/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 BIGGEST_EQUIVALENCE_CLASS --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/locks/test_locks_7.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-21 01:05:47,196 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-21 01:05:47,200 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-21 01:05:47,228 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-21 01:05:47,229 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-21 01:05:47,231 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-21 01:05:47,233 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-21 01:05:47,237 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-21 01:05:47,240 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-21 01:05:47,241 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-07-21 01:05:47,245 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-21 01:05:47,246 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-21 01:05:47,248 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-21 01:05:47,250 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-21 01:05:47,252 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-21 01:05:47,254 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-21 01:05:47,255 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-21 01:05:47,257 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-21 01:05:47,260 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-21 01:05:47,263 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-21 01:05:47,265 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-21 01:05:47,267 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-21 01:05:47,268 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-21 01:05:47,273 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-21 01:05:47,274 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-21 01:05:47,274 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-21 01:05:47,275 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-21 01:05:47,276 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-21 01:05:47,278 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-21 01:05:47,278 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-21 01:05:47,280 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
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[2020-07-21 01:05:47,283 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-21 01:05:47,284 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-21 01:05:47,285 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-21 01:05:47,288 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-21 01:05:47,290 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
[2020-07-21 01:05:47,310 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-21 01:05:47,311 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-21 01:05:47,312 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-21 01:05:47,313 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-21 01:05:47,313 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-21 01:05:47,313 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-21 01:05:47,314 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-21 01:05:47,314 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-21 01:05:47,314 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-21 01:05:47,314 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-21 01:05:47,315 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-21 01:05:47,315 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-21 01:05:47,315 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-21 01:05:47,315 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-21 01:05:47,316 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-21 01:05:47,316 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-21 01:05:47,316 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-21 01:05:47,316 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-21 01:05:47,317 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-21 01:05:47,317 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-21 01:05:47,317 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-21 01:05:47,317 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 01:05:47,318 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-21 01:05:47,318 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-21 01:05:47,318 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-21 01:05:47,318 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-21 01:05:47,319 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:47,319 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-21 01:05:47,319 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-21 01:05:47,319 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 -> BIGGEST_EQUIVALENCE_CLASS
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
[2020-07-21 01:05:47,721 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-21 01:05:47,757 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-21 01:05:47,767 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-21 01:05:47,770 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-21 01:05:47,774 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-21 01:05:47,776 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c
[2020-07-21 01:05:47,900 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835240808/3f21cb3c983645a0a1f72ad3c44adb6c/FLAGcef8882bd
[2020-07-21 01:05:48,689 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-21 01:05:48,691 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c
[2020-07-21 01:05:48,704 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835240808/3f21cb3c983645a0a1f72ad3c44adb6c/FLAGcef8882bd
[2020-07-21 01:05:49,006 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/835240808/3f21cb3c983645a0a1f72ad3c44adb6c
[2020-07-21 01:05:49,022 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-21 01:05:49,027 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-21 01:05:49,028 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-21 01:05:49,029 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-21 01:05:49,035 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-21 01:05:49,036 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:05:49" (1/1) ...
[2020-07-21 01:05:49,042 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77ac54e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49, skipping insertion in model container
[2020-07-21 01:05:49,042 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:05:49" (1/1) ...
[2020-07-21 01:05:49,054 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-21 01:05:49,085 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-21 01:05:49,517 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:05:49,531 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-21 01:05:49,609 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:05:49,664 INFO  L208         MainTranslator]: Completed translation
[2020-07-21 01:05:49,665 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49 WrapperNode
[2020-07-21 01:05:49,665 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-21 01:05:49,666 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-21 01:05:49,667 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-21 01:05:49,667 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-21 01:05:49,829 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49" (1/1) ...
[2020-07-21 01:05:49,834 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49" (1/1) ...
[2020-07-21 01:05:49,856 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49" (1/1) ...
[2020-07-21 01:05:49,857 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49" (1/1) ...
[2020-07-21 01:05:49,878 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49" (1/1) ...
[2020-07-21 01:05:49,897 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49" (1/1) ...
[2020-07-21 01:05:49,902 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49" (1/1) ...
[2020-07-21 01:05:49,911 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-21 01:05:49,913 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-21 01:05:49,914 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-21 01:05:49,914 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-21 01:05:49,916 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49" (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
[2020-07-21 01:05:49,993 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-21 01:05:49,993 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-21 01:05:49,993 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-21 01:05:49,994 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-21 01:05:49,994 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-21 01:05:49,995 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-21 01:05:49,995 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-21 01:05:49,995 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-21 01:05:50,453 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-21 01:05:50,454 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-21 01:05:50,460 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:05:50 BoogieIcfgContainer
[2020-07-21 01:05:50,460 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-21 01:05:50,462 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-21 01:05:50,463 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-21 01:05:50,467 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-21 01:05:50,468 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:05:49" (1/3) ...
[2020-07-21 01:05:50,469 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488c867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:05:50, skipping insertion in model container
[2020-07-21 01:05:50,469 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:05:49" (2/3) ...
[2020-07-21 01:05:50,470 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488c867 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:05:50, skipping insertion in model container
[2020-07-21 01:05:50,470 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:05:50" (3/3) ...
[2020-07-21 01:05:50,472 INFO  L109   eAbstractionObserver]: Analyzing ICFG test_locks_7.c
[2020-07-21 01:05:50,483 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-21 01:05:50,491 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-21 01:05:50,509 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-21 01:05:50,547 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-21 01:05:50,547 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-21 01:05:50,548 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-21 01:05:50,548 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-21 01:05:50,548 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-21 01:05:50,550 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-21 01:05:50,550 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-21 01:05:50,550 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-21 01:05:50,583 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states.
