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/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 19:44:33,875 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 19:44:33,878 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-13 19:44:33,891 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
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[2019-10-13 19:44:33,904 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-13 19:44:33,905 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-13 19:44:33,907 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2019-10-13 19:44:33,925 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-10-13 19:44:33,927 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 19:44:33,949 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 19:44:33,949 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 19:44:33,951 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 19:44:33,952 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 19:44:33,952 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 19:44:33,952 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 19:44:33,952 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 19:44:33,952 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 19:44:33,953 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 19:44:33,953 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 19:44:33,954 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 19:44:33,954 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 19:44:33,954 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 19:44:33,955 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 19:44:33,955 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 19:44:33,955 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 19:44:33,955 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 19:44:33,955 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 19:44:33,956 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 19:44:33,956 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 19:44:33,956 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 19:44:33,956 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 19:44:33,957 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 19:44:33,957 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 19:44:33,957 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 19:44:33,957 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 19:44:33,958 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 19:44:33,958 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 19:44:33,958 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 19:44:34,322 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 19:44:34,343 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 19:44:34,346 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 19:44:34,348 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 19:44:34,349 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 19:44:34,349 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2019-10-13 19:44:34,417 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a72ab58b1/621129d19f0949088922f000c7c010ed/FLAG8633e716c
[2019-10-13 19:44:34,924 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 19:44:34,925 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2019-10-13 19:44:34,959 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a72ab58b1/621129d19f0949088922f000c7c010ed/FLAG8633e716c
[2019-10-13 19:44:35,242 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a72ab58b1/621129d19f0949088922f000c7c010ed
[2019-10-13 19:44:35,252 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 19:44:35,254 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 19:44:35,255 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 19:44:35,255 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 19:44:35,260 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 19:44:35,261 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:44:35" (1/1) ...
[2019-10-13 19:44:35,266 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64649f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:35, skipping insertion in model container
[2019-10-13 19:44:35,266 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:44:35" (1/1) ...
[2019-10-13 19:44:35,275 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 19:44:35,360 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 19:44:36,091 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 19:44:36,104 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 19:44:36,336 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 19:44:36,376 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 19:44:36,377 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36 WrapperNode
[2019-10-13 19:44:36,378 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 19:44:36,379 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 19:44:36,379 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 19:44:36,379 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 19:44:36,399 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36" (1/1) ...
[2019-10-13 19:44:36,399 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36" (1/1) ...
[2019-10-13 19:44:36,445 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36" (1/1) ...
[2019-10-13 19:44:36,445 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36" (1/1) ...
[2019-10-13 19:44:36,498 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36" (1/1) ...
[2019-10-13 19:44:36,527 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36" (1/1) ...
[2019-10-13 19:44:36,536 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36" (1/1) ...
[2019-10-13 19:44:36,550 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 19:44:36,551 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 19:44:36,551 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 19:44:36,551 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 19:44:36,552 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 19:44:36,621 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 19:44:36,621 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 19:44:36,621 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 19:44:36,622 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 19:44:36,622 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2019-10-13 19:44:36,623 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2019-10-13 19:44:36,623 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2019-10-13 19:44:36,623 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2019-10-13 19:44:36,623 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assume
[2019-10-13 19:44:36,623 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2019-10-13 19:44:36,624 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2019-10-13 19:44:36,624 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2019-10-13 19:44:36,624 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2019-10-13 19:44:36,625 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2019-10-13 19:44:36,626 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2019-10-13 19:44:36,626 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2019-10-13 19:44:36,628 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 19:44:36,628 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 19:44:36,629 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 19:44:38,340 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 19:44:38,340 INFO  L284             CfgBuilder]: Removed 0 assume(true) statements.
[2019-10-13 19:44:38,344 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:44:38 BoogieIcfgContainer
[2019-10-13 19:44:38,344 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 19:44:38,345 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 19:44:38,346 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 19:44:38,351 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 19:44:38,351 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:44:35" (1/3) ...
[2019-10-13 19:44:38,352 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ce9642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:44:38, skipping insertion in model container
[2019-10-13 19:44:38,352 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:44:36" (2/3) ...
