/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/list-simple/sll2c_remove_all.i


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


This is Ultimate 0.1.24-6598664
[2019-11-24 04:10:34,484 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-24 04:10:34,515 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2019-11-24 04:10:34,531 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-24 04:10:34,534 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 04:10:34,549 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-24 04:10:34,549 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-24 04:10:34,550 INFO  L136        SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults:
[2019-11-24 04:10:34,550 INFO  L138        SettingsManager]:  * User list type=DISABLED
[2019-11-24 04:10:34,550 INFO  L136        SettingsManager]: Preferences of Abstract Interpretation differ from their defaults:
[2019-11-24 04:10:34,550 INFO  L138        SettingsManager]:  * Explicit value domain=true
[2019-11-24 04:10:34,551 INFO  L138        SettingsManager]:  * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain
[2019-11-24 04:10:34,551 INFO  L138        SettingsManager]:  * Octagon Domain=false
[2019-11-24 04:10:34,551 INFO  L138        SettingsManager]:  * Abstract domain=CompoundDomain
[2019-11-24 04:10:34,551 INFO  L138        SettingsManager]:  * Check feasibility of abstract posts with an SMT solver=true
[2019-11-24 04:10:34,551 INFO  L138        SettingsManager]:  * Use the RCFG-of-the-future interface=true
[2019-11-24 04:10:34,551 INFO  L138        SettingsManager]:  * Interval Domain=false
[2019-11-24 04:10:34,552 INFO  L136        SettingsManager]: Preferences of Sifa differ from their defaults:
[2019-11-24 04:10:34,552 INFO  L138        SettingsManager]:  * Call Summarizer=TopInputCallSummarizer
[2019-11-24 04:10:34,552 INFO  L138        SettingsManager]:  * Simplification Technique=SIMPLIFY_QUICK
[2019-11-24 04:10:34,553 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-24 04:10:34,553 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-24 04:10:34,553 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-24 04:10:34,553 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-24 04:10:34,554 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-24 04:10:34,554 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-24 04:10:34,554 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-24 04:10:34,554 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-24 04:10:34,554 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-24 04:10:34,554 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-24 04:10:34,555 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-24 04:10:34,555 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-24 04:10:34,555 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-24 04:10:34,555 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-24 04:10:34,555 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-24 04:10:34,556 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-24 04:10:34,556 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-24 04:10:34,556 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-24 04:10:34,556 INFO  L138        SettingsManager]:  * Trace refinement strategy=SIFA_TAIPAN
[2019-11-24 04:10:34,556 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-24 04:10:34,557 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-24 04:10:34,557 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-24 04:10:34,557 INFO  L138        SettingsManager]:  * Abstract interpretation Mode=USE_PREDICATES
[2019-11-24 04:10:34,831 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-24 04:10:34,840 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-24 04:10:34,847 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-24 04:10:34,849 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-24 04:10:34,849 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-24 04:10:34,850 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-simple/sll2c_remove_all.i
[2019-11-24 04:10:34,926 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea060383/1579c1938bc84842a77e42518eb7e03f/FLAGf09c47790
[2019-11-24 04:10:35,469 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-24 04:10:35,470 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-simple/sll2c_remove_all.i
[2019-11-24 04:10:35,490 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea060383/1579c1938bc84842a77e42518eb7e03f/FLAGf09c47790
[2019-11-24 04:10:35,759 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ea060383/1579c1938bc84842a77e42518eb7e03f
[2019-11-24 04:10:35,768 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-24 04:10:35,770 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2019-11-24 04:10:35,770 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-24 04:10:35,771 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-24 04:10:35,774 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-24 04:10:35,775 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:10:35" (1/1) ...
[2019-11-24 04:10:35,778 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20645e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:35, skipping insertion in model container
[2019-11-24 04:10:35,778 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:10:35" (1/1) ...