[2020-07-21 01:05:50,592 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-07-21 01:05:50,593 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:50,594 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:05:50,595 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:50,604 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:50,605 INFO  L82        PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times
[2020-07-21 01:05:50,615 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:50,615 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927340780]
[2020-07-21 01:05:50,615 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
[2020-07-21 01:05:50,744 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:50,745 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:50,749 INFO  L263         TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:50,758 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:50,817 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:50,818 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:50,820 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927340780]
[2020-07-21 01:05:50,822 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:50,822 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:50,825 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22717654]
[2020-07-21 01:05:50,834 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:50,836 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:50,857 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:50,859 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:50,862 INFO  L87              Difference]: Start difference. First operand 35 states. Second operand 3 states.
[2020-07-21 01:05:50,950 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:50,951 INFO  L93              Difference]: Finished difference Result 69 states and 114 transitions.
[2020-07-21 01:05:50,952 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:50,955 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 17
[2020-07-21 01:05:50,956 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:50,975 INFO  L225             Difference]: With dead ends: 69
[2020-07-21 01:05:50,975 INFO  L226             Difference]: Without dead ends: 54
[2020-07-21 01:05:50,981 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:51,005 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2020-07-21 01:05:51,032 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38.
[2020-07-21 01:05:51,034 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-07-21 01:05:51,037 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions.
[2020-07-21 01:05:51,039 INFO  L78                 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17
[2020-07-21 01:05:51,039 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:51,039 INFO  L479      AbstractCegarLoop]: Abstraction has 38 states and 65 transitions.
[2020-07-21 01:05:51,040 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:51,040 INFO  L276                IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions.
[2020-07-21 01:05:51,041 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-07-21 01:05:51,041 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:51,042 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:05:51,249 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:51,249 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:51,250 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:51,250 INFO  L82        PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times
[2020-07-21 01:05:51,250 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:51,251 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854210657]
[2020-07-21 01:05:51,251 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
[2020-07-21 01:05:51,320 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 01:05:51,320 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:51,323 INFO  L263         TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:51,327 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:51,346 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:51,347 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:51,348 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854210657]
[2020-07-21 01:05:51,348 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:51,348 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:51,349 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374025023]
[2020-07-21 01:05:51,352 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:51,352 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:51,353 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:51,353 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:51,353 INFO  L87              Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states.
[2020-07-21 01:05:51,398 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:51,399 INFO  L93              Difference]: Finished difference Result 87 states and 152 transitions.
[2020-07-21 01:05:51,400 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:51,400 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 17
[2020-07-21 01:05:51,401 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:51,403 INFO  L225             Difference]: With dead ends: 87
[2020-07-21 01:05:51,403 INFO  L226             Difference]: Without dead ends: 54
[2020-07-21 01:05:51,406 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:51,410 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2020-07-21 01:05:51,424 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52.
[2020-07-21 01:05:51,425 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-07-21 01:05:51,427 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions.
[2020-07-21 01:05:51,427 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17
[2020-07-21 01:05:51,428 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:51,428 INFO  L479      AbstractCegarLoop]: Abstraction has 52 states and 89 transitions.
[2020-07-21 01:05:51,428 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:51,429 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions.
[2020-07-21 01:05:51,432 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-21 01:05:51,433 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:51,433 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:05:51,647 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:51,648 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:51,649 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:51,650 INFO  L82        PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times
[2020-07-21 01:05:51,651 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:51,651 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656826986]
[2020-07-21 01:05:51,651 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
[2020-07-21 01:05:51,754 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 01:05:51,755 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:51,756 INFO  L263         TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:51,761 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:51,788 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:51,789 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:51,792 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656826986]
[2020-07-21 01:05:51,793 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:51,793 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:51,793 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606292518]
[2020-07-21 01:05:51,794 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:51,794 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:51,795 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:51,796 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:51,796 INFO  L87              Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states.
[2020-07-21 01:05:51,850 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:51,852 INFO  L93              Difference]: Finished difference Result 81 states and 135 transitions.
[2020-07-21 01:05:51,855 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:51,856 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 18
[2020-07-21 01:05:51,856 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:51,860 INFO  L225             Difference]: With dead ends: 81
[2020-07-21 01:05:51,860 INFO  L226             Difference]: Without dead ends: 57
[2020-07-21 01:05:51,861 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:51,862 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2020-07-21 01:05:51,886 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55.
[2020-07-21 01:05:51,886 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-07-21 01:05:51,891 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions.
[2020-07-21 01:05:51,892 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18
[2020-07-21 01:05:51,892 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:51,896 INFO  L479      AbstractCegarLoop]: Abstraction has 55 states and 91 transitions.
[2020-07-21 01:05:51,896 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:51,896 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions.
[2020-07-21 01:05:51,897 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-21 01:05:51,898 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:51,898 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:05:52,114 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:52,116 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:52,117 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:52,117 INFO  L82        PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times
[2020-07-21 01:05:52,118 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:52,118 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354527721]
[2020-07-21 01:05:52,118 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
[2020-07-21 01:05:52,190 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:52,191 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:52,193 INFO  L263         TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:52,196 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:52,214 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:52,215 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:52,215 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354527721]
[2020-07-21 01:05:52,216 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:52,216 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:52,217 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920137539]
[2020-07-21 01:05:52,218 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:52,218 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:52,219 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:52,219 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:52,220 INFO  L87              Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states.
[2020-07-21 01:05:52,249 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:52,250 INFO  L93              Difference]: Finished difference Result 100 states and 168 transitions.
[2020-07-21 01:05:52,251 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:52,251 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 18
[2020-07-21 01:05:52,251 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:52,253 INFO  L225             Difference]: With dead ends: 100
[2020-07-21 01:05:52,254 INFO  L226             Difference]: Without dead ends: 98
[2020-07-21 01:05:52,255 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:52,256 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-07-21 01:05:52,266 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72.
[2020-07-21 01:05:52,266 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 72 states.
[2020-07-21 01:05:52,269 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions.
[2020-07-21 01:05:52,270 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18
[2020-07-21 01:05:52,271 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:52,271 INFO  L479      AbstractCegarLoop]: Abstraction has 72 states and 120 transitions.
[2020-07-21 01:05:52,271 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:52,271 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions.
