/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 15:00:59,342 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 15:00:59,344 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 15:00:59,362 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 15:00:59,362 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 15:00:59,365 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 15:00:59,367 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 15:00:59,380 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 15:00:59,381 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 15:00:59,383 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 15:00:59,384 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 15:00:59,386 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 15:00:59,386 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 15:00:59,390 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 15:00:59,392 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 15:00:59,394 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 15:00:59,396 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 15:00:59,398 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 15:00:59,399 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 15:00:59,405 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 15:00:59,409 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 15:00:59,410 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 15:00:59,411 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 15:00:59,413 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 15:00:59,415 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 15:00:59,416 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 15:00:59,416 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 15:00:59,418 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 15:00:59,419 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 15:00:59,420 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 15:00:59,420 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 15:00:59,422 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 15:00:59,422 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 15:00:59,423 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 15:00:59,427 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 15:00:59,428 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 15:00:59,428 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 15:00:59,428 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 15:00:59,429 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 15:00:59,429 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 15:00:59,431 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 15:00:59,432 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
[2020-07-20 15:00:59,454 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 15:00:59,454 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 15:00:59,456 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 15:00:59,456 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 15:00:59,457 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 15:00:59,457 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 15:00:59,457 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 15:00:59,457 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 15:00:59,457 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 15:00:59,458 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 15:00:59,459 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 15:00:59,459 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 15:00:59,459 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 15:00:59,460 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 15:00:59,460 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 15:00:59,460 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 15:00:59,460 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 15:00:59,461 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 15:00:59,461 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 15:00:59,461 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 15:00:59,461 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 15:00:59,461 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 15:00:59,462 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 15:00:59,462 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 15:00:59,462 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 15:00:59,462 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 15:00:59,462 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:00:59,463 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 15:00:59,463 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 15:00:59,463 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 15:00:59,766 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 15:00:59,779 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 15:00:59,783 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 15:00:59,784 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 15:00:59,785 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 15:00:59,786 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c
[2020-07-20 15:00:59,848 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6927c88a8/3956033463f24a1cbff32a7974627fb6/FLAG63cf3f8dd
[2020-07-20 15:01:00,574 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 15:01:00,575 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c
[2020-07-20 15:01:00,607 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6927c88a8/3956033463f24a1cbff32a7974627fb6/FLAG63cf3f8dd
[2020-07-20 15:01:00,688 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6927c88a8/3956033463f24a1cbff32a7974627fb6
[2020-07-20 15:01:00,697 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 15:01:00,699 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 15:01:00,700 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 15:01:00,700 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 15:01:00,704 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 15:01:00,705 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:01:00" (1/1) ...
[2020-07-20 15:01:00,708 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5da7f1fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:00, skipping insertion in model container
[2020-07-20 15:01:00,708 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:01:00" (1/1) ...
[2020-07-20 15:01:00,715 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 15:01:00,889 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 15:01:02,391 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 15:01:02,415 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 15:01:04,028 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 15:01:04,064 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 15:01:04,065 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04 WrapperNode
[2020-07-20 15:01:04,066 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 15:01:04,067 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 15:01:04,067 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 15:01:04,067 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 15:01:04,082 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04" (1/1) ...
[2020-07-20 15:01:04,084 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04" (1/1) ...
[2020-07-20 15:01:04,140 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04" (1/1) ...
[2020-07-20 15:01:04,142 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04" (1/1) ...
[2020-07-20 15:01:04,209 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04" (1/1) ...
[2020-07-20 15:01:04,264 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04" (1/1) ...
[2020-07-20 15:01:04,287 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04" (1/1) ...
[2020-07-20 15:01:04,312 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 15:01:04,314 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 15:01:04,314 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 15:01:04,314 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 15:01:04,316 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04" (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
[2020-07-20 15:01:04,411 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 15:01:04,411 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 15:01:04,411 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 15:01:04,411 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 15:01:04,412 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 15:01:04,412 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-07-20 15:01:04,413 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-20 15:01:04,413 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-07-20 15:01:04,413 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 15:01:04,413 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 15:01:04,414 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-07-20 15:01:04,415 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-07-20 15:01:04,415 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-07-20 15:01:04,415 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-07-20 15:01:04,415 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-07-20 15:01:04,416 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-07-20 15:01:04,417 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2020-07-20 15:01:04,417 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-07-20 15:01:04,417 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-07-20 15:01:04,418 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 15:01:04,418 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 15:01:04,418 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 15:01:08,967 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 15:01:08,967 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 15:01:08,981 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:01:08 BoogieIcfgContainer
[2020-07-20 15:01:08,982 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 15:01:08,983 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 15:01:08,983 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 15:01:08,987 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 15:01:08,987 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:01:00" (1/3) ...
[2020-07-20 15:01:08,988 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281bf312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:01:08, skipping insertion in model container
[2020-07-20 15:01:08,988 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:01:04" (2/3) ...
[2020-07-20 15:01:08,988 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@281bf312 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:01:08, skipping insertion in model container
[2020-07-20 15:01:08,989 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:01:08" (3/3) ...
[2020-07-20 15:01:08,991 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c
[2020-07-20 15:01:09,005 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 15:01:09,018 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations.
[2020-07-20 15:01:09,033 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2020-07-20 15:01:09,068 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 15:01:09,068 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 15:01:09,068 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 15:01:09,069 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 15:01:09,069 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 15:01:09,069 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 15:01:09,069 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 15:01:09,069 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 15:01:09,117 INFO  L276                IsEmpty]: Start isEmpty. Operand 1371 states.