[2019-10-13 19:44:38,353 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23ce9642 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:44:38, skipping insertion in model container
[2019-10-13 19:44:38,353 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:44:38" (3/3) ...
[2019-10-13 19:44:38,361 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2019-10-13 19:44:38,373 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 19:44:38,392 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations.
[2019-10-13 19:44:38,402 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 5 error locations.
[2019-10-13 19:44:38,443 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 19:44:38,444 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 19:44:38,444 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 19:44:38,444 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 19:44:38,444 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 19:44:38,444 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 19:44:38,444 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 19:44:38,444 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 19:44:38,472 INFO  L276                IsEmpty]: Start isEmpty. Operand 387 states.
[2019-10-13 19:44:38,489 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 140
[2019-10-13 19:44:38,489 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:44:38,490 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:44:38,493 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:44:38,499 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:44:38,499 INFO  L82        PathProgramCache]: Analyzing trace with hash -1251267404, now seen corresponding path program 1 times
[2019-10-13 19:44:38,509 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:44:38,510 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826395193]
[2019-10-13 19:44:38,510 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:38,510 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:38,510 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:44:38,812 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:39,520 WARN  L191               SmtUtils]: Spent 339.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:44:39,528 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:39,619 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 19:44:39,620 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826395193]
[2019-10-13 19:44:39,621 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:44:39,622 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:44:39,622 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423925550]
[2019-10-13 19:44:39,629 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:44:39,629 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:44:39,646 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:44:39,647 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:44:39,649 INFO  L87              Difference]: Start difference. First operand 387 states. Second operand 4 states.
[2019-10-13 19:44:40,065 WARN  L191               SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2019-10-13 19:44:42,642 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:44:42,642 INFO  L93              Difference]: Finished difference Result 709 states and 1253 transitions.
[2019-10-13 19:44:42,643 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:44:42,645 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 139
[2019-10-13 19:44:42,646 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:44:42,670 INFO  L225             Difference]: With dead ends: 709
[2019-10-13 19:44:42,671 INFO  L226             Difference]: Without dead ends: 562
[2019-10-13 19:44:42,676 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:44:42,697 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 562 states.
[2019-10-13 19:44:42,764 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 560.
[2019-10-13 19:44:42,771 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 560 states.
[2019-10-13 19:44:42,774 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 820 transitions.
[2019-10-13 19:44:42,776 INFO  L78                 Accepts]: Start accepts. Automaton has 560 states and 820 transitions. Word has length 139
[2019-10-13 19:44:42,777 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:44:42,777 INFO  L462      AbstractCegarLoop]: Abstraction has 560 states and 820 transitions.
[2019-10-13 19:44:42,777 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:44:42,777 INFO  L276                IsEmpty]: Start isEmpty. Operand 560 states and 820 transitions.
[2019-10-13 19:44:42,782 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 140
[2019-10-13 19:44:42,782 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:44:42,783 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:44:42,783 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:44:42,784 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:44:42,784 INFO  L82        PathProgramCache]: Analyzing trace with hash 1903687668, now seen corresponding path program 1 times
[2019-10-13 19:44:42,784 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:44:42,784 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810759871]
[2019-10-13 19:44:42,785 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:42,785 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:42,785 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:44:42,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:43,226 WARN  L191               SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:44:43,232 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:43,267 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 19:44:43,267 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810759871]
[2019-10-13 19:44:43,267 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:44:43,268 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:44:43,268 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073343070]
[2019-10-13 19:44:43,270 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:44:43,270 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:44:43,271 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:44:43,271 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:44:43,271 INFO  L87              Difference]: Start difference. First operand 560 states and 820 transitions. Second operand 4 states.
[2019-10-13 19:44:43,542 WARN  L191               SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 188
[2019-10-13 19:44:45,532 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:44:45,532 INFO  L93              Difference]: Finished difference Result 1135 states and 1718 transitions.
[2019-10-13 19:44:45,533 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:44:45,533 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 139
[2019-10-13 19:44:45,534 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:44:45,542 INFO  L225             Difference]: With dead ends: 1135
[2019-10-13 19:44:45,542 INFO  L226             Difference]: Without dead ends: 934
[2019-10-13 19:44:45,548 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:44:45,551 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 934 states.