[2019-11-24 04:10:35,786 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-24 04:10:35,832 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2019-11-24 04:10:36,220 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-24 04:10:36,232 INFO  L203         MainTranslator]: Completed pre-run
[2019-11-24 04:10:36,293 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-24 04:10:36,353 INFO  L208         MainTranslator]: Completed translation
[2019-11-24 04:10:36,354 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36 WrapperNode
[2019-11-24 04:10:36,354 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-24 04:10:36,355 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2019-11-24 04:10:36,355 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2019-11-24 04:10:36,355 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2019-11-24 04:10:36,364 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (1/1) ...
[2019-11-24 04:10:36,387 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (1/1) ...
[2019-11-24 04:10:36,423 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2019-11-24 04:10:36,424 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-24 04:10:36,424 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-24 04:10:36,424 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-24 04:10:36,433 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (1/1) ...
[2019-11-24 04:10:36,433 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (1/1) ...
[2019-11-24 04:10:36,437 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (1/1) ...
[2019-11-24 04:10:36,438 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (1/1) ...
[2019-11-24 04:10:36,446 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (1/1) ...
[2019-11-24 04:10:36,451 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (1/1) ...
[2019-11-24 04:10:36,453 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (1/1) ...
[2019-11-24 04:10:36,457 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-24 04:10:36,457 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-24 04:10:36,458 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-24 04:10:36,458 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-24 04:10:36,459 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (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 04:10:36,534 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2019-11-24 04:10:36,534 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2019-11-24 04:10:36,534 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2019-11-24 04:10:36,534 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2019-11-24 04:10:36,535 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2019-11-24 04:10:36,535 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-11-24 04:10:36,535 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$
[2019-11-24 04:10:36,535 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-24 04:10:36,535 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-24 04:10:37,129 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-24 04:10:37,130 INFO  L284             CfgBuilder]: Removed 19 assume(true) statements.
[2019-11-24 04:10:37,131 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:10:37 BoogieIcfgContainer
[2019-11-24 04:10:37,131 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-24 04:10:37,135 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-24 04:10:37,135 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-24 04:10:37,138 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-24 04:10:37,139 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:10:35" (1/3) ...
[2019-11-24 04:10:37,140 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce9c751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:10:37, skipping insertion in model container
[2019-11-24 04:10:37,140 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:10:36" (2/3) ...
[2019-11-24 04:10:37,141 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ce9c751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:10:37, skipping insertion in model container
[2019-11-24 04:10:37,141 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:10:37" (3/3) ...
[2019-11-24 04:10:37,148 INFO  L109   eAbstractionObserver]: Analyzing ICFG sll2c_remove_all.i
[2019-11-24 04:10:37,156 INFO  L153   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-24 04:10:37,163 INFO  L165   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-24 04:10:37,171 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-24 04:10:37,193 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-24 04:10:37,194 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-24 04:10:37,194 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-24 04:10:37,194 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-24 04:10:37,194 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-24 04:10:37,195 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-24 04:10:37,195 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-24 04:10:37,195 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-24 04:10:37,210 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states.
[2019-11-24 04:10:37,217 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2019-11-24 04:10:37,217 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:10:37,219 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2019-11-24 04:10:37,219 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:10:37,225 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:10:37,226 INFO  L82        PathProgramCache]: Analyzing trace with hash -887081139, now seen corresponding path program 1 times
[2019-11-24 04:10:37,234 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:10:37,235 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445337627]
[2019-11-24 04:10:37,235 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:10:37,349 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:10:37,422 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 04:10:37,423 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445337627]
[2019-11-24 04:10:37,424 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:10:37,424 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2019-11-24 04:10:37,426 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970097131]
[2019-11-24 04:10:37,431 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-24 04:10:37,432 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:10:37,457 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-24 04:10:37,458 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-11-24 04:10:37,462 INFO  L87              Difference]: Start difference. First operand 17 states. Second operand 3 states.
[2019-11-24 04:10:37,519 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:10:37,519 INFO  L93              Difference]: Finished difference Result 31 states and 44 transitions.