[2020-07-20 15:01:09,155 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 465
[2020-07-20 15:01:09,155 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:09,157 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]
[2020-07-20 15:01:09,158 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:09,164 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:09,165 INFO  L82        PathProgramCache]: Analyzing trace with hash -856462850, now seen corresponding path program 1 times
[2020-07-20 15:01:09,177 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:09,177 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438980557]
[2020-07-20 15:01:09,178 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:09,840 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:01:09,841 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:09,850 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1626 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 15:01:09,873 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:10,309 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:10,309 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:10,310 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438980557]
[2020-07-20 15:01:10,311 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:10,311 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 15:01:10,312 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996436876]
[2020-07-20 15:01:10,319 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 15:01:10,319 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:10,332 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 15:01:10,332 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-20 15:01:10,335 INFO  L87              Difference]: Start difference. First operand 1371 states. Second operand 4 states.
[2020-07-20 15:01:10,809 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:10,809 INFO  L93              Difference]: Finished difference Result 4059 states and 7350 transitions.
[2020-07-20 15:01:10,810 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-20 15:01:10,811 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 464
[2020-07-20 15:01:10,813 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:10,848 INFO  L225             Difference]: With dead ends: 4059
[2020-07-20 15:01:10,848 INFO  L226             Difference]: Without dead ends: 2697
[2020-07-20 15:01:10,859 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-20 15:01:10,888 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2697 states.
[2020-07-20 15:01:11,033 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2647.
[2020-07-20 15:01:11,035 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2647 states.
[2020-07-20 15:01:11,048 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4347 transitions.
[2020-07-20 15:01:11,050 INFO  L78                 Accepts]: Start accepts. Automaton has 2647 states and 4347 transitions. Word has length 464
[2020-07-20 15:01:11,051 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:11,051 INFO  L479      AbstractCegarLoop]: Abstraction has 2647 states and 4347 transitions.
[2020-07-20 15:01:11,051 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 15:01:11,052 INFO  L276                IsEmpty]: Start isEmpty. Operand 2647 states and 4347 transitions.
[2020-07-20 15:01:11,066 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 467
[2020-07-20 15:01:11,067 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:11,067 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]
[2020-07-20 15:01:11,282 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:11,282 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:11,283 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:11,284 INFO  L82        PathProgramCache]: Analyzing trace with hash -1286826198, now seen corresponding path program 1 times
[2020-07-20 15:01:11,285 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:11,285 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91495102]
[2020-07-20 15:01:11,286 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:11,829 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:01:11,830 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:11,837 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1629 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:01:11,849 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:12,111 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:12,111 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:12,111 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91495102]
[2020-07-20 15:01:12,112 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:12,112 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:01:12,112 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478266781]
[2020-07-20 15:01:12,114 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:01:12,115 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:12,115 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:01:12,115 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:12,115 INFO  L87              Difference]: Start difference. First operand 2647 states and 4347 transitions. Second operand 3 states.
[2020-07-20 15:01:12,479 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:12,480 INFO  L93              Difference]: Finished difference Result 7670 states and 12560 transitions.
[2020-07-20 15:01:12,480 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:01:12,481 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 466
[2020-07-20 15:01:12,484 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:12,518 INFO  L225             Difference]: With dead ends: 7670
[2020-07-20 15:01:12,519 INFO  L226             Difference]: Without dead ends: 5237
[2020-07-20 15:01:12,527 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:12,538 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5237 states.
[2020-07-20 15:01:12,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5189.
[2020-07-20 15:01:12,812 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5189 states.
[2020-07-20 15:01:12,842 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 8497 transitions.
[2020-07-20 15:01:12,843 INFO  L78                 Accepts]: Start accepts. Automaton has 5189 states and 8497 transitions. Word has length 466
[2020-07-20 15:01:12,845 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:12,848 INFO  L479      AbstractCegarLoop]: Abstraction has 5189 states and 8497 transitions.
[2020-07-20 15:01:12,849 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:01:12,849 INFO  L276                IsEmpty]: Start isEmpty. Operand 5189 states and 8497 transitions.
[2020-07-20 15:01:12,863 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 468
[2020-07-20 15:01:12,864 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:12,864 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]
[2020-07-20 15:01:13,077 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:13,078 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:13,079 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:13,079 INFO  L82        PathProgramCache]: Analyzing trace with hash -244647039, now seen corresponding path program 1 times
[2020-07-20 15:01:13,079 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:13,080 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583887566]
[2020-07-20 15:01:13,080 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:13,974 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:01:13,974 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:13,983 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:01:13,998 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:14,315 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:14,316 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:14,316 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583887566]
[2020-07-20 15:01:14,317 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:14,317 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:01:14,318 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060907122]
[2020-07-20 15:01:14,319 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:01:14,320 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:14,320 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:01:14,321 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:14,322 INFO  L87              Difference]: Start difference. First operand 5189 states and 8497 transitions. Second operand 3 states.
[2020-07-20 15:01:14,720 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:14,721 INFO  L93              Difference]: Finished difference Result 15470 states and 25323 transitions.
[2020-07-20 15:01:14,721 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:01:14,721 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 467
[2020-07-20 15:01:14,722 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:14,774 INFO  L225             Difference]: With dead ends: 15470
[2020-07-20 15:01:14,774 INFO  L226             Difference]: Without dead ends: 10333
[2020-07-20 15:01:14,791 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:14,804 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10333 states.
[2020-07-20 15:01:15,072 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10333 to 5236.
[2020-07-20 15:01:15,072 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5236 states.
[2020-07-20 15:01:15,087 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8571 transitions.
[2020-07-20 15:01:15,088 INFO  L78                 Accepts]: Start accepts. Automaton has 5236 states and 8571 transitions. Word has length 467
[2020-07-20 15:01:15,088 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:15,088 INFO  L479      AbstractCegarLoop]: Abstraction has 5236 states and 8571 transitions.
[2020-07-20 15:01:15,088 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:01:15,088 INFO  L276                IsEmpty]: Start isEmpty. Operand 5236 states and 8571 transitions.
