProgramCache]: Analyzing trace with hash -2016873311, now seen corresponding path program 1 times
[2019-11-24 04:53:29,810 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:29,810 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587625997]
[2019-11-24 04:53:29,810 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:29,838 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:29,873 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-24 04:53:29,873 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587625997]
[2019-11-24 04:53:29,874 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:53:29,874 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-24 04:53:29,874 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741139250]
[2019-11-24 04:53:29,874 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-24 04:53:29,875 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:53:29,875 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-24 04:53:29,875 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:29,875 INFO  L87              Difference]: Start difference. First operand 58 states and 100 transitions. Second operand 3 states.
[2019-11-24 04:53:29,902 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:53:29,903 INFO  L93              Difference]: Finished difference Result 168 states and 292 transitions.
[2019-11-24 04:53:29,903 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-24 04:53:29,903 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 20
[2019-11-24 04:53:29,904 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:53:29,905 INFO  L225             Difference]: With dead ends: 168
[2019-11-24 04:53:29,905 INFO  L226             Difference]: Without dead ends: 112
[2019-11-24 04:53:29,906 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:29,906 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2019-11-24 04:53:29,919 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 104.
[2019-11-24 04:53:29,919 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 104 states.
[2019-11-24 04:53:29,921 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 185 transitions.
[2019-11-24 04:53:29,921 INFO  L78                 Accepts]: Start accepts. Automaton has 104 states and 185 transitions. Word has length 20
[2019-11-24 04:53:29,921 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:53:29,921 INFO  L462      AbstractCegarLoop]: Abstraction has 104 states and 185 transitions.
[2019-11-24 04:53:29,922 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-24 04:53:29,922 INFO  L276                IsEmpty]: Start isEmpty. Operand 104 states and 185 transitions.
[2019-11-24 04:53:29,923 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2019-11-24 04:53:29,923 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:29,923 INFO  L410         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:29,923 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:29,924 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:29,924 INFO  L82        PathProgramCache]: Analyzing trace with hash -1861369046, now seen corresponding path program 1 times
[2019-11-24 04:53:29,924 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:29,924 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461970681]
[2019-11-24 04:53:29,925 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:29,949 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:29,982 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-24 04:53:29,982 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461970681]
[2019-11-24 04:53:29,983 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:53:29,983 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-24 04:53:29,983 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748197410]
[2019-11-24 04:53:29,983 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-24 04:53:29,984 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:53:29,984 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-24 04:53:29,984 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:29,984 INFO  L87              Difference]: Start difference. First operand 104 states and 185 transitions. Second operand 3 states.
[2019-11-24 04:53:30,008 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:53:30,008 INFO  L93              Difference]: Finished difference Result 304 states and 543 transitions.
[2019-11-24 04:53:30,008 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-24 04:53:30,009 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2019-11-24 04:53:30,009 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:53:30,010 INFO  L225             Difference]: With dead ends: 304
[2019-11-24 04:53:30,011 INFO  L226             Difference]: Without dead ends: 202
[2019-11-24 04:53:30,012 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:30,013 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 202 states.
[2019-11-24 04:53:30,032 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194.
[2019-11-24 04:53:30,032 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 194 states.
[2019-11-24 04:53:30,034 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 349 transitions.
[2019-11-24 04:53:30,034 INFO  L78                 Accepts]: Start accepts. Automaton has 194 states and 349 transitions. Word has length 21
[2019-11-24 04:53:30,034 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:53:30,035 INFO  L462      AbstractCegarLoop]: Abstraction has 194 states and 349 transitions.
[2019-11-24 04:53:30,035 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-24 04:53:30,035 INFO  L276                IsEmpty]: Start isEmpty. Operand 194 states and 349 transitions.
