/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-86f66a4
[2020-07-07 11:49:45,662 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2020-07-07 11:49:45,716 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-07 11:49:45,717 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
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[2020-07-07 11:49:45,736 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
[2020-07-07 11:49:45,750 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-07 11:49:45,750 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-07 11:49:45,752 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-07 11:49:45,752 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-07 11:49:45,752 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-07 11:49:45,752 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-07 11:49:45,752 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-07 11:49:45,753 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-07 11:49:45,753 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-07 11:49:45,753 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-07 11:49:45,753 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-07 11:49:45,753 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-07 11:49:45,754 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-07 11:49:45,754 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-07 11:49:45,754 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-07 11:49:45,754 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-07 11:49:45,754 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-07 11:49:45,755 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-07 11:49:45,755 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-07 11:49:45,755 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-07 11:49:45,755 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-07 11:49:45,755 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-07 11:49:45,756 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-07 11:49:45,756 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-07 11:49:45,756 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-07 11:49:45,756 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-07 11:49:45,756 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-07 11:49:45,756 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-07 11:49:45,757 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-07 11:49:45,757 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2020-07-07 11:49:46,042 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-07 11:49:46,053 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-07 11:49:46,057 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-07 11:49:46,059 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-07 11:49:46,059 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-07 11:49:46,060 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c
[2020-07-07 11:49:46,128 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7808bacb9/290ad5279eb942eaa9432c7015f8f6e8/FLAGe53700de9
[2020-07-07 11:49:46,859 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-07 11:49:46,860 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c
[2020-07-07 11:49:46,902 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7808bacb9/290ad5279eb942eaa9432c7015f8f6e8/FLAGe53700de9
[2020-07-07 11:49:46,962 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7808bacb9/290ad5279eb942eaa9432c7015f8f6e8
[2020-07-07 11:49:46,971 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-07 11:49:46,973 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-07 11:49:46,976 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-07 11:49:46,976 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-07 11:49:46,980 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-07 11:49:46,982 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:49:46" (1/1) ...
[2020-07-07 11:49:46,985 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69d9f4b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:46, skipping insertion in model container
[2020-07-07 11:49:46,985 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:49:46" (1/1) ...
[2020-07-07 11:49:46,993 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-07 11:49:47,182 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-07 11:49:48,989 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-07 11:49:49,003 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-07 11:49:50,048 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-07 11:49:50,087 INFO  L208         MainTranslator]: Completed translation
[2020-07-07 11:49:50,088 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50 WrapperNode
[2020-07-07 11:49:50,089 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-07 11:49:50,089 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-07 11:49:50,090 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-07 11:49:50,090 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-07 11:49:50,104 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50" (1/1) ...
[2020-07-07 11:49:50,106 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50" (1/1) ...
[2020-07-07 11:49:50,160 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50" (1/1) ...
[2020-07-07 11:49:50,160 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50" (1/1) ...
[2020-07-07 11:49:50,229 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50" (1/1) ...
[2020-07-07 11:49:50,270 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50" (1/1) ...
[2020-07-07 11:49:50,285 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50" (1/1) ...
[2020-07-07 11:49:50,307 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-07 11:49:50,307 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-07 11:49:50,308 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-07 11:49:50,308 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-07 11:49:50,309 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50" (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
[2020-07-07 11:49:50,380 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-07 11:49:50,381 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-07 11:49:50,381 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-07 11:49:50,381 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-07 11:49:50,382 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-07 11:49:50,382 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-07-07 11:49:50,382 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-07 11:49:50,382 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-07-07 11:49:50,383 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-07 11:49:50,383 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-07 11:49:50,383 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-07-07 11:49:50,384 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-07-07 11:49:50,384 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-07-07 11:49:50,385 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-07-07 11:49:50,386 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-07-07 11:49:50,386 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-07-07 11:49:50,387 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2020-07-07 11:49:50,387 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-07-07 11:49:50,387 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-07-07 11:49:50,388 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-07 11:49:50,388 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-07 11:49:50,388 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-07 11:49:54,246 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-07 11:49:54,246 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-07 11:49:54,260 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:49:54 BoogieIcfgContainer
[2020-07-07 11:49:54,261 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-07 11:49:54,262 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-07 11:49:54,262 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-07 11:49:54,265 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-07 11:49:54,266 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:49:46" (1/3) ...
[2020-07-07 11:49:54,267 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e10bb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:49:54, skipping insertion in model container
[2020-07-07 11:49:54,267 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:49:50" (2/3) ...
[2020-07-07 11:49:54,267 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e10bb6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:49:54, skipping insertion in model container
[2020-07-07 11:49:54,267 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:49:54" (3/3) ...
[2020-07-07 11:49:54,269 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c
[2020-07-07 11:49:54,279 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-07-07 11:49:54,288 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-07 11:49:54,302 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-07 11:49:54,332 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-07 11:49:54,332 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-07 11:49:54,332 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-07-07 11:49:54,332 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-07 11:49:54,332 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-07 11:49:54,332 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-07 11:49:54,333 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-07 11:49:54,333 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-07 11:49:54,374 INFO  L276                IsEmpty]: Start isEmpty. Operand 1431 states.
[2020-07-07 11:49:54,424 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 488
[2020-07-07 11:49:54,425 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:49:54,426 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:49:54,427 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:49:54,433 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:49:54,433 INFO  L82        PathProgramCache]: Analyzing trace with hash -1961833088, now seen corresponding path program 1 times
[2020-07-07 11:49:54,443 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:49:54,443 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899668181]
[2020-07-07 11:49:54,444 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:49:56,694 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:49:58,573 WARN  L193               SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:49:58,594 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:49:59,210 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:49:59,211 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899668181]
[2020-07-07 11:49:59,212 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:49:59,212 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-07 11:49:59,213 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124623056]
[2020-07-07 11:49:59,220 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-07 11:49:59,220 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:49:59,235 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-07 11:49:59,235 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-07 11:49:59,238 INFO  L87              Difference]: Start difference. First operand 1431 states. Second operand 5 states.
