java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_running-1.i


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 21:46:04,964 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-14 21:46:05,039 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-14 21:46:05,065 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 21:46:05,065 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 21:46:05,066 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 21:46:05,067 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 21:46:05,067 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 21:46:05,067 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 21:46:05,067 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 21:46:05,067 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 21:46:05,068 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 21:46:05,068 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 21:46:05,068 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 21:46:05,068 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 21:46:05,068 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 21:46:05,069 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 21:46:05,069 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 21:46:05,069 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 21:46:05,069 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 21:46:05,069 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 21:46:05,070 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 21:46:05,070 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 21:46:05,070 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 21:46:05,070 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 21:46:05,070 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 21:46:05,071 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 21:46:05,071 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 21:46:05,071 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 21:46:05,071 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 21:46:05,071 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 21:46:05,071 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 21:46:05,331 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 21:46:05,350 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 21:46:05,354 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 21:46:05,355 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 21:46:05,355 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 21:46:05,356 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_running-1.i
[2019-10-14 21:46:05,426 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6621f3289/813b012ac382476cb13d60b5d65c259d/FLAG2d5c58b66
[2019-10-14 21:46:05,888 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 21:46:05,888 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_running-1.i
[2019-10-14 21:46:05,893 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6621f3289/813b012ac382476cb13d60b5d65c259d/FLAG2d5c58b66
[2019-10-14 21:46:06,270 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6621f3289/813b012ac382476cb13d60b5d65c259d
[2019-10-14 21:46:06,280 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 21:46:06,283 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 21:46:06,284 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 21:46:06,285 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 21:46:06,289 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 21:46:06,290 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:06" (1/1) ...
[2019-10-14 21:46:06,293 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fe33d5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06, skipping insertion in model container
[2019-10-14 21:46:06,293 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:46:06" (1/1) ...
[2019-10-14 21:46:06,301 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 21:46:06,319 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 21:46:06,487 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:46:06,491 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 21:46:06,526 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:46:06,545 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 21:46:06,545 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06 WrapperNode
[2019-10-14 21:46:06,545 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 21:46:06,546 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 21:46:06,546 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 21:46:06,546 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 21:46:06,650 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06" (1/1) ...
[2019-10-14 21:46:06,651 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06" (1/1) ...
[2019-10-14 21:46:06,659 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06" (1/1) ...
[2019-10-14 21:46:06,660 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06" (1/1) ...
[2019-10-14 21:46:06,670 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06" (1/1) ...
[2019-10-14 21:46:06,678 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06" (1/1) ...
[2019-10-14 21:46:06,681 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06" (1/1) ...
[2019-10-14 21:46:06,689 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 21:46:06,690 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 21:46:06,690 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 21:46:06,690 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 21:46:06,691 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06" (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
[2019-10-14 21:46:06,757 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 21:46:06,757 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 21:46:06,758 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2019-10-14 21:46:06,758 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 21:46:06,759 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 21:46:06,759 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2019-10-14 21:46:06,759 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 21:46:06,760 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 21:46:06,760 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2019-10-14 21:46:06,760 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2019-10-14 21:46:06,760 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2019-10-14 21:46:06,760 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-10-14 21:46:06,761 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 21:46:06,761 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 21:46:07,055 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 21:46:07,056 INFO  L284             CfgBuilder]: Removed 3 assume(true) statements.
[2019-10-14 21:46:07,057 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:07 BoogieIcfgContainer
[2019-10-14 21:46:07,057 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 21:46:07,064 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 21:46:07,064 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 21:46:07,070 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 21:46:07,071 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:46:06" (1/3) ...
[2019-10-14 21:46:07,072 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e2d3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:07, skipping insertion in model container
[2019-10-14 21:46:07,072 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:46:06" (2/3) ...
[2019-10-14 21:46:07,073 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27e2d3ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:46:07, skipping insertion in model container
[2019-10-14 21:46:07,073 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:46:07" (3/3) ...
[2019-10-14 21:46:07,075 INFO  L109   eAbstractionObserver]: Analyzing ICFG standard_running-1.i
[2019-10-14 21:46:07,096 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 21:46:07,104 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 21:46:07,116 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 21:46:07,140 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 21:46:07,140 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 21:46:07,140 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 21:46:07,140 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 21:46:07,141 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 21:46:07,141 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 21:46:07,141 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 21:46:07,141 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 21:46:07,157 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states.