[2019-11-24 04:10:37,523 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-24 04:10:37,525 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 6
[2019-11-24 04:10:37,526 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:10:37,539 INFO  L225             Difference]: With dead ends: 31
[2019-11-24 04:10:37,539 INFO  L226             Difference]: Without dead ends: 15
[2019-11-24 04:10:37,548 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 04:10:37,568 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2019-11-24 04:10:37,597 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14.
[2019-11-24 04:10:37,599 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14 states.
[2019-11-24 04:10:37,600 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions.
[2019-11-24 04:10:37,602 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 6
[2019-11-24 04:10:37,603 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:10:37,603 INFO  L462      AbstractCegarLoop]: Abstraction has 14 states and 17 transitions.
[2019-11-24 04:10:37,603 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-24 04:10:37,603 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions.
[2019-11-24 04:10:37,604 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2019-11-24 04:10:37,604 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:10:37,604 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:10:37,605 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:10:37,605 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:10:37,605 INFO  L82        PathProgramCache]: Analyzing trace with hash 146338544, now seen corresponding path program 1 times
[2019-11-24 04:10:37,606 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:10:37,606 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449968982]
[2019-11-24 04:10:37,606 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:10:37,710 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:10:37,783 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-24 04:10:37,783 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449968982]
[2019-11-24 04:10:37,784 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:10:37,784 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-11-24 04:10:37,784 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426388094]
[2019-11-24 04:10:37,786 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-24 04:10:37,786 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:10:37,787 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-24 04:10:37,787 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-24 04:10:37,787 INFO  L87              Difference]: Start difference. First operand 14 states and 17 transitions. Second operand 4 states.
[2019-11-24 04:10:37,813 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:10:37,813 INFO  L93              Difference]: Finished difference Result 23 states and 28 transitions.
[2019-11-24 04:10:37,814 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-24 04:10:37,814 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 8
[2019-11-24 04:10:37,814 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:10:37,815 INFO  L225             Difference]: With dead ends: 23
[2019-11-24 04:10:37,815 INFO  L226             Difference]: Without dead ends: 20
[2019-11-24 04:10:37,816 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-11-24 04:10:37,817 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2019-11-24 04:10:37,820 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15.
[2019-11-24 04:10:37,821 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2019-11-24 04:10:37,821 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions.
[2019-11-24 04:10:37,822 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8
[2019-11-24 04:10:37,822 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:10:37,822 INFO  L462      AbstractCegarLoop]: Abstraction has 15 states and 18 transitions.
[2019-11-24 04:10:37,822 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-24 04:10:37,823 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions.
[2019-11-24 04:10:37,823 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2019-11-24 04:10:37,823 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:10:37,824 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:10:37,824 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:10:37,824 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:10:37,824 INFO  L82        PathProgramCache]: Analyzing trace with hash -1246391594, now seen corresponding path program 1 times
[2019-11-24 04:10:37,825 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:10:37,825 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820225441]
[2019-11-24 04:10:37,825 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:10:37,850 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:10:37,933 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-24 04:10:37,933 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820225441]
[2019-11-24 04:10:37,933 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:10:37,934 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-11-24 04:10:37,934 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971641988]
[2019-11-24 04:10:37,934 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-24 04:10:37,935 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:10:37,935 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-24 04:10:37,935 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-11-24 04:10:37,936 INFO  L87              Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 5 states.
[2019-11-24 04:10:38,093 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:10:38,093 INFO  L93              Difference]: Finished difference Result 24 states and 29 transitions.
[2019-11-24 04:10:38,093 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-24 04:10:38,094 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 11
[2019-11-24 04:10:38,094 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:10:38,095 INFO  L225             Difference]: With dead ends: 24
[2019-11-24 04:10:38,095 INFO  L226             Difference]: Without dead ends: 21
[2019-11-24 04:10:38,095 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-11-24 04:10:38,096 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2019-11-24 04:10:38,099 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16.