[2020-07-07 11:50:16,052 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:50:16,053 INFO  L93              Difference]: Finished difference Result 4236 states and 7632 transitions.
[2020-07-07 11:50:16,054 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-07-07 11:50:16,056 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 487
[2020-07-07 11:50:16,058 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:50:16,092 INFO  L225             Difference]: With dead ends: 4236
[2020-07-07 11:50:16,092 INFO  L226             Difference]: Without dead ends: 2814
[2020-07-07 11:50:16,102 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-07 11:50:16,128 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2814 states.
[2020-07-07 11:50:16,307 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2812.
[2020-07-07 11:50:16,309 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2812 states.
[2020-07-07 11:50:16,323 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2812 states to 2812 states and 4639 transitions.
[2020-07-07 11:50:16,325 INFO  L78                 Accepts]: Start accepts. Automaton has 2812 states and 4639 transitions. Word has length 487
[2020-07-07 11:50:16,331 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:50:16,331 INFO  L479      AbstractCegarLoop]: Abstraction has 2812 states and 4639 transitions.
[2020-07-07 11:50:16,331 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-07 11:50:16,331 INFO  L276                IsEmpty]: Start isEmpty. Operand 2812 states and 4639 transitions.
[2020-07-07 11:50:16,350 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 490
[2020-07-07 11:50:16,350 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:50:16,351 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:50:16,351 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-07-07 11:50:16,351 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:50:16,352 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:50:16,352 INFO  L82        PathProgramCache]: Analyzing trace with hash 39211808, now seen corresponding path program 1 times
[2020-07-07 11:50:16,352 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:50:16,353 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623822735]
[2020-07-07 11:50:16,353 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:50:16,591 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:50:17,910 WARN  L193               SmtUtils]: Spent 882.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:50:17,925 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:50:18,671 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:50:18,671 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623822735]
[2020-07-07 11:50:18,672 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:50:18,672 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:50:18,673 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61787714]
[2020-07-07 11:50:18,675 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:50:18,676 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:50:18,676 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:50:18,677 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:50:18,677 INFO  L87              Difference]: Start difference. First operand 2812 states and 4639 transitions. Second operand 4 states.
[2020-07-07 11:50:37,158 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:50:37,158 INFO  L93              Difference]: Finished difference Result 8158 states and 13422 transitions.
[2020-07-07 11:50:37,159 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:50:37,159 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 489
[2020-07-07 11:50:37,161 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:50:37,189 INFO  L225             Difference]: With dead ends: 8158
[2020-07-07 11:50:37,189 INFO  L226             Difference]: Without dead ends: 5560
[2020-07-07 11:50:37,197 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:50:37,206 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5560 states.
[2020-07-07 11:50:37,397 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5560 to 5558.
[2020-07-07 11:50:37,398 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5558 states.
[2020-07-07 11:50:37,417 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5558 states to 5558 states and 9141 transitions.
[2020-07-07 11:50:37,417 INFO  L78                 Accepts]: Start accepts. Automaton has 5558 states and 9141 transitions. Word has length 489
[2020-07-07 11:50:37,419 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:50:37,420 INFO  L479      AbstractCegarLoop]: Abstraction has 5558 states and 9141 transitions.
[2020-07-07 11:50:37,421 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:50:37,421 INFO  L276                IsEmpty]: Start isEmpty. Operand 5558 states and 9141 transitions.
[2020-07-07 11:50:37,436 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 491
[2020-07-07 11:50:37,436 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:50:37,437 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:50:37,437 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-07-07 11:50:37,438 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:50:37,439 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:50:37,439 INFO  L82        PathProgramCache]: Analyzing trace with hash -960654715, now seen corresponding path program 1 times
[2020-07-07 11:50:37,439 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:50:37,440 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144080263]
[2020-07-07 11:50:37,441 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:50:37,600 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:50:38,518 WARN  L193               SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:50:38,527 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:50:38,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:50:38,723 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144080263]
[2020-07-07 11:50:38,723 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:50:38,723 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:50:38,732 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131613515]
[2020-07-07 11:50:38,734 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:50:38,735 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:50:38,735 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:50:38,735 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:50:38,736 INFO  L87              Difference]: Start difference. First operand 5558 states and 9141 transitions. Second operand 4 states.
[2020-07-07 11:50:57,898 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:50:57,899 INFO  L93              Difference]: Finished difference Result 16577 states and 27255 transitions.
[2020-07-07 11:50:57,899 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:50:57,899 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 490
[2020-07-07 11:50:57,899 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:50:57,999 INFO  L225             Difference]: With dead ends: 16577
[2020-07-07 11:50:58,000 INFO  L226             Difference]: Without dead ends: 11071
[2020-07-07 11:50:58,012 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:50:58,026 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 11071 states.
[2020-07-07 11:50:58,270 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 11071 to 5605.
[2020-07-07 11:50:58,270 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5605 states.
[2020-07-07 11:50:58,281 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5605 states to 5605 states and 9215 transitions.
[2020-07-07 11:50:58,282 INFO  L78                 Accepts]: Start accepts. Automaton has 5605 states and 9215 transitions. Word has length 490
[2020-07-07 11:50:58,282 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:50:58,282 INFO  L479      AbstractCegarLoop]: Abstraction has 5605 states and 9215 transitions.
