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/eca-rers2012/Problem11_label21.c


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This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 18:00:01,166 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 18:00:01,169 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-13 18:00:01,247 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
[2019-10-13 18:00:01,269 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 18:00:01,269 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 18:00:01,272 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 18:00:01,272 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 18:00:01,272 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 18:00:01,272 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 18:00:01,272 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 18:00:01,273 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 18:00:01,273 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 18:00:01,273 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 18:00:01,274 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 18:00:01,275 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 18:00:01,275 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 18:00:01,275 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 18:00:01,275 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 18:00:01,276 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 18:00:01,276 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 18:00:01,276 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 18:00:01,276 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 18:00:01,276 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 18:00:01,277 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 18:00:01,277 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 18:00:01,277 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 18:00:01,278 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 18:00:01,278 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 18:00:01,278 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 18:00:01,278 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 18:00:01,278 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 18:00:01,279 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 18:00:01,547 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 18:00:01,560 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 18:00:01,563 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 18:00:01,565 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 18:00:01,565 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 18:00:01,566 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label21.c
[2019-10-13 18:00:01,627 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6a9af248/1a17013a92f24a19a0e9f766622bde1b/FLAG44d32bd95
[2019-10-13 18:00:02,234 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 18:00:02,235 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label21.c
[2019-10-13 18:00:02,251 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6a9af248/1a17013a92f24a19a0e9f766622bde1b/FLAG44d32bd95
[2019-10-13 18:00:02,440 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6a9af248/1a17013a92f24a19a0e9f766622bde1b
[2019-10-13 18:00:02,450 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 18:00:02,452 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 18:00:02,453 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 18:00:02,453 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 18:00:02,457 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 18:00:02,458 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:02" (1/1) ...
[2019-10-13 18:00:02,461 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c28f7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:02, skipping insertion in model container
[2019-10-13 18:00:02,461 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:02" (1/1) ...
[2019-10-13 18:00:02,468 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 18:00:02,545 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 18:00:03,272 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:00:03,286 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 18:00:03,497 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:00:03,516 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 18:00:03,517 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03 WrapperNode
[2019-10-13 18:00:03,518 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 18:00:03,519 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 18:00:03,519 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 18:00:03,519 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 18:00:03,533 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03" (1/1) ...
[2019-10-13 18:00:03,534 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03" (1/1) ...
[2019-10-13 18:00:03,575 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03" (1/1) ...
[2019-10-13 18:00:03,576 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03" (1/1) ...
[2019-10-13 18:00:03,664 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03" (1/1) ...
[2019-10-13 18:00:03,677 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03" (1/1) ...
[2019-10-13 18:00:03,691 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03" (1/1) ...
[2019-10-13 18:00:03,709 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 18:00:03,710 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 18:00:03,710 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 18:00:03,710 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 18:00:03,711 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03" (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
[2019-10-13 18:00:03,787 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 18:00:03,787 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 18:00:03,788 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 18:00:03,788 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 18:00:03,788 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 18:00:03,788 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 18:00:03,788 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 18:00:03,789 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 18:00:03,789 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 18:00:03,789 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 18:00:03,789 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 18:00:05,577 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 18:00:05,578 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 18:00:05,579 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:05 BoogieIcfgContainer
[2019-10-13 18:00:05,580 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 18:00:05,581 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 18:00:05,581 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 18:00:05,585 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 18:00:05,585 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:02" (1/3) ...
[2019-10-13 18:00:05,586 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d219af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:05, skipping insertion in model container
[2019-10-13 18:00:05,586 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03" (2/3) ...
[2019-10-13 18:00:05,587 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d219af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:05, skipping insertion in model container
[2019-10-13 18:00:05,587 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:05" (3/3) ...
[2019-10-13 18:00:05,589 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label21.c
[2019-10-13 18:00:05,600 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 18:00:05,609 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 18:00:05,621 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 18:00:05,651 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 18:00:05,652 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 18:00:05,652 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 18:00:05,652 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 18:00:05,652 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 18:00:05,652 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 18:00:05,653 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 18:00:05,653 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 18:00:05,680 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-10-13 18:00:05,687 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2019-10-13 18:00:05,688 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:05,689 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, 1, 1, 1]
[2019-10-13 18:00:05,690 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:05,696 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:05,696 INFO  L82        PathProgramCache]: Analyzing trace with hash 1029260131, now seen corresponding path program 1 times
[2019-10-13 18:00:05,705 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:05,706 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996254726]
[2019-10-13 18:00:05,706 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:05,706 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:05,707 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:05,829 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:06,066 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:06,102 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:06,103 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996254726]
[2019-10-13 18:00:06,104 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:00:06,104 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 18:00:06,104 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829446790]
[2019-10-13 18:00:06,109 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:00:06,110 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:06,124 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:00:06,125 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:00:06,127 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-10-13 18:00:09,651 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:09,652 INFO  L93              Difference]: Finished difference Result 990 states and 1774 transitions.
