/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 DAGSIZE --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/loops/array-1.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 22:14:49,258 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 22:14:49,260 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 22:14:49,274 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 22:14:49,274 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 22:14:49,275 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 22:14:49,277 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 22:14:49,279 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 22:14:49,281 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 22:14:49,282 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 22:14:49,283 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 22:14:49,284 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 22:14:49,284 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 22:14:49,285 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 22:14:49,286 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 22:14:49,290 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 22:14:49,291 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 22:14:49,292 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 22:14:49,296 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 22:14:49,298 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 22:14:49,300 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 22:14:49,301 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 22:14:49,302 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 22:14:49,303 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 22:14:49,305 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 22:14:49,306 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 22:14:49,306 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 22:14:49,307 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 22:14:49,307 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 22:14:49,308 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 22:14:49,309 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 22:14:49,309 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 22:14:49,310 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 22:14:49,311 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 22:14:49,312 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 22:14:49,312 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 22:14:49,313 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-07-20 22:14:49,313 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 22:14:49,315 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 22:14:49,316 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 22:14:49,331 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 22:14:49,331 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 22:14:49,333 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 22:14:49,333 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 22:14:49,333 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 22:14:49,333 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 22:14:49,334 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 22:14:49,334 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 22:14:49,334 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 22:14:49,334 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 22:14:49,334 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 22:14:49,334 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 22:14:49,335 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 22:14:49,335 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 22:14:49,335 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 22:14:49,335 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 22:14:49,335 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 22:14:49,336 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 22:14:49,336 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 22:14:49,336 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 22:14:49,336 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 22:14:49,336 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 22:14:49,337 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 22:14:49,337 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 22:14:49,337 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 22:14:49,337 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 22:14:49,337 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:14:49,338 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 22:14:49,338 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 22:14:49,338 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 -> DAGSIZE
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 22:14:49,652 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 22:14:49,665 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 22:14:49,669 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 22:14:49,670 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 22:14:49,671 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 22:14:49,671 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-1.c
[2020-07-20 22:14:49,752 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56141ffbe/5bf049d0525e4f94a03f09aee7d34ea1/FLAG75d1531fc
[2020-07-20 22:14:50,261 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 22:14:50,262 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-1.c
[2020-07-20 22:14:50,271 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56141ffbe/5bf049d0525e4f94a03f09aee7d34ea1/FLAG75d1531fc
[2020-07-20 22:14:50,611 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56141ffbe/5bf049d0525e4f94a03f09aee7d34ea1
[2020-07-20 22:14:50,621 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 22:14:50,624 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 22:14:50,625 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 22:14:50,625 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 22:14:50,629 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 22:14:50,630 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:14:50" (1/1) ...
[2020-07-20 22:14:50,633 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a71685b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50, skipping insertion in model container
[2020-07-20 22:14:50,634 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:14:50" (1/1) ...
[2020-07-20 22:14:50,642 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 22:14:50,659 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 22:14:50,835 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 22:14:50,840 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 22:14:50,863 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 22:14:50,888 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 22:14:50,889 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50 WrapperNode
[2020-07-20 22:14:50,889 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 22:14:50,890 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 22:14:50,890 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 22:14:50,890 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 22:14:50,991 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50" (1/1) ...
[2020-07-20 22:14:50,991 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50" (1/1) ...
[2020-07-20 22:14:50,999 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50" (1/1) ...
[2020-07-20 22:14:51,000 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50" (1/1) ...
[2020-07-20 22:14:51,006 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50" (1/1) ...
[2020-07-20 22:14:51,011 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50" (1/1) ...
[2020-07-20 22:14:51,013 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50" (1/1) ...