[2020-07-07 11:50:58,282 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:50:58,282 INFO  L276                IsEmpty]: Start isEmpty. Operand 5605 states and 9215 transitions.
[2020-07-07 11:50:58,296 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 492
[2020-07-07 11:50:58,297 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:50:58,297 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:50:58,297 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-07-07 11:50:58,298 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:50:58,298 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:50:58,298 INFO  L82        PathProgramCache]: Analyzing trace with hash 1982115813, now seen corresponding path program 1 times
[2020-07-07 11:50:58,298 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:50:58,299 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806899682]
[2020-07-07 11:50:58,299 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:50:58,483 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:50:59,470 WARN  L193               SmtUtils]: Spent 735.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:50:59,478 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:50:59,813 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:50:59,814 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806899682]
[2020-07-07 11:50:59,814 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:50:59,814 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:50:59,814 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299410994]
[2020-07-07 11:50:59,815 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:50:59,815 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:50:59,815 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:50:59,816 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:50:59,816 INFO  L87              Difference]: Start difference. First operand 5605 states and 9215 transitions. Second operand 4 states.
[2020-07-07 11:51:18,620 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:51:18,620 INFO  L93              Difference]: Finished difference Result 16140 states and 26444 transitions.
[2020-07-07 11:51:18,621 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:51:18,621 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 491
[2020-07-07 11:51:18,622 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:51:18,661 INFO  L225             Difference]: With dead ends: 16140
[2020-07-07 11:51:18,661 INFO  L226             Difference]: Without dead ends: 10934
[2020-07-07 11:51:18,672 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:51:18,685 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10934 states.
[2020-07-07 11:51:19,040 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10934 to 10932.
[2020-07-07 11:51:19,040 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10932 states.
[2020-07-07 11:51:19,140 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10932 states to 10932 states and 17885 transitions.
[2020-07-07 11:51:19,141 INFO  L78                 Accepts]: Start accepts. Automaton has 10932 states and 17885 transitions. Word has length 491
[2020-07-07 11:51:19,141 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:51:19,141 INFO  L479      AbstractCegarLoop]: Abstraction has 10932 states and 17885 transitions.
[2020-07-07 11:51:19,142 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:51:19,142 INFO  L276                IsEmpty]: Start isEmpty. Operand 10932 states and 17885 transitions.
[2020-07-07 11:51:19,166 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 492
[2020-07-07 11:51:19,167 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:51:19,167 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:51:19,167 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-07-07 11:51:19,168 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:51:19,168 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:51:19,168 INFO  L82        PathProgramCache]: Analyzing trace with hash -2002117056, now seen corresponding path program 1 times
[2020-07-07 11:51:19,168 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:51:19,169 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122220254]
[2020-07-07 11:51:19,169 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:51:19,229 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:51:20,104 WARN  L193               SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:51:20,111 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:51:20,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:51:20,293 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122220254]
[2020-07-07 11:51:20,293 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:51:20,294 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:51:20,294 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112677730]
[2020-07-07 11:51:20,295 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:51:20,295 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:51:20,295 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:51:20,295 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:51:20,295 INFO  L87              Difference]: Start difference. First operand 10932 states and 17885 transitions. Second operand 4 states.
[2020-07-07 11:51:39,674 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:51:39,674 INFO  L93              Difference]: Finished difference Result 32540 states and 53210 transitions.
[2020-07-07 11:51:39,679 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:51:39,680 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 491
[2020-07-07 11:51:39,680 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:51:39,722 INFO  L225             Difference]: With dead ends: 32540
[2020-07-07 11:51:39,722 INFO  L226             Difference]: Without dead ends: 21752
[2020-07-07 11:51:39,743 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:51:39,770 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21752 states.
[2020-07-07 11:51:40,187 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21752 to 11030.
[2020-07-07 11:51:40,187 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11030 states.
[2020-07-07 11:51:40,199 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11030 states to 11030 states and 18036 transitions.
[2020-07-07 11:51:40,199 INFO  L78                 Accepts]: Start accepts. Automaton has 11030 states and 18036 transitions. Word has length 491
[2020-07-07 11:51:40,199 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:51:40,199 INFO  L479      AbstractCegarLoop]: Abstraction has 11030 states and 18036 transitions.
[2020-07-07 11:51:40,199 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:51:40,200 INFO  L276                IsEmpty]: Start isEmpty. Operand 11030 states and 18036 transitions.
[2020-07-07 11:51:40,219 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 493
[2020-07-07 11:51:40,220 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:51:40,220 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:51:40,220 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-07-07 11:51:40,221 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:51:40,221 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:51:40,221 INFO  L82        PathProgramCache]: Analyzing trace with hash 1954950484, now seen corresponding path program 1 times
[2020-07-07 11:51:40,221 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:51:40,222 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155751146]
[2020-07-07 11:51:40,222 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:51:40,277 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:51:41,138 WARN  L193               SmtUtils]: Spent 728.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:51:41,151 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:51:41,409 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:51:41,410 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155751146]
[2020-07-07 11:51:41,410 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:51:41,410 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:51:41,410 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487888297]
[2020-07-07 11:51:41,411 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:51:41,413 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:51:41,413 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:51:41,413 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:51:41,413 INFO  L87              Difference]: Start difference. First operand 11030 states and 18036 transitions. Second operand 4 states.
[2020-07-07 11:52:01,282 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:52:01,282 INFO  L93              Difference]: Finished difference Result 32675 states and 53391 transitions.