[2020-07-20 15:01:15,102 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 469
[2020-07-20 15:01:15,102 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:15,103 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]
[2020-07-20 15:01:15,317 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:15,318 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:15,318 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:15,318 INFO  L82        PathProgramCache]: Analyzing trace with hash 536524677, now seen corresponding path program 1 times
[2020-07-20 15:01:15,319 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:15,319 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518582192]
[2020-07-20 15:01:15,319 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:15,860 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:01:15,860 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:15,868 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1630 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:01:15,878 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:16,127 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:16,127 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:16,127 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518582192]
[2020-07-20 15:01:16,128 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:16,128 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:01:16,128 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347495978]
[2020-07-20 15:01:16,129 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:01:16,129 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:16,129 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:01:16,130 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:16,130 INFO  L87              Difference]: Start difference. First operand 5236 states and 8571 transitions. Second operand 3 states.
[2020-07-20 15:01:16,670 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:16,671 INFO  L93              Difference]: Finished difference Result 15048 states and 24542 transitions.
[2020-07-20 15:01:16,671 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:01:16,671 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 468
[2020-07-20 15:01:16,672 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:16,715 INFO  L225             Difference]: With dead ends: 15048
[2020-07-20 15:01:16,716 INFO  L226             Difference]: Without dead ends: 10211
[2020-07-20 15:01:16,726 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:16,738 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10211 states.
[2020-07-20 15:01:17,093 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 10165.
[2020-07-20 15:01:17,094 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10165 states.
[2020-07-20 15:01:17,115 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 16557 transitions.
[2020-07-20 15:01:17,115 INFO  L78                 Accepts]: Start accepts. Automaton has 10165 states and 16557 transitions. Word has length 468
[2020-07-20 15:01:17,116 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:17,116 INFO  L479      AbstractCegarLoop]: Abstraction has 10165 states and 16557 transitions.
[2020-07-20 15:01:17,116 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:01:17,116 INFO  L276                IsEmpty]: Start isEmpty. Operand 10165 states and 16557 transitions.
[2020-07-20 15:01:17,140 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 469
[2020-07-20 15:01:17,140 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:17,141 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]
[2020-07-20 15:01:17,353 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:17,354 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:17,354 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:17,355 INFO  L82        PathProgramCache]: Analyzing trace with hash 1157993354, now seen corresponding path program 1 times
[2020-07-20 15:01:17,355 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:17,356 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698293432]
[2020-07-20 15:01:17,356 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:17,950 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 15:01:17,950 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:17,958 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:01:17,970 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:18,181 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:18,181 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:18,181 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698293432]
[2020-07-20 15:01:18,182 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:18,182 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:01:18,182 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510304109]
[2020-07-20 15:01:18,183 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:01:18,183 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:18,184 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:01:18,184 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:18,184 INFO  L87              Difference]: Start difference. First operand 10165 states and 16557 transitions. Second operand 3 states.
[2020-07-20 15:01:18,662 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:18,662 INFO  L93              Difference]: Finished difference Result 30225 states and 49195 transitions.
[2020-07-20 15:01:18,663 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:01:18,663 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 468
[2020-07-20 15:01:18,663 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:18,715 INFO  L225             Difference]: With dead ends: 30225
[2020-07-20 15:01:18,719 INFO  L226             Difference]: Without dead ends: 20199
[2020-07-20 15:01:18,746 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:18,771 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20199 states.
[2020-07-20 15:01:19,155 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20199 to 10244.
[2020-07-20 15:01:19,155 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10244 states.
[2020-07-20 15:01:19,171 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10244 states to 10244 states and 16662 transitions.
[2020-07-20 15:01:19,171 INFO  L78                 Accepts]: Start accepts. Automaton has 10244 states and 16662 transitions. Word has length 468
[2020-07-20 15:01:19,172 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:19,172 INFO  L479      AbstractCegarLoop]: Abstraction has 10244 states and 16662 transitions.
[2020-07-20 15:01:19,172 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:01:19,172 INFO  L276                IsEmpty]: Start isEmpty. Operand 10244 states and 16662 transitions.
[2020-07-20 15:01:19,197 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 470
[2020-07-20 15:01:19,197 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:19,198 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]
[2020-07-20 15:01:19,410 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:19,411 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:19,411 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:19,411 INFO  L82        PathProgramCache]: Analyzing trace with hash -903588472, now seen corresponding path program 1 times
[2020-07-20 15:01:19,411 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:19,412 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705721661]
[2020-07-20 15:01:19,412 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:20,466 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:01:20,467 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:20,473 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:01:20,481 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:20,572 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:20,573 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:20,573 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705721661]
[2020-07-20 15:01:20,573 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:20,574 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:01:20,574 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865896915]
[2020-07-20 15:01:20,575 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:01:20,575 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:20,575 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:01:20,575 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:20,575 INFO  L87              Difference]: Start difference. First operand 10244 states and 16662 transitions. Second operand 3 states.
[2020-07-20 15:01:21,036 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:21,037 INFO  L93              Difference]: Finished difference Result 30385 states and 49416 transitions.
[2020-07-20 15:01:21,037 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:01:21,037 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 469
[2020-07-20 15:01:21,037 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:21,092 INFO  L225             Difference]: With dead ends: 30385
[2020-07-20 15:01:21,093 INFO  L226             Difference]: Without dead ends: 20335
[2020-07-20 15:01:21,122 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:21,148 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20335 states.
[2020-07-20 15:01:21,591 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20335 to 10380.
[2020-07-20 15:01:21,591 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10380 states.
[2020-07-20 15:01:21,603 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 16854 transitions.
[2020-07-20 15:01:21,603 INFO  L78                 Accepts]: Start accepts. Automaton has 10380 states and 16854 transitions. Word has length 469
[2020-07-20 15:01:21,603 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:21,603 INFO  L479      AbstractCegarLoop]: Abstraction has 10380 states and 16854 transitions.
