java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/heap-data/process_queue.i


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


This is Ultimate 0.1.24-13a467a-m
[2019-10-15 01:59:47,379 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-15 01:59:47,382 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-15 01:59:47,398 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-15 01:59:47,399 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-15 01:59:47,401 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-15 01:59:47,403 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-15 01:59:47,414 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-15 01:59:47,417 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-15 01:59:47,417 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-15 01:59:47,419 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-10-15 01:59:47,419 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-15 01:59:47,420 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-15 01:59:47,422 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-15 01:59:47,423 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-15 01:59:47,425 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-15 01:59:47,425 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-15 01:59:47,426 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-15 01:59:47,427 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-15 01:59:47,429 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-15 01:59:47,431 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-15 01:59:47,432 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-15 01:59:47,432 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-15 01:59:47,433 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-15 01:59:47,435 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-15 01:59:47,435 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-15 01:59:47,436 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-15 01:59:47,436 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-15 01:59:47,437 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2019-10-15 01:59:47,438 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2019-10-15 01:59:47,438 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2019-10-15 01:59:47,439 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2019-10-15 01:59:47,439 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2019-10-15 01:59:47,440 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2019-10-15 01:59:47,441 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2019-10-15 01:59:47,441 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2019-10-15 01:59:47,442 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2019-10-15 01:59:47,442 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2019-10-15 01:59:47,442 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2019-10-15 01:59:47,443 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2019-10-15 01:59:47,444 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-15 01:59:47,444 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-15 01:59:47,458 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-15 01:59:47,458 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-15 01:59:47,459 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-15 01:59:47,459 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-15 01:59:47,459 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-15 01:59:47,460 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-15 01:59:47,460 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-15 01:59:47,460 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-15 01:59:47,460 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-15 01:59:47,460 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-15 01:59:47,461 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-15 01:59:47,461 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-15 01:59:47,461 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-15 01:59:47,461 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-15 01:59:47,461 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-15 01:59:47,462 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-15 01:59:47,462 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-15 01:59:47,462 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-15 01:59:47,462 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-15 01:59:47,462 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-15 01:59:47,463 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-15 01:59:47,463 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-15 01:59:47,463 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-15 01:59:47,463 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-15 01:59:47,463 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-15 01:59:47,464 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-15 01:59:47,464 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-15 01:59:47,464 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-15 01:59:47,464 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK
[2019-10-15 01:59:47,725 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-15 01:59:47,738 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-15 01:59:47,741 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-15 01:59:47,743 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-15 01:59:47,743 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-15 01:59:47,744 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-data/process_queue.i
[2019-10-15 01:59:47,812 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08acfa2b/84a21815ca604738b779d0ec69649b91/FLAG08525189d
[2019-10-15 01:59:48,323 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-15 01:59:48,324 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-data/process_queue.i
[2019-10-15 01:59:48,338 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08acfa2b/84a21815ca604738b779d0ec69649b91/FLAG08525189d
[2019-10-15 01:59:48,635 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a08acfa2b/84a21815ca604738b779d0ec69649b91
[2019-10-15 01:59:48,646 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-15 01:59:48,647 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-15 01:59:48,649 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-15 01:59:48,649 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-15 01:59:48,652 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-15 01:59:48,653 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:59:48" (1/1) ...
[2019-10-15 01:59:48,656 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3389bb02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:48, skipping insertion in model container
[2019-10-15 01:59:48,656 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:59:48" (1/1) ...
[2019-10-15 01:59:48,663 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-15 01:59:48,712 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-15 01:59:49,134 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-15 01:59:49,150 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-15 01:59:49,198 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-15 01:59:49,268 INFO  L192         MainTranslator]: Completed translation
[2019-10-15 01:59:49,269 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49 WrapperNode
[2019-10-15 01:59:49,269 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-15 01:59:49,270 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-15 01:59:49,270 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-15 01:59:49,270 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-15 01:59:49,280 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49" (1/1) ...
[2019-10-15 01:59:49,280 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49" (1/1) ...
[2019-10-15 01:59:49,300 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49" (1/1) ...
[2019-10-15 01:59:49,300 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49" (1/1) ...