[2020-07-21 01:05:52,272 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-21 01:05:52,272 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:52,273 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:05:52,487 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:52,488 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:52,489 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:52,489 INFO  L82        PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times
[2020-07-21 01:05:52,490 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:52,490 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527877843]
[2020-07-21 01:05:52,490 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
[2020-07-21 01:05:52,542 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:52,543 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:52,544 INFO  L263         TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:52,547 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:52,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:52,558 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:52,559 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527877843]
[2020-07-21 01:05:52,559 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:52,559 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:52,560 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156517264]
[2020-07-21 01:05:52,560 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:52,561 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:52,561 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:52,562 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:52,562 INFO  L87              Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states.
[2020-07-21 01:05:52,601 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:52,601 INFO  L93              Difference]: Finished difference Result 164 states and 278 transitions.
[2020-07-21 01:05:52,602 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:52,602 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 18
[2020-07-21 01:05:52,603 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:52,604 INFO  L225             Difference]: With dead ends: 164
[2020-07-21 01:05:52,605 INFO  L226             Difference]: Without dead ends: 100
[2020-07-21 01:05:52,607 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:52,608 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2020-07-21 01:05:52,619 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98.
[2020-07-21 01:05:52,619 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 98 states.
[2020-07-21 01:05:52,621 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions.
[2020-07-21 01:05:52,622 INFO  L78                 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18
[2020-07-21 01:05:52,622 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:52,623 INFO  L479      AbstractCegarLoop]: Abstraction has 98 states and 162 transitions.
[2020-07-21 01:05:52,623 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:52,623 INFO  L276                IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions.
[2020-07-21 01:05:52,624 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-21 01:05:52,625 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:52,625 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:05:52,837 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:52,838 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:52,839 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:52,840 INFO  L82        PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times
[2020-07-21 01:05:52,840 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:52,841 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019190665]
[2020-07-21 01:05:52,841 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 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
[2020-07-21 01:05:52,924 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:52,925 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:52,926 INFO  L263         TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:52,929 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:52,940 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:52,941 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:52,942 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019190665]
[2020-07-21 01:05:52,942 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:52,943 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:52,943 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125983531]
[2020-07-21 01:05:52,943 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:52,944 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:52,944 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:52,944 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:52,945 INFO  L87              Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states.
[2020-07-21 01:05:52,995 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:52,996 INFO  L93              Difference]: Finished difference Result 147 states and 241 transitions.
[2020-07-21 01:05:52,996 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:52,997 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 19
[2020-07-21 01:05:52,997 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:52,999 INFO  L225             Difference]: With dead ends: 147
[2020-07-21 01:05:52,999 INFO  L226             Difference]: Without dead ends: 102
[2020-07-21 01:05:53,007 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:53,011 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 102 states.
[2020-07-21 01:05:53,024 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100.
[2020-07-21 01:05:53,025 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 100 states.
[2020-07-21 01:05:53,027 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions.
[2020-07-21 01:05:53,027 INFO  L78                 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19
[2020-07-21 01:05:53,028 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:53,028 INFO  L479      AbstractCegarLoop]: Abstraction has 100 states and 162 transitions.
[2020-07-21 01:05:53,028 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:53,028 INFO  L276                IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions.
[2020-07-21 01:05:53,030 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-21 01:05:53,030 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:53,030 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:05:53,245 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:53,246 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:53,246 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:53,247 INFO  L82        PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times
[2020-07-21 01:05:53,247 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:53,248 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224254297]
[2020-07-21 01:05:53,249 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
[2020-07-21 01:05:53,306 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:53,307 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:53,308 INFO  L263         TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:53,310 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:53,321 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:53,322 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:53,325 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224254297]
[2020-07-21 01:05:53,326 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:53,326 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:53,326 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581374522]
[2020-07-21 01:05:53,327 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:53,327 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:53,327 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:53,328 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:53,328 INFO  L87              Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states.
[2020-07-21 01:05:53,361 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:53,362 INFO  L93              Difference]: Finished difference Result 180 states and 296 transitions.
[2020-07-21 01:05:53,362 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:53,363 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 19
[2020-07-21 01:05:53,363 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:53,367 INFO  L225             Difference]: With dead ends: 180
[2020-07-21 01:05:53,367 INFO  L226             Difference]: Without dead ends: 178
[2020-07-21 01:05:53,368 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:53,369 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 178 states.
[2020-07-21 01:05:53,402 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136.
[2020-07-21 01:05:53,402 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 136 states.
[2020-07-21 01:05:53,407 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions.
[2020-07-21 01:05:53,408 INFO  L78                 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19
[2020-07-21 01:05:53,408 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:53,408 INFO  L479      AbstractCegarLoop]: Abstraction has 136 states and 218 transitions.
[2020-07-21 01:05:53,410 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:53,410 INFO  L276                IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions.
[2020-07-21 01:05:53,415 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-21 01:05:53,415 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:53,416 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:05:53,621 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:53,622 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:53,623 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:53,623 INFO  L82        PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times
[2020-07-21 01:05:53,624 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:53,624 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962616880]
[2020-07-21 01:05:53,625 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
[2020-07-21 01:05:53,668 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:53,669 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:53,670 INFO  L263         TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:53,672 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:53,689 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:53,690 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:53,691 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962616880]
[2020-07-21 01:05:53,691 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:53,691 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:53,692 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535098130]
[2020-07-21 01:05:53,692 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:53,692 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:53,693 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:53,693 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:53,693 INFO  L87              Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states.
[2020-07-21 01:05:53,720 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:53,720 INFO  L93              Difference]: Finished difference Result 312 states and 504 transitions.
[2020-07-21 01:05:53,722 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:53,722 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 19
[2020-07-21 01:05:53,722 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:53,724 INFO  L225             Difference]: With dead ends: 312
[2020-07-21 01:05:53,724 INFO  L226             Difference]: Without dead ends: 186
[2020-07-21 01:05:53,726 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:53,727 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 186 states.