[2020-07-20 22:14:51,015 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 22:14:51,016 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 22:14:51,016 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 22:14:51,016 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 22:14:51,017 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 22:14:51,089 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 22:14:51,089 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 22:14:51,089 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 22:14:51,089 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 22:14:51,090 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 22:14:51,090 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 22:14:51,090 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 22:14:51,090 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 22:14:51,090 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 22:14:51,091 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 22:14:51,091 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 22:14:51,091 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 22:14:51,091 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 22:14:51,091 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 22:14:51,373 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 22:14:51,374 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 22:14:51,387 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:14:51 BoogieIcfgContainer
[2020-07-20 22:14:51,388 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 22:14:51,389 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 22:14:51,389 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 22:14:51,396 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 22:14:51,396 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:14:50" (1/3) ...
[2020-07-20 22:14:51,397 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231688bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:14:51, skipping insertion in model container
[2020-07-20 22:14:51,397 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:14:50" (2/3) ...
[2020-07-20 22:14:51,398 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@231688bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:14:51, skipping insertion in model container
[2020-07-20 22:14:51,398 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:14:51" (3/3) ...
[2020-07-20 22:14:51,404 INFO  L109   eAbstractionObserver]: Analyzing ICFG array-1.c
[2020-07-20 22:14:51,429 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 22:14:51,437 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 22:14:51,452 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 22:14:51,478 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 22:14:51,478 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 22:14:51,478 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 22:14:51,478 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 22:14:51,479 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 22:14:51,479 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 22:14:51,479 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 22:14:51,479 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 22:14:51,498 INFO  L276                IsEmpty]: Start isEmpty. Operand 22 states.
[2020-07-20 22:14:51,502 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-07-20 22:14:51,503 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 22:14:51,504 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 22:14:51,504 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 22:14:51,509 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 22:14:51,509 INFO  L82        PathProgramCache]: Analyzing trace with hash 202253298, now seen corresponding path program 1 times
[2020-07-20 22:14:51,517 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 22:14:51,517 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660615533]
[2020-07-20 22:14:51,518 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 22:14:51,615 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 22:14:51,616 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 22:14:51,619 INFO  L263         TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 22:14:51,624 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 22:14:51,643 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 22:14:51,644 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 22:14:51,645 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660615533]
[2020-07-20 22:14:51,646 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 22:14:51,646 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 22:14:51,647 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700247685]
[2020-07-20 22:14:51,653 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 22:14:51,653 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 22:14:51,665 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 22:14:51,666 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 22:14:51,668 INFO  L87              Difference]: Start difference. First operand 22 states. Second operand 2 states.
[2020-07-20 22:14:51,693 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 22:14:51,694 INFO  L93              Difference]: Finished difference Result 35 states and 39 transitions.
[2020-07-20 22:14:51,694 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-20 22:14:51,695 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 12
[2020-07-20 22:14:51,695 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 22:14:51,702 INFO  L225             Difference]: With dead ends: 35
[2020-07-20 22:14:51,702 INFO  L226             Difference]: Without dead ends: 15
[2020-07-20 22:14:51,706 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 22:14:51,724 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2020-07-20 22:14:51,746 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2020-07-20 22:14:51,748 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2020-07-20 22:14:51,749 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions.
[2020-07-20 22:14:51,751 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12
[2020-07-20 22:14:51,752 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 22:14:51,752 INFO  L479      AbstractCegarLoop]: Abstraction has 15 states and 16 transitions.
[2020-07-20 22:14:51,752 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 22:14:51,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions.
[2020-07-20 22:14:51,754 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-07-20 22:14:51,755 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 22:14:51,755 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 22:14:51,972 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:14:51,972 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 22:14:51,972 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 22:14:51,973 INFO  L82        PathProgramCache]: Analyzing trace with hash -112667363, now seen corresponding path program 1 times
[2020-07-20 22:14:51,973 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 22:14:51,973 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674708840]
[2020-07-20 22:14:51,974 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 22:14:52,015 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 22:14:52,015 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 22:14:52,016 INFO  L263         TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-20 22:14:52,018 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 22:14:52,057 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 22:14:52,057 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 22:14:52,059 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674708840]
[2020-07-20 22:14:52,059 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 22:14:52,060 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 22:14:52,060 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724093760]
[2020-07-20 22:14:52,061 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 22:14:52,062 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 22:14:52,062 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 22:14:52,063 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 22:14:52,063 INFO  L87              Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states.