[2019-10-13 18:00:09,652 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:09,654 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 30
[2019-10-13 18:00:09,654 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:09,684 INFO  L225             Difference]: With dead ends: 990
[2019-10-13 18:00:09,684 INFO  L226             Difference]: Without dead ends: 629
[2019-10-13 18:00:09,700 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:09,721 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 629 states.
[2019-10-13 18:00:09,813 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625.
[2019-10-13 18:00:09,814 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 625 states.
[2019-10-13 18:00:09,818 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions.
[2019-10-13 18:00:09,820 INFO  L78                 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 30
[2019-10-13 18:00:09,821 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:09,821 INFO  L462      AbstractCegarLoop]: Abstraction has 625 states and 865 transitions.
[2019-10-13 18:00:09,822 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:09,823 INFO  L276                IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions.
[2019-10-13 18:00:09,833 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 104
[2019-10-13 18:00:09,834 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:09,835 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:09,836 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:09,837 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:09,837 INFO  L82        PathProgramCache]: Analyzing trace with hash -27309419, now seen corresponding path program 1 times
[2019-10-13 18:00:09,838 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:09,838 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134761550]
[2019-10-13 18:00:09,838 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:09,839 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:09,839 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:09,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:10,116 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:10,153 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:10,208 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:10,209 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134761550]
[2019-10-13 18:00:10,209 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347837820]
[2019-10-13 18:00:10,209 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
[2019-10-13 18:00:10,315 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:10,317 INFO  L256         TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 18:00:10,334 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:10,432 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:10,432 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:10,433 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-13 18:00:10,434 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378915007]
[2019-10-13 18:00:10,439 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 18:00:10,439 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:10,439 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 18:00:10,440 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:10,440 INFO  L87              Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 3 states.
[2019-10-13 18:00:11,569 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:11,569 INFO  L93              Difference]: Finished difference Result 1826 states and 2564 transitions.
[2019-10-13 18:00:11,571 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 18:00:11,572 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 103
[2019-10-13 18:00:11,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:11,579 INFO  L225             Difference]: With dead ends: 1826
[2019-10-13 18:00:11,580 INFO  L226             Difference]: Without dead ends: 1207
[2019-10-13 18:00:11,582 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:11,584 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1207 states.
[2019-10-13 18:00:11,625 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1197.
[2019-10-13 18:00:11,626 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1197 states.
[2019-10-13 18:00:11,631 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1562 transitions.
[2019-10-13 18:00:11,632 INFO  L78                 Accepts]: Start accepts. Automaton has 1197 states and 1562 transitions. Word has length 103
[2019-10-13 18:00:11,633 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:11,633 INFO  L462      AbstractCegarLoop]: Abstraction has 1197 states and 1562 transitions.
[2019-10-13 18:00:11,633 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 18:00:11,633 INFO  L276                IsEmpty]: Start isEmpty. Operand 1197 states and 1562 transitions.
[2019-10-13 18:00:11,636 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 105
[2019-10-13 18:00:11,636 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:11,637 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:11,840 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:11,841 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:11,841 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:11,841 INFO  L82        PathProgramCache]: Analyzing trace with hash 1916245598, now seen corresponding path program 1 times
[2019-10-13 18:00:11,842 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:11,842 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270750490]
[2019-10-13 18:00:11,843 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:11,843 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:11,843 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:11,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:11,959 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:11,996 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:12,038 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:12,039 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270750490]
[2019-10-13 18:00:12,039 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044372227]
[2019-10-13 18:00:12,039 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
[2019-10-13 18:00:12,108 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:12,110 INFO  L256         TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-10-13 18:00:12,114 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:12,153 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-13 18:00:12,197 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:12,197 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:12,197 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9
[2019-10-13 18:00:12,198 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705498926]
[2019-10-13 18:00:12,198 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:00:12,198 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:12,199 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:00:12,199 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2019-10-13 18:00:12,199 INFO  L87              Difference]: Start difference. First operand 1197 states and 1562 transitions. Second operand 5 states.