[2020-07-21 01:05:53,744 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184.
[2020-07-21 01:05:53,748 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 184 states.
[2020-07-21 01:05:53,753 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions.
[2020-07-21 01:05:53,754 INFO  L78                 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19
[2020-07-21 01:05:53,755 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:53,755 INFO  L479      AbstractCegarLoop]: Abstraction has 184 states and 290 transitions.
[2020-07-21 01:05:53,756 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:53,756 INFO  L276                IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions.
[2020-07-21 01:05:53,757 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-21 01:05:53,757 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:53,758 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]
[2020-07-21 01:05:53,971 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:53,972 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:53,973 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:53,973 INFO  L82        PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times
[2020-07-21 01:05:53,974 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:53,974 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908856182]
[2020-07-21 01:05:53,975 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
[2020-07-21 01:05:54,022 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:54,023 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:54,025 INFO  L263         TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:54,027 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:54,038 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:54,038 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:54,039 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908856182]
[2020-07-21 01:05:54,039 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:54,040 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:54,040 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519448810]
[2020-07-21 01:05:54,041 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:54,042 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:54,042 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:54,043 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:54,043 INFO  L87              Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states.
[2020-07-21 01:05:54,106 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:54,107 INFO  L93              Difference]: Finished difference Result 276 states and 432 transitions.
[2020-07-21 01:05:54,108 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:54,108 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 20
[2020-07-21 01:05:54,108 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:54,112 INFO  L225             Difference]: With dead ends: 276
[2020-07-21 01:05:54,113 INFO  L226             Difference]: Without dead ends: 190
[2020-07-21 01:05:54,119 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:54,127 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 190 states.
[2020-07-21 01:05:54,159 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 188.
[2020-07-21 01:05:54,160 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 188 states.
[2020-07-21 01:05:54,162 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 290 transitions.
[2020-07-21 01:05:54,162 INFO  L78                 Accepts]: Start accepts. Automaton has 188 states and 290 transitions. Word has length 20
[2020-07-21 01:05:54,165 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:54,166 INFO  L479      AbstractCegarLoop]: Abstraction has 188 states and 290 transitions.
[2020-07-21 01:05:54,166 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:54,166 INFO  L276                IsEmpty]: Start isEmpty. Operand 188 states and 290 transitions.
[2020-07-21 01:05:54,167 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-21 01:05:54,168 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:54,171 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]
[2020-07-21 01:05:54,372 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:54,374 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:54,374 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:54,375 INFO  L82        PathProgramCache]: Analyzing trace with hash -2003210133, now seen corresponding path program 1 times
[2020-07-21 01:05:54,375 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:54,377 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508631255]
[2020-07-21 01:05:54,377 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
[2020-07-21 01:05:54,439 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:54,439 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:54,441 INFO  L263         TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:54,444 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:54,454 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:54,455 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:54,455 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508631255]
[2020-07-21 01:05:54,455 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:54,456 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:54,456 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062138008]
[2020-07-21 01:05:54,457 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:54,457 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:54,458 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:54,458 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:54,458 INFO  L87              Difference]: Start difference. First operand 188 states and 290 transitions. Second operand 3 states.
[2020-07-21 01:05:54,489 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:54,489 INFO  L93              Difference]: Finished difference Result 332 states and 520 transitions.
[2020-07-21 01:05:54,490 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:54,491 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 20
[2020-07-21 01:05:54,491 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:54,494 INFO  L225             Difference]: With dead ends: 332
[2020-07-21 01:05:54,494 INFO  L226             Difference]: Without dead ends: 330
[2020-07-21 01:05:54,495 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:54,497 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 330 states.
[2020-07-21 01:05:54,512 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 264.
[2020-07-21 01:05:54,513 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 264 states.
[2020-07-21 01:05:54,516 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions.
[2020-07-21 01:05:54,517 INFO  L78                 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20
[2020-07-21 01:05:54,518 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:54,518 INFO  L479      AbstractCegarLoop]: Abstraction has 264 states and 398 transitions.
[2020-07-21 01:05:54,518 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:54,518 INFO  L276                IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions.
[2020-07-21 01:05:54,520 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-21 01:05:54,520 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:54,521 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]
[2020-07-21 01:05:54,735 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:54,735 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:54,736 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:54,736 INFO  L82        PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times
[2020-07-21 01:05:54,736 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:54,736 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849290566]
[2020-07-21 01:05:54,737 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
[2020-07-21 01:05:54,788 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:54,789 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:54,790 INFO  L263         TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:54,791 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:54,801 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:54,802 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:54,803 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849290566]
[2020-07-21 01:05:54,803 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:54,803 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:54,804 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895705455]
[2020-07-21 01:05:54,804 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:54,805 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:54,805 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:54,805 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:54,805 INFO  L87              Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states.
[2020-07-21 01:05:54,849 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:54,849 INFO  L93              Difference]: Finished difference Result 604 states and 912 transitions.
[2020-07-21 01:05:54,850 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:54,850 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 20
[2020-07-21 01:05:54,850 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:54,853 INFO  L225             Difference]: With dead ends: 604
[2020-07-21 01:05:54,853 INFO  L226             Difference]: Without dead ends: 354
[2020-07-21 01:05:54,856 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:54,857 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 354 states.
[2020-07-21 01:05:54,871 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352.
[2020-07-21 01:05:54,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 352 states.
[2020-07-21 01:05:54,875 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions.
[2020-07-21 01:05:54,876 INFO  L78                 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20
[2020-07-21 01:05:54,876 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:54,876 INFO  L479      AbstractCegarLoop]: Abstraction has 352 states and 518 transitions.
[2020-07-21 01:05:54,877 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:54,877 INFO  L276                IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions.