[2019-10-13 19:44:45,593 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 934 to 932.
[2019-10-13 19:44:45,594 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 932 states.
[2019-10-13 19:44:45,598 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1389 transitions.
[2019-10-13 19:44:45,599 INFO  L78                 Accepts]: Start accepts. Automaton has 932 states and 1389 transitions. Word has length 139
[2019-10-13 19:44:45,599 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:44:45,600 INFO  L462      AbstractCegarLoop]: Abstraction has 932 states and 1389 transitions.
[2019-10-13 19:44:45,600 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:44:45,600 INFO  L276                IsEmpty]: Start isEmpty. Operand 932 states and 1389 transitions.
[2019-10-13 19:44:45,604 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 140
[2019-10-13 19:44:45,604 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:44:45,604 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:44:45,605 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:44:45,605 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:44:45,605 INFO  L82        PathProgramCache]: Analyzing trace with hash 1903349044, now seen corresponding path program 1 times
[2019-10-13 19:44:45,606 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:44:45,606 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268309376]
[2019-10-13 19:44:45,606 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:45,606 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:45,607 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:44:45,794 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:46,141 WARN  L191               SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:44:46,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:46,178 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 19:44:46,178 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268309376]
[2019-10-13 19:44:46,179 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:44:46,179 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:44:46,179 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555377127]
[2019-10-13 19:44:46,180 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:44:46,180 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:44:46,180 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:44:46,181 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:44:46,181 INFO  L87              Difference]: Start difference. First operand 932 states and 1389 transitions. Second operand 5 states.
[2019-10-13 19:44:48,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:44:48,753 INFO  L93              Difference]: Finished difference Result 2722 states and 4050 transitions.
[2019-10-13 19:44:48,755 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:44:48,755 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 139
[2019-10-13 19:44:48,756 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:44:48,768 INFO  L225             Difference]: With dead ends: 2722
[2019-10-13 19:44:48,769 INFO  L226             Difference]: Without dead ends: 1803
[2019-10-13 19:44:48,774 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-13 19:44:48,778 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1803 states.
[2019-10-13 19:44:48,873 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1803 to 1761.
[2019-10-13 19:44:48,874 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1761 states.
[2019-10-13 19:44:48,888 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1761 states to 1761 states and 2610 transitions.
[2019-10-13 19:44:48,888 INFO  L78                 Accepts]: Start accepts. Automaton has 1761 states and 2610 transitions. Word has length 139
[2019-10-13 19:44:48,889 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:44:48,889 INFO  L462      AbstractCegarLoop]: Abstraction has 1761 states and 2610 transitions.
[2019-10-13 19:44:48,890 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 19:44:48,891 INFO  L276                IsEmpty]: Start isEmpty. Operand 1761 states and 2610 transitions.
[2019-10-13 19:44:48,899 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 141
[2019-10-13 19:44:48,901 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:44:48,901 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:44:48,902 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:44:48,902 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:44:48,902 INFO  L82        PathProgramCache]: Analyzing trace with hash 1746903084, now seen corresponding path program 1 times
[2019-10-13 19:44:48,903 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:44:48,903 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926074729]
[2019-10-13 19:44:48,903 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:48,904 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:48,904 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:44:48,930 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:49,281 WARN  L191               SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:44:49,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:49,314 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 19:44:49,315 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926074729]
[2019-10-13 19:44:49,315 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:44:49,315 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:44:49,315 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842354383]
[2019-10-13 19:44:49,316 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:44:49,316 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:44:49,316 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:44:49,317 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:44:49,317 INFO  L87              Difference]: Start difference. First operand 1761 states and 2610 transitions. Second operand 4 states.
[2019-10-13 19:44:52,320 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:44:52,320 INFO  L93              Difference]: Finished difference Result 5237 states and 7760 transitions.