[2019-10-13 18:00:13,949 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:13,950 INFO  L93              Difference]: Finished difference Result 2626 states and 3466 transitions.
[2019-10-13 18:00:13,950 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-13 18:00:13,950 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 104
[2019-10-13 18:00:13,951 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:13,961 INFO  L225             Difference]: With dead ends: 2626
[2019-10-13 18:00:13,961 INFO  L226             Difference]: Without dead ends: 1435
[2019-10-13 18:00:13,965 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2019-10-13 18:00:13,968 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1435 states.
[2019-10-13 18:00:14,022 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1416.
[2019-10-13 18:00:14,022 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1416 states.
[2019-10-13 18:00:14,029 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1825 transitions.
[2019-10-13 18:00:14,030 INFO  L78                 Accepts]: Start accepts. Automaton has 1416 states and 1825 transitions. Word has length 104
[2019-10-13 18:00:14,031 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:14,032 INFO  L462      AbstractCegarLoop]: Abstraction has 1416 states and 1825 transitions.
[2019-10-13 18:00:14,032 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:14,032 INFO  L276                IsEmpty]: Start isEmpty. Operand 1416 states and 1825 transitions.
[2019-10-13 18:00:14,041 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 162
[2019-10-13 18:00:14,042 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:14,042 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:14,245 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:14,246 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:14,246 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:14,246 INFO  L82        PathProgramCache]: Analyzing trace with hash -1980771380, now seen corresponding path program 1 times
[2019-10-13 18:00:14,247 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:14,247 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593673170]
[2019-10-13 18:00:14,247 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:14,247 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:14,247 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:14,327 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:14,495 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:14,561 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:14,660 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:14,661 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593673170]
[2019-10-13 18:00:14,661 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175977082]
[2019-10-13 18:00:14,662 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
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
[2019-10-13 18:00:14,747 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:14,749 INFO  L256         TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 18:00:14,766 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:14,839 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:14,840 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:14,841 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-13 18:00:14,842 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085447833]
[2019-10-13 18:00:14,844 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 18:00:14,845 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:14,845 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 18:00:14,845 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:14,845 INFO  L87              Difference]: Start difference. First operand 1416 states and 1825 transitions. Second operand 3 states.
[2019-10-13 18:00:15,980 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:15,983 INFO  L93              Difference]: Finished difference Result 3607 states and 4769 transitions.
[2019-10-13 18:00:15,983 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 18:00:15,984 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 161
[2019-10-13 18:00:15,984 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:15,999 INFO  L225             Difference]: With dead ends: 3607
[2019-10-13 18:00:15,999 INFO  L226             Difference]: Without dead ends: 2197
[2019-10-13 18:00:16,004 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:16,007 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2197 states.
[2019-10-13 18:00:16,069 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1995.
[2019-10-13 18:00:16,069 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1995 states.
[2019-10-13 18:00:16,079 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2622 transitions.
[2019-10-13 18:00:16,080 INFO  L78                 Accepts]: Start accepts. Automaton has 1995 states and 2622 transitions. Word has length 161
[2019-10-13 18:00:16,081 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:16,081 INFO  L462      AbstractCegarLoop]: Abstraction has 1995 states and 2622 transitions.
[2019-10-13 18:00:16,081 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 18:00:16,081 INFO  L276                IsEmpty]: Start isEmpty. Operand 1995 states and 2622 transitions.
[2019-10-13 18:00:16,084 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 177
[2019-10-13 18:00:16,084 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:16,085 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:16,290 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:16,291 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:16,291 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:16,292 INFO  L82        PathProgramCache]: Analyzing trace with hash 943896253, now seen corresponding path program 1 times
[2019-10-13 18:00:16,292 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:16,293 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822639649]
[2019-10-13 18:00:16,293 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:16,294 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:16,294 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:16,317 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:16,384 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:16,417 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:16,497 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:16,555 INFO  L134       CoverageAnalysis]: Checked inductivity of 118 backedges. 46 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-13 18:00:16,555 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822639649]
[2019-10-13 18:00:16,555 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526252877]
[2019-10-13 18:00:16,556 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
[2019-10-13 18:00:16,643 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:16,645 INFO  L256         TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-13 18:00:16,649 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:16,742 INFO  L134       CoverageAnalysis]: Checked inductivity of 118 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2019-10-13 18:00:16,744 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:16,744 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-13 18:00:16,744 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117097650]
[2019-10-13 18:00:16,745 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:00:16,745 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:16,746 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:00:16,746 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-13 18:00:16,746 INFO  L87              Difference]: Start difference. First operand 1995 states and 2622 transitions. Second operand 5 states.