[2020-07-21 01:05:54,878 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-21 01:05:54,879 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:54,879 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]
[2020-07-21 01:05:55,093 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:55,094 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:55,095 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:55,095 INFO  L82        PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times
[2020-07-21 01:05:55,096 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:55,097 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322086459]
[2020-07-21 01:05:55,097 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
[2020-07-21 01:05:55,143 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 01:05:55,143 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:55,145 INFO  L263         TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:55,147 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:55,167 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:55,168 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:55,168 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322086459]
[2020-07-21 01:05:55,168 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:55,168 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:55,169 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847558255]
[2020-07-21 01:05:55,169 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:55,169 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:55,170 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:55,170 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:55,170 INFO  L87              Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states.
[2020-07-21 01:05:55,199 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:55,199 INFO  L93              Difference]: Finished difference Result 528 states and 772 transitions.
[2020-07-21 01:05:55,200 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:55,200 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-21 01:05:55,201 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:55,204 INFO  L225             Difference]: With dead ends: 528
[2020-07-21 01:05:55,205 INFO  L226             Difference]: Without dead ends: 362
[2020-07-21 01:05:55,207 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:55,208 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 362 states.
[2020-07-21 01:05:55,225 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 360.
[2020-07-21 01:05:55,226 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 360 states.
[2020-07-21 01:05:55,229 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 518 transitions.
[2020-07-21 01:05:55,230 INFO  L78                 Accepts]: Start accepts. Automaton has 360 states and 518 transitions. Word has length 21
[2020-07-21 01:05:55,230 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:55,230 INFO  L479      AbstractCegarLoop]: Abstraction has 360 states and 518 transitions.
[2020-07-21 01:05:55,231 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:55,231 INFO  L276                IsEmpty]: Start isEmpty. Operand 360 states and 518 transitions.
[2020-07-21 01:05:55,232 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-21 01:05:55,233 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:55,233 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]
[2020-07-21 01:05:55,443 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:55,444 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:55,444 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:55,445 INFO  L82        PathProgramCache]: Analyzing trace with hash -1268692026, now seen corresponding path program 1 times
[2020-07-21 01:05:55,445 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:55,446 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855764073]
[2020-07-21 01:05:55,446 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
[2020-07-21 01:05:55,497 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:55,498 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:55,499 INFO  L263         TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:55,502 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:55,518 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:55,519 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:55,519 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855764073]
[2020-07-21 01:05:55,520 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:55,520 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:55,520 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849977834]
[2020-07-21 01:05:55,521 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:55,521 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:55,522 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:55,522 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:55,523 INFO  L87              Difference]: Start difference. First operand 360 states and 518 transitions. Second operand 3 states.
[2020-07-21 01:05:55,556 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:55,557 INFO  L93              Difference]: Finished difference Result 620 states and 904 transitions.
[2020-07-21 01:05:55,558 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:55,558 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-21 01:05:55,559 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:55,564 INFO  L225             Difference]: With dead ends: 620
[2020-07-21 01:05:55,564 INFO  L226             Difference]: Without dead ends: 618
[2020-07-21 01:05:55,566 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:55,568 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 618 states.
[2020-07-21 01:05:55,592 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 520.
[2020-07-21 01:05:55,593 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 520 states.
[2020-07-21 01:05:55,597 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 726 transitions.
[2020-07-21 01:05:55,597 INFO  L78                 Accepts]: Start accepts. Automaton has 520 states and 726 transitions. Word has length 21
[2020-07-21 01:05:55,598 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:55,598 INFO  L479      AbstractCegarLoop]: Abstraction has 520 states and 726 transitions.
[2020-07-21 01:05:55,598 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:55,598 INFO  L276                IsEmpty]: Start isEmpty. Operand 520 states and 726 transitions.
[2020-07-21 01:05:55,601 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-21 01:05:55,601 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:55,601 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]
[2020-07-21 01:05:55,816 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:55,817 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:55,817 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:55,817 INFO  L82        PathProgramCache]: Analyzing trace with hash -1661719036, now seen corresponding path program 1 times
[2020-07-21 01:05:55,818 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:55,819 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305706039]
[2020-07-21 01:05:55,819 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
[2020-07-21 01:05:55,884 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:55,886 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:55,888 INFO  L263         TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:55,889 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:55,935 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:55,936 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:55,937 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305706039]
[2020-07-21 01:05:55,937 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:55,937 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:55,937 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443951034]
[2020-07-21 01:05:55,938 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:55,938 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:55,938 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:55,938 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:55,938 INFO  L87              Difference]: Start difference. First operand 520 states and 726 transitions. Second operand 3 states.
[2020-07-21 01:05:55,972 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:55,973 INFO  L93              Difference]: Finished difference Result 1180 states and 1640 transitions.
[2020-07-21 01:05:55,973 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:55,974 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-21 01:05:55,974 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:55,979 INFO  L225             Difference]: With dead ends: 1180
[2020-07-21 01:05:55,980 INFO  L226             Difference]: Without dead ends: 682
[2020-07-21 01:05:55,982 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:55,983 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 682 states.
[2020-07-21 01:05:56,008 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 680.
[2020-07-21 01:05:56,009 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 680 states.
[2020-07-21 01:05:56,014 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 918 transitions.
[2020-07-21 01:05:56,015 INFO  L78                 Accepts]: Start accepts. Automaton has 680 states and 918 transitions. Word has length 21
[2020-07-21 01:05:56,015 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:56,015 INFO  L479      AbstractCegarLoop]: Abstraction has 680 states and 918 transitions.
[2020-07-21 01:05:56,016 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:56,016 INFO  L276                IsEmpty]: Start isEmpty. Operand 680 states and 918 transitions.
[2020-07-21 01:05:56,018 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-21 01:05:56,018 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:56,018 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]
[2020-07-21 01:05:56,232 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:56,233 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:56,234 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:56,235 INFO  L82        PathProgramCache]: Analyzing trace with hash -674531426, now seen corresponding path program 1 times
[2020-07-21 01:05:56,235 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:56,236 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288375088]
[2020-07-21 01:05:56,236 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
[2020-07-21 01:05:56,291 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:56,292 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:56,293 INFO  L263         TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:56,296 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:56,322 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:56,322 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:56,324 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288375088]
[2020-07-21 01:05:56,325 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:56,325 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:56,325 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252875039]
[2020-07-21 01:05:56,326 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:56,327 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:56,327 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:56,327 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:56,328 INFO  L87              Difference]: Start difference. First operand 680 states and 918 transitions. Second operand 3 states.