[2020-07-07 11:52:01,288 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:52:01,288 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 492
[2020-07-07 11:52:01,289 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:52:01,330 INFO  L225             Difference]: With dead ends: 32675
[2020-07-07 11:52:01,330 INFO  L226             Difference]: Without dead ends: 21869
[2020-07-07 11:52:01,352 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:52:01,380 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21869 states.
[2020-07-07 11:52:01,817 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21869 to 11147.
[2020-07-07 11:52:01,817 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11147 states.
[2020-07-07 11:52:01,829 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11147 states to 11147 states and 18182 transitions.
[2020-07-07 11:52:01,830 INFO  L78                 Accepts]: Start accepts. Automaton has 11147 states and 18182 transitions. Word has length 492
[2020-07-07 11:52:01,830 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:52:01,830 INFO  L479      AbstractCegarLoop]: Abstraction has 11147 states and 18182 transitions.
[2020-07-07 11:52:01,830 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:52:01,830 INFO  L276                IsEmpty]: Start isEmpty. Operand 11147 states and 18182 transitions.
[2020-07-07 11:52:01,848 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 494
[2020-07-07 11:52:01,848 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:52:01,849 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:52:01,849 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-07-07 11:52:01,849 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:52:01,850 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:52:01,850 INFO  L82        PathProgramCache]: Analyzing trace with hash 1783853194, now seen corresponding path program 1 times
[2020-07-07 11:52:01,850 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:52:01,850 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392884693]
[2020-07-07 11:52:01,851 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:52:02,024 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:52:03,111 WARN  L193               SmtUtils]: Spent 867.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:52:03,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:52:03,688 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:52:03,690 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392884693]
[2020-07-07 11:52:03,691 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:52:03,691 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:52:03,692 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026190503]
[2020-07-07 11:52:03,693 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:52:03,694 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:52:03,694 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:52:03,694 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:52:03,695 INFO  L87              Difference]: Start difference. First operand 11147 states and 18182 transitions. Second operand 4 states.
[2020-07-07 11:52:23,757 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:52:23,758 INFO  L93              Difference]: Finished difference Result 31726 states and 51629 transitions.
[2020-07-07 11:52:23,759 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:52:23,759 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 493
[2020-07-07 11:52:23,760 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:52:23,788 INFO  L225             Difference]: With dead ends: 31726
[2020-07-07 11:52:23,788 INFO  L226             Difference]: Without dead ends: 21548
[2020-07-07 11:52:23,805 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:52:23,824 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21548 states.
[2020-07-07 11:52:24,512 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21548 to 21546.
[2020-07-07 11:52:24,512 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21546 states.
[2020-07-07 11:52:24,536 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21546 states to 21546 states and 34987 transitions.
[2020-07-07 11:52:24,536 INFO  L78                 Accepts]: Start accepts. Automaton has 21546 states and 34987 transitions. Word has length 493
[2020-07-07 11:52:24,536 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:52:24,536 INFO  L479      AbstractCegarLoop]: Abstraction has 21546 states and 34987 transitions.
[2020-07-07 11:52:24,537 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:52:24,537 INFO  L276                IsEmpty]: Start isEmpty. Operand 21546 states and 34987 transitions.
[2020-07-07 11:52:24,560 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 494
[2020-07-07 11:52:24,561 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:52:24,561 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:52:24,561 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-07-07 11:52:24,561 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:52:24,561 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:52:24,562 INFO  L82        PathProgramCache]: Analyzing trace with hash 1122991245, now seen corresponding path program 1 times
[2020-07-07 11:52:24,562 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:52:24,562 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024875156]
[2020-07-07 11:52:24,562 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:52:25,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:52:26,888 WARN  L193               SmtUtils]: Spent 745.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:52:26,896 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:52:27,251 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:52:27,251 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024875156]
[2020-07-07 11:52:27,252 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:52:27,252 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-07 11:52:27,252 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861323417]
[2020-07-07 11:52:27,253 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-07 11:52:27,253 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:52:27,253 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-07 11:52:27,254 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-07 11:52:27,254 INFO  L87              Difference]: Start difference. First operand 21546 states and 34987 transitions. Second operand 5 states.
[2020-07-07 11:52:44,024 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:52:44,024 INFO  L93              Difference]: Finished difference Result 50854 states and 83138 transitions.
[2020-07-07 11:52:44,025 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-07 11:52:44,025 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 493
[2020-07-07 11:52:44,026 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:52:44,062 INFO  L225             Difference]: With dead ends: 50854
[2020-07-07 11:52:44,062 INFO  L226             Difference]: Without dead ends: 26010
[2020-07-07 11:52:44,108 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-07 11:52:44,127 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26010 states.
[2020-07-07 11:52:44,967 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 26008.
[2020-07-07 11:52:44,967 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26008 states.
[2020-07-07 11:52:44,996 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26008 states to 26008 states and 42390 transitions.
[2020-07-07 11:52:44,997 INFO  L78                 Accepts]: Start accepts. Automaton has 26008 states and 42390 transitions. Word has length 493
[2020-07-07 11:52:44,997 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:52:44,997 INFO  L479      AbstractCegarLoop]: Abstraction has 26008 states and 42390 transitions.
[2020-07-07 11:52:44,997 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-07 11:52:44,997 INFO  L276                IsEmpty]: Start isEmpty. Operand 26008 states and 42390 transitions.
[2020-07-07 11:52:45,020 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 494
[2020-07-07 11:52:45,020 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:52:45,020 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:52:45,020 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-07-07 11:52:45,021 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:52:45,021 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:52:45,021 INFO  L82        PathProgramCache]: Analyzing trace with hash -979225654, now seen corresponding path program 1 times
[2020-07-07 11:52:45,021 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:52:45,021 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167471131]
[2020-07-07 11:52:45,021 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:52:45,222 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:52:46,456 WARN  L193               SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:52:46,462 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:52:46,667 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:52:46,667 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167471131]
[2020-07-07 11:52:46,668 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:52:46,668 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:52:46,668 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859133166]
[2020-07-07 11:52:46,669 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:52:46,669 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:52:46,670 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:52:46,670 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:52:46,671 INFO  L87              Difference]: Start difference. First operand 26008 states and 42390 transitions. Second operand 4 states.