[2019-10-14 21:46:07,163 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2019-10-14 21:46:07,163 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:46:07,164 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:46:07,166 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:46:07,170 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:46:07,171 INFO  L82        PathProgramCache]: Analyzing trace with hash -766370701, now seen corresponding path program 1 times
[2019-10-14 21:46:07,177 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:46:07,177 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983462920]
[2019-10-14 21:46:07,177 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:07,178 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:07,178 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:46:07,254 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:07,324 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:07,331 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:46:07,332 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983462920]
[2019-10-14 21:46:07,334 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:46:07,334 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-14 21:46:07,335 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68098262]
[2019-10-14 21:46:07,340 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:46:07,341 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:46:07,355 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:46:07,357 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-14 21:46:07,361 INFO  L87              Difference]: Start difference. First operand 32 states. Second operand 3 states.
[2019-10-14 21:46:07,540 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:46:07,541 INFO  L93              Difference]: Finished difference Result 56 states and 77 transitions.
[2019-10-14 21:46:07,542 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:46:07,543 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 15
[2019-10-14 21:46:07,544 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:46:07,553 INFO  L225             Difference]: With dead ends: 56
[2019-10-14 21:46:07,553 INFO  L226             Difference]: Without dead ends: 25
[2019-10-14 21:46:07,560 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-14 21:46:07,580 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2019-10-14 21:46:07,603 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2019-10-14 21:46:07,605 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2019-10-14 21:46:07,607 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions.
[2019-10-14 21:46:07,610 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 15
[2019-10-14 21:46:07,611 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:46:07,611 INFO  L462      AbstractCegarLoop]: Abstraction has 25 states and 32 transitions.
[2019-10-14 21:46:07,611 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:46:07,612 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions.
[2019-10-14 21:46:07,613 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2019-10-14 21:46:07,614 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:46:07,614 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:46:07,615 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:46:07,616 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:46:07,616 INFO  L82        PathProgramCache]: Analyzing trace with hash 288109956, now seen corresponding path program 1 times
[2019-10-14 21:46:07,617 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:46:07,617 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137246077]
[2019-10-14 21:46:07,617 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:07,617 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:07,618 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:46:07,661 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:07,731 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:07,739 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:46:07,739 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137246077]
[2019-10-14 21:46:07,740 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:46:07,740 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 21:46:07,742 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405532814]
[2019-10-14 21:46:07,744 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-14 21:46:07,745 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:46:07,745 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-14 21:46:07,745 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-14 21:46:07,746 INFO  L87              Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 4 states.
[2019-10-14 21:46:07,882 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:46:07,882 INFO  L93              Difference]: Finished difference Result 54 states and 75 transitions.
[2019-10-14 21:46:07,883 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-14 21:46:07,883 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 15
[2019-10-14 21:46:07,883 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:46:07,884 INFO  L225             Difference]: With dead ends: 54
[2019-10-14 21:46:07,885 INFO  L226             Difference]: Without dead ends: 37
[2019-10-14 21:46:07,886 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-14 21:46:07,886 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2019-10-14 21:46:07,892 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28.
[2019-10-14 21:46:07,893 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2019-10-14 21:46:07,894 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions.
[2019-10-14 21:46:07,894 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15
[2019-10-14 21:46:07,894 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:46:07,895 INFO  L462      AbstractCegarLoop]: Abstraction has 28 states and 35 transitions.
[2019-10-14 21:46:07,895 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-14 21:46:07,895 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions.
[2019-10-14 21:46:07,896 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2019-10-14 21:46:07,896 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:46:07,896 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:46:07,897 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:46:07,897 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:46:07,897 INFO  L82        PathProgramCache]: Analyzing trace with hash 1452110141, now seen corresponding path program 1 times
[2019-10-14 21:46:07,897 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:46:07,898 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214665061]
[2019-10-14 21:46:07,898 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:07,898 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:07,898 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:46:07,941 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:08,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:08,032 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-10-14 21:46:08,033 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214665061]
[2019-10-14 21:46:08,033 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:46:08,033 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-14 21:46:08,033 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056554807]
[2019-10-14 21:46:08,034 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-14 21:46:08,034 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:46:08,034 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-14 21:46:08,035 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-10-14 21:46:08,035 INFO  L87              Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 6 states.