[2020-07-20 15:01:21,604 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:01:21,604 INFO  L276                IsEmpty]: Start isEmpty. Operand 10380 states and 16854 transitions.
[2020-07-20 15:01:21,622 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 471
[2020-07-20 15:01:21,622 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:21,623 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]
[2020-07-20 15:01:21,837 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:21,838 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:21,839 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:21,839 INFO  L82        PathProgramCache]: Analyzing trace with hash 2073063424, now seen corresponding path program 1 times
[2020-07-20 15:01:21,840 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:21,840 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458464344]
[2020-07-20 15:01:21,841 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:22,318 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:01:22,319 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:22,324 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1633 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:01:22,333 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:22,531 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:22,531 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:22,531 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458464344]
[2020-07-20 15:01:22,531 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:22,531 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:01:22,532 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986716608]
[2020-07-20 15:01:22,532 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:01:22,532 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:22,533 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:01:22,533 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:22,533 INFO  L87              Difference]: Start difference. First operand 10380 states and 16854 transitions. Second operand 3 states.
[2020-07-20 15:01:23,145 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:23,145 INFO  L93              Difference]: Finished difference Result 29456 states and 47707 transitions.
[2020-07-20 15:01:23,145 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:01:23,146 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 470
[2020-07-20 15:01:23,152 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:23,208 INFO  L225             Difference]: With dead ends: 29456
[2020-07-20 15:01:23,208 INFO  L226             Difference]: Without dead ends: 20045
[2020-07-20 15:01:23,232 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:23,251 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20045 states.
[2020-07-20 15:01:23,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20045 to 20001.
[2020-07-20 15:01:23,877 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 20001 states.
[2020-07-20 15:01:23,900 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 32327 transitions.
[2020-07-20 15:01:23,901 INFO  L78                 Accepts]: Start accepts. Automaton has 20001 states and 32327 transitions. Word has length 470
[2020-07-20 15:01:23,901 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:23,901 INFO  L479      AbstractCegarLoop]: Abstraction has 20001 states and 32327 transitions.
[2020-07-20 15:01:23,901 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:01:23,902 INFO  L276                IsEmpty]: Start isEmpty. Operand 20001 states and 32327 transitions.
[2020-07-20 15:01:23,933 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 471
[2020-07-20 15:01:23,933 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:23,934 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]
[2020-07-20 15:01:24,144 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:24,144 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:24,145 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:24,145 INFO  L82        PathProgramCache]: Analyzing trace with hash 1777003357, now seen corresponding path program 1 times
[2020-07-20 15:01:24,146 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:24,146 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760937892]
[2020-07-20 15:01:24,147 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:24,676 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 15:01:24,676 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:24,681 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1431 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-20 15:01:24,691 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:24,820 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:24,820 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:24,820 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760937892]
[2020-07-20 15:01:24,821 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:24,821 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 15:01:24,821 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057766941]
[2020-07-20 15:01:24,822 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 15:01:24,822 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:24,823 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 15:01:24,823 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-20 15:01:24,823 INFO  L87              Difference]: Start difference. First operand 20001 states and 32327 transitions. Second operand 4 states.
[2020-07-20 15:01:26,734 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:26,734 INFO  L93              Difference]: Finished difference Result 55373 states and 89008 transitions.
[2020-07-20 15:01:26,735 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 15:01:26,735 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 470
[2020-07-20 15:01:26,735 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:26,784 INFO  L225             Difference]: With dead ends: 55373
[2020-07-20 15:01:26,784 INFO  L226             Difference]: Without dead ends: 37652
[2020-07-20 15:01:26,824 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-20 15:01:26,867 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37652 states.
[2020-07-20 15:01:27,899 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37652 to 21294.
[2020-07-20 15:01:27,900 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21294 states.
[2020-07-20 15:01:27,923 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21294 states to 21294 states and 34606 transitions.
[2020-07-20 15:01:27,923 INFO  L78                 Accepts]: Start accepts. Automaton has 21294 states and 34606 transitions. Word has length 470
[2020-07-20 15:01:27,924 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:27,924 INFO  L479      AbstractCegarLoop]: Abstraction has 21294 states and 34606 transitions.
[2020-07-20 15:01:27,924 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 15:01:27,924 INFO  L276                IsEmpty]: Start isEmpty. Operand 21294 states and 34606 transitions.
[2020-07-20 15:01:27,945 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 474
[2020-07-20 15:01:27,945 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:27,946 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]
[2020-07-20 15:01:28,146 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:28,147 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:28,148 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:28,148 INFO  L82        PathProgramCache]: Analyzing trace with hash -72931109, now seen corresponding path program 1 times
[2020-07-20 15:01:28,149 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:28,149 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465228719]
[2020-07-20 15:01:28,150 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:28,683 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 15:01:28,683 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:28,686 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:01:28,693 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:28,807 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:28,807 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:28,807 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465228719]
[2020-07-20 15:01:28,808 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:28,808 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:01:28,808 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524200871]
[2020-07-20 15:01:28,809 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:01:28,809 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:28,809 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:01:28,810 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:28,810 INFO  L87              Difference]: Start difference. First operand 21294 states and 34606 transitions. Second operand 3 states.
[2020-07-20 15:01:30,528 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:30,529 INFO  L93              Difference]: Finished difference Result 56867 states and 91363 transitions.
[2020-07-20 15:01:30,529 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:01:30,529 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 473
[2020-07-20 15:01:30,530 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:30,581 INFO  L225             Difference]: With dead ends: 56867
[2020-07-20 15:01:30,581 INFO  L226             Difference]: Without dead ends: 39095
[2020-07-20 15:01:30,604 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:30,642 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39095 states.
[2020-07-20 15:01:31,333 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39095 to 21758.
[2020-07-20 15:01:31,333 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 21758 states.
[2020-07-20 15:01:31,359 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 21758 states to 21758 states and 35316 transitions.