[2020-07-07 11:53:01,523 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:53:01,524 INFO  L93              Difference]: Finished difference Result 46676 states and 75064 transitions.
[2020-07-07 11:53:01,525 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:53:01,525 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 493
[2020-07-07 11:53:01,525 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:53:01,562 INFO  L225             Difference]: With dead ends: 46676
[2020-07-07 11:53:01,562 INFO  L226             Difference]: Without dead ends: 33210
[2020-07-07 11:53:01,578 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:53:01,604 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33210 states.
[2020-07-07 11:53:02,557 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33210 to 29048.
[2020-07-07 11:53:02,558 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 29048 states.
[2020-07-07 11:53:02,592 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29048 states to 29048 states and 47370 transitions.
[2020-07-07 11:53:02,592 INFO  L78                 Accepts]: Start accepts. Automaton has 29048 states and 47370 transitions. Word has length 493
[2020-07-07 11:53:02,593 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:53:02,593 INFO  L479      AbstractCegarLoop]: Abstraction has 29048 states and 47370 transitions.
[2020-07-07 11:53:02,593 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:53:02,593 INFO  L276                IsEmpty]: Start isEmpty. Operand 29048 states and 47370 transitions.
[2020-07-07 11:53:02,623 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 496
[2020-07-07 11:53:02,624 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:53:02,624 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:53:02,624 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-07-07 11:53:02,625 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:53:02,625 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:53:02,625 INFO  L82        PathProgramCache]: Analyzing trace with hash 175584375, now seen corresponding path program 1 times
[2020-07-07 11:53:02,625 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:53:02,626 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491375564]
[2020-07-07 11:53:02,626 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:53:02,782 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:53:04,060 WARN  L193               SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:53:04,068 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:53:04,356 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:53:04,357 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491375564]
[2020-07-07 11:53:04,357 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:53:04,357 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:53:04,357 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266991758]
[2020-07-07 11:53:04,358 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:53:04,358 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:53:04,358 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:53:04,358 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:53:04,358 INFO  L87              Difference]: Start difference. First operand 29048 states and 47370 transitions. Second operand 4 states.
[2020-07-07 11:53:27,129 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:53:27,130 INFO  L93              Difference]: Finished difference Result 85137 states and 138885 transitions.
[2020-07-07 11:53:27,131 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:53:27,131 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 495
[2020-07-07 11:53:27,131 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:53:27,201 INFO  L225             Difference]: With dead ends: 85137
[2020-07-07 11:53:27,202 INFO  L226             Difference]: Without dead ends: 57109
[2020-07-07 11:53:27,239 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:53:27,289 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57109 states.
[2020-07-07 11:53:29,418 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57109 to 57107.
[2020-07-07 11:53:29,418 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57107 states.
[2020-07-07 11:53:29,488 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57107 states to 57107 states and 92799 transitions.
[2020-07-07 11:53:29,488 INFO  L78                 Accepts]: Start accepts. Automaton has 57107 states and 92799 transitions. Word has length 495
[2020-07-07 11:53:29,489 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:53:29,489 INFO  L479      AbstractCegarLoop]: Abstraction has 57107 states and 92799 transitions.
[2020-07-07 11:53:29,489 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:53:29,489 INFO  L276                IsEmpty]: Start isEmpty. Operand 57107 states and 92799 transitions.
[2020-07-07 11:53:29,885 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 496
[2020-07-07 11:53:29,885 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:53:29,886 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:53:29,886 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-07-07 11:53:29,886 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:53:29,886 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:53:29,887 INFO  L82        PathProgramCache]: Analyzing trace with hash 436421350, now seen corresponding path program 1 times
[2020-07-07 11:53:29,887 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:53:29,887 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991554301]
[2020-07-07 11:53:29,888 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:53:30,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:53:30,956 WARN  L193               SmtUtils]: Spent 770.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:53:30,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:53:31,101 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:53:31,101 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991554301]
[2020-07-07 11:53:31,101 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:53:31,101 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:53:31,102 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010296304]
[2020-07-07 11:53:31,102 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:53:31,102 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:53:31,102 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:53:31,102 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:53:31,103 INFO  L87              Difference]: Start difference. First operand 57107 states and 92799 transitions. Second operand 4 states.
[2020-07-07 11:53:47,894 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:53:47,895 INFO  L93              Difference]: Finished difference Result 104503 states and 168401 transitions.
[2020-07-07 11:53:47,896 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:53:47,896 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 495
[2020-07-07 11:53:47,896 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:53:47,971 INFO  L225             Difference]: With dead ends: 104503
[2020-07-07 11:53:47,971 INFO  L226             Difference]: Without dead ends: 74421
[2020-07-07 11:53:47,998 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:53:48,045 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 74421 states.
[2020-07-07 11:53:52,422 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 74421 to 67987.
[2020-07-07 11:53:52,423 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 67987 states.
[2020-07-07 11:53:52,502 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 67987 states to 67987 states and 110671 transitions.
[2020-07-07 11:53:52,503 INFO  L78                 Accepts]: Start accepts. Automaton has 67987 states and 110671 transitions. Word has length 495
[2020-07-07 11:53:52,503 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:53:52,503 INFO  L479      AbstractCegarLoop]: Abstraction has 67987 states and 110671 transitions.