[2019-10-14 21:46:08,171 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:46:08,172 INFO  L93              Difference]: Finished difference Result 46 states and 61 transitions.
[2019-10-14 21:46:08,173 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:46:08,173 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 27
[2019-10-14 21:46:08,174 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:46:08,174 INFO  L225             Difference]: With dead ends: 46
[2019-10-14 21:46:08,175 INFO  L226             Difference]: Without dead ends: 34
[2019-10-14 21:46:08,176 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:46:08,176 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2019-10-14 21:46:08,183 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32.
[2019-10-14 21:46:08,185 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2019-10-14 21:46:08,187 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions.
[2019-10-14 21:46:08,187 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 27
[2019-10-14 21:46:08,188 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:46:08,188 INFO  L462      AbstractCegarLoop]: Abstraction has 32 states and 40 transitions.
[2019-10-14 21:46:08,188 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-14 21:46:08,188 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions.
[2019-10-14 21:46:08,190 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2019-10-14 21:46:08,191 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:46:08,191 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:46:08,191 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:46:08,192 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:46:08,192 INFO  L82        PathProgramCache]: Analyzing trace with hash -1877196419, now seen corresponding path program 1 times
[2019-10-14 21:46:08,192 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:46:08,193 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669269619]
[2019-10-14 21:46:08,193 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:08,193 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:08,194 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:46:08,242 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:08,310 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:08,314 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-10-14 21:46:08,314 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669269619]
[2019-10-14 21:46:08,314 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913903453]
[2019-10-14 21:46:08,314 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
[2019-10-14 21:46:08,366 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:08,368 INFO  L256         TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core
[2019-10-14 21:46:08,375 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:46:08,408 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-10-14 21:46:08,409 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:46:08,409 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6
[2019-10-14 21:46:08,409 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357366761]
[2019-10-14 21:46:08,410 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-14 21:46:08,410 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:46:08,410 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-14 21:46:08,411 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-14 21:46:08,411 INFO  L87              Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 6 states.
[2019-10-14 21:46:08,530 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:46:08,530 INFO  L93              Difference]: Finished difference Result 84 states and 114 transitions.
[2019-10-14 21:46:08,531 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-14 21:46:08,531 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 27
[2019-10-14 21:46:08,531 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:46:08,532 INFO  L225             Difference]: With dead ends: 84
[2019-10-14 21:46:08,532 INFO  L226             Difference]: Without dead ends: 61
[2019-10-14 21:46:08,533 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2019-10-14 21:46:08,533 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2019-10-14 21:46:08,539 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 48.
[2019-10-14 21:46:08,540 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2019-10-14 21:46:08,543 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions.
[2019-10-14 21:46:08,543 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 27
[2019-10-14 21:46:08,543 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:46:08,543 INFO  L462      AbstractCegarLoop]: Abstraction has 48 states and 62 transitions.
[2019-10-14 21:46:08,543 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-14 21:46:08,544 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions.
[2019-10-14 21:46:08,545 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2019-10-14 21:46:08,545 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:46:08,547 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:46:08,748 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:46:08,749 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:46:08,750 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:46:08,750 INFO  L82        PathProgramCache]: Analyzing trace with hash -1355439264, now seen corresponding path program 2 times
[2019-10-14 21:46:08,751 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:46:08,751 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40618911]
[2019-10-14 21:46:08,751 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:08,751 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:08,752 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:46:08,786 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:08,847 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:08,852 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-10-14 21:46:08,853 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40618911]
[2019-10-14 21:46:08,853 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285587969]
[2019-10-14 21:46:08,853 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
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
[2019-10-14 21:46:08,919 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2019-10-14 21:46:08,920 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-10-14 21:46:08,921 INFO  L256         TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:46:08,925 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:46:08,940 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2019-10-14 21:46:08,940 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:46:08,941 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7
[2019-10-14 21:46:08,941 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136898733]
[2019-10-14 21:46:08,941 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-10-14 21:46:08,942 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:46:08,942 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-10-14 21:46:08,942 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:46:08,942 INFO  L87              Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 7 states.