[2019-11-24 04:10:38,100 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2019-11-24 04:10:38,100 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions.
[2019-11-24 04:10:38,101 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11
[2019-11-24 04:10:38,101 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:10:38,101 INFO  L462      AbstractCegarLoop]: Abstraction has 16 states and 19 transitions.
[2019-11-24 04:10:38,101 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-24 04:10:38,101 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions.
[2019-11-24 04:10:38,102 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2019-11-24 04:10:38,102 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:10:38,102 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:10:38,102 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:10:38,103 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:10:38,103 INFO  L82        PathProgramCache]: Analyzing trace with hash 14116678, now seen corresponding path program 1 times
[2019-11-24 04:10:38,103 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:10:38,103 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826202095]
[2019-11-24 04:10:38,104 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:10:38,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:10:38,422 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-24 04:10:38,422 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826202095]
[2019-11-24 04:10:38,422 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-24 04:10:38,423 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-11-24 04:10:38,424 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524793645]
[2019-11-24 04:10:38,424 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-24 04:10:38,425 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:10:38,425 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-24 04:10:38,426 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-11-24 04:10:38,426 INFO  L87              Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 5 states.
[2019-11-24 04:10:38,550 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:10:38,551 INFO  L93              Difference]: Finished difference Result 29 states and 35 transitions.
[2019-11-24 04:10:38,551 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-24 04:10:38,551 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 14
[2019-11-24 04:10:38,552 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:10:38,552 INFO  L225             Difference]: With dead ends: 29
[2019-11-24 04:10:38,552 INFO  L226             Difference]: Without dead ends: 18
[2019-11-24 04:10:38,553 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-11-24 04:10:38,553 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2019-11-24 04:10:38,557 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2019-11-24 04:10:38,557 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2019-11-24 04:10:38,558 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions.
[2019-11-24 04:10:38,558 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 14
[2019-11-24 04:10:38,558 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:10:38,558 INFO  L462      AbstractCegarLoop]: Abstraction has 18 states and 21 transitions.
[2019-11-24 04:10:38,559 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-24 04:10:38,559 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions.
[2019-11-24 04:10:38,559 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2019-11-24 04:10:38,559 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:10:38,560 INFO  L410         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:10:38,560 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:10:38,560 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:10:38,560 INFO  L82        PathProgramCache]: Analyzing trace with hash 217351841, now seen corresponding path program 1 times
[2019-11-24 04:10:38,561 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:10:38,561 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846039141]
[2019-11-24 04:10:38,561 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:10:38,581 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:10:38,632 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-11-24 04:10:38,635 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846039141]
[2019-11-24 04:10:38,635 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954582400]
[2019-11-24 04:10:38,635 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 04:10:38,724 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:10:38,726 INFO  L255         TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-24 04:10:38,732 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-24 04:10:38,794 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-11-24 04:10:38,795 INFO  L320         TraceCheckSpWp]: Computing backward predicates...