[2020-07-20 15:01:31,359 INFO  L78                 Accepts]: Start accepts. Automaton has 21758 states and 35316 transitions. Word has length 473
[2020-07-20 15:01:31,359 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:31,359 INFO  L479      AbstractCegarLoop]: Abstraction has 21758 states and 35316 transitions.
[2020-07-20 15:01:31,359 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:01:31,359 INFO  L276                IsEmpty]: Start isEmpty. Operand 21758 states and 35316 transitions.
[2020-07-20 15:01:31,377 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 475
[2020-07-20 15:01:31,377 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:31,377 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]
[2020-07-20 15:01:31,586 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:31,587 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:31,587 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:31,588 INFO  L82        PathProgramCache]: Analyzing trace with hash -1995052696, now seen corresponding path program 1 times
[2020-07-20 15:01:31,588 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:31,589 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544165264]
[2020-07-20 15:01:31,589 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:32,062 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 15:01:32,062 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:32,068 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 15:01:32,075 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:32,229 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:32,230 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:32,230 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544165264]
[2020-07-20 15:01:32,230 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:32,230 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 15:01:32,231 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374716558]
[2020-07-20 15:01:32,231 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 15:01:32,232 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:32,232 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 15:01:32,232 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-20 15:01:32,232 INFO  L87              Difference]: Start difference. First operand 21758 states and 35316 transitions. Second operand 4 states.
[2020-07-20 15:01:33,371 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:33,372 INFO  L93              Difference]: Finished difference Result 51271 states and 83469 transitions.
[2020-07-20 15:01:33,372 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 15:01:33,372 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 474
[2020-07-20 15:01:33,372 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:33,411 INFO  L225             Difference]: With dead ends: 51271
[2020-07-20 15:01:33,411 INFO  L226             Difference]: Without dead ends: 26863
[2020-07-20 15:01:33,447 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-20 15:01:33,472 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26863 states.
[2020-07-20 15:01:34,562 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26863 to 26819.
[2020-07-20 15:01:34,562 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26819 states.
[2020-07-20 15:01:34,592 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26819 states to 26819 states and 43620 transitions.
[2020-07-20 15:01:34,593 INFO  L78                 Accepts]: Start accepts. Automaton has 26819 states and 43620 transitions. Word has length 474
[2020-07-20 15:01:34,593 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:34,593 INFO  L479      AbstractCegarLoop]: Abstraction has 26819 states and 43620 transitions.
[2020-07-20 15:01:34,593 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 15:01:34,593 INFO  L276                IsEmpty]: Start isEmpty. Operand 26819 states and 43620 transitions.
[2020-07-20 15:01:34,620 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 477
[2020-07-20 15:01:34,621 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:34,621 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]
[2020-07-20 15:01:34,834 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:34,835 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:34,835 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:34,836 INFO  L82        PathProgramCache]: Analyzing trace with hash -2045453381, now seen corresponding path program 1 times
[2020-07-20 15:01:34,836 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:34,837 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1052425043]
[2020-07-20 15:01:34,837 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:35,363 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:01:35,363 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:35,369 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1650 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 15:01:35,375 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:35,630 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:35,631 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:35,631 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1052425043]
[2020-07-20 15:01:35,631 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:35,631 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 15:01:35,632 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491106667]
[2020-07-20 15:01:35,633 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 15:01:35,633 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:35,633 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 15:01:35,633 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-20 15:01:35,633 INFO  L87              Difference]: Start difference. First operand 26819 states and 43620 transitions. Second operand 4 states.
[2020-07-20 15:01:38,078 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:38,079 INFO  L93              Difference]: Finished difference Result 78663 states and 127976 transitions.
[2020-07-20 15:01:38,080 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 15:01:38,080 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 476
[2020-07-20 15:01:38,080 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:38,136 INFO  L225             Difference]: With dead ends: 78663
[2020-07-20 15:01:38,136 INFO  L226             Difference]: Without dead ends: 52583
[2020-07-20 15:01:38,171 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-20 15:01:38,218 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52583 states.
[2020-07-20 15:01:40,056 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52583 to 52545.
[2020-07-20 15:01:40,056 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52545 states.
[2020-07-20 15:01:40,123 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52545 states to 52545 states and 85040 transitions.
[2020-07-20 15:01:40,123 INFO  L78                 Accepts]: Start accepts. Automaton has 52545 states and 85040 transitions. Word has length 476
[2020-07-20 15:01:40,124 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:40,124 INFO  L479      AbstractCegarLoop]: Abstraction has 52545 states and 85040 transitions.
[2020-07-20 15:01:40,124 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 15:01:40,124 INFO  L276                IsEmpty]: Start isEmpty. Operand 52545 states and 85040 transitions.
[2020-07-20 15:01:40,182 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 479
[2020-07-20 15:01:40,183 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:40,183 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]
[2020-07-20 15:01:40,396 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:40,397 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:40,397 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:40,398 INFO  L82        PathProgramCache]: Analyzing trace with hash 892089167, now seen corresponding path program 1 times
[2020-07-20 15:01:40,398 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:40,398 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286242740]
[2020-07-20 15:01:40,399 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:40,913 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:01:40,913 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:40,919 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:01:40,926 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:41,324 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:41,325 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:41,325 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286242740]
[2020-07-20 15:01:41,325 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:41,325 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:01:41,326 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332856665]
[2020-07-20 15:01:41,332 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:01:41,332 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:41,332 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:01:41,333 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:41,333 INFO  L87              Difference]: Start difference. First operand 52545 states and 85040 transitions. Second operand 3 states.
[2020-07-20 15:01:45,963 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:45,963 INFO  L93              Difference]: Finished difference Result 151928 states and 245430 transitions.