[2019-10-13 19:44:52,321 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 19:44:52,321 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 140
[2019-10-13 19:44:52,321 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:44:52,338 INFO  L225             Difference]: With dead ends: 5237
[2019-10-13 19:44:52,338 INFO  L226             Difference]: Without dead ends: 3508
[2019-10-13 19:44:52,343 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:44:52,347 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3508 states.
[2019-10-13 19:44:52,437 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 1763.
[2019-10-13 19:44:52,437 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1763 states.
[2019-10-13 19:44:52,443 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 2612 transitions.
[2019-10-13 19:44:52,443 INFO  L78                 Accepts]: Start accepts. Automaton has 1763 states and 2612 transitions. Word has length 140
[2019-10-13 19:44:52,444 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:44:52,444 INFO  L462      AbstractCegarLoop]: Abstraction has 1763 states and 2612 transitions.
[2019-10-13 19:44:52,444 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:44:52,444 INFO  L276                IsEmpty]: Start isEmpty. Operand 1763 states and 2612 transitions.
[2019-10-13 19:44:52,447 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 142
[2019-10-13 19:44:52,447 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:44:52,448 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:44:52,448 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:44:52,448 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:44:52,449 INFO  L82        PathProgramCache]: Analyzing trace with hash 2122749224, now seen corresponding path program 1 times
[2019-10-13 19:44:52,449 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:44:52,449 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946336617]
[2019-10-13 19:44:52,450 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:52,450 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:52,450 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:44:52,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:52,870 WARN  L191               SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:44:52,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:52,939 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 19:44:52,940 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946336617]
[2019-10-13 19:44:52,940 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:44:52,940 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:44:52,940 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302196471]
[2019-10-13 19:44:52,941 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:44:52,941 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:44:52,942 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:44:52,942 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:44:52,943 INFO  L87              Difference]: Start difference. First operand 1763 states and 2612 transitions. Second operand 4 states.
[2019-10-13 19:44:55,808 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:44:55,809 INFO  L93              Difference]: Finished difference Result 4646 states and 6878 transitions.
[2019-10-13 19:44:55,813 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 19:44:55,814 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 141
[2019-10-13 19:44:55,814 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:44:55,828 INFO  L225             Difference]: With dead ends: 4646
[2019-10-13 19:44:55,828 INFO  L226             Difference]: Without dead ends: 3051
[2019-10-13 19:44:55,832 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:44:55,836 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3051 states.
[2019-10-13 19:44:55,951 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3051 to 3009.
[2019-10-13 19:44:55,951 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3009 states.
[2019-10-13 19:44:55,961 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3009 states to 3009 states and 4406 transitions.
[2019-10-13 19:44:55,961 INFO  L78                 Accepts]: Start accepts. Automaton has 3009 states and 4406 transitions. Word has length 141
[2019-10-13 19:44:55,962 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:44:55,962 INFO  L462      AbstractCegarLoop]: Abstraction has 3009 states and 4406 transitions.
[2019-10-13 19:44:55,962 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:44:55,962 INFO  L276                IsEmpty]: Start isEmpty. Operand 3009 states and 4406 transitions.
[2019-10-13 19:44:55,968 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 142
[2019-10-13 19:44:55,968 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:44:55,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:44:55,969 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:44:55,969 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:44:55,970 INFO  L82        PathProgramCache]: Analyzing trace with hash -1627018325, now seen corresponding path program 1 times
[2019-10-13 19:44:55,970 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:44:55,970 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987484954]
[2019-10-13 19:44:55,970 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:55,971 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:55,971 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:44:56,100 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:56,548 WARN  L191               SmtUtils]: Spent 326.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:44:56,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:56,589 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 19:44:56,590 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987484954]
[2019-10-13 19:44:56,590 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:44:56,591 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:44:56,591 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900262812]
[2019-10-13 19:44:56,591 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:44:56,592 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:44:56,592 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:44:56,592 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:44:56,592 INFO  L87              Difference]: Start difference. First operand 3009 states and 4406 transitions. Second operand 5 states.
[2019-10-13 19:44:58,516 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:44:58,517 INFO  L93              Difference]: Finished difference Result 6236 states and 9063 transitions.