[2019-10-14 21:46:09,092 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:46:09,092 INFO  L93              Difference]: Finished difference Result 114 states and 156 transitions.
[2019-10-14 21:46:09,093 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-10-14 21:46:09,093 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 39
[2019-10-14 21:46:09,094 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:46:09,095 INFO  L225             Difference]: With dead ends: 114
[2019-10-14 21:46:09,095 INFO  L226             Difference]: Without dead ends: 77
[2019-10-14 21:46:09,098 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:46:09,099 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2019-10-14 21:46:09,112 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 64.
[2019-10-14 21:46:09,113 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 64 states.
[2019-10-14 21:46:09,114 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 84 transitions.
[2019-10-14 21:46:09,116 INFO  L78                 Accepts]: Start accepts. Automaton has 64 states and 84 transitions. Word has length 39
[2019-10-14 21:46:09,116 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:46:09,116 INFO  L462      AbstractCegarLoop]: Abstraction has 64 states and 84 transitions.
[2019-10-14 21:46:09,116 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-10-14 21:46:09,116 INFO  L276                IsEmpty]: Start isEmpty. Operand 64 states and 84 transitions.
[2019-10-14 21:46:09,118 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2019-10-14 21:46:09,118 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:46:09,118 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:46:09,319 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:46:09,319 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:46:09,319 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:46:09,319 INFO  L82        PathProgramCache]: Analyzing trace with hash 1296674585, now seen corresponding path program 3 times
[2019-10-14 21:46:09,320 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:46:09,320 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672471508]
[2019-10-14 21:46:09,320 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:09,321 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:09,321 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:46:09,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:09,417 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:09,421 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked.
[2019-10-14 21:46:09,421 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672471508]
[2019-10-14 21:46:09,422 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630621916]
[2019-10-14 21:46:09,422 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:46:09,474 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2019-10-14 21:46:09,474 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-10-14 21:46:09,475 INFO  L256         TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core
[2019-10-14 21:46:09,479 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:46:09,544 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8
[2019-10-14 21:46:09,545 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:09,553 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-14 21:46:09,553 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:09,554 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11
[2019-10-14 21:46:09,627 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26
[2019-10-14 21:46:09,629 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:09,649 INFO  L567         ElimStorePlain]: treesize reduction 4, result has 87.9 percent of original size
[2019-10-14 21:46:09,650 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2019-10-14 21:46:09,650 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:29
[2019-10-14 21:46:09,875 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:46:09,918 INFO  L341             Elim1Store]: treesize reduction 16, result has 56.8 percent of original size
[2019-10-14 21:46:09,919 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 43
[2019-10-14 21:46:09,920 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:46:09,921 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:46:09,922 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:46:09,923 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:09,956 INFO  L567         ElimStorePlain]: treesize reduction 2, result has 93.3 percent of original size
[2019-10-14 21:46:09,959 INFO  L496         ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars,  End of recursive call:  and 2 xjuncts.
[2019-10-14 21:46:09,959 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:47, output treesize:17
[2019-10-14 21:46:10,053 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked.
[2019-10-14 21:46:10,053 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:46:10,054 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16
[2019-10-14 21:46:10,054 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662153744]
[2019-10-14 21:46:10,054 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 16 states
[2019-10-14 21:46:10,055 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:46:10,055 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2019-10-14 21:46:10,055 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240
[2019-10-14 21:46:10,055 INFO  L87              Difference]: Start difference. First operand 64 states and 84 transitions. Second operand 16 states.
[2019-10-14 21:46:11,754 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:46:11,755 INFO  L93              Difference]: Finished difference Result 248 states and 357 transitions.
[2019-10-14 21:46:11,755 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. 
[2019-10-14 21:46:11,755 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 51
[2019-10-14 21:46:11,756 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:46:11,759 INFO  L225             Difference]: With dead ends: 248
[2019-10-14 21:46:11,760 INFO  L226             Difference]: Without dead ends: 197
[2019-10-14 21:46:11,762 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=636, Invalid=2016, Unknown=0, NotChecked=0, Total=2652
[2019-10-14 21:46:11,762 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 197 states.