[2019-10-15 01:59:49,315 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49" (1/1) ...
[2019-10-15 01:59:49,320 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49" (1/1) ...
[2019-10-15 01:59:49,324 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49" (1/1) ...
[2019-10-15 01:59:49,331 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-15 01:59:49,331 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-15 01:59:49,331 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-15 01:59:49,331 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-15 01:59:49,332 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49" (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
[2019-10-15 01:59:49,393 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-15 01:59:49,393 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-15 01:59:49,393 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2019-10-15 01:59:49,393 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2019-10-15 01:59:49,393 INFO  L138     BoogieDeclarations]: Found implementation of procedure run_process
[2019-10-15 01:59:49,394 INFO  L138     BoogieDeclarations]: Found implementation of procedure append_to_queue
[2019-10-15 01:59:49,394 INFO  L138     BoogieDeclarations]: Found implementation of procedure choose_next
[2019-10-15 01:59:49,394 INFO  L138     BoogieDeclarations]: Found implementation of procedure check_queue
[2019-10-15 01:59:49,394 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-15 01:59:49,394 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-15 01:59:49,394 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-15 01:59:49,395 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2019-10-15 01:59:49,395 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2019-10-15 01:59:49,395 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2019-10-15 01:59:49,395 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2019-10-15 01:59:49,395 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2019-10-15 01:59:49,396 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2019-10-15 01:59:49,396 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2019-10-15 01:59:49,396 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2019-10-15 01:59:49,396 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2019-10-15 01:59:49,396 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2019-10-15 01:59:49,396 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2019-10-15 01:59:49,397 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2019-10-15 01:59:49,397 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2019-10-15 01:59:49,397 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2019-10-15 01:59:49,397 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2019-10-15 01:59:49,397 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2019-10-15 01:59:49,397 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2019-10-15 01:59:49,398 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2019-10-15 01:59:49,398 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2019-10-15 01:59:49,398 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2019-10-15 01:59:49,398 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2019-10-15 01:59:49,398 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2019-10-15 01:59:49,398 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2019-10-15 01:59:49,399 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2019-10-15 01:59:49,399 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2019-10-15 01:59:49,399 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2019-10-15 01:59:49,399 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2019-10-15 01:59:49,399 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2019-10-15 01:59:49,399 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2019-10-15 01:59:49,400 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2019-10-15 01:59:49,400 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2019-10-15 01:59:49,400 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2019-10-15 01:59:49,400 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2019-10-15 01:59:49,400 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2019-10-15 01:59:49,400 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2019-10-15 01:59:49,400 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2019-10-15 01:59:49,401 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2019-10-15 01:59:49,401 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2019-10-15 01:59:49,401 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2019-10-15 01:59:49,401 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2019-10-15 01:59:49,401 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2019-10-15 01:59:49,401 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2019-10-15 01:59:49,402 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2019-10-15 01:59:49,402 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2019-10-15 01:59:49,402 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2019-10-15 01:59:49,402 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2019-10-15 01:59:49,402 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2019-10-15 01:59:49,402 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2019-10-15 01:59:49,403 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2019-10-15 01:59:49,403 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2019-10-15 01:59:49,403 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2019-10-15 01:59:49,403 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2019-10-15 01:59:49,403 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2019-10-15 01:59:49,403 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2019-10-15 01:59:49,403 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2019-10-15 01:59:49,404 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2019-10-15 01:59:49,404 INFO  L130     BoogieDeclarations]: Found specification of procedure cfree
[2019-10-15 01:59:49,404 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2019-10-15 01:59:49,404 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2019-10-15 01:59:49,404 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2019-10-15 01:59:49,404 INFO  L130     BoogieDeclarations]: Found specification of procedure aligned_alloc
[2019-10-15 01:59:49,405 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2019-10-15 01:59:49,405 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2019-10-15 01:59:49,405 INFO  L130     BoogieDeclarations]: Found specification of procedure at_quick_exit
[2019-10-15 01:59:49,405 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2019-10-15 01:59:49,405 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-15 01:59:49,405 INFO  L130     BoogieDeclarations]: Found specification of procedure quick_exit