[2019-10-13 19:44:58,517 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:44:58,517 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 141
[2019-10-13 19:44:58,519 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:44:58,534 INFO  L225             Difference]: With dead ends: 6236
[2019-10-13 19:44:58,535 INFO  L226             Difference]: Without dead ends: 3185
[2019-10-13 19:44:58,541 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:44:58,546 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3185 states.
[2019-10-13 19:44:58,666 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3185 to 3141.
[2019-10-13 19:44:58,666 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3141 states.
[2019-10-13 19:44:58,681 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3141 states to 3141 states and 4541 transitions.
[2019-10-13 19:44:58,681 INFO  L78                 Accepts]: Start accepts. Automaton has 3141 states and 4541 transitions. Word has length 141
[2019-10-13 19:44:58,682 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:44:58,682 INFO  L462      AbstractCegarLoop]: Abstraction has 3141 states and 4541 transitions.
[2019-10-13 19:44:58,683 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 19:44:58,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 3141 states and 4541 transitions.
[2019-10-13 19:44:58,688 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 142
[2019-10-13 19:44:58,688 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:44:58,688 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:44:58,689 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:44:58,689 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:44:58,690 INFO  L82        PathProgramCache]: Analyzing trace with hash -1058765613, now seen corresponding path program 1 times
[2019-10-13 19:44:58,691 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:44:58,691 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882833943]
[2019-10-13 19:44:58,691 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:58,692 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:44:58,692 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:44:58,811 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:59,149 WARN  L191               SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:44:59,154 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:44:59,193 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 19:44:59,193 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882833943]
[2019-10-13 19:44:59,194 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:44:59,194 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:44:59,195 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296984142]
[2019-10-13 19:44:59,196 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:44:59,196 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:44:59,196 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:44:59,197 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:44:59,197 INFO  L87              Difference]: Start difference. First operand 3141 states and 4541 transitions. Second operand 5 states.
[2019-10-13 19:45:01,978 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:01,979 INFO  L93              Difference]: Finished difference Result 9129 states and 13145 transitions.
[2019-10-13 19:45:01,979 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:45:01,980 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 141
[2019-10-13 19:45:01,980 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:02,006 INFO  L225             Difference]: With dead ends: 9129
[2019-10-13 19:45:02,007 INFO  L226             Difference]: Without dead ends: 6060
[2019-10-13 19:45:02,014 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-13 19:45:02,021 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6060 states.
[2019-10-13 19:45:02,349 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6060 to 6016.
[2019-10-13 19:45:02,350 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6016 states.
[2019-10-13 19:45:02,363 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6016 states to 6016 states and 8600 transitions.
[2019-10-13 19:45:02,364 INFO  L78                 Accepts]: Start accepts. Automaton has 6016 states and 8600 transitions. Word has length 141
[2019-10-13 19:45:02,366 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:02,366 INFO  L462      AbstractCegarLoop]: Abstraction has 6016 states and 8600 transitions.
[2019-10-13 19:45:02,366 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 19:45:02,366 INFO  L276                IsEmpty]: Start isEmpty. Operand 6016 states and 8600 transitions.
[2019-10-13 19:45:02,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 143
[2019-10-13 19:45:02,375 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:02,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:02,376 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:02,376 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:02,377 INFO  L82        PathProgramCache]: Analyzing trace with hash -1467508373, now seen corresponding path program 1 times
[2019-10-13 19:45:02,377 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:02,377 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786832996]
[2019-10-13 19:45:02,377 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:02,377 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:02,377 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:02,401 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:02,711 WARN  L191               SmtUtils]: Spent 260.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:45:02,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:02,743 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 19:45:02,743 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786832996]
[2019-10-13 19:45:02,743 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:02,743 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 19:45:02,745 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657661253]
[2019-10-13 19:45:02,745 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-13 19:45:02,746 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:02,747 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-13 19:45:02,748 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:02,748 INFO  L87              Difference]: Start difference. First operand 6016 states and 8600 transitions. Second operand 4 states.
[2019-10-13 19:45:04,756 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:04,756 INFO  L93              Difference]: Finished difference Result 17854 states and 25496 transitions.