[2020-07-20 22:14:52,102 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 22:14:52,103 INFO  L93              Difference]: Finished difference Result 24 states and 26 transitions.
[2020-07-20 22:14:52,103 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 22:14:52,104 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 12
[2020-07-20 22:14:52,104 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 22:14:52,105 INFO  L225             Difference]: With dead ends: 24
[2020-07-20 22:14:52,105 INFO  L226             Difference]: Without dead ends: 18
[2020-07-20 22:14:52,107 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 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 22:14:52,108 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2020-07-20 22:14:52,113 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16.
[2020-07-20 22:14:52,113 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2020-07-20 22:14:52,114 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions.
[2020-07-20 22:14:52,115 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12
[2020-07-20 22:14:52,115 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 22:14:52,115 INFO  L479      AbstractCegarLoop]: Abstraction has 16 states and 17 transitions.
[2020-07-20 22:14:52,115 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 22:14:52,116 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions.
[2020-07-20 22:14:52,116 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-20 22:14:52,116 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 22:14:52,117 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 22:14:52,330 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:14:52,332 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 22:14:52,332 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 22:14:52,333 INFO  L82        PathProgramCache]: Analyzing trace with hash -1912057964, now seen corresponding path program 1 times
[2020-07-20 22:14:52,333 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 22:14:52,335 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [764165198]
[2020-07-20 22:14:52,336 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 22:14:52,402 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 22:14:52,402 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 22:14:52,403 INFO  L263         TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 22:14:52,406 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 22:14:52,461 WARN  L234             Elim1Store]: Array PQE input equivalent to false
[2020-07-20 22:14:52,461 INFO  L544         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,482 INFO  L624         ElimStorePlain]: treesize reduction 5, result has 80.8 percent of original size
[2020-07-20 22:14:52,510 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13
[2020-07-20 22:14:52,514 INFO  L544         ElimStorePlain]: Start of recursive call 3:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,523 INFO  L624         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 22:14:52,524 INFO  L544         ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,525 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:55, output treesize:3
[2020-07-20 22:14:52,547 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-07-20 22:14:52,550 INFO  L544         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,552 INFO  L624         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 22:14:52,553 INFO  L544         ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,553 INFO  L244         ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-07-20 22:14:52,564 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 22:14:52,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 22:14:52,586 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 22:14:52,609 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,621 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,666 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,668 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,673 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,676 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,704 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36
[2020-07-20 22:14:52,709 INFO  L173   IndexEqualityManager]: detected equality via solver
[2020-07-20 22:14:52,712 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2020-07-20 22:14:52,719 INFO  L173   IndexEqualityManager]: detected equality via solver
[2020-07-20 22:14:52,722 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2020-07-20 22:14:52,728 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2020-07-20 22:14:52,729 INFO  L544         ElimStorePlain]: Start of recursive call 3:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,732 INFO  L624         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 22:14:52,732 INFO  L544         ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,740 WARN  L234             Elim1Store]: Array PQE input equivalent to true
[2020-07-20 22:14:52,741 INFO  L544         ElimStorePlain]: Start of recursive call 4:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,747 WARN  L234             Elim1Store]: Array PQE input equivalent to true
[2020-07-20 22:14:52,748 INFO  L544         ElimStorePlain]: Start of recursive call 5:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,789 INFO  L624         ElimStorePlain]: treesize reduction 150, result has 22.3 percent of original size
[2020-07-20 22:14:52,794 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33
[2020-07-20 22:14:52,812 INFO  L350             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 22:14:52,825 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 118
[2020-07-20 22:14:52,830 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,833 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,834 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,837 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,839 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,840 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,841 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:52,844 INFO  L544         ElimStorePlain]: Start of recursive call 7:  End of recursive call:  and 3 xjuncts.
