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_label23.c


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This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 18:00:01,133 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-13 18:00:01,209 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 18:00:01,223 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 18:00:01,223 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 18:00:01,225 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 18:00:01,225 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 18:00:01,225 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 18:00:01,225 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 18:00:01,225 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 18:00:01,226 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 18:00:01,226 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 18:00:01,226 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 18:00:01,226 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 18:00:01,226 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 18:00:01,227 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 18:00:01,227 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 18:00:01,227 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 18:00:01,227 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 18:00:01,227 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 18:00:01,228 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 18:00:01,228 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 18:00:01,228 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 18:00:01,228 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 18:00:01,229 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 18:00:01,229 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 18:00:01,229 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 18:00:01,229 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 18:00:01,229 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 18:00:01,230 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 18:00:01,230 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 18:00:01,230 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 18:00:01,540 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 18:00:01,561 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 18:00:01,565 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 18:00:01,567 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 18:00:01,567 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 18:00:01,568 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label23.c
[2019-10-13 18:00:01,650 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800148109/0b44f75a3ff64fe38e5753c399cd611a/FLAG9518fbe3e
[2019-10-13 18:00:02,427 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 18:00:02,430 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label23.c
[2019-10-13 18:00:02,446 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800148109/0b44f75a3ff64fe38e5753c399cd611a/FLAG9518fbe3e
[2019-10-13 18:00:02,486 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800148109/0b44f75a3ff64fe38e5753c399cd611a
[2019-10-13 18:00:02,498 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 18:00:02,500 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 18:00:02,503 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 18:00:02,503 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 18:00:02,507 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 18:00:02,509 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:02" (1/1) ...
[2019-10-13 18:00:02,512 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@405f9137 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 18:00:02,513 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:02" (1/1) ...
[2019-10-13 18:00:02,521 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 18:00:02,597 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 18:00:03,470 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:00:03,482 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 18:00:03,659 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:00:03,676 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 18:00:03,677 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:03 WrapperNode
[2019-10-13 18:00:03,677 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 18:00:03,678 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 18:00:03,678 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 18:00:03,678 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 18:00:03,690 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 18:00:03,690 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 18:00:03,723 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 18:00:03,723 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 18:00:03,799 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 18:00:03,814 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 18:00:03,832 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 18:00:03,856 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 18:00:03,856 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 18:00:03,857 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 18:00:03,857 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 18:00:03,861 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 18:00:03,943 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 18:00:03,944 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 18:00:03,944 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 18:00:03,944 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 18:00:03,944 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 18:00:03,945 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 18:00:03,946 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 18:00:03,946 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 18:00:03,947 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 18:00:03,947 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 18:00:03,947 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 18:00:05,712 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 18:00:05,713 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 18:00:05,715 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:05 BoogieIcfgContainer
[2019-10-13 18:00:05,716 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 18:00:05,717 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 18:00:05,717 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 18:00:05,722 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 18:00:05,723 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:02" (1/3) ...
[2019-10-13 18:00:05,724 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1a6ddb 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 18:00:05,724 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 18:00:05,725 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b1a6ddb 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 18:00:05,726 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 18:00:05,733 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label23.c
[2019-10-13 18:00:05,745 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 18:00:05,758 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 18:00:05,769 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 18:00:05,812 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 18:00:05,813 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 18:00:05,814 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 18:00:05,814 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 18:00:05,815 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 18:00:05,815 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 18:00:05,815 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 18:00:05,815 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 18:00:05,850 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-10-13 18:00:05,863 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 72
[2019-10-13 18:00:05,863 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:05,864 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, 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 18:00:05,868 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:05,874 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:05,875 INFO  L82        PathProgramCache]: Analyzing trace with hash -1552063366, now seen corresponding path program 1 times
[2019-10-13 18:00:05,916 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:05,917 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088255829]
[2019-10-13 18:00:05,917 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:05,917 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:05,917 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:06,133 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:06,366 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:06,398 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 18:00:06,399 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088255829]
[2019-10-13 18:00:06,400 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:00:06,400 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 18:00:06,400 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361218309]
[2019-10-13 18:00:06,405 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:00:06,405 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:06,419 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:00:06,420 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:00:06,422 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-10-13 18:00:09,544 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:09,544 INFO  L93              Difference]: Finished difference Result 998 states and 1793 transitions.