[2019-11-24 04:53:30,036 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2019-11-24 04:53:30,037 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:30,037 INFO  L410         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:30,037 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:30,037 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:30,038 INFO  L82        PathProgramCache]: Analyzing trace with hash -228808433, now seen corresponding path program 1 times
[2019-11-24 04:53:30,038 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:30,038 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117729206]
[2019-11-24 04:53:30,038 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:30,063 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:30,097 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-24 04:53:30,098 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117729206]
[2019-11-24 04:53:30,098 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:53:30,098 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-24 04:53:30,098 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815009785]
[2019-11-24 04:53:30,099 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-24 04:53:30,099 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:53:30,099 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-24 04:53:30,100 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:30,100 INFO  L87              Difference]: Start difference. First operand 194 states and 349 transitions. Second operand 3 states.
[2019-11-24 04:53:30,130 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:53:30,131 INFO  L93              Difference]: Finished difference Result 570 states and 1027 transitions.
[2019-11-24 04:53:30,131 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-24 04:53:30,131 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2019-11-24 04:53:30,131 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:53:30,134 INFO  L225             Difference]: With dead ends: 570
[2019-11-24 04:53:30,134 INFO  L226             Difference]: Without dead ends: 378
[2019-11-24 04:53:30,135 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:30,137 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 378 states.
[2019-11-24 04:53:30,176 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 370.
[2019-11-24 04:53:30,176 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 370 states.
[2019-11-24 04:53:30,178 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 665 transitions.
[2019-11-24 04:53:30,179 INFO  L78                 Accepts]: Start accepts. Automaton has 370 states and 665 transitions. Word has length 22
[2019-11-24 04:53:30,179 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:53:30,179 INFO  L462      AbstractCegarLoop]: Abstraction has 370 states and 665 transitions.
[2019-11-24 04:53:30,179 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-24 04:53:30,179 INFO  L276                IsEmpty]: Start isEmpty. Operand 370 states and 665 transitions.
[2019-11-24 04:53:30,181 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2019-11-24 04:53:30,182 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:30,182 INFO  L410         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:30,182 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:30,182 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:30,183 INFO  L82        PathProgramCache]: Analyzing trace with hash -1763706452, now seen corresponding path program 1 times
[2019-11-24 04:53:30,183 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:30,183 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216034545]
[2019-11-24 04:53:30,183 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:30,208 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:30,242 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-24 04:53:30,243 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216034545]
[2019-11-24 04:53:30,243 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:53:30,243 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-24 04:53:30,244 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532239361]
[2019-11-24 04:53:30,244 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-24 04:53:30,244 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:53:30,244 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-24 04:53:30,245 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:30,245 INFO  L87              Difference]: Start difference. First operand 370 states and 665 transitions. Second operand 3 states.
[2019-11-24 04:53:30,299 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:53:30,300 INFO  L93              Difference]: Finished difference Result 1090 states and 1959 transitions.
[2019-11-24 04:53:30,300 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-24 04:53:30,300 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2019-11-24 04:53:30,300 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:53:30,304 INFO  L225             Difference]: With dead ends: 1090
[2019-11-24 04:53:30,305 INFO  L226             Difference]: Without dead ends: 722
[2019-11-24 04:53:30,306 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:30,307 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 722 states.
[2019-11-24 04:53:30,350 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 714.
[2019-11-24 04:53:30,351 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 714 states.
[2019-11-24 04:53:30,354 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 1273 transitions.
[2019-11-24 04:53:30,354 INFO  L78                 Accepts]: Start accepts. Automaton has 714 states and 1273 transitions. Word has length 23
[2019-11-24 04:53:30,354 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:53:30,354 INFO  L462      AbstractCegarLoop]: Abstraction has 714 states and 1273 transitions.
[2019-11-24 04:53:30,354 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-24 04:53:30,355 INFO  L276                IsEmpty]: Start isEmpty. Operand 714 states and 1273 transitions.