[2019-10-14 21:46:11,778 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 178.
[2019-10-14 21:46:11,778 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 178 states.
[2019-10-14 21:46:11,782 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 247 transitions.
[2019-10-14 21:46:11,783 INFO  L78                 Accepts]: Start accepts. Automaton has 178 states and 247 transitions. Word has length 51
[2019-10-14 21:46:11,783 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:46:11,783 INFO  L462      AbstractCegarLoop]: Abstraction has 178 states and 247 transitions.
[2019-10-14 21:46:11,783 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2019-10-14 21:46:11,783 INFO  L276                IsEmpty]: Start isEmpty. Operand 178 states and 247 transitions.
[2019-10-14 21:46:11,787 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 88
[2019-10-14 21:46:11,787 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:46:11,788 INFO  L380         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:46:11,993 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:46:11,993 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:46:11,993 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:46:11,994 INFO  L82        PathProgramCache]: Analyzing trace with hash -1040797544, now seen corresponding path program 1 times
[2019-10-14 21:46:11,994 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:46:11,995 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036247294]
[2019-10-14 21:46:11,996 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:11,996 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:11,996 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:46:12,039 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:12,137 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:12,144 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked.
[2019-10-14 21:46:12,144 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036247294]
[2019-10-14 21:46:12,145 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771439794]
[2019-10-14 21:46:12,145 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:46:12,214 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:12,216 INFO  L256         TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 8 conjunts are in the unsatisfiable core
[2019-10-14 21:46:12,222 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:46:12,247 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked.
[2019-10-14 21:46:12,247 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:46:12,248 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11
[2019-10-14 21:46:12,248 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065395864]
[2019-10-14 21:46:12,249 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-14 21:46:12,249 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:46:12,250 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-14 21:46:12,250 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110
[2019-10-14 21:46:12,250 INFO  L87              Difference]: Start difference. First operand 178 states and 247 transitions. Second operand 11 states.
[2019-10-14 21:46:12,449 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:46:12,450 INFO  L93              Difference]: Finished difference Result 399 states and 564 transitions.
[2019-10-14 21:46:12,450 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2019-10-14 21:46:12,450 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 87
[2019-10-14 21:46:12,450 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:46:12,452 INFO  L225             Difference]: With dead ends: 399
[2019-10-14 21:46:12,452 INFO  L226             Difference]: Without dead ends: 240
[2019-10-14 21:46:12,454 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110
[2019-10-14 21:46:12,454 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 240 states.
[2019-10-14 21:46:12,471 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 205.
[2019-10-14 21:46:12,471 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 205 states.
[2019-10-14 21:46:12,474 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 285 transitions.
[2019-10-14 21:46:12,474 INFO  L78                 Accepts]: Start accepts. Automaton has 205 states and 285 transitions. Word has length 87
[2019-10-14 21:46:12,474 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:46:12,475 INFO  L462      AbstractCegarLoop]: Abstraction has 205 states and 285 transitions.
[2019-10-14 21:46:12,475 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-14 21:46:12,475 INFO  L276                IsEmpty]: Start isEmpty. Operand 205 states and 285 transitions.
[2019-10-14 21:46:12,477 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 100
[2019-10-14 21:46:12,477 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:46:12,477 INFO  L380         BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:46:12,682 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:46:12,683 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:46:12,683 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:46:12,683 INFO  L82        PathProgramCache]: Analyzing trace with hash 370428881, now seen corresponding path program 2 times
[2019-10-14 21:46:12,684 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:46:12,684 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258857095]
[2019-10-14 21:46:12,685 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:12,685 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:12,685 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:46:12,717 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:12,810 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:12,822 INFO  L134       CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2019-10-14 21:46:12,822 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258857095]
[2019-10-14 21:46:12,824 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058056755]
[2019-10-14 21:46:12,824 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:46:12,921 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2019-10-14 21:46:12,921 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-10-14 21:46:12,923 INFO  L256         TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-10-14 21:46:12,933 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:46:12,962 INFO  L134       CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked.