[2019-10-13 18:00:09,545 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:09,547 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 71
[2019-10-13 18:00:09,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:09,571 INFO  L225             Difference]: With dead ends: 998
[2019-10-13 18:00:09,571 INFO  L226             Difference]: Without dead ends: 638
[2019-10-13 18:00:09,582 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:09,607 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 638 states.
[2019-10-13 18:00:09,711 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 621.
[2019-10-13 18:00:09,713 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 621 states.
[2019-10-13 18:00:09,717 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 950 transitions.
[2019-10-13 18:00:09,720 INFO  L78                 Accepts]: Start accepts. Automaton has 621 states and 950 transitions. Word has length 71
[2019-10-13 18:00:09,722 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:09,722 INFO  L462      AbstractCegarLoop]: Abstraction has 621 states and 950 transitions.
[2019-10-13 18:00:09,723 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:09,723 INFO  L276                IsEmpty]: Start isEmpty. Operand 621 states and 950 transitions.
[2019-10-13 18:00:09,741 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 142
[2019-10-13 18:00:09,742 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:09,742 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, 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]
[2019-10-13 18:00:09,743 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:09,744 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:09,744 INFO  L82        PathProgramCache]: Analyzing trace with hash 1937579030, now seen corresponding path program 1 times
[2019-10-13 18:00:09,745 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:09,745 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978636737]
[2019-10-13 18:00:09,745 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:09,745 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:09,746 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:09,818 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:09,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:09,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:10,142 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:10,143 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978636737]
[2019-10-13 18:00:10,144 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:00:10,144 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-13 18:00:10,144 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576018264]
[2019-10-13 18:00:10,149 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 18:00:10,149 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:10,150 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 18:00:10,150 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-13 18:00:10,151 INFO  L87              Difference]: Start difference. First operand 621 states and 950 transitions. Second operand 8 states.
[2019-10-13 18:00:14,064 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:14,065 INFO  L93              Difference]: Finished difference Result 2487 states and 4246 transitions.
[2019-10-13 18:00:14,065 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-13 18:00:14,065 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 141
[2019-10-13 18:00:14,066 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:14,087 INFO  L225             Difference]: With dead ends: 2487
[2019-10-13 18:00:14,087 INFO  L226             Difference]: Without dead ends: 1872
[2019-10-13 18:00:14,091 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182
[2019-10-13 18:00:14,095 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1872 states.
[2019-10-13 18:00:14,190 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1816.
[2019-10-13 18:00:14,190 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1816 states.
[2019-10-13 18:00:14,202 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2597 transitions.
[2019-10-13 18:00:14,202 INFO  L78                 Accepts]: Start accepts. Automaton has 1816 states and 2597 transitions. Word has length 141
[2019-10-13 18:00:14,205 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:14,205 INFO  L462      AbstractCegarLoop]: Abstraction has 1816 states and 2597 transitions.
[2019-10-13 18:00:14,205 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-13 18:00:14,205 INFO  L276                IsEmpty]: Start isEmpty. Operand 1816 states and 2597 transitions.
[2019-10-13 18:00:14,212 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 152
[2019-10-13 18:00:14,213 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:14,213 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, 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]
[2019-10-13 18:00:14,214 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:14,214 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:14,214 INFO  L82        PathProgramCache]: Analyzing trace with hash 1983928202, now seen corresponding path program 1 times
[2019-10-13 18:00:14,215 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:14,216 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298281135]
[2019-10-13 18:00:14,216 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:14,216 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:14,216 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:14,261 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:14,357 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:14,387 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:14,510 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:14,510 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298281135]
[2019-10-13 18:00:14,511 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:00:14,511 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-13 18:00:14,511 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748436040]
[2019-10-13 18:00:14,513 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 18:00:14,513 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:14,514 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 18:00:14,515 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-13 18:00:14,518 INFO  L87              Difference]: Start difference. First operand 1816 states and 2597 transitions. Second operand 8 states.