[2020-07-21 01:05:56,374 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:56,374 INFO  L93              Difference]: Finished difference Result 1020 states and 1368 transitions.
[2020-07-21 01:05:56,375 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:56,376 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-21 01:05:56,378 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:56,385 INFO  L225             Difference]: With dead ends: 1020
[2020-07-21 01:05:56,385 INFO  L226             Difference]: Without dead ends: 698
[2020-07-21 01:05:56,391 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:56,393 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 698 states.
[2020-07-21 01:05:56,432 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 696.
[2020-07-21 01:05:56,432 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 696 states.
[2020-07-21 01:05:56,438 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 918 transitions.
[2020-07-21 01:05:56,439 INFO  L78                 Accepts]: Start accepts. Automaton has 696 states and 918 transitions. Word has length 22
[2020-07-21 01:05:56,439 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:56,440 INFO  L479      AbstractCegarLoop]: Abstraction has 696 states and 918 transitions.
[2020-07-21 01:05:56,440 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:56,441 INFO  L276                IsEmpty]: Start isEmpty. Operand 696 states and 918 transitions.
[2020-07-21 01:05:56,444 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-21 01:05:56,444 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:56,444 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]
[2020-07-21 01:05:56,658 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:56,660 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:56,660 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:56,660 INFO  L82        PathProgramCache]: Analyzing trace with hash 26533152, now seen corresponding path program 1 times
[2020-07-21 01:05:56,661 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:56,661 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752015188]
[2020-07-21 01:05:56,662 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
[2020-07-21 01:05:56,731 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:56,731 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:56,733 INFO  L263         TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:56,734 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:56,743 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:56,744 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:56,744 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752015188]
[2020-07-21 01:05:56,745 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:56,745 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:56,745 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966758838]
[2020-07-21 01:05:56,746 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:56,746 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:56,747 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:56,747 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:56,747 INFO  L87              Difference]: Start difference. First operand 696 states and 918 transitions. Second operand 3 states.
[2020-07-21 01:05:56,796 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:56,796 INFO  L93              Difference]: Finished difference Result 1164 states and 1544 transitions.
[2020-07-21 01:05:56,797 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:56,797 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-21 01:05:56,798 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:56,807 INFO  L225             Difference]: With dead ends: 1164
[2020-07-21 01:05:56,808 INFO  L226             Difference]: Without dead ends: 1162
[2020-07-21 01:05:56,809 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:56,812 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1162 states.
[2020-07-21 01:05:56,860 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1032.
[2020-07-21 01:05:56,861 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1032 states.
[2020-07-21 01:05:56,869 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1318 transitions.
[2020-07-21 01:05:56,870 INFO  L78                 Accepts]: Start accepts. Automaton has 1032 states and 1318 transitions. Word has length 22
[2020-07-21 01:05:56,870 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:56,870 INFO  L479      AbstractCegarLoop]: Abstraction has 1032 states and 1318 transitions.
[2020-07-21 01:05:56,870 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:56,870 INFO  L276                IsEmpty]: Start isEmpty. Operand 1032 states and 1318 transitions.
[2020-07-21 01:05:56,873 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-21 01:05:56,874 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:56,874 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]
[2020-07-21 01:05:57,087 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:57,088 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:57,089 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:57,089 INFO  L82        PathProgramCache]: Analyzing trace with hash -366493858, now seen corresponding path program 1 times
[2020-07-21 01:05:57,090 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:57,090 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841305570]
[2020-07-21 01:05:57,091 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
[2020-07-21 01:05:57,149 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:57,150 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:57,151 INFO  L263         TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:57,153 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:57,166 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:57,166 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:57,167 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841305570]
[2020-07-21 01:05:57,167 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:57,168 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:57,168 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453090888]
[2020-07-21 01:05:57,169 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:57,169 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:57,176 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:57,178 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:57,179 INFO  L87              Difference]: Start difference. First operand 1032 states and 1318 transitions. Second operand 3 states.
[2020-07-21 01:05:57,240 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:57,240 INFO  L93              Difference]: Finished difference Result 2316 states and 2920 transitions.
[2020-07-21 01:05:57,241 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:57,241 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-21 01:05:57,242 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:57,251 INFO  L225             Difference]: With dead ends: 2316
[2020-07-21 01:05:57,251 INFO  L226             Difference]: Without dead ends: 1322
[2020-07-21 01:05:57,257 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:57,261 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1322 states.
[2020-07-21 01:05:57,326 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1320.
[2020-07-21 01:05:57,327 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1320 states.
[2020-07-21 01:05:57,339 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1320 states to 1320 states and 1606 transitions.
[2020-07-21 01:05:57,340 INFO  L78                 Accepts]: Start accepts. Automaton has 1320 states and 1606 transitions. Word has length 22
[2020-07-21 01:05:57,340 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:57,341 INFO  L479      AbstractCegarLoop]: Abstraction has 1320 states and 1606 transitions.
[2020-07-21 01:05:57,341 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:57,341 INFO  L276                IsEmpty]: Start isEmpty. Operand 1320 states and 1606 transitions.
[2020-07-21 01:05:57,345 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-21 01:05:57,346 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:57,346 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]
[2020-07-21 01:05:57,560 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:57,562 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:57,562 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:57,562 INFO  L82        PathProgramCache]: Analyzing trace with hash 822743769, now seen corresponding path program 1 times
[2020-07-21 01:05:57,563 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:57,563 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587096501]
[2020-07-21 01:05:57,567 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
[2020-07-21 01:05:57,621 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:57,622 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:57,624 INFO  L263         TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:57,626 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:57,640 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:57,641 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:57,641 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587096501]
[2020-07-21 01:05:57,642 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:57,642 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:57,646 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577270708]
[2020-07-21 01:05:57,646 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:57,647 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:57,647 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:57,648 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:57,648 INFO  L87              Difference]: Start difference. First operand 1320 states and 1606 transitions. Second operand 3 states.