[2020-07-20 22:14:52,866 INFO  L624         ElimStorePlain]: treesize reduction 105, result has 7.9 percent of original size
[2020-07-20 22:14:52,866 INFO  L544         ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:52,874 INFO  L624         ElimStorePlain]: treesize reduction 6, result has 60.0 percent of original size
[2020-07-20 22:14:52,875 INFO  L544         ElimStorePlain]: Start of recursive call 1: 6 dim-0 vars, 2 dim-2 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-07-20 22:14:52,876 INFO  L244         ElimStorePlain]: Needed 7 recursive calls to eliminate 8 variables, input treesize:367, output treesize:9
[2020-07-20 22:14:52,900 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 22:14:52,901 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [764165198]
[2020-07-20 22:14:52,901 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 22:14:52,901 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9
[2020-07-20 22:14:52,901 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137563057]
[2020-07-20 22:14:52,902 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-07-20 22:14:52,902 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 22:14:52,903 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-07-20 22:14:52,903 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2020-07-20 22:14:52,903 INFO  L87              Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 9 states.
[2020-07-20 22:14:53,006 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 22:14:53,006 INFO  L93              Difference]: Finished difference Result 26 states and 28 transitions.
[2020-07-20 22:14:53,009 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 22:14:53,009 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 15
[2020-07-20 22:14:53,010 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 22:14:53,010 INFO  L225             Difference]: With dead ends: 26
[2020-07-20 22:14:53,010 INFO  L226             Difference]: Without dead ends: 20
[2020-07-20 22:14:53,011 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132
[2020-07-20 22:14:53,012 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20 states.
[2020-07-20 22:14:53,015 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19.
[2020-07-20 22:14:53,016 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2020-07-20 22:14:53,016 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions.
[2020-07-20 22:14:53,017 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15
[2020-07-20 22:14:53,017 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 22:14:53,017 INFO  L479      AbstractCegarLoop]: Abstraction has 19 states and 21 transitions.
[2020-07-20 22:14:53,017 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-07-20 22:14:53,017 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions.
[2020-07-20 22:14:53,018 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-20 22:14:53,018 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 22:14:53,018 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 22:14:53,230 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:14:53,231 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 22:14:53,232 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 22:14:53,232 INFO  L82        PathProgramCache]: Analyzing trace with hash 1573562706, now seen corresponding path program 1 times
[2020-07-20 22:14:53,233 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 22:14:53,233 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223258485]
[2020-07-20 22:14:53,234 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 22:14:53,284 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 22:14:53,284 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 22:14:53,286 INFO  L263         TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 22:14:53,289 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 22:14:53,314 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 22:14:53,319 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts
[2020-07-20 22:14:53,328 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts
[2020-07-20 22:14:53,352 WARN  L234             Elim1Store]: Array PQE input equivalent to false
[2020-07-20 22:14:53,353 INFO  L544         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:53,361 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13
[2020-07-20 22:14:53,362 INFO  L544         ElimStorePlain]: Start of recursive call 3:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:53,409 INFO  L624         ElimStorePlain]: treesize reduction 109, result has 22.7 percent of original size
[2020-07-20 22:14:53,410 INFO  L512         ElimStorePlain]: Eliminatee v_prenex_7 vanished before elimination
[2020-07-20 22:14:53,411 INFO  L544         ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-07-20 22:14:53,412 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:193, output treesize:19
[2020-07-20 22:14:53,476 INFO  L350             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 22:14:53,477 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23
[2020-07-20 22:14:53,479 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 22:14:53,481 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 22:14:53,483 INFO  L544         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 2 xjuncts.