[2019-10-13 18:00:17,406 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:17,406 INFO  L93              Difference]: Finished difference Result 5268 states and 7936 transitions.
[2019-10-13 18:00:17,406 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2019-10-13 18:00:17,415 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 151
[2019-10-13 18:00:17,416 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:17,439 INFO  L225             Difference]: With dead ends: 5268
[2019-10-13 18:00:17,440 INFO  L226             Difference]: Without dead ends: 3458
[2019-10-13 18:00:17,447 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-10-13 18:00:17,452 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3458 states.
[2019-10-13 18:00:17,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 3233.
[2019-10-13 18:00:17,564 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3233 states.
[2019-10-13 18:00:17,579 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4504 transitions.
[2019-10-13 18:00:17,580 INFO  L78                 Accepts]: Start accepts. Automaton has 3233 states and 4504 transitions. Word has length 151
[2019-10-13 18:00:17,582 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:17,583 INFO  L462      AbstractCegarLoop]: Abstraction has 3233 states and 4504 transitions.
[2019-10-13 18:00:17,583 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-13 18:00:17,584 INFO  L276                IsEmpty]: Start isEmpty. Operand 3233 states and 4504 transitions.
[2019-10-13 18:00:17,591 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 215
[2019-10-13 18:00:17,591 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:17,592 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:17,592 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:17,592 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:17,593 INFO  L82        PathProgramCache]: Analyzing trace with hash -1698562555, now seen corresponding path program 1 times
[2019-10-13 18:00:17,593 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:17,593 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491920759]
[2019-10-13 18:00:17,593 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:17,593 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:17,593 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:17,644 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:17,741 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:17,768 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:17,798 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:17,899 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-13 18:00:17,900 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491920759]
[2019-10-13 18:00:17,900 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222266284]
[2019-10-13 18:00:17,900 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 18:00:18,047 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:18,049 INFO  L256         TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-10-13 18:00:18,061 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:18,119 INFO  L134       CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:18,120 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:18,120 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8
[2019-10-13 18:00:18,120 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461086864]
[2019-10-13 18:00:18,121 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 18:00:18,121 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:18,121 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 18:00:18,122 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-13 18:00:18,122 INFO  L87              Difference]: Start difference. First operand 3233 states and 4504 transitions. Second operand 8 states.
[2019-10-13 18:00:20,551 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:20,552 INFO  L93              Difference]: Finished difference Result 6540 states and 9942 transitions.
[2019-10-13 18:00:20,552 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-10-13 18:00:20,553 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 214
[2019-10-13 18:00:20,554 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:20,573 INFO  L225             Difference]: With dead ends: 6540
[2019-10-13 18:00:20,573 INFO  L226             Difference]: Without dead ends: 3313
[2019-10-13 18:00:20,585 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-10-13 18:00:20,589 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3313 states.
[2019-10-13 18:00:20,669 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2993.
[2019-10-13 18:00:20,669 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2993 states.
[2019-10-13 18:00:20,678 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 3905 transitions.
[2019-10-13 18:00:20,678 INFO  L78                 Accepts]: Start accepts. Automaton has 2993 states and 3905 transitions. Word has length 214
[2019-10-13 18:00:20,679 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:20,679 INFO  L462      AbstractCegarLoop]: Abstraction has 2993 states and 3905 transitions.
[2019-10-13 18:00:20,679 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-13 18:00:20,679 INFO  L276                IsEmpty]: Start isEmpty. Operand 2993 states and 3905 transitions.
[2019-10-13 18:00:20,684 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 225
[2019-10-13 18:00:20,685 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:20,685 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, 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]
[2019-10-13 18:00:20,901 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:20,901 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:20,901 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:20,902 INFO  L82        PathProgramCache]: Analyzing trace with hash 1529010873, now seen corresponding path program 1 times
[2019-10-13 18:00:20,902 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:20,902 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124779639]
[2019-10-13 18:00:20,902 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:20,902 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:20,902 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:20,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,069 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,093 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,149 INFO  L134       CoverageAnalysis]: Checked inductivity of 201 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-10-13 18:00:21,150 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124779639]
[2019-10-13 18:00:21,150 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932318636]
[2019-10-13 18:00:21,150 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 18:00:21,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:21,243 INFO  L256         TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 18:00:21,249 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:21,398 INFO  L134       CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-10-13 18:00:21,399 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:21,399 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5
[2019-10-13 18:00:21,400 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417970619]
[2019-10-13 18:00:21,400 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 18:00:21,401 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:21,402 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 18:00:21,402 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:00:21,402 INFO  L87              Difference]: Start difference. First operand 2993 states and 3905 transitions. Second operand 3 states.
