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/array-crafted/zero_sum_const_m5.c


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


This is Ultimate 0.1.24-13a467a-m
[2019-10-15 01:31:02,434 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-15 01:31:02,437 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-10-15 01:31:02,457 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-10-15 01:31:02,458 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-10-15 01:31:02,460 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-10-15 01:31:02,462 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2019-10-15 01:31:02,471 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2019-10-15 01:31:02,476 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2019-10-15 01:31:02,479 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2019-10-15 01:31:02,481 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2019-10-15 01:31:02,482 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2019-10-15 01:31:02,482 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2019-10-15 01:31:02,484 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2019-10-15 01:31:02,486 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-10-15 01:31:02,488 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-10-15 01:31:02,489 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-10-15 01:31:02,490 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-10-15 01:31:02,491 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-10-15 01:31:02,493 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-10-15 01:31:02,495 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-10-15 01:31:02,496 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-10-15 01:31:02,499 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-10-15 01:31:02,501 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-10-15 01:31:02,503 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2019-10-15 01:31:02,503 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2019-10-15 01:31:02,503 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2019-10-15 01:31:02,505 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2019-10-15 01:31:02,506 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2019-10-15 01:31:02,508 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2019-10-15 01:31:02,514 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2019-10-15 01:31:02,515 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-10-15 01:31:02,517 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2019-10-15 01:31:02,518 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 01:31:02,547 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-15 01:31:02,548 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-15 01:31:02,550 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-15 01:31:02,550 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-15 01:31:02,551 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-15 01:31:02,551 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-15 01:31:02,551 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-15 01:31:02,551 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-15 01:31:02,552 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-15 01:31:02,552 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-15 01:31:02,553 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-15 01:31:02,553 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-15 01:31:02,553 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-15 01:31:02,554 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-15 01:31:02,554 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-15 01:31:02,554 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-15 01:31:02,554 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-15 01:31:02,554 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-15 01:31:02,554 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-15 01:31:02,555 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-15 01:31:02,555 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-15 01:31:02,555 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-15 01:31:02,555 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-15 01:31:02,555 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-15 01:31:02,556 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-15 01:31:02,556 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-15 01:31:02,556 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-15 01:31:02,556 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-15 01:31:02,556 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 01:31:02,854 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-15 01:31:02,867 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-15 01:31:02,870 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-15 01:31:02,872 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-15 01:31:02,872 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-15 01:31:02,873 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c
[2019-10-15 01:31:02,942 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44af10b2/c47a368c7520431990699b88ec6ab33f/FLAG9b8f5d7b0
[2019-10-15 01:31:03,430 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-15 01:31:03,431 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const_m5.c
[2019-10-15 01:31:03,441 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44af10b2/c47a368c7520431990699b88ec6ab33f/FLAG9b8f5d7b0
[2019-10-15 01:31:03,785 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e44af10b2/c47a368c7520431990699b88ec6ab33f
[2019-10-15 01:31:03,795 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-15 01:31:03,796 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-15 01:31:03,797 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-15 01:31:03,798 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-15 01:31:03,801 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-15 01:31:03,802 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:03" (1/1) ...
[2019-10-15 01:31:03,805 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b5c0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:03, skipping insertion in model container
[2019-10-15 01:31:03,806 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:31:03" (1/1) ...
[2019-10-15 01:31:03,813 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-15 01:31:03,834 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-15 01:31:04,113 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-15 01:31:04,135 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-15 01:31:04,319 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-15 01:31:04,342 INFO  L192         MainTranslator]: Completed translation
[2019-10-15 01:31:04,343 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04 WrapperNode
[2019-10-15 01:31:04,343 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-15 01:31:04,344 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-15 01:31:04,344 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-15 01:31:04,344 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-15 01:31:04,358 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ...
[2019-10-15 01:31:04,358 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ...
[2019-10-15 01:31:04,381 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ...
[2019-10-15 01:31:04,382 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ...
[2019-10-15 01:31:04,400 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ...
[2019-10-15 01:31:04,413 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ...
[2019-10-15 01:31:04,416 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ...
[2019-10-15 01:31:04,419 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-15 01:31:04,421 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-15 01:31:04,421 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-15 01:31:04,421 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-15 01:31:04,426 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-15 01:31:04,485 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-15 01:31:04,485 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-15 01:31:04,485 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2019-10-15 01:31:04,485 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-15 01:31:04,485 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-15 01:31:04,486 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assume
[2019-10-15 01:31:04,486 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2019-10-15 01:31:04,486 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long
[2019-10-15 01:31:04,486 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2019-10-15 01:31:04,486 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-15 01:31:04,487 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2019-10-15 01:31:04,487 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2019-10-15 01:31:04,487 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2019-10-15 01:31:04,487 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-15 01:31:04,487 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-15 01:31:04,487 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-10-15 01:31:05,075 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-15 01:31:05,075 INFO  L284             CfgBuilder]: Removed 11 assume(true) statements.