[2020-07-20 15:01:45,964 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:01:45,964 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 478
[2020-07-20 15:01:45,964 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:46,071 INFO  L225             Difference]: With dead ends: 151928
[2020-07-20 15:01:46,071 INFO  L226             Difference]: Without dead ends: 103269
[2020-07-20 15:01:46,116 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 476 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:46,184 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 103269 states.
[2020-07-20 15:01:49,828 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 103269 to 103228.
[2020-07-20 15:01:49,828 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 103228 states.
[2020-07-20 15:01:49,954 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 103228 states to 103228 states and 166393 transitions.
[2020-07-20 15:01:49,954 INFO  L78                 Accepts]: Start accepts. Automaton has 103228 states and 166393 transitions. Word has length 478
[2020-07-20 15:01:49,955 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:01:49,955 INFO  L479      AbstractCegarLoop]: Abstraction has 103228 states and 166393 transitions.
[2020-07-20 15:01:49,955 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:01:49,955 INFO  L276                IsEmpty]: Start isEmpty. Operand 103228 states and 166393 transitions.
[2020-07-20 15:01:50,037 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 480
[2020-07-20 15:01:50,037 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:01:50,037 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]
[2020-07-20 15:01:50,238 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:50,238 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:01:50,238 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:01:50,239 INFO  L82        PathProgramCache]: Analyzing trace with hash -1439608733, now seen corresponding path program 1 times
[2020-07-20 15:01:50,239 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:01:50,240 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031445285]
[2020-07-20 15:01:50,240 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:01:50,765 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:01:50,765 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:01:50,770 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1654 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:01:50,776 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:01:50,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:01:50,901 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:01:50,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031445285]
[2020-07-20 15:01:50,902 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:01:50,902 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:01:50,902 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487681587]
[2020-07-20 15:01:50,903 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:01:50,903 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:01:50,904 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:01:50,904 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:50,904 INFO  L87              Difference]: Start difference. First operand 103228 states and 166393 transitions. Second operand 3 states.
[2020-07-20 15:01:59,175 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:01:59,176 INFO  L93              Difference]: Finished difference Result 304442 states and 490218 transitions.
[2020-07-20 15:01:59,176 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:01:59,176 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 479
[2020-07-20 15:01:59,176 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:01:59,383 INFO  L225             Difference]: With dead ends: 304442
[2020-07-20 15:01:59,383 INFO  L226             Difference]: Without dead ends: 202318
[2020-07-20 15:01:59,458 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:01:59,583 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 202318 states.
[2020-07-20 15:02:03,819 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 202318 to 103526.
[2020-07-20 15:02:03,819 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 103526 states.
[2020-07-20 15:02:03,954 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 103526 states to 103526 states and 166823 transitions.
[2020-07-20 15:02:03,954 INFO  L78                 Accepts]: Start accepts. Automaton has 103526 states and 166823 transitions. Word has length 479
[2020-07-20 15:02:03,954 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:02:03,954 INFO  L479      AbstractCegarLoop]: Abstraction has 103526 states and 166823 transitions.
[2020-07-20 15:02:03,954 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:02:03,955 INFO  L276                IsEmpty]: Start isEmpty. Operand 103526 states and 166823 transitions.
[2020-07-20 15:02:04,044 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 481
[2020-07-20 15:02:04,045 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:02:04,045 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]
[2020-07-20 15:02:04,245 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:02:04,246 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:02:04,246 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:02:04,247 INFO  L82        PathProgramCache]: Analyzing trace with hash -861800310, now seen corresponding path program 1 times
[2020-07-20 15:02:04,247 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:02:04,248 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359656638]
[2020-07-20 15:02:04,248 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:02:04,766 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:02:04,766 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:02:04,773 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:02:04,779 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:02:06,766 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:02:06,766 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:02:06,766 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359656638]
[2020-07-20 15:02:06,767 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:02:06,767 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:02:06,767 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426038771]
[2020-07-20 15:02:06,767 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:02:06,768 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:02:06,768 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:02:06,768 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:02:06,768 INFO  L87              Difference]: Start difference. First operand 103526 states and 166823 transitions. Second operand 3 states.
[2020-07-20 15:02:14,356 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:02:14,356 INFO  L93              Difference]: Finished difference Result 304233 states and 489850 transitions.
[2020-07-20 15:02:14,357 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:02:14,357 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 480
[2020-07-20 15:02:14,357 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:02:14,585 INFO  L225             Difference]: With dead ends: 304233
[2020-07-20 15:02:14,585 INFO  L226             Difference]: Without dead ends: 205034
[2020-07-20 15:02:14,668 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:02:14,799 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 205034 states.
[2020-07-20 15:02:26,600 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 205034 to 204998.
[2020-07-20 15:02:26,600 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 204998 states.
[2020-07-20 15:02:26,879 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 204998 states to 204998 states and 328910 transitions.
[2020-07-20 15:02:26,879 INFO  L78                 Accepts]: Start accepts. Automaton has 204998 states and 328910 transitions. Word has length 480
[2020-07-20 15:02:26,880 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:02:26,880 INFO  L479      AbstractCegarLoop]: Abstraction has 204998 states and 328910 transitions.
[2020-07-20 15:02:26,880 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:02:26,880 INFO  L276                IsEmpty]: Start isEmpty. Operand 204998 states and 328910 transitions.
[2020-07-20 15:02:27,057 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 481
[2020-07-20 15:02:27,057 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:02:27,058 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]
[2020-07-20 15:02:27,266 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:02:27,267 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:02:27,267 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:02:27,268 INFO  L82        PathProgramCache]: Analyzing trace with hash -630855857, now seen corresponding path program 1 times
[2020-07-20 15:02:27,268 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:02:27,268 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897552951]
[2020-07-20 15:02:27,269 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:02:27,709 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 15:02:27,709 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:02:27,713 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1446 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:02:27,719 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:02:27,805 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:02:27,806 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:02:27,806 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897552951]
[2020-07-20 15:02:27,806 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:02:27,806 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:02:27,806 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11737477]
[2020-07-20 15:02:27,807 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:02:27,807 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:02:27,807 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:02:27,807 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:02:27,807 INFO  L87              Difference]: Start difference. First operand 204998 states and 328910 transitions. Second operand 3 states.