[2020-07-20 22:14:53,498 INFO  L624         ElimStorePlain]: treesize reduction 11, result has 50.0 percent of original size
[2020-07-20 22:14:53,502 INFO  L544         ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:53,503 INFO  L244         ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:28, output treesize:5
[2020-07-20 22:14:53,520 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 22:14:53,554 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 22:14:53,554 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 22:14:53,587 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,651 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,654 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,655 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,658 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,675 WARN  L234             Elim1Store]: Array PQE input equivalent to true
[2020-07-20 22:14:53,675 INFO  L544         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:53,682 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36
[2020-07-20 22:14:53,689 INFO  L173   IndexEqualityManager]: detected equality via solver
[2020-07-20 22:14:53,693 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2020-07-20 22:14:53,697 INFO  L173   IndexEqualityManager]: detected equality via solver
[2020-07-20 22:14:53,699 INFO  L190   IndexEqualityManager]: detected not equals via solver
[2020-07-20 22:14:53,703 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5
[2020-07-20 22:14:53,704 INFO  L544         ElimStorePlain]: Start of recursive call 4:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:53,707 INFO  L624         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 22:14:53,708 INFO  L544         ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:53,712 WARN  L234             Elim1Store]: Array PQE input equivalent to true
[2020-07-20 22:14:53,712 INFO  L544         ElimStorePlain]: Start of recursive call 5:  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:53,717 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33
[2020-07-20 22:14:53,732 INFO  L350             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-20 22:14:53,733 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 118
[2020-07-20 22:14:53,734 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,735 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 22:14:53,736 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,737 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,738 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 22:14:53,739 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,741 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 22:14:53,743 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,745 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,746 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,747 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:14:53,750 INFO  L544         ElimStorePlain]: Start of recursive call 7:  End of recursive call:  and 2 xjuncts.
[2020-07-20 22:14:53,768 INFO  L624         ElimStorePlain]: treesize reduction 279, result has 3.1 percent of original size
[2020-07-20 22:14:53,769 INFO  L544         ElimStorePlain]: Start of recursive call 6: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-20 22:14:53,809 INFO  L624         ElimStorePlain]: treesize reduction 32, result has 36.0 percent of original size
[2020-07-20 22:14:53,810 INFO  L544         ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars,  End of recursive call: 2 dim-0 vars,  and 1 xjuncts.
[2020-07-20 22:14:53,811 INFO  L244         ElimStorePlain]: Needed 7 recursive calls to eliminate 5 variables, input treesize:235, output treesize:18
[2020-07-20 22:14:53,851 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 22:14:53,851 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223258485]
[2020-07-20 22:14:53,852 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 22:14:53,852 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12
[2020-07-20 22:14:53,852 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116203511]
[2020-07-20 22:14:53,853 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 22:14:53,853 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 22:14:53,853 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 22:14:53,854 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132
[2020-07-20 22:14:53,854 INFO  L87              Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 12 states.
[2020-07-20 22:14:54,009 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 22:14:54,010 INFO  L93              Difference]: Finished difference Result 27 states and 29 transitions.
[2020-07-20 22:14:54,010 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 22:14:54,011 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 15
[2020-07-20 22:14:54,011 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 22:14:54,012 INFO  L225             Difference]: With dead ends: 27
[2020-07-20 22:14:54,012 INFO  L226             Difference]: Without dead ends: 21
[2020-07-20 22:14:54,013 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240
[2020-07-20 22:14:54,014 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2020-07-20 22:14:54,017 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19.
[2020-07-20 22:14:54,018 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2020-07-20 22:14:54,019 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions.
[2020-07-20 22:14:54,019 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15
[2020-07-20 22:14:54,020 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 22:14:54,020 INFO  L479      AbstractCegarLoop]: Abstraction has 19 states and 21 transitions.
[2020-07-20 22:14:54,020 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 22:14:54,020 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions.