[2020-07-07 11:53:52,503 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:53:52,503 INFO  L276                IsEmpty]: Start isEmpty. Operand 67987 states and 110671 transitions.
[2020-07-07 11:53:52,541 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 497
[2020-07-07 11:53:52,541 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:53:52,542 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:53:52,542 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-07-07 11:53:52,542 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:53:52,542 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:53:52,543 INFO  L82        PathProgramCache]: Analyzing trace with hash -925741270, now seen corresponding path program 1 times
[2020-07-07 11:53:52,543 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:53:52,543 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337546110]
[2020-07-07 11:53:52,543 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:53:52,610 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:53:53,636 WARN  L193               SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:53:53,643 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:53:53,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:53:53,799 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337546110]
[2020-07-07 11:53:53,799 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:53:53,799 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:53:53,799 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993396403]
[2020-07-07 11:53:53,800 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:53:53,800 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:53:53,800 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:53:53,800 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:53:53,800 INFO  L87              Difference]: Start difference. First operand 67987 states and 110671 transitions. Second operand 4 states.
[2020-07-07 11:54:11,273 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:54:11,273 INFO  L93              Difference]: Finished difference Result 199213 states and 324043 transitions.
[2020-07-07 11:54:11,275 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:54:11,275 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 496
[2020-07-07 11:54:11,275 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:54:11,414 INFO  L225             Difference]: With dead ends: 199213
[2020-07-07 11:54:11,414 INFO  L226             Difference]: Without dead ends: 133619
[2020-07-07 11:54:11,471 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:54:11,559 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 133619 states.
[2020-07-07 11:54:15,097 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 133619 to 68377.
[2020-07-07 11:54:15,097 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68377 states.
[2020-07-07 11:54:15,181 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68377 states to 68377 states and 111247 transitions.
[2020-07-07 11:54:15,182 INFO  L78                 Accepts]: Start accepts. Automaton has 68377 states and 111247 transitions. Word has length 496
[2020-07-07 11:54:15,182 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:54:15,182 INFO  L479      AbstractCegarLoop]: Abstraction has 68377 states and 111247 transitions.
[2020-07-07 11:54:15,182 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:54:15,182 INFO  L276                IsEmpty]: Start isEmpty. Operand 68377 states and 111247 transitions.
[2020-07-07 11:54:15,221 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 497
[2020-07-07 11:54:15,221 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:54:15,222 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:54:15,222 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-07-07 11:54:15,222 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:54:15,222 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:54:15,222 INFO  L82        PathProgramCache]: Analyzing trace with hash -1131533936, now seen corresponding path program 1 times
[2020-07-07 11:54:15,222 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:54:15,223 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646911782]
[2020-07-07 11:54:15,223 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:54:15,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:54:17,033 WARN  L193               SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:54:17,042 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:54:17,239 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:54:17,240 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646911782]
[2020-07-07 11:54:17,240 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:54:17,240 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2020-07-07 11:54:17,240 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172391871]
[2020-07-07 11:54:17,241 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-07-07 11:54:17,241 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:54:17,242 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-07-07 11:54:17,242 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2020-07-07 11:54:17,242 INFO  L87              Difference]: Start difference. First operand 68377 states and 111247 transitions. Second operand 10 states.
[2020-07-07 11:54:53,764 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:54:53,765 INFO  L93              Difference]: Finished difference Result 234575 states and 377441 transitions.
[2020-07-07 11:54:53,765 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-07-07 11:54:53,766 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 496
[2020-07-07 11:54:53,766 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:54:54,000 INFO  L225             Difference]: With dead ends: 234575
[2020-07-07 11:54:54,000 INFO  L226             Difference]: Without dead ends: 191693
[2020-07-07 11:54:54,050 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306
[2020-07-07 11:54:54,186 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 191693 states.
[2020-07-07 11:55:03,397 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 191693 to 133449.
[2020-07-07 11:55:03,397 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 133449 states.
[2020-07-07 11:55:03,573 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 133449 states to 133449 states and 212567 transitions.
[2020-07-07 11:55:03,573 INFO  L78                 Accepts]: Start accepts. Automaton has 133449 states and 212567 transitions. Word has length 496
[2020-07-07 11:55:03,574 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:55:03,574 INFO  L479      AbstractCegarLoop]: Abstraction has 133449 states and 212567 transitions.
[2020-07-07 11:55:03,574 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-07-07 11:55:03,574 INFO  L276                IsEmpty]: Start isEmpty. Operand 133449 states and 212567 transitions.
[2020-07-07 11:55:03,641 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 497
[2020-07-07 11:55:03,641 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:55:03,642 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:55:03,642 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-07-07 11:55:03,642 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:55:03,642 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:55:03,642 INFO  L82        PathProgramCache]: Analyzing trace with hash 1627764272, now seen corresponding path program 1 times
[2020-07-07 11:55:03,643 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:55:03,643 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599092738]
[2020-07-07 11:55:03,643 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:55:03,839 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:55:05,635 WARN  L193               SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:55:05,646 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:55:06,011 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:55:06,011 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599092738]
[2020-07-07 11:55:06,011 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:55:06,011 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-07-07 11:55:06,012 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525224387]
[2020-07-07 11:55:06,012 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-07-07 11:55:06,012 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:55:06,012 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-07-07 11:55:06,013 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2020-07-07 11:55:06,013 INFO  L87              Difference]: Start difference. First operand 133449 states and 212567 transitions. Second operand 10 states.