[2019-11-24 04:53:30,356 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2019-11-24 04:53:30,356 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:30,356 INFO  L410         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:30,357 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:30,357 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:30,357 INFO  L82        PathProgramCache]: Analyzing trace with hash 1584554336, now seen corresponding path program 1 times
[2019-11-24 04:53:30,357 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:30,358 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030642855]
[2019-11-24 04:53:30,358 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:30,382 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:30,415 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-24 04:53:30,415 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030642855]
[2019-11-24 04:53:30,415 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:53:30,415 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-24 04:53:30,416 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077724158]
[2019-11-24 04:53:30,416 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-24 04:53:30,416 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:53:30,416 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-24 04:53:30,417 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:30,417 INFO  L87              Difference]: Start difference. First operand 714 states and 1273 transitions. Second operand 3 states.
[2019-11-24 04:53:30,517 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:53:30,517 INFO  L93              Difference]: Finished difference Result 2106 states and 3751 transitions.
[2019-11-24 04:53:30,518 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-24 04:53:30,518 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 24
[2019-11-24 04:53:30,518 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:53:30,526 INFO  L225             Difference]: With dead ends: 2106
[2019-11-24 04:53:30,527 INFO  L226             Difference]: Without dead ends: 1394
[2019-11-24 04:53:30,528 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:53:30,530 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1394 states.
[2019-11-24 04:53:30,626 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 1386.
[2019-11-24 04:53:30,627 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1386 states.
[2019-11-24 04:53:30,632 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2441 transitions.
[2019-11-24 04:53:30,632 INFO  L78                 Accepts]: Start accepts. Automaton has 1386 states and 2441 transitions. Word has length 24
[2019-11-24 04:53:30,633 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:53:30,633 INFO  L462      AbstractCegarLoop]: Abstraction has 1386 states and 2441 transitions.
[2019-11-24 04:53:30,633 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-24 04:53:30,633 INFO  L276                IsEmpty]: Start isEmpty. Operand 1386 states and 2441 transitions.
[2019-11-24 04:53:30,634 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2019-11-24 04:53:30,635 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:53:30,635 INFO  L410         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:53:30,635 INFO  L410      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:53:30,635 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:53:30,636 INFO  L82        PathProgramCache]: Analyzing trace with hash -180703843, now seen corresponding path program 1 times
[2019-11-24 04:53:30,636 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:53:30,636 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519642730]
[2019-11-24 04:53:30,636 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:53:30,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:30,882 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 04:53:30,883 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519642730]
[2019-11-24 04:53:30,883 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966348933]
[2019-11-24 04:53:30,883 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 04:53:31,214 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:53:31,220 INFO  L255         TraceCheckSpWp]: Trace formula consists of 926 conjuncts, 3 conjunts are in the unsatisfiable core
[2019-11-24 04:53:31,229 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-24 04:53:31,261 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 04:53:31,262 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-24 04:53:31,298 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 04:53:31,298 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264278562]
[2019-11-24 04:53:31,349 INFO  L159        IcfgInterpreter]: Started Sifa with 24 locations of interest
[2019-11-24 04:53:31,349 INFO  L166        IcfgInterpreter]: Building call graph
[2019-11-24 04:53:31,362 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-11-24 04:53:31,372 INFO  L176        IcfgInterpreter]: Starting interpretation
[2019-11-24 04:53:31,373 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-11-24 04:54:00,466 WARN  L192               SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 656
[2019-11-24 04:54:03,580 WARN  L192               SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 274 DAG size of output: 223
[2019-11-24 04:54:03,924 WARN  L192               SmtUtils]: Spent 333.00 ms on a formula simplification that was a NOOP. DAG size: 691
[2019-11-24 04:54:06,353 WARN  L192               SmtUtils]: Spent 1.76 s on a formula simplification that was a NOOP. DAG size: 1116
[2019-11-24 04:54:48,242 WARN  L177   XnfTransformerHelper]: Simplifying disjunction of 14400 conjuctions. This might take some time...