[2020-07-21 01:05:57,698 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:57,699 INFO  L93              Difference]: Finished difference Result 1980 states and 2392 transitions.
[2020-07-21 01:05:57,699 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:57,699 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-21 01:05:57,700 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:57,709 INFO  L225             Difference]: With dead ends: 1980
[2020-07-21 01:05:57,709 INFO  L226             Difference]: Without dead ends: 1354
[2020-07-21 01:05:57,712 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:57,716 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1354 states.
[2020-07-21 01:05:57,770 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1352.
[2020-07-21 01:05:57,770 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1352 states.
[2020-07-21 01:05:57,778 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1352 states to 1352 states and 1606 transitions.
[2020-07-21 01:05:57,779 INFO  L78                 Accepts]: Start accepts. Automaton has 1352 states and 1606 transitions. Word has length 23
[2020-07-21 01:05:57,779 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:57,780 INFO  L479      AbstractCegarLoop]: Abstraction has 1352 states and 1606 transitions.
[2020-07-21 01:05:57,780 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:57,780 INFO  L276                IsEmpty]: Start isEmpty. Operand 1352 states and 1606 transitions.
[2020-07-21 01:05:57,783 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-21 01:05:57,784 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:57,784 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]
[2020-07-21 01:05:57,998 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:57,999 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:58,000 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:58,000 INFO  L82        PathProgramCache]: Analyzing trace with hash 1523808347, now seen corresponding path program 1 times
[2020-07-21 01:05:58,001 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:58,001 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773451336]
[2020-07-21 01:05:58,001 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
[2020-07-21 01:05:58,074 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:58,075 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:58,076 INFO  L263         TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:58,078 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:58,100 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:58,101 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:58,101 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773451336]
[2020-07-21 01:05:58,102 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:58,102 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:58,102 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952713474]
[2020-07-21 01:05:58,105 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:58,105 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:58,106 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:58,106 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:58,108 INFO  L87              Difference]: Start difference. First operand 1352 states and 1606 transitions. Second operand 3 states.
[2020-07-21 01:05:58,179 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:58,180 INFO  L93              Difference]: Finished difference Result 2186 states and 2567 transitions.
[2020-07-21 01:05:58,181 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:58,181 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-21 01:05:58,181 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:58,196 INFO  L225             Difference]: With dead ends: 2186
[2020-07-21 01:05:58,197 INFO  L226             Difference]: Without dead ends: 2184
[2020-07-21 01:05:58,200 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:58,208 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2184 states.
[2020-07-21 01:05:58,286 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2056.
[2020-07-21 01:05:58,287 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2056 states.
[2020-07-21 01:05:58,300 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 2374 transitions.
[2020-07-21 01:05:58,301 INFO  L78                 Accepts]: Start accepts. Automaton has 2056 states and 2374 transitions. Word has length 23
[2020-07-21 01:05:58,302 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:58,302 INFO  L479      AbstractCegarLoop]: Abstraction has 2056 states and 2374 transitions.
[2020-07-21 01:05:58,302 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:58,302 INFO  L276                IsEmpty]: Start isEmpty. Operand 2056 states and 2374 transitions.
[2020-07-21 01:05:58,309 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-21 01:05:58,309 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:05:58,309 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]
[2020-07-21 01:05:58,525 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:58,525 INFO  L427      AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:05:58,526 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:05:58,526 INFO  L82        PathProgramCache]: Analyzing trace with hash 1130781337, now seen corresponding path program 1 times
[2020-07-21 01:05:58,526 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:05:58,527 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2568197]
[2020-07-21 01:05:58,527 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
[2020-07-21 01:05:58,578 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:05:58,579 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:05:58,580 INFO  L263         TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:05:58,589 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:05:58,598 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:05:58,598 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:05:58,599 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2568197]
[2020-07-21 01:05:58,599 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:05:58,599 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:05:58,600 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518398123]
[2020-07-21 01:05:58,604 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:05:58,605 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:05:58,605 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:05:58,606 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:58,606 INFO  L87              Difference]: Start difference. First operand 2056 states and 2374 transitions. Second operand 3 states.
[2020-07-21 01:05:58,705 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:05:58,706 INFO  L93              Difference]: Finished difference Result 4552 states and 5126 transitions.
[2020-07-21 01:05:58,707 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:05:58,707 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-21 01:05:58,708 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:05:58,708 INFO  L225             Difference]: With dead ends: 4552
[2020-07-21 01:05:58,708 INFO  L226             Difference]: Without dead ends: 0
[2020-07-21 01:05:58,719 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:05:58,719 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-21 01:05:58,719 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-21 01:05:58,720 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-21 01:05:58,720 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-21 01:05:58,720 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23
[2020-07-21 01:05:58,720 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:05:58,721 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-21 01:05:58,721 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:05:58,721 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-21 01:05:58,721 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-21 01:05:58,934 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:05:58,937 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-21 01:05:59,017 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-07-21 01:05:59,017 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-07-21 01:05:59,018 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-07-21 01:05:59,018 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-07-21 01:05:59,018 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-07-21 01:05:59,018 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-07-21 01:05:59,018 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 4 121)  no Hoare annotation was computed.
[2020-07-21 01:05:59,018 INFO  L268        CegarLoopResult]: For program point  L102(line 102)  no Hoare annotation was computed.
[2020-07-21 01:05:59,018 INFO  L268        CegarLoopResult]: For program point  L86-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,019 INFO  L271        CegarLoopResult]: At program point  L111-1(lines 30 116)  the Hoare annotation is:  true
[2020-07-21 01:05:59,019 INFO  L268        CegarLoopResult]: For program point  L87(line 87)  no Hoare annotation was computed.