[2019-10-14 21:46:12,963 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:46:12,963 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12
[2019-10-14 21:46:12,963 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287589408]
[2019-10-14 21:46:12,964 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 12 states
[2019-10-14 21:46:12,964 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:46:12,964 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2019-10-14 21:46:12,964 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132
[2019-10-14 21:46:12,965 INFO  L87              Difference]: Start difference. First operand 205 states and 285 transitions. Second operand 12 states.
[2019-10-14 21:46:13,228 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:46:13,228 INFO  L93              Difference]: Finished difference Result 451 states and 638 transitions.
[2019-10-14 21:46:13,229 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2019-10-14 21:46:13,229 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 99
[2019-10-14 21:46:13,229 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:46:13,231 INFO  L225             Difference]: With dead ends: 451
[2019-10-14 21:46:13,231 INFO  L226             Difference]: Without dead ends: 267
[2019-10-14 21:46:13,232 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132
[2019-10-14 21:46:13,233 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 267 states.
[2019-10-14 21:46:13,249 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 232.
[2019-10-14 21:46:13,249 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 232 states.
[2019-10-14 21:46:13,258 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 323 transitions.
[2019-10-14 21:46:13,259 INFO  L78                 Accepts]: Start accepts. Automaton has 232 states and 323 transitions. Word has length 99
[2019-10-14 21:46:13,259 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:46:13,259 INFO  L462      AbstractCegarLoop]: Abstraction has 232 states and 323 transitions.
[2019-10-14 21:46:13,259 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2019-10-14 21:46:13,259 INFO  L276                IsEmpty]: Start isEmpty. Operand 232 states and 323 transitions.
[2019-10-14 21:46:13,264 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 112
[2019-10-14 21:46:13,264 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:46:13,265 INFO  L380         BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:46:13,465 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:46:13,466 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:46:13,466 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:46:13,466 INFO  L82        PathProgramCache]: Analyzing trace with hash 855562356, now seen corresponding path program 3 times
[2019-10-14 21:46:13,466 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:46:13,467 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256203480]
[2019-10-14 21:46:13,467 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:13,467 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:46:13,468 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:46:13,500 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:13,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:46:13,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked.
[2019-10-14 21:46:13,610 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256203480]
[2019-10-14 21:46:13,610 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150035723]
[2019-10-14 21:46:13,610 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:46:13,679 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2019-10-14 21:46:13,680 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-10-14 21:46:13,681 INFO  L256         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core
[2019-10-14 21:46:13,695 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:46:13,707 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8
[2019-10-14 21:46:13,707 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:13,712 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-14 21:46:13,713 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:13,713 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:12, output treesize:8
[2019-10-14 21:46:13,760 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28
[2019-10-14 21:46:13,761 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:13,768 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-14 21:46:13,768 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars,  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:13,769 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32
[2019-10-14 21:46:13,875 INFO  L341             Elim1Store]: treesize reduction 40, result has 23.1 percent of original size
[2019-10-14 21:46:13,875 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 44
[2019-10-14 21:46:13,876 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:13,888 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-14 21:46:13,889 INFO  L496         ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2019-10-14 21:46:13,889 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:52, output treesize:48
[2019-10-14 21:46:15,569 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:46:15,611 INFO  L341             Elim1Store]: treesize reduction 18, result has 43.8 percent of original size
[2019-10-14 21:46:15,612 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 41
[2019-10-14 21:46:15,612 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:46:15,613 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-10-14 21:46:15,634 INFO  L567         ElimStorePlain]: treesize reduction 2, result has 92.0 percent of original size
[2019-10-14 21:46:15,635 INFO  L496         ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars,  End of recursive call:  and 3 xjuncts.
[2019-10-14 21:46:15,635 INFO  L221         ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:60, output treesize:8
[2019-10-14 21:46:15,852 INFO  L134       CoverageAnalysis]: Checked inductivity of 360 backedges. 25 proven. 91 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked.
[2019-10-14 21:46:15,853 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:46:15,853 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 25
[2019-10-14 21:46:15,853 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064972972]
[2019-10-14 21:46:15,854 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 25 states
[2019-10-14 21:46:15,854 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:46:15,854 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2019-10-14 21:46:15,855 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600
[2019-10-14 21:46:15,855 INFO  L87              Difference]: Start difference. First operand 232 states and 323 transitions. Second operand 25 states.