[2019-10-13 19:45:04,757 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-13 19:45:04,757 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 142
[2019-10-13 19:45:04,757 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:04,801 INFO  L225             Difference]: With dead ends: 17854
[2019-10-13 19:45:04,801 INFO  L226             Difference]: Without dead ends: 11954
[2019-10-13 19:45:04,814 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-10-13 19:45:04,828 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11954 states.
[2019-10-13 19:45:05,121 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11954 to 6028.
[2019-10-13 19:45:05,122 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6028 states.
[2019-10-13 19:45:05,131 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 8612 transitions.
[2019-10-13 19:45:05,131 INFO  L78                 Accepts]: Start accepts. Automaton has 6028 states and 8612 transitions. Word has length 142
[2019-10-13 19:45:05,131 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:05,132 INFO  L462      AbstractCegarLoop]: Abstraction has 6028 states and 8612 transitions.
[2019-10-13 19:45:05,132 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-13 19:45:05,132 INFO  L276                IsEmpty]: Start isEmpty. Operand 6028 states and 8612 transitions.
[2019-10-13 19:45:05,140 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 144
[2019-10-13 19:45:05,141 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:05,141 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:05,141 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:05,142 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:05,142 INFO  L82        PathProgramCache]: Analyzing trace with hash -1015908366, now seen corresponding path program 1 times
[2019-10-13 19:45:05,142 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:05,142 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354906585]
[2019-10-13 19:45:05,142 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:05,143 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:05,143 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:05,220 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:05,601 WARN  L191               SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:45:05,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:05,643 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 19:45:05,644 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354906585]
[2019-10-13 19:45:05,644 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:05,644 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:45:05,645 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062309332]
[2019-10-13 19:45:05,645 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:45:05,645 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:05,646 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:45:05,648 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:45:05,648 INFO  L87              Difference]: Start difference. First operand 6028 states and 8612 transitions. Second operand 5 states.
[2019-10-13 19:45:08,612 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 19:45:08,612 INFO  L93              Difference]: Finished difference Result 17520 states and 24960 transitions.
[2019-10-13 19:45:08,613 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2019-10-13 19:45:08,613 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 143
[2019-10-13 19:45:08,613 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 19:45:08,637 INFO  L225             Difference]: With dead ends: 17520
[2019-10-13 19:45:08,637 INFO  L226             Difference]: Without dead ends: 11618
[2019-10-13 19:45:08,650 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-13 19:45:08,663 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11618 states.
[2019-10-13 19:45:09,284 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11618 to 11574.
[2019-10-13 19:45:09,285 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11574 states.
[2019-10-13 19:45:09,302 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11574 states to 11574 states and 16344 transitions.
[2019-10-13 19:45:09,302 INFO  L78                 Accepts]: Start accepts. Automaton has 11574 states and 16344 transitions. Word has length 143
[2019-10-13 19:45:09,303 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 19:45:09,303 INFO  L462      AbstractCegarLoop]: Abstraction has 11574 states and 16344 transitions.
[2019-10-13 19:45:09,303 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 19:45:09,303 INFO  L276                IsEmpty]: Start isEmpty. Operand 11574 states and 16344 transitions.
[2019-10-13 19:45:09,319 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 146
[2019-10-13 19:45:09,320 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 19:45:09,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:45:09,320 INFO  L410      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr4ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 19:45:09,320 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 19:45:09,321 INFO  L82        PathProgramCache]: Analyzing trace with hash 152789353, now seen corresponding path program 1 times
[2019-10-13 19:45:09,324 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 19:45:09,325 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602604233]
[2019-10-13 19:45:09,325 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:09,325 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 19:45:09,325 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 19:45:09,388 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:09,672 WARN  L191               SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 187
[2019-10-13 19:45:09,676 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 19:45:09,710 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 19:45:09,711 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602604233]
[2019-10-13 19:45:09,711 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 19:45:09,711 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-13 19:45:09,711 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930754510]
[2019-10-13 19:45:09,712 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 19:45:09,712 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 19:45:09,712 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 19:45:09,712 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-13 19:45:09,713 INFO  L87              Difference]: Start difference. First operand 11574 states and 16344 transitions. Second operand 5 states.