[2019-10-13 18:00:22,447 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:22,448 INFO  L93              Difference]: Finished difference Result 7518 states and 10149 transitions.
[2019-10-13 18:00:22,448 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 18:00:22,448 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 224
[2019-10-13 18:00:22,449 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:22,470 INFO  L225             Difference]: With dead ends: 7518
[2019-10-13 18:00:22,471 INFO  L226             Difference]: Without dead ends: 4531
[2019-10-13 18:00:22,479 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 229 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:00:22,485 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4531 states.
[2019-10-13 18:00:22,579 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 4139.
[2019-10-13 18:00:22,580 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4139 states.
[2019-10-13 18:00:22,587 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5492 transitions.
[2019-10-13 18:00:22,588 INFO  L78                 Accepts]: Start accepts. Automaton has 4139 states and 5492 transitions. Word has length 224
[2019-10-13 18:00:22,588 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:22,589 INFO  L462      AbstractCegarLoop]: Abstraction has 4139 states and 5492 transitions.
[2019-10-13 18:00:22,589 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 18:00:22,589 INFO  L276                IsEmpty]: Start isEmpty. Operand 4139 states and 5492 transitions.
[2019-10-13 18:00:22,596 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 276
[2019-10-13 18:00:22,597 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:22,597 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, 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, 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 18:00:22,801 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:22,801 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:22,802 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:22,802 INFO  L82        PathProgramCache]: Analyzing trace with hash 2030409120, now seen corresponding path program 1 times
[2019-10-13 18:00:22,802 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:22,802 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404320964]
[2019-10-13 18:00:22,802 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:22,803 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:22,803 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:22,855 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:22,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:23,010 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:23,056 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:23,385 INFO  L134       CoverageAnalysis]: Checked inductivity of 202 backedges. 133 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-13 18:00:23,386 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404320964]
[2019-10-13 18:00:23,386 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463146667]
[2019-10-13 18:00:23,387 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 18:00:23,500 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:23,502 INFO  L256         TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-10-13 18:00:23,508 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:23,587 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-13 18:00:23,678 INFO  L134       CoverageAnalysis]: Checked inductivity of 202 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked.
[2019-10-13 18:00:23,678 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:23,678 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12
[2019-10-13 18:00:23,679 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874755346]
[2019-10-13 18:00:23,679 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:00:23,680 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:23,680 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:00:23,680 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2019-10-13 18:00:23,680 INFO  L87              Difference]: Start difference. First operand 4139 states and 5492 transitions. Second operand 5 states.
[2019-10-13 18:00:25,203 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:25,203 INFO  L93              Difference]: Finished difference Result 8337 states and 11181 transitions.
[2019-10-13 18:00:25,204 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:25,204 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 275
[2019-10-13 18:00:25,204 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:25,224 INFO  L225             Difference]: With dead ends: 8337
[2019-10-13 18:00:25,224 INFO  L226             Difference]: Without dead ends: 4204
[2019-10-13 18:00:25,234 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2019-10-13 18:00:25,238 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4204 states.
[2019-10-13 18:00:25,344 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 4155.
[2019-10-13 18:00:25,344 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4155 states.
[2019-10-13 18:00:25,351 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5503 transitions.
[2019-10-13 18:00:25,351 INFO  L78                 Accepts]: Start accepts. Automaton has 4155 states and 5503 transitions. Word has length 275
[2019-10-13 18:00:25,352 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:25,352 INFO  L462      AbstractCegarLoop]: Abstraction has 4155 states and 5503 transitions.
[2019-10-13 18:00:25,352 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:25,352 INFO  L276                IsEmpty]: Start isEmpty. Operand 4155 states and 5503 transitions.