[2019-10-15 01:59:49,406 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2019-10-15 01:59:49,406 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2019-10-15 01:59:49,406 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2019-10-15 01:59:49,406 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2019-10-15 01:59:49,406 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2019-10-15 01:59:49,406 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2019-10-15 01:59:49,406 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2019-10-15 01:59:49,407 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2019-10-15 01:59:49,407 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2019-10-15 01:59:49,407 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2019-10-15 01:59:49,407 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2019-10-15 01:59:49,407 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2019-10-15 01:59:49,407 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2019-10-15 01:59:49,408 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2019-10-15 01:59:49,408 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2019-10-15 01:59:49,408 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2019-10-15 01:59:49,408 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2019-10-15 01:59:49,408 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2019-10-15 01:59:49,408 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2019-10-15 01:59:49,408 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2019-10-15 01:59:49,409 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2019-10-15 01:59:49,409 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2019-10-15 01:59:49,409 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2019-10-15 01:59:49,409 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2019-10-15 01:59:49,409 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2019-10-15 01:59:49,409 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2019-10-15 01:59:49,409 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2019-10-15 01:59:49,410 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2019-10-15 01:59:49,410 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2019-10-15 01:59:49,410 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2019-10-15 01:59:49,410 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2019-10-15 01:59:49,410 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2019-10-15 01:59:49,410 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2019-10-15 01:59:49,410 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2019-10-15 01:59:49,411 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2019-10-15 01:59:49,411 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2019-10-15 01:59:49,411 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2019-10-15 01:59:49,411 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2019-10-15 01:59:49,411 INFO  L130     BoogieDeclarations]: Found specification of procedure run_process
[2019-10-15 01:59:49,411 INFO  L130     BoogieDeclarations]: Found specification of procedure append_to_queue
[2019-10-15 01:59:49,411 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2019-10-15 01:59:49,412 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2019-10-15 01:59:49,412 INFO  L130     BoogieDeclarations]: Found specification of procedure choose_next
[2019-10-15 01:59:49,412 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2019-10-15 01:59:49,412 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2019-10-15 01:59:49,412 INFO  L130     BoogieDeclarations]: Found specification of procedure check_queue
[2019-10-15 01:59:49,412 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-15 01:59:49,412 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2019-10-15 01:59:49,413 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2019-10-15 01:59:49,413 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$
[2019-10-15 01:59:49,413 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-10-15 01:59:49,413 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-15 01:59:49,413 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-15 01:59:50,248 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-15 01:59:50,249 INFO  L284             CfgBuilder]: Removed 3 assume(true) statements.
[2019-10-15 01:59:50,250 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:59:50 BoogieIcfgContainer
[2019-10-15 01:59:50,250 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-15 01:59:50,251 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-15 01:59:50,252 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-15 01:59:50,255 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-15 01:59:50,255 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:59:48" (1/3) ...
[2019-10-15 01:59:50,256 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282f72a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:59:50, skipping insertion in model container
[2019-10-15 01:59:50,256 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:59:49" (2/3) ...
[2019-10-15 01:59:50,256 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@282f72a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:59:50, skipping insertion in model container
[2019-10-15 01:59:50,257 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:59:50" (3/3) ...
[2019-10-15 01:59:50,258 INFO  L109   eAbstractionObserver]: Analyzing ICFG process_queue.i
[2019-10-15 01:59:50,268 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-15 01:59:50,275 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-15 01:59:50,286 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-15 01:59:50,306 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-15 01:59:50,307 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-15 01:59:50,307 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-15 01:59:50,307 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-15 01:59:50,307 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-15 01:59:50,307 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-15 01:59:50,308 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-15 01:59:50,308 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-15 01:59:50,325 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states.
[2019-10-15 01:59:50,331 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2019-10-15 01:59:50,332 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:59:50,333 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 01:59:50,335 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:59:50,340 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:59:50,340 INFO  L82        PathProgramCache]: Analyzing trace with hash -1029668330, now seen corresponding path program 1 times
[2019-10-15 01:59:50,350 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:59:50,350 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295543082]
[2019-10-15 01:59:50,350 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:59:50,351 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:59:50,351 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:59:50,484 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:59:50,614 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 01:59:50,614 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295543082]
[2019-10-15 01:59:50,615 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 01:59:50,616 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-15 01:59:50,616 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846087594]
[2019-10-15 01:59:50,620 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-15 01:59:50,621 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 01:59:50,635 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-15 01:59:50,636 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2019-10-15 01:59:50,638 INFO  L87              Difference]: Start difference. First operand 35 states. Second operand 6 states.