[2020-07-07 11:55:06,933 WARN  L193               SmtUtils]: Spent 838.00 ms on a formula simplification that was a NOOP. DAG size: 408
[2020-07-07 11:55:30,255 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:55:30,255 INFO  L93              Difference]: Finished difference Result 210671 states and 337017 transitions.
[2020-07-07 11:55:30,256 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-07-07 11:55:30,257 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 496
[2020-07-07 11:55:30,257 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:55:30,393 INFO  L225             Difference]: With dead ends: 210671
[2020-07-07 11:55:30,393 INFO  L226             Difference]: Without dead ends: 109842
[2020-07-07 11:55:30,463 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380
[2020-07-07 11:55:30,543 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109842 states.
[2020-07-07 11:55:35,486 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109842 to 80321.
[2020-07-07 11:55:35,486 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80321 states.
[2020-07-07 11:55:35,597 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80321 states to 80321 states and 128615 transitions.
[2020-07-07 11:55:35,598 INFO  L78                 Accepts]: Start accepts. Automaton has 80321 states and 128615 transitions. Word has length 496
[2020-07-07 11:55:35,598 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:55:35,598 INFO  L479      AbstractCegarLoop]: Abstraction has 80321 states and 128615 transitions.
[2020-07-07 11:55:35,598 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-07-07 11:55:35,598 INFO  L276                IsEmpty]: Start isEmpty. Operand 80321 states and 128615 transitions.
[2020-07-07 11:55:35,640 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 497
[2020-07-07 11:55:35,640 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:55:35,641 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:55:35,641 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2020-07-07 11:55:35,641 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:55:35,641 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:55:35,641 INFO  L82        PathProgramCache]: Analyzing trace with hash 43078897, now seen corresponding path program 1 times
[2020-07-07 11:55:35,641 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:55:35,642 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458694102]
[2020-07-07 11:55:35,642 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:55:36,618 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:55:37,654 WARN  L193               SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:55:37,660 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:55:37,965 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:55:37,965 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458694102]
[2020-07-07 11:55:37,965 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:55:37,966 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-07 11:55:37,966 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152432317]
[2020-07-07 11:55:37,966 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-07 11:55:37,967 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:55:37,967 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-07 11:55:37,967 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-07 11:55:37,967 INFO  L87              Difference]: Start difference. First operand 80321 states and 128615 transitions. Second operand 5 states.
[2020-07-07 11:56:06,835 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:56:06,836 INFO  L93              Difference]: Finished difference Result 234928 states and 376112 transitions.
[2020-07-07 11:56:06,837 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-07 11:56:06,837 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 496
[2020-07-07 11:56:06,837 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:56:07,000 INFO  L225             Difference]: With dead ends: 234928
[2020-07-07 11:56:07,000 INFO  L226             Difference]: Without dead ends: 156163
[2020-07-07 11:56:07,059 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-07 11:56:07,157 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 156163 states.
[2020-07-07 11:56:19,422 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 156163 to 156161.
[2020-07-07 11:56:19,423 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 156161 states.
[2020-07-07 11:56:19,605 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 156161 states to 156161 states and 249237 transitions.
[2020-07-07 11:56:19,605 INFO  L78                 Accepts]: Start accepts. Automaton has 156161 states and 249237 transitions. Word has length 496
[2020-07-07 11:56:19,605 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:56:19,605 INFO  L479      AbstractCegarLoop]: Abstraction has 156161 states and 249237 transitions.
[2020-07-07 11:56:19,605 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-07 11:56:19,606 INFO  L276                IsEmpty]: Start isEmpty. Operand 156161 states and 249237 transitions.
[2020-07-07 11:56:19,689 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 498
[2020-07-07 11:56:19,689 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:56:19,690 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:56:19,690 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2020-07-07 11:56:19,690 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:56:19,690 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:56:19,691 INFO  L82        PathProgramCache]: Analyzing trace with hash 775267711, now seen corresponding path program 1 times
[2020-07-07 11:56:19,691 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:56:19,691 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826162000]
[2020-07-07 11:56:19,691 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:56:20,185 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:56:21,246 WARN  L193               SmtUtils]: Spent 818.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:56:21,253 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:56:21,416 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:56:21,417 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826162000]
[2020-07-07 11:56:21,417 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:56:21,417 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-07 11:56:21,417 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565748538]
[2020-07-07 11:56:21,418 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-07 11:56:21,419 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:56:21,419 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-07 11:56:21,419 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-07-07 11:56:21,419 INFO  L87              Difference]: Start difference. First operand 156161 states and 249237 transitions. Second operand 5 states.
[2020-07-07 11:56:53,355 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:56:53,355 INFO  L93              Difference]: Finished difference Result 358147 states and 573758 transitions.
[2020-07-07 11:56:53,357 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-07 11:56:53,357 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 497
[2020-07-07 11:56:53,357 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:56:53,571 INFO  L225             Difference]: With dead ends: 358147
[2020-07-07 11:56:53,571 INFO  L226             Difference]: Without dead ends: 181401
[2020-07-07 11:56:53,678 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-07-07 11:56:53,802 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 181401 states.
[2020-07-07 11:57:08,601 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 181401 to 181399.
[2020-07-07 11:57:08,601 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 181399 states.
[2020-07-07 11:57:08,824 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 181399 states to 181399 states and 289820 transitions.
[2020-07-07 11:57:08,824 INFO  L78                 Accepts]: Start accepts. Automaton has 181399 states and 289820 transitions. Word has length 497
[2020-07-07 11:57:08,825 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:57:08,825 INFO  L479      AbstractCegarLoop]: Abstraction has 181399 states and 289820 transitions.
[2020-07-07 11:57:08,825 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-07 11:57:08,825 INFO  L276                IsEmpty]: Start isEmpty. Operand 181399 states and 289820 transitions.