[2019-10-13 18:00:18,558 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:18,558 INFO  L93              Difference]: Finished difference Result 4832 states and 6597 transitions.
[2019-10-13 18:00:18,561 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:18,562 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 176
[2019-10-13 18:00:18,562 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:18,579 INFO  L225             Difference]: With dead ends: 4832
[2019-10-13 18:00:18,579 INFO  L226             Difference]: Without dead ends: 2843
[2019-10-13 18:00:18,585 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182
[2019-10-13 18:00:18,588 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2843 states.
[2019-10-13 18:00:18,656 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2805.
[2019-10-13 18:00:18,657 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2805 states.
[2019-10-13 18:00:18,667 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 3710 transitions.
[2019-10-13 18:00:18,668 INFO  L78                 Accepts]: Start accepts. Automaton has 2805 states and 3710 transitions. Word has length 176
[2019-10-13 18:00:18,668 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:18,668 INFO  L462      AbstractCegarLoop]: Abstraction has 2805 states and 3710 transitions.
[2019-10-13 18:00:18,668 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:18,669 INFO  L276                IsEmpty]: Start isEmpty. Operand 2805 states and 3710 transitions.
[2019-10-13 18:00:18,672 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 221
[2019-10-13 18:00:18,672 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:18,673 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:18,876 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:18,877 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:18,877 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:18,877 INFO  L82        PathProgramCache]: Analyzing trace with hash 2096041879, now seen corresponding path program 1 times
[2019-10-13 18:00:18,877 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:18,878 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211448255]
[2019-10-13 18:00:18,878 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:18,878 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:18,878 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:18,920 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:19,073 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:19,099 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:19,155 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:19,205 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked.
[2019-10-13 18:00:19,206 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211448255]
[2019-10-13 18:00:19,206 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926443414]
[2019-10-13 18:00:19,206 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
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
[2019-10-13 18:00:19,296 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:19,298 INFO  L256         TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 15 conjunts are in the unsatisfiable core
[2019-10-13 18:00:19,302 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:19,393 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-13 18:00:19,394 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,395 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,397 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,398 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,402 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,406 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,408 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,410 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,413 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,414 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,414 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,416 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,417 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,419 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,422 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,424 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,428 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,428 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,429 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,430 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,431 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,433 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,434 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,434 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,436 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,436 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,437 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,439 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,440 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,441 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,442 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,443 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,754 WARN  L191               SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 48
[2019-10-13 18:00:19,759 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:19,952 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 71 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:19,952 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:19,952 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13
[2019-10-13 18:00:19,953 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168896897]
[2019-10-13 18:00:19,954 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 13 states
[2019-10-13 18:00:19,954 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:19,954 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2019-10-13 18:00:19,955 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156
[2019-10-13 18:00:19,955 INFO  L87              Difference]: Start difference. First operand 2805 states and 3710 transitions. Second operand 13 states.
[2019-10-13 18:00:28,279 WARN  L191               SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63
[2019-10-13 18:00:32,361 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:32,362 INFO  L93              Difference]: Finished difference Result 15530 states and 22816 transitions.
[2019-10-13 18:00:32,362 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. 
[2019-10-13 18:00:32,362 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 220
[2019-10-13 18:00:32,364 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:32,439 INFO  L225             Difference]: With dead ends: 15530
[2019-10-13 18:00:32,439 INFO  L226             Difference]: Without dead ends: 12919
[2019-10-13 18:00:32,456 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=713, Invalid=2593, Unknown=0, NotChecked=0, Total=3306
[2019-10-13 18:00:32,469 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12919 states.
[2019-10-13 18:00:32,812 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12919 to 10316.
[2019-10-13 18:00:32,813 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10316 states.
[2019-10-13 18:00:32,839 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10316 states to 10316 states and 13348 transitions.