[2019-10-15 01:59:50,816 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 01:59:50,817 INFO  L93              Difference]: Finished difference Result 77 states and 97 transitions.
[2019-10-15 01:59:50,818 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-15 01:59:50,820 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 15
[2019-10-15 01:59:50,820 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 01:59:50,836 INFO  L225             Difference]: With dead ends: 77
[2019-10-15 01:59:50,836 INFO  L226             Difference]: Without dead ends: 42
[2019-10-15 01:59:50,847 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2019-10-15 01:59:50,867 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2019-10-15 01:59:50,906 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41.
[2019-10-15 01:59:50,907 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2019-10-15 01:59:50,911 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions.
[2019-10-15 01:59:50,914 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 15
[2019-10-15 01:59:50,915 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 01:59:50,915 INFO  L462      AbstractCegarLoop]: Abstraction has 41 states and 47 transitions.
[2019-10-15 01:59:50,915 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-15 01:59:50,915 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions.
[2019-10-15 01:59:50,917 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2019-10-15 01:59:50,917 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:59:50,918 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 01:59:50,918 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:59:50,919 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:59:50,919 INFO  L82        PathProgramCache]: Analyzing trace with hash -172051464, now seen corresponding path program 1 times
[2019-10-15 01:59:50,919 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:59:50,920 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742337312]
[2019-10-15 01:59:50,920 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:59:50,920 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:59:50,920 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:59:51,030 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:59:51,326 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 01:59:51,326 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742337312]
[2019-10-15 01:59:51,327 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 01:59:51,327 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11
[2019-10-15 01:59:51,327 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072490018]
[2019-10-15 01:59:51,333 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-15 01:59:51,333 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 01:59:51,333 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-15 01:59:51,334 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110
[2019-10-15 01:59:51,334 INFO  L87              Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 11 states.
[2019-10-15 01:59:52,312 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 01:59:52,312 INFO  L93              Difference]: Finished difference Result 80 states and 103 transitions.
[2019-10-15 01:59:52,312 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-15 01:59:52,313 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 17
[2019-10-15 01:59:52,313 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 01:59:52,316 INFO  L225             Difference]: With dead ends: 80
[2019-10-15 01:59:52,316 INFO  L226             Difference]: Without dead ends: 78
[2019-10-15 01:59:52,317 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342
[2019-10-15 01:59:52,318 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2019-10-15 01:59:52,330 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56.
[2019-10-15 01:59:52,330 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2019-10-15 01:59:52,332 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions.
[2019-10-15 01:59:52,332 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 17
[2019-10-15 01:59:52,333 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 01:59:52,333 INFO  L462      AbstractCegarLoop]: Abstraction has 56 states and 68 transitions.
[2019-10-15 01:59:52,333 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-15 01:59:52,333 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions.