[2020-07-20 22:14:54,021 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-20 22:14:54,021 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 22:14:54,021 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 22:14:54,236 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:14:54,237 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 22:14:54,238 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 22:14:54,239 INFO  L82        PathProgramCache]: Analyzing trace with hash -2070630979, now seen corresponding path program 2 times
[2020-07-20 22:14:54,239 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 22:14:54,240 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590904352]
[2020-07-20 22:14:54,240 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 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 22:14:54,298 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 22:14:54,299 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 22:14:54,300 INFO  L263         TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 22:14:54,302 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 22:14:54,326 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 22:14:54,326 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 22:14:54,355 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 22:14:54,356 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590904352]
[2020-07-20 22:14:54,356 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 22:14:54,357 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6
[2020-07-20 22:14:54,357 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849290566]
[2020-07-20 22:14:54,357 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 22:14:54,358 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 22:14:54,358 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 22:14:54,358 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-07-20 22:14:54,358 INFO  L87              Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 6 states.
[2020-07-20 22:14:54,373 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 22:14:54,373 INFO  L93              Difference]: Finished difference Result 21 states and 23 transitions.
[2020-07-20 22:14:54,374 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 22:14:54,374 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 18
[2020-07-20 22:14:54,375 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 22:14:54,375 INFO  L225             Difference]: With dead ends: 21
[2020-07-20 22:14:54,375 INFO  L226             Difference]: Without dead ends: 0
[2020-07-20 22:14:54,376 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30
[2020-07-20 22:14:54,376 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 22:14:54,377 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 22:14:54,377 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 22:14:54,377 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 22:14:54,377 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18
[2020-07-20 22:14:54,377 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 22:14:54,378 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 22:14:54,378 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 22:14:54,378 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 22:14:54,378 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 22:14:54,587 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:14:54,591 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 22:14:54,751 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initFINAL(line -1)  no Hoare annotation was computed.
[2020-07-20 22:14:54,752 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initENTRY(line -1)  the Hoare annotation is:  true
[2020-07-20 22:14:54,752 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 22:14:54,752 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 22:14:54,752 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-07-20 22:14:54,752 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-07-20 22:14:54,752 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-07-20 22:14:54,752 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 11 29)  the Hoare annotation is:  true
[2020-07-20 22:14:54,753 INFO  L264        CegarLoopResult]: At program point  L26(line 26)  the Hoare annotation is:  (and (<= main_~menor~0 (select (select |#memory_int| |main_~#array~0.base|) |main_~#array~0.offset|)) (<= main_~menor~0 |main_#t~mem5|))
[2020-07-20 22:14:54,753 INFO  L268        CegarLoopResult]: For program point  L26-1(line 26)  no Hoare annotation was computed.
[2020-07-20 22:14:54,753 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 11 29)  no Hoare annotation was computed.
[2020-07-20 22:14:54,754 INFO  L268        CegarLoopResult]: For program point  L22(lines 22 23)  no Hoare annotation was computed.
[2020-07-20 22:14:54,755 INFO  L268        CegarLoopResult]: For program point  L19-2(lines 19 24)  no Hoare annotation was computed.
[2020-07-20 22:14:54,755 INFO  L264        CegarLoopResult]: At program point  L19-3(lines 19 24)  the Hoare annotation is:  (let ((.cse0 (= 1 main_~SIZE~0))) (or (and (<= main_~menor~0 (select (select |#memory_int| |main_~#array~0.base|) |main_~#array~0.offset|)) .cse0 (= 1 main_~j~0)) (and .cse0 (= 0 main_~j~0))))
[2020-07-20 22:14:54,755 INFO  L268        CegarLoopResult]: For program point  L19-4(lines 19 24)  no Hoare annotation was computed.
[2020-07-20 22:14:54,755 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 11 29)  no Hoare annotation was computed.
[2020-07-20 22:14:54,755 INFO  L271        CegarLoopResult]: At program point  __VERIFIER_assertENTRY(lines 3 8)  the Hoare annotation is:  true
[2020-07-20 22:14:54,756 INFO  L268        CegarLoopResult]: For program point  __VERIFIER_assertEXIT(lines 3 8)  no Hoare annotation was computed.