[2019-10-13 18:00:25,360 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 310
[2019-10-13 18:00:25,360 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:25,360 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, 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, 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]
[2019-10-13 18:00:25,564 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:25,565 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:25,565 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:25,565 INFO  L82        PathProgramCache]: Analyzing trace with hash 624431733, now seen corresponding path program 1 times
[2019-10-13 18:00:25,565 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:25,566 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104641758]
[2019-10-13 18:00:25,566 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:25,566 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:25,566 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:25,641 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:25,728 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:25,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:25,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:25,909 INFO  L134       CoverageAnalysis]: Checked inductivity of 235 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-10-13 18:00:25,910 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104641758]
[2019-10-13 18:00:25,910 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999197010]
[2019-10-13 18:00:25,910 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 18:00:26,060 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:26,061 INFO  L256         TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-13 18:00:26,066 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:26,173 INFO  L134       CoverageAnalysis]: Checked inductivity of 235 backedges. 168 proven. 63 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-10-13 18:00:26,174 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:26,175 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7
[2019-10-13 18:00:26,176 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025246202]
[2019-10-13 18:00:26,177 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-10-13 18:00:26,177 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:26,177 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-10-13 18:00:26,178 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:26,178 INFO  L87              Difference]: Start difference. First operand 4155 states and 5503 transitions. Second operand 7 states.
[2019-10-13 18:00:28,074 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:28,075 INFO  L93              Difference]: Finished difference Result 8394 states and 11573 transitions.
[2019-10-13 18:00:28,075 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:28,075 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 309
[2019-10-13 18:00:28,078 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:28,098 INFO  L225             Difference]: With dead ends: 8394
[2019-10-13 18:00:28,099 INFO  L226             Difference]: Without dead ends: 4245
[2019-10-13 18:00:28,109 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2019-10-13 18:00:28,115 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4245 states.
[2019-10-13 18:00:28,299 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 4155.
[2019-10-13 18:00:28,299 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4155 states.
[2019-10-13 18:00:28,317 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5231 transitions.
[2019-10-13 18:00:28,318 INFO  L78                 Accepts]: Start accepts. Automaton has 4155 states and 5231 transitions. Word has length 309
[2019-10-13 18:00:28,319 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:28,319 INFO  L462      AbstractCegarLoop]: Abstraction has 4155 states and 5231 transitions.
[2019-10-13 18:00:28,319 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-10-13 18:00:28,319 INFO  L276                IsEmpty]: Start isEmpty. Operand 4155 states and 5231 transitions.
[2019-10-13 18:00:28,335 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 316
[2019-10-13 18:00:28,336 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:28,336 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, 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, 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]
[2019-10-13 18:00:28,541 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:28,541 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:28,542 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:28,544 INFO  L82        PathProgramCache]: Analyzing trace with hash -1568781761, now seen corresponding path program 1 times
[2019-10-13 18:00:28,545 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:28,545 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451917158]
[2019-10-13 18:00:28,546 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:28,547 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:28,547 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:28,617 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:28,745 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:28,767 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:28,818 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:28,928 INFO  L134       CoverageAnalysis]: Checked inductivity of 239 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked.
[2019-10-13 18:00:28,929 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451917158]
[2019-10-13 18:00:28,929 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550724470]
[2019-10-13 18:00:28,929 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 18:00:29,052 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:29,055 INFO  L256         TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-10-13 18:00:29,062 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:29,086 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:29,088 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:30,332 WARN  L191               SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 24 DAG size of output: 22
[2019-10-13 18:00:30,384 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:00:32,560 INFO  L134       CoverageAnalysis]: Checked inductivity of 239 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2019-10-13 18:00:32,560 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:32,561 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11
[2019-10-13 18:00:32,561 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861319533]
[2019-10-13 18:00:32,562 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-13 18:00:32,562 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:32,563 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-13 18:00:32,563 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=84, Unknown=1, NotChecked=0, Total=110
[2019-10-13 18:00:32,563 INFO  L87              Difference]: Start difference. First operand 4155 states and 5231 transitions. Second operand 11 states.