[2019-10-15 01:59:52,335 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2019-10-15 01:59:52,335 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:59:52,335 INFO  L380         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 01:59:52,335 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:59:52,336 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:59:52,336 INFO  L82        PathProgramCache]: Analyzing trace with hash -1685326830, now seen corresponding path program 1 times
[2019-10-15 01:59:52,336 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:59:52,336 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655325630]
[2019-10-15 01:59:52,337 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:59:52,337 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:59:52,337 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:59:52,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:59:52,669 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 01:59:52,670 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655325630]
[2019-10-15 01:59:52,670 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586585302]
[2019-10-15 01:59:52,670 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 01:59:52,797 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:59:52,800 INFO  L256         TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 58 conjunts are in the unsatisfiable core
[2019-10-15 01:59:52,808 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-15 01:59:52,924 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2019-10-15 01:59:52,940 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11
[2019-10-15 01:59:52,941 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:52,969 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:52,974 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2019-10-15 01:59:52,976 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11
[2019-10-15 01:59:52,976 INFO  L496         ElimStorePlain]: Start of recursive call 3:  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:52,997 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:53,002 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2019-10-15 01:59:53,007 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11
[2019-10-15 01:59:53,008 INFO  L496         ElimStorePlain]: Start of recursive call 4:  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:53,029 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:53,034 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2019-10-15 01:59:53,036 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11
[2019-10-15 01:59:53,037 INFO  L496         ElimStorePlain]: Start of recursive call 5:  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:53,046 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:53,047 INFO  L496         ElimStorePlain]: Start of recursive call 1: 4 dim-2 vars,  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:53,047 INFO  L221         ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:94, output treesize:26
[2019-10-15 01:59:55,121 WARN  L860   $PredicateComparison]: unable to prove that (exists ((append_to_queue_~n.base Int)) (let ((.cse1 (+ |c_append_to_queue_#in~n.offset| 8))) (and (<= |c_append_to_queue_#in~n.base| append_to_queue_~n.base) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| append_to_queue_~n.base (store (select |c_old(#memory_$Pointer$.offset)| append_to_queue_~n.base) .cse1 (select (select |c_old(#memory_$Pointer$.offset)| |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset|))))) (store .cse0 |c_append_to_queue_#in~q.base| (store (select .cse0 |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset| |c_append_to_queue_#in~n.offset|))) |c_#memory_$Pointer$.offset|) (= (let ((.cse2 (store |c_old(#memory_$Pointer$.base)| append_to_queue_~n.base (store (select |c_old(#memory_$Pointer$.base)| append_to_queue_~n.base) .cse1 (select (select |c_old(#memory_$Pointer$.base)| |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset|))))) (store .cse2 |c_append_to_queue_#in~q.base| (store (select .cse2 |c_append_to_queue_#in~q.base|) |c_append_to_queue_#in~q.offset| append_to_queue_~n.base))) |c_#memory_$Pointer$.base|)))) is different from true
[2019-10-15 01:59:55,153 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2019-10-15 01:59:55,155 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18
[2019-10-15 01:59:55,156 INFO  L496         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:55,174 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:55,180 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2019-10-15 01:59:55,183 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 18
[2019-10-15 01:59:55,183 INFO  L496         ElimStorePlain]: Start of recursive call 3:  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:55,197 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:55,199 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars,  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:55,199 INFO  L221         ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:93, output treesize:42
[2019-10-15 01:59:55,432 INFO  L172   IndexEqualityManager]: detected equality via solver
[2019-10-15 01:59:55,435 INFO  L341             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:55,435 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 38
[2019-10-15 01:59:55,437 INFO  L496         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2019-10-15 01:59:55,448 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:55,452 INFO  L189   IndexEqualityManager]: detected not equals via solver
[2019-10-15 01:59:55,457 INFO  L341             Elim1Store]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:55,457 INFO  L375             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23
[2019-10-15 01:59:55,458 INFO  L496         ElimStorePlain]: Start of recursive call 3:  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:55,464 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:55,465 INFO  L496         ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars,  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:55,465 INFO  L221         ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:7
[2019-10-15 01:59:55,468 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 01:59:55,468 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-15 01:59:55,738 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-15 01:59:56,073 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-15 01:59:56,090 WARN  L138   XnfTransformerHelper]: expecting exponential blowup for input size 16
[2019-10-15 01:59:56,925 WARN  L191               SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 110
[2019-10-15 01:59:56,929 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-15 01:59:56,945 INFO  L392         ElimStorePlain]: Different costs {0=[|v_#memory_$Pointer$.base_41|, |v_#memory_$Pointer$.offset_41|], 6=[|v_#memory_$Pointer$.base_51|, |v_#memory_$Pointer$.offset_51|]}
[2019-10-15 01:59:56,959 INFO  L496         ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2019-10-15 01:59:56,970 INFO  L496         ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2019-10-15 01:59:57,059 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:57,065 INFO  L496         ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2019-10-15 01:59:57,072 INFO  L496         ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2019-10-15 01:59:57,169 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:57,177 INFO  L496         ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2019-10-15 01:59:57,192 INFO  L496         ElimStorePlain]: Start of recursive call 7:  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:57,237 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:57,242 INFO  L496         ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2019-10-15 01:59:57,247 INFO  L496         ElimStorePlain]: Start of recursive call 9:  End of recursive call:  and 1 xjuncts.