[2020-07-20 15:02:46,714 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:02:46,714 INFO  L93              Difference]: Finished difference Result 610824 states and 980002 transitions.
[2020-07-20 15:02:46,715 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:02:46,715 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 480
[2020-07-20 15:02:46,715 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:02:47,183 INFO  L225             Difference]: With dead ends: 610824
[2020-07-20 15:02:47,183 INFO  L226             Difference]: Without dead ends: 407845
[2020-07-20 15:02:47,336 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:02:47,596 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 407845 states.
[2020-07-20 15:03:01,937 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 407845 to 206164.
[2020-07-20 15:03:01,937 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 206164 states.
[2020-07-20 15:03:02,229 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 206164 states to 206164 states and 330538 transitions.
[2020-07-20 15:03:02,229 INFO  L78                 Accepts]: Start accepts. Automaton has 206164 states and 330538 transitions. Word has length 480
[2020-07-20 15:03:02,229 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:03:02,229 INFO  L479      AbstractCegarLoop]: Abstraction has 206164 states and 330538 transitions.
[2020-07-20 15:03:02,229 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:03:02,229 INFO  L276                IsEmpty]: Start isEmpty. Operand 206164 states and 330538 transitions.
[2020-07-20 15:03:02,404 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 482
[2020-07-20 15:03:02,404 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:03:02,405 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]
[2020-07-20 15:03:02,605 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:03:02,606 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:03:02,606 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:03:02,607 INFO  L82        PathProgramCache]: Analyzing trace with hash 1442310410, now seen corresponding path program 1 times
[2020-07-20 15:03:02,607 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:03:02,608 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014663254]
[2020-07-20 15:03:02,608 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:03:03,120 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:03:03,120 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:03:03,128 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:03:03,133 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:03:03,766 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:03:03,766 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:03:03,766 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014663254]
[2020-07-20 15:03:03,766 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:03:03,767 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:03:03,767 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95573492]
[2020-07-20 15:03:03,768 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:03:03,768 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:03:03,768 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:03:03,768 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:03:03,768 INFO  L87              Difference]: Start difference. First operand 206164 states and 330538 transitions. Second operand 3 states.
[2020-07-20 15:03:24,782 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:03:24,782 INFO  L93              Difference]: Finished difference Result 612958 states and 982884 transitions.
[2020-07-20 15:03:24,782 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:03:24,783 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 481
[2020-07-20 15:03:24,783 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:03:25,279 INFO  L225             Difference]: With dead ends: 612958
[2020-07-20 15:03:25,279 INFO  L226             Difference]: Without dead ends: 409473
[2020-07-20 15:03:25,441 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:03:25,708 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 409473 states.
[2020-07-20 15:03:43,582 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 409473 to 207792.
[2020-07-20 15:03:43,582 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 207792 states.
[2020-07-20 15:03:43,842 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 207792 states to 207792 states and 332738 transitions.
[2020-07-20 15:03:43,843 INFO  L78                 Accepts]: Start accepts. Automaton has 207792 states and 332738 transitions. Word has length 481
[2020-07-20 15:03:43,843 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:03:43,843 INFO  L479      AbstractCegarLoop]: Abstraction has 207792 states and 332738 transitions.
[2020-07-20 15:03:43,843 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:03:43,843 INFO  L276                IsEmpty]: Start isEmpty. Operand 207792 states and 332738 transitions.
[2020-07-20 15:03:44,012 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 483
[2020-07-20 15:03:44,012 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:03:44,012 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]
[2020-07-20 15:03:44,213 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:03:44,213 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:03:44,213 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:03:44,214 INFO  L82        PathProgramCache]: Analyzing trace with hash -47946267, now seen corresponding path program 1 times
[2020-07-20 15:03:44,214 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:03:44,215 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48987855]
[2020-07-20 15:03:44,215 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:03:44,750 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:03:44,750 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:03:44,757 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:03:44,763 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:03:44,935 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:03:44,935 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:03:44,935 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [48987855]
[2020-07-20 15:03:44,936 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:03:44,936 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:03:44,936 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863376946]
[2020-07-20 15:03:44,937 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:03:44,937 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:03:44,937 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:03:44,937 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:03:44,937 INFO  L87              Difference]: Start difference. First operand 207792 states and 332738 transitions. Second operand 3 states.
[2020-07-20 15:04:08,069 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:04:08,070 INFO  L93              Difference]: Finished difference Result 596631 states and 953305 transitions.
[2020-07-20 15:04:08,070 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:04:08,070 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 482
[2020-07-20 15:04:08,071 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:04:08,561 INFO  L225             Difference]: With dead ends: 596631
[2020-07-20 15:04:08,561 INFO  L226             Difference]: Without dead ends: 406649
[2020-07-20 15:04:08,721 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:04:09,000 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 406649 states.
[2020-07-20 15:04:37,500 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 406649 to 406615.
[2020-07-20 15:04:37,500 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 406615 states.
[2020-07-20 15:04:38,088 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 406615 states to 406615 states and 648106 transitions.
[2020-07-20 15:04:38,089 INFO  L78                 Accepts]: Start accepts. Automaton has 406615 states and 648106 transitions. Word has length 482
[2020-07-20 15:04:38,089 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:04:38,089 INFO  L479      AbstractCegarLoop]: Abstraction has 406615 states and 648106 transitions.
[2020-07-20 15:04:38,089 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:04:38,089 INFO  L276                IsEmpty]: Start isEmpty. Operand 406615 states and 648106 transitions.