[2019-10-13 18:00:32,839 INFO  L78                 Accepts]: Start accepts. Automaton has 10316 states and 13348 transitions. Word has length 220
[2019-10-13 18:00:32,839 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:32,840 INFO  L462      AbstractCegarLoop]: Abstraction has 10316 states and 13348 transitions.
[2019-10-13 18:00:32,840 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2019-10-13 18:00:32,840 INFO  L276                IsEmpty]: Start isEmpty. Operand 10316 states and 13348 transitions.
[2019-10-13 18:00:32,853 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 326
[2019-10-13 18:00:32,853 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:32,854 INFO  L380         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:33,058 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:33,059 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:33,059 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:33,059 INFO  L82        PathProgramCache]: Analyzing trace with hash -675949199, now seen corresponding path program 1 times
[2019-10-13 18:00:33,060 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:33,060 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470452200]
[2019-10-13 18:00:33,060 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:33,061 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:33,061 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:33,126 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:33,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:33,258 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:33,316 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:33,369 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:33,615 INFO  L134       CoverageAnalysis]: Checked inductivity of 333 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked.
[2019-10-13 18:00:33,616 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470452200]
[2019-10-13 18:00:33,617 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241213282]
[2019-10-13 18:00:33,617 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
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
[2019-10-13 18:00:33,743 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:33,745 INFO  L256         TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 18:00:33,751 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:33,830 INFO  L134       CoverageAnalysis]: Checked inductivity of 333 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked.
[2019-10-13 18:00:33,831 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:33,831 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9
[2019-10-13 18:00:33,831 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334526198]
[2019-10-13 18:00:33,832 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 18:00:33,832 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:33,833 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 18:00:33,833 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2019-10-13 18:00:33,833 INFO  L87              Difference]: Start difference. First operand 10316 states and 13348 transitions. Second operand 3 states.
[2019-10-13 18:00:35,029 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:35,030 INFO  L93              Difference]: Finished difference Result 22331 states and 29475 transitions.
[2019-10-13 18:00:35,030 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 18:00:35,030 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 325
[2019-10-13 18:00:35,031 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:35,079 INFO  L225             Difference]: With dead ends: 22331
[2019-10-13 18:00:35,079 INFO  L226             Difference]: Without dead ends: 12021
[2019-10-13 18:00:35,104 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2019-10-13 18:00:35,118 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12021 states.
[2019-10-13 18:00:35,362 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12021 to 12021.
[2019-10-13 18:00:35,362 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12021 states.
[2019-10-13 18:00:35,392 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12021 states to 12021 states and 15690 transitions.
[2019-10-13 18:00:35,392 INFO  L78                 Accepts]: Start accepts. Automaton has 12021 states and 15690 transitions. Word has length 325
[2019-10-13 18:00:35,393 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:35,393 INFO  L462      AbstractCegarLoop]: Abstraction has 12021 states and 15690 transitions.
[2019-10-13 18:00:35,393 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 18:00:35,393 INFO  L276                IsEmpty]: Start isEmpty. Operand 12021 states and 15690 transitions.
[2019-10-13 18:00:35,421 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 402
[2019-10-13 18:00:35,421 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:35,422 INFO  L380         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:35,626 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:35,626 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:35,626 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:35,627 INFO  L82        PathProgramCache]: Analyzing trace with hash 1454489130, now seen corresponding path program 1 times
[2019-10-13 18:00:35,627 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:35,627 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837925285]
[2019-10-13 18:00:35,627 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:35,627 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:35,628 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:35,691 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:35,780 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:35,797 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:35,833 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:35,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:36,189 INFO  L134       CoverageAnalysis]: Checked inductivity of 357 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked.
[2019-10-13 18:00:36,189 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837925285]
[2019-10-13 18:00:36,190 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849766864]
[2019-10-13 18:00:36,190 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:36,317 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:36,319 INFO  L256         TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-13 18:00:36,324 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:36,422 INFO  L134       CoverageAnalysis]: Checked inductivity of 357 backedges. 248 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked.
[2019-10-13 18:00:36,422 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:36,422 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7
[2019-10-13 18:00:36,422 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761153489]
[2019-10-13 18:00:36,423 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-10-13 18:00:36,424 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:36,424 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-10-13 18:00:36,424 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:36,424 INFO  L87              Difference]: Start difference. First operand 12021 states and 15690 transitions. Second operand 7 states.