[2019-10-15 01:59:57,276 INFO  L567         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2019-10-15 01:59:57,277 INFO  L496         ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 4 dim-2 vars,  End of recursive call: 8 dim-0 vars,  and 2 xjuncts.
[2019-10-15 01:59:57,277 INFO  L221         ElimStorePlain]: Needed 9 recursive calls to eliminate 7 variables, input treesize:225, output treesize:229
[2019-10-15 01:59:57,787 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 01:59:57,787 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1416036312]
[2019-10-15 01:59:57,811 INFO  L162        IcfgInterpreter]: Started Sifa with 19 locations of interest
[2019-10-15 01:59:57,811 INFO  L169        IcfgInterpreter]: Building call graph
[2019-10-15 01:59:57,817 INFO  L174        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-10-15 01:59:57,825 INFO  L179        IcfgInterpreter]: Starting interpretation
[2019-10-15 01:59:57,825 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-10-15 01:59:57,914 INFO  L199        IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs
[2019-10-15 01:59:58,727 INFO  L199        IcfgInterpreter]: Interpreting procedure check_queue with input of size 45 for LOIs
[2019-10-15 01:59:58,789 INFO  L199        IcfgInterpreter]: Interpreting procedure append_to_queue with input of size 63 for LOIs
[2019-10-15 01:59:58,820 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs
[2019-10-15 01:59:58,825 INFO  L183        IcfgInterpreter]: Interpretation finished
[2019-10-15 01:59:59,427 WARN  L191               SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51
[2019-10-15 01:59:59,933 WARN  L191               SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56
[2019-10-15 02:00:00,414 WARN  L191               SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60
[2019-10-15 02:00:00,689 WARN  L191               SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 70
[2019-10-15 02:00:03,001 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences.
[2019-10-15 02:00:03,001 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11, 15] total 40
[2019-10-15 02:00:03,001 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748832852]
[2019-10-15 02:00:03,003 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 40 states
[2019-10-15 02:00:03,003 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 02:00:03,003 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants.
[2019-10-15 02:00:03,004 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1352, Unknown=3, NotChecked=74, Total=1560
[2019-10-15 02:00:03,004 INFO  L87              Difference]: Start difference. First operand 56 states and 68 transitions. Second operand 40 states.
[2019-10-15 02:00:03,489 WARN  L191               SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51
[2019-10-15 02:00:03,843 WARN  L191               SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 64
[2019-10-15 02:00:04,343 WARN  L191               SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 106
[2019-10-15 02:00:09,104 WARN  L191               SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80
[2019-10-15 02:00:10,111 WARN  L191               SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 88
[2019-10-15 02:00:12,760 WARN  L191               SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 85
[2019-10-15 02:00:19,762 WARN  L191               SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 106 DAG size of output: 63
[2019-10-15 02:00:21,186 WARN  L191               SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 58
[2019-10-15 02:00:23,561 WARN  L191               SmtUtils]: Spent 758.00 ms on a formula simplification that was a NOOP. DAG size: 66
[2019-10-15 02:00:26,607 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 02:00:26,608 INFO  L93              Difference]: Finished difference Result 153 states and 193 transitions.
[2019-10-15 02:00:26,608 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2019-10-15 02:00:26,608 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states. Word has length 20
[2019-10-15 02:00:26,609 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 02:00:26,611 INFO  L225             Difference]: With dead ends: 153
[2019-10-15 02:00:26,611 INFO  L226             Difference]: Without dead ends: 112
[2019-10-15 02:00:26,615 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=458, Invalid=3322, Unknown=6, NotChecked=120, Total=3906
[2019-10-15 02:00:26,616 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2019-10-15 02:00:26,646 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91.
[2019-10-15 02:00:26,647 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2019-10-15 02:00:26,649 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 113 transitions.