[2020-07-20 15:04:38,467 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 483
[2020-07-20 15:04:38,467 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:04:38,467 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]
[2020-07-20 15:04:38,668 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:04:38,668 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:04:38,668 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:04:38,669 INFO  L82        PathProgramCache]: Analyzing trace with hash -1093829118, now seen corresponding path program 1 times
[2020-07-20 15:04:38,669 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:04:38,670 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246115498]
[2020-07-20 15:04:38,670 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:04:39,134 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 15:04:39,134 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:04:39,138 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1447 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 15:04:39,145 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:04:39,267 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:04:39,268 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:04:39,268 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246115498]
[2020-07-20 15:04:39,268 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:04:39,268 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 15:04:39,268 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249097889]
[2020-07-20 15:04:39,269 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 15:04:39,269 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:04:39,269 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 15:04:39,270 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-20 15:04:39,270 INFO  L87              Difference]: Start difference. First operand 406615 states and 648106 transitions. Second operand 4 states.
[2020-07-20 15:05:23,394 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:05:23,394 INFO  L93              Difference]: Finished difference Result 1005566 states and 1607099 transitions.
[2020-07-20 15:05:23,395 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 15:05:23,395 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 482
[2020-07-20 15:05:23,395 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:05:24,122 INFO  L225             Difference]: With dead ends: 1005566
[2020-07-20 15:05:24,123 INFO  L226             Difference]: Without dead ends: 525070
[2020-07-20 15:05:24,390 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 479 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-20 15:05:24,966 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 525070 states.
[2020-07-20 15:06:01,731 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 525070 to 525036.
[2020-07-20 15:06:01,731 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 525036 states.
[2020-07-20 15:06:02,863 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 525036 states to 525036 states and 837936 transitions.
[2020-07-20 15:06:02,864 INFO  L78                 Accepts]: Start accepts. Automaton has 525036 states and 837936 transitions. Word has length 482
[2020-07-20 15:06:02,864 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:06:02,864 INFO  L479      AbstractCegarLoop]: Abstraction has 525036 states and 837936 transitions.
[2020-07-20 15:06:02,864 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 15:06:02,864 INFO  L276                IsEmpty]: Start isEmpty. Operand 525036 states and 837936 transitions.
[2020-07-20 15:06:03,420 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 484
[2020-07-20 15:06:03,420 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:06:03,421 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]
[2020-07-20 15:06:03,621 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:06:03,622 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:06:03,622 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:06:03,623 INFO  L82        PathProgramCache]: Analyzing trace with hash 1469360888, now seen corresponding path program 1 times
[2020-07-20 15:06:03,623 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:06:03,623 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525543616]
[2020-07-20 15:06:03,624 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:06:04,120 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 15:06:04,120 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:06:04,126 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1657 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:06:04,131 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:06:04,478 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:06:04,478 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:06:04,479 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525543616]
[2020-07-20 15:06:04,479 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:06:04,479 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:06:04,480 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105757573]
[2020-07-20 15:06:04,482 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:06:04,482 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:06:04,483 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:06:04,483 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:06:04,483 INFO  L87              Difference]: Start difference. First operand 525036 states and 837936 transitions. Second operand 3 states.
[2020-07-20 15:07:13,893 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:07:13,893 INFO  L93              Difference]: Finished difference Result 1534425 states and 2448538 transitions.
[2020-07-20 15:07:13,894 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:07:13,894 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 483
[2020-07-20 15:07:13,894 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:07:15,331 INFO  L225             Difference]: With dead ends: 1534425
[2020-07-20 15:07:15,331 INFO  L226             Difference]: Without dead ends: 1031442
[2020-07-20 15:07:15,712 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:07:16,447 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1031442 states.
[2020-07-20 15:08:37,104 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031442 to 1031422.
[2020-07-20 15:08:37,104 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1031422 states.
[2020-07-20 15:08:38,923 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1031422 states to 1031422 states and 1639697 transitions.
[2020-07-20 15:08:38,924 INFO  L78                 Accepts]: Start accepts. Automaton has 1031422 states and 1639697 transitions. Word has length 483
[2020-07-20 15:08:38,924 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 15:08:38,924 INFO  L479      AbstractCegarLoop]: Abstraction has 1031422 states and 1639697 transitions.
[2020-07-20 15:08:38,924 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 15:08:38,924 INFO  L276                IsEmpty]: Start isEmpty. Operand 1031422 states and 1639697 transitions.
[2020-07-20 15:08:42,055 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 486
[2020-07-20 15:08:42,055 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 15:08:42,056 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]
[2020-07-20 15:08:42,256 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:08:42,257 INFO  L427      AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 15:08:42,257 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 15:08:42,258 INFO  L82        PathProgramCache]: Analyzing trace with hash 1655658926, now seen corresponding path program 1 times
[2020-07-20 15:08:42,258 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 15:08:42,258 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905163498]
[2020-07-20 15:08:42,259 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 15:08:42,677 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 15:08:42,677 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 15:08:42,681 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 15:08:42,685 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 15:08:42,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 15:08:42,829 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 15:08:42,830 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905163498]
[2020-07-20 15:08:42,830 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 15:08:42,830 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 15:08:42,830 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235080870]
[2020-07-20 15:08:42,831 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 15:08:42,831 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 15:08:42,831 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 15:08:42,831 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:08:42,832 INFO  L87              Difference]: Start difference. First operand 1031422 states and 1639697 transitions. Second operand 3 states.
[2020-07-20 15:11:03,262 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 15:11:03,262 INFO  L93              Difference]: Finished difference Result 2860792 states and 4517767 transitions.
[2020-07-20 15:11:03,263 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 15:11:03,263 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 485
[2020-07-20 15:11:03,263 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 15:11:07,172 INFO  L225             Difference]: With dead ends: 2860792
[2020-07-20 15:11:07,172 INFO  L226             Difference]: Without dead ends: 1951791
[2020-07-20 15:11:07,945 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 15:11:09,239 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1951791 states.