[2020-07-21 01:05:59,019 INFO  L268        CegarLoopResult]: For program point  L112(line 112)  no Hoare annotation was computed.
[2020-07-21 01:05:59,019 INFO  L264        CegarLoopResult]: At program point  L112-1(lines 5 121)  the Hoare annotation is:  false
[2020-07-21 01:05:59,019 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 4 121)  no Hoare annotation was computed.
[2020-07-21 01:05:59,019 INFO  L268        CegarLoopResult]: For program point  L71-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,020 INFO  L268        CegarLoopResult]: For program point  mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119)  no Hoare annotation was computed.
[2020-07-21 01:05:59,020 INFO  L268        CegarLoopResult]: For program point  L96-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,020 INFO  L268        CegarLoopResult]: For program point  L63-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,020 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 4 121)  the Hoare annotation is:  true
[2020-07-21 01:05:59,020 INFO  L268        CegarLoopResult]: For program point  L55-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,020 INFO  L268        CegarLoopResult]: For program point  L97(line 97)  no Hoare annotation was computed.
[2020-07-21 01:05:59,021 INFO  L268        CegarLoopResult]: For program point  L81-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,021 INFO  L268        CegarLoopResult]: For program point  L106-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,021 INFO  L268        CegarLoopResult]: For program point  L32(lines 32 34)  no Hoare annotation was computed.
[2020-07-21 01:05:59,021 INFO  L268        CegarLoopResult]: For program point  L82(line 82)  no Hoare annotation was computed.
[2020-07-21 01:05:59,023 INFO  L268        CegarLoopResult]: For program point  L107(line 107)  no Hoare annotation was computed.
[2020-07-21 01:05:59,023 INFO  L268        CegarLoopResult]: For program point  L91-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,023 INFO  L268        CegarLoopResult]: For program point  L75-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,023 INFO  L268        CegarLoopResult]: For program point  L67-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,023 INFO  L268        CegarLoopResult]: For program point  L92(line 92)  no Hoare annotation was computed.
[2020-07-21 01:05:59,024 INFO  L268        CegarLoopResult]: For program point  L59-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,024 INFO  L271        CegarLoopResult]: At program point  L117(lines 5 121)  the Hoare annotation is:  true
[2020-07-21 01:05:59,024 INFO  L268        CegarLoopResult]: For program point  L51(lines 51 53)  no Hoare annotation was computed.
[2020-07-21 01:05:59,024 INFO  L268        CegarLoopResult]: For program point  L51-2(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,024 INFO  L268        CegarLoopResult]: For program point  L101-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-21 01:05:59,047 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:05:59 BoogieIcfgContainer
[2020-07-21 01:05:59,047 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-21 01:05:59,051 INFO  L168              Benchmark]: Toolchain (without parser) took 10024.97 ms. Allocated memory was 143.1 MB in the beginning and 253.2 MB in the end (delta: 110.1 MB). Free memory was 99.7 MB in the beginning and 150.8 MB in the end (delta: -51.1 MB). Peak memory consumption was 59.0 MB. Max. memory is 7.1 GB.
[2020-07-21 01:05:59,052 INFO  L168              Benchmark]: CDTParser took 1.46 ms. Allocated memory is still 143.1 MB. Free memory was 118.1 MB in the beginning and 117.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
[2020-07-21 01:05:59,053 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 637.66 ms. Allocated memory is still 143.1 MB. Free memory was 99.3 MB in the beginning and 89.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB.
[2020-07-21 01:05:59,053 INFO  L168              Benchmark]: Boogie Preprocessor took 244.55 ms. Allocated memory was 143.1 MB in the beginning and 201.3 MB in the end (delta: 58.2 MB). Free memory was 89.0 MB in the beginning and 179.5 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
[2020-07-21 01:05:59,054 INFO  L168              Benchmark]: RCFGBuilder took 547.19 ms. Allocated memory is still 201.3 MB. Free memory was 179.5 MB in the beginning and 162.8 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB.
[2020-07-21 01:05:59,054 INFO  L168              Benchmark]: TraceAbstraction took 8584.64 ms. Allocated memory was 201.3 MB in the beginning and 253.2 MB in the end (delta: 51.9 MB). Free memory was 162.8 MB in the beginning and 150.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB.
[2020-07-21 01:05:59,057 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 1.46 ms. Allocated memory is still 143.1 MB. Free memory was 118.1 MB in the beginning and 117.8 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 637.66 ms. Allocated memory is still 143.1 MB. Free memory was 99.3 MB in the beginning and 89.0 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 244.55 ms. Allocated memory was 143.1 MB in the beginning and 201.3 MB in the end (delta: 58.2 MB). Free memory was 89.0 MB in the beginning and 179.5 MB in the end (delta: -90.4 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 547.19 ms. Allocated memory is still 201.3 MB. Free memory was 179.5 MB in the beginning and 162.8 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 8584.64 ms. Allocated memory was 201.3 MB in the beginning and 253.2 MB in the end (delta: 51.9 MB). Free memory was 162.8 MB in the beginning and 150.8 MB in the end (delta: 12.0 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 119]: 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: 30]: Loop Invariant
    Derived loop invariant: 1
  - InvariantResult [Line: 5]: Loop Invariant
    Derived loop invariant: 0
  - InvariantResult [Line: 5]: Loop Invariant
    Derived loop invariant: 1
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 8.3s, OverallIterations: 20, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1238 SDtfs, 574 SDslu, 829 SDs, 0 SdLazy, 107 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 383 GetRequests, 363 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2056occurred in iteration=19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 20 MinimizatonAttempts, 530 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 403 NumberOfCodeBlocks, 395 NumberOfCodeBlocksAsserted, 77 NumberOfCheckSat, 383 ConstructedInterpolants, 0 QuantifiedInterpolants, 13856 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1674 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 20 InterpolantComputations, 20 PerfectInterpolantSequences, 0/0 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...