[2019-10-15 02:00:26,649 INFO  L78                 Accepts]: Start accepts. Automaton has 91 states and 113 transitions. Word has length 20
[2019-10-15 02:00:26,649 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 02:00:26,649 INFO  L462      AbstractCegarLoop]: Abstraction has 91 states and 113 transitions.
[2019-10-15 02:00:26,649 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 40 states.
[2019-10-15 02:00:26,649 INFO  L276                IsEmpty]: Start isEmpty. Operand 91 states and 113 transitions.
[2019-10-15 02:00:26,651 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2019-10-15 02:00:26,651 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 02:00:26,651 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 02:00:26,868 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 02:00:26,869 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 02:00:26,869 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 02:00:26,869 INFO  L82        PathProgramCache]: Analyzing trace with hash 1235894599, now seen corresponding path program 1 times
[2019-10-15 02:00:26,869 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 02:00:26,869 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705809277]
[2019-10-15 02:00:26,869 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 02:00:26,869 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 02:00:26,870 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 02:00:26,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 02:00:26,962 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-15 02:00:26,962 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705809277]
[2019-10-15 02:00:26,962 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200503214]
[2019-10-15 02:00:26,962 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 02:00:27,098 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 02:00:27,100 INFO  L256         TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 28 conjunts are in the unsatisfiable core
[2019-10-15 02:00:27,103 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-15 02:00:27,208 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-10-15 02:00:27,208 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-15 02:00:27,411 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-15 02:00:27,411 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences.
[2019-10-15 02:00:27,412 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [8, 8] total 13
[2019-10-15 02:00:27,412 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601684742]
[2019-10-15 02:00:27,412 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-10-15 02:00:27,413 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 02:00:27,413 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-10-15 02:00:27,413 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156
[2019-10-15 02:00:27,413 INFO  L87              Difference]: Start difference. First operand 91 states and 113 transitions. Second operand 9 states.
[2019-10-15 02:00:27,586 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 02:00:27,586 INFO  L93              Difference]: Finished difference Result 183 states and 235 transitions.
[2019-10-15 02:00:27,587 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-10-15 02:00:27,587 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 32
[2019-10-15 02:00:27,587 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 02:00:27,589 INFO  L225             Difference]: With dead ends: 183
[2019-10-15 02:00:27,589 INFO  L226             Difference]: Without dead ends: 108
[2019-10-15 02:00:27,590 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240
[2019-10-15 02:00:27,591 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 108 states.
[2019-10-15 02:00:27,615 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100.
[2019-10-15 02:00:27,616 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 100 states.
[2019-10-15 02:00:27,617 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions.
[2019-10-15 02:00:27,617 INFO  L78                 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 32
[2019-10-15 02:00:27,617 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 02:00:27,618 INFO  L462      AbstractCegarLoop]: Abstraction has 100 states and 124 transitions.
[2019-10-15 02:00:27,618 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-10-15 02:00:27,618 INFO  L276                IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions.
[2019-10-15 02:00:27,619 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2019-10-15 02:00:27,619 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 02:00:27,619 INFO  L380         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 02:00:27,829 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 02:00:27,829 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [check_queueErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 02:00:27,830 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 02:00:27,830 INFO  L82        PathProgramCache]: Analyzing trace with hash 277187053, now seen corresponding path program 2 times
[2019-10-15 02:00:27,831 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 02:00:27,831 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817912844]
[2019-10-15 02:00:27,832 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 02:00:27,832 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 02:00:27,832 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 02:00:27,893 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 02:00:28,460 WARN  L191               SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50
[2019-10-15 02:00:28,723 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 02:00:28,724 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817912844]
[2019-10-15 02:00:28,724 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265561789]
[2019-10-15 02:00:28,724 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 02:00:28,856 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2019-10-15 02:00:28,856 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-10-15 02:00:28,858 INFO  L256         TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 93 conjunts are in the unsatisfiable core
[2019-10-15 02:00:28,863 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-15 02:00:30,403 WARN  L191               SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 37
[2019-10-15 02:00:33,222 WARN  L191               SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 42
[2019-10-15 02:00:33,743 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-15 02:00:33,743 INFO  L321         TraceCheckSpWp]: Computing backward predicates...