[2020-07-07 11:57:08,942 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 499
[2020-07-07 11:57:08,942 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:57:08,942 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:57:08,943 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2020-07-07 11:57:08,943 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:57:08,943 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:57:08,943 INFO  L82        PathProgramCache]: Analyzing trace with hash -1196309607, now seen corresponding path program 1 times
[2020-07-07 11:57:08,943 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:57:08,944 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172161487]
[2020-07-07 11:57:08,944 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:57:09,083 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:57:10,165 WARN  L193               SmtUtils]: Spent 887.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:57:10,172 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:57:10,403 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:57:10,403 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172161487]
[2020-07-07 11:57:10,404 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:57:10,404 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 11:57:10,404 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287206609]
[2020-07-07 11:57:10,405 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 11:57:10,405 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:57:10,405 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 11:57:10,405 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:57:10,405 INFO  L87              Difference]: Start difference. First operand 181399 states and 289820 transitions. Second operand 4 states.
[2020-07-07 11:57:54,467 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 11:57:54,467 INFO  L93              Difference]: Finished difference Result 525060 states and 837778 transitions.
[2020-07-07 11:57:54,468 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-07 11:57:54,468 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 498
[2020-07-07 11:57:54,469 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 11:57:54,893 INFO  L225             Difference]: With dead ends: 525060
[2020-07-07 11:57:54,893 INFO  L226             Difference]: Without dead ends: 353508
[2020-07-07 11:57:55,038 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 11:57:55,293 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 353508 states.
[2020-07-07 11:58:25,129 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 353508 to 353506.
[2020-07-07 11:58:25,129 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 353506 states.
[2020-07-07 11:58:25,607 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 353506 states to 353506 states and 562743 transitions.
[2020-07-07 11:58:25,607 INFO  L78                 Accepts]: Start accepts. Automaton has 353506 states and 562743 transitions. Word has length 498
[2020-07-07 11:58:25,608 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 11:58:25,608 INFO  L479      AbstractCegarLoop]: Abstraction has 353506 states and 562743 transitions.
[2020-07-07 11:58:25,608 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 11:58:25,608 INFO  L276                IsEmpty]: Start isEmpty. Operand 353506 states and 562743 transitions.
[2020-07-07 11:58:26,704 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 500
[2020-07-07 11:58:26,705 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 11:58:26,705 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 11:58:26,705 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2020-07-07 11:58:26,705 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 11:58:26,706 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 11:58:26,706 INFO  L82        PathProgramCache]: Analyzing trace with hash 532673534, now seen corresponding path program 1 times
[2020-07-07 11:58:26,706 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 11:58:26,706 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30349120]
[2020-07-07 11:58:26,706 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 11:58:27,179 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:58:28,215 WARN  L193               SmtUtils]: Spent 844.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 11:58:28,223 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 11:58:28,393 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 11:58:28,394 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30349120]
[2020-07-07 11:58:28,394 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 11:58:28,394 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-07 11:58:28,394 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40116783]
[2020-07-07 11:58:28,395 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-07 11:58:28,395 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 11:58:28,395 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-07 11:58:28,395 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-07 11:58:28,396 INFO  L87              Difference]: Start difference. First operand 353506 states and 562743 transitions. Second operand 5 states.
[2020-07-07 12:00:15,749 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 12:00:15,749 INFO  L93              Difference]: Finished difference Result 1291851 states and 2046826 transitions.
[2020-07-07 12:00:15,751 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-07-07 12:00:15,751 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 499
[2020-07-07 12:00:15,751 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 12:00:17,154 INFO  L225             Difference]: With dead ends: 1291851
[2020-07-07 12:00:17,155 INFO  L226             Difference]: Without dead ends: 959785
[2020-07-07 12:00:17,464 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-07 12:00:18,136 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 959785 states.
[2020-07-07 12:01:00,848 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 959785 to 364897.
[2020-07-07 12:01:00,849 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 364897 states.
[2020-07-07 12:01:01,317 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 364897 states to 364897 states and 581519 transitions.
[2020-07-07 12:01:01,317 INFO  L78                 Accepts]: Start accepts. Automaton has 364897 states and 581519 transitions. Word has length 499
[2020-07-07 12:01:01,318 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 12:01:01,318 INFO  L479      AbstractCegarLoop]: Abstraction has 364897 states and 581519 transitions.
[2020-07-07 12:01:01,318 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-07 12:01:01,318 INFO  L276                IsEmpty]: Start isEmpty. Operand 364897 states and 581519 transitions.
[2020-07-07 12:01:01,545 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 502
[2020-07-07 12:01:01,545 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 12:01:01,546 INFO  L422         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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-07 12:01:01,546 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2020-07-07 12:01:01,546 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 12:01:01,546 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 12:01:01,546 INFO  L82        PathProgramCache]: Analyzing trace with hash -1152099056, now seen corresponding path program 1 times
[2020-07-07 12:01:01,546 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-07-07 12:01:01,547 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101253868]
[2020-07-07 12:01:01,547 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 12:01:02,159 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 12:01:03,171 WARN  L193               SmtUtils]: Spent 864.00 ms on a formula simplification that was a NOOP. DAG size: 403
[2020-07-07 12:01:03,179 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 12:01:03,324 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 12:01:03,324 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101253868]
[2020-07-07 12:01:03,324 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 12:01:03,325 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 12:01:03,325 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142328341]
[2020-07-07 12:01:03,326 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 12:01:03,326 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-07-07 12:01:03,326 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 12:01:03,326 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 12:01:03,326 INFO  L87              Difference]: Start difference. First operand 364897 states and 581519 transitions. Second operand 4 states.