[2019-11-24 04:10:38,824 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-11-24 04:10:38,825 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [920798461]
[2019-11-24 04:10:38,859 INFO  L159        IcfgInterpreter]: Started Sifa with 13 locations of interest
[2019-11-24 04:10:38,859 INFO  L166        IcfgInterpreter]: Building call graph
[2019-11-24 04:10:38,866 INFO  L171        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-11-24 04:10:38,873 INFO  L176        IcfgInterpreter]: Starting interpretation
[2019-11-24 04:10:38,874 INFO  L197        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-11-24 04:10:39,082 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:39,573 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:39,893 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:40,103 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:40,344 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:40,740 WARN  L192               SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 192
[2019-11-24 04:10:40,947 WARN  L192               SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 207
[2019-11-24 04:10:41,039 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:41,243 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:41,272 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:41,299 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:41,335 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:41,813 WARN  L192               SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 68
[2019-11-24 04:10:42,129 WARN  L192               SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67
[2019-11-24 04:10:42,200 WARN  L138   XnfTransformerHelper]: expecting exponential blowup for input size 12
[2019-11-24 04:10:42,795 WARN  L138   XnfTransformerHelper]: expecting exponential blowup for input size 12
[2019-11-24 04:10:43,902 WARN  L192               SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 211
[2019-11-24 04:10:44,091 WARN  L192               SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 228
[2019-11-24 04:10:44,257 WARN  L192               SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 229
[2019-11-24 04:10:44,560 WARN  L192               SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 258
[2019-11-24 04:10:44,905 WARN  L192               SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 259 DAG size of output: 257
[2019-11-24 04:10:45,274 WARN  L192               SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 257
[2019-11-24 04:10:45,485 WARN  L192               SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 258 DAG size of output: 258
[2019-11-24 04:10:46,278 WARN  L227             Elim1Store]: Array PQE input equivalent to false
[2019-11-24 04:10:46,343 INFO  L180        IcfgInterpreter]: Interpretation finished
[2019-11-24 04:10:46,494 WARN  L192               SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52
[2019-11-24 04:10:47,329 WARN  L192               SmtUtils]: Spent 782.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 106
[2019-11-24 04:10:47,701 WARN  L192               SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 81
[2019-11-24 04:10:48,689 WARN  L192               SmtUtils]: Spent 926.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 187
[2019-11-24 04:10:49,329 WARN  L192               SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 214 DAG size of output: 50
[2019-11-24 04:10:49,333 INFO  L343   FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown
[2019-11-24 04:10:49,333 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences.
[2019-11-24 04:10:49,333 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9
[2019-11-24 04:10:49,333 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498650284]
[2019-11-24 04:10:49,334 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 10 states
[2019-11-24 04:10:49,334 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-11-24 04:10:49,334 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2019-11-24 04:10:49,336 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342
[2019-11-24 04:10:49,336 INFO  L87              Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 10 states.
[2019-11-24 04:10:49,369 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-24 04:10:49,370 INFO  L93              Difference]: Finished difference Result 32 states and 37 transitions.
[2019-11-24 04:10:49,370 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-11-24 04:10:49,370 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 16
[2019-11-24 04:10:49,371 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-24 04:10:49,373 INFO  L225             Difference]: With dead ends: 32
[2019-11-24 04:10:49,373 INFO  L226             Difference]: Without dead ends: 29
[2019-11-24 04:10:49,374 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342
[2019-11-24 04:10:49,374 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2019-11-24 04:10:49,378 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25.
[2019-11-24 04:10:49,379 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2019-11-24 04:10:49,380 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions.
[2019-11-24 04:10:49,380 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16
[2019-11-24 04:10:49,380 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-24 04:10:49,380 INFO  L462      AbstractCegarLoop]: Abstraction has 25 states and 30 transitions.
[2019-11-24 04:10:49,380 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2019-11-24 04:10:49,380 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions.
[2019-11-24 04:10:49,381 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2019-11-24 04:10:49,381 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-24 04:10:49,381 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-24 04:10:49,584 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-24 04:10:49,585 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-24 04:10:49,585 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-24 04:10:49,586 INFO  L82        PathProgramCache]: Analyzing trace with hash -1268916089, now seen corresponding path program 1 times
[2019-11-24 04:10:49,586 INFO  L163   FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-11-24 04:10:49,586 INFO  L348   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496729962]
[2019-11-24 04:10:49,587 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-24 04:10:49,610 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:10:49,737 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-11-24 04:10:49,737 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496729962]
[2019-11-24 04:10:49,737 INFO  L348   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433132726]
[2019-11-24 04:10:49,738 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-24 04:10:49,822 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-24 04:10:49,823 INFO  L255         TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 51 conjunts are in the unsatisfiable core
[2019-11-24 04:10:49,827 INFO  L278         TraceCheckSpWp]: Computing forward predicates...
[2019-11-24 04:10:50,273 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-11-24 04:10:50,274 INFO  L320         TraceCheckSpWp]: Computing backward predicates...