[2020-07-20 22:14:54,756 INFO  L268        CegarLoopResult]: For program point  L5(line 5)  no Hoare annotation was computed.
[2020-07-20 22:14:54,756 INFO  L268        CegarLoopResult]: For program point  L4(lines 4 6)  no Hoare annotation was computed.
[2020-07-20 22:14:54,756 INFO  L268        CegarLoopResult]: For program point  __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5)  no Hoare annotation was computed.
[2020-07-20 22:14:54,760 INFO  L268        CegarLoopResult]: For program point  L4-2(lines 3 8)  no Hoare annotation was computed.
[2020-07-20 22:14:54,772 WARN  L1295  BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 22:14:54,780 WARN  L1295  BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 22:14:54,784 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:14:54 BoogieIcfgContainer
[2020-07-20 22:14:54,784 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 22:14:54,789 INFO  L168              Benchmark]: Toolchain (without parser) took 4163.96 ms. Allocated memory was 144.2 MB in the beginning and 249.0 MB in the end (delta: 104.9 MB). Free memory was 102.0 MB in the beginning and 216.1 MB in the end (delta: -114.1 MB). Peak memory consumption was 111.4 MB. Max. memory is 7.1 GB.
[2020-07-20 22:14:54,795 INFO  L168              Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 22:14:54,796 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 264.31 ms. Allocated memory is still 144.2 MB. Free memory was 101.8 MB in the beginning and 91.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
[2020-07-20 22:14:54,798 INFO  L168              Benchmark]: Boogie Preprocessor took 125.19 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.6 MB in the beginning and 179.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
[2020-07-20 22:14:54,802 INFO  L168              Benchmark]: RCFGBuilder took 372.30 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 164.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB.
[2020-07-20 22:14:54,804 INFO  L168              Benchmark]: TraceAbstraction took 3395.45 ms. Allocated memory was 201.3 MB in the beginning and 249.0 MB in the end (delta: 47.7 MB). Free memory was 163.7 MB in the beginning and 216.1 MB in the end (delta: -52.4 MB). Peak memory consumption was 116.0 MB. Max. memory is 7.1 GB.
[2020-07-20 22:14:54,813 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.21 ms. Allocated memory is still 144.2 MB. Free memory was 120.4 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 264.31 ms. Allocated memory is still 144.2 MB. Free memory was 101.8 MB in the beginning and 91.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 125.19 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.6 MB in the beginning and 179.3 MB in the end (delta: -87.7 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 372.30 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 164.4 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 3395.45 ms. Allocated memory was 201.3 MB in the beginning and 249.0 MB in the end (delta: 47.7 MB). Free memory was 163.7 MB in the beginning and 216.1 MB in the end (delta: -52.4 MB). Peak memory consumption was 116.0 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator:
  - GenericResult: Unfinished Backtranslation
    unknown boogie variable #memory_int
  - GenericResult: Unfinished Backtranslation
    unknown boogie variable #memory_int
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable
    For all program executions holds that call of __VERIFIER_error() unreachable at this location
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - InvariantResult [Line: 19]: Loop Invariant
[2020-07-20 22:14:54,827 WARN  L1295  BoogieBacktranslator]: unknown boogie variable #memory_int
[2020-07-20 22:14:54,828 WARN  L1295  BoogieBacktranslator]: unknown boogie variable #memory_int
    Derived loop invariant: ((menor <= unknown-#memory_int-unknown[array][array] && 1 == SIZE) && 1 == j) || (1 == SIZE && 0 == j)
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.1s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 65 SDtfs, 24 SDslu, 145 SDs, 0 SdLazy, 118 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 15 NumberOfFragments, 38 HoareAnnotationTreeSize, 11 FomulaSimplifications, 3 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 60 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 72 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 112 ConstructedInterpolants, 5 QuantifiedInterpolants, 6144 SizeOfPredicates, 27 NumberOfNonLiveVariables, 246 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 8/14 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...