[2019-10-15 01:31:05,077 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:05 BoogieIcfgContainer
[2019-10-15 01:31:05,077 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-15 01:31:05,079 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-15 01:31:05,079 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-15 01:31:05,084 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-15 01:31:05,084 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:31:03" (1/3) ...
[2019-10-15 01:31:05,085 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636b8c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:05, skipping insertion in model container
[2019-10-15 01:31:05,085 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:31:04" (2/3) ...
[2019-10-15 01:31:05,087 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@636b8c0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:31:05, skipping insertion in model container
[2019-10-15 01:31:05,087 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:31:05" (3/3) ...
[2019-10-15 01:31:05,089 INFO  L109   eAbstractionObserver]: Analyzing ICFG zero_sum_const_m5.c
[2019-10-15 01:31:05,100 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-15 01:31:05,111 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-15 01:31:05,124 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-15 01:31:05,154 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-15 01:31:05,154 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-15 01:31:05,154 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-15 01:31:05,155 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-15 01:31:05,155 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-15 01:31:05,155 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-15 01:31:05,155 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-15 01:31:05,156 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-15 01:31:05,172 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states.
[2019-10-15 01:31:05,178 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2019-10-15 01:31:05,178 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:31:05,179 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 01:31:05,181 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:31:05,185 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:31:05,186 INFO  L82        PathProgramCache]: Analyzing trace with hash 1883974854, now seen corresponding path program 1 times
[2019-10-15 01:31:05,193 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:31:05,193 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997025018]
[2019-10-15 01:31:05,193 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:05,194 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:05,194 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:31:05,307 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:05,435 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 01:31:05,436 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997025018]
[2019-10-15 01:31:05,437 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 01:31:05,437 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2019-10-15 01:31:05,438 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660376523]
[2019-10-15 01:31:05,443 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-15 01:31:05,443 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 01:31:05,458 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-15 01:31:05,459 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2019-10-15 01:31:05,461 INFO  L87              Difference]: Start difference. First operand 28 states. Second operand 5 states.
[2019-10-15 01:31:05,601 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 01:31:05,601 INFO  L93              Difference]: Finished difference Result 53 states and 76 transitions.
[2019-10-15 01:31:05,602 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-10-15 01:31:05,603 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 21
[2019-10-15 01:31:05,604 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 01:31:05,614 INFO  L225             Difference]: With dead ends: 53
[2019-10-15 01:31:05,614 INFO  L226             Difference]: Without dead ends: 32
[2019-10-15 01:31:05,618 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-15 01:31:05,637 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2019-10-15 01:31:05,658 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32.
[2019-10-15 01:31:05,660 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2019-10-15 01:31:05,661 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 51 transitions.
[2019-10-15 01:31:05,663 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 51 transitions. Word has length 21
[2019-10-15 01:31:05,664 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 01:31:05,664 INFO  L462      AbstractCegarLoop]: Abstraction has 32 states and 51 transitions.
[2019-10-15 01:31:05,664 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-15 01:31:05,664 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 51 transitions.
[2019-10-15 01:31:05,665 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2019-10-15 01:31:05,665 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:31:05,665 INFO  L380         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]
[2019-10-15 01:31:05,666 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:31:05,666 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:31:05,666 INFO  L82        PathProgramCache]: Analyzing trace with hash 75212444, now seen corresponding path program 1 times
[2019-10-15 01:31:05,667 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:31:05,667 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666405419]
[2019-10-15 01:31:05,667 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:05,667 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:05,668 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:31:05,701 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:05,738 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-15 01:31:05,739 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666405419]
[2019-10-15 01:31:05,739 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 01:31:05,739 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2019-10-15 01:31:05,740 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914419943]
[2019-10-15 01:31:05,741 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-15 01:31:05,742 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 01:31:05,742 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-15 01:31:05,743 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-15 01:31:05,743 INFO  L87              Difference]: Start difference. First operand 32 states and 51 transitions. Second operand 3 states.
[2019-10-15 01:31:05,827 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 01:31:05,827 INFO  L93              Difference]: Finished difference Result 58 states and 96 transitions.
[2019-10-15 01:31:05,828 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-15 01:31:05,828 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2019-10-15 01:31:05,829 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 01:31:05,830 INFO  L225             Difference]: With dead ends: 58
[2019-10-15 01:31:05,830 INFO  L226             Difference]: Without dead ends: 33
[2019-10-15 01:31:05,831 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2019-10-15 01:31:05,832 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2019-10-15 01:31:05,838 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2019-10-15 01:31:05,838 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2019-10-15 01:31:05,840 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 52 transitions.
[2019-10-15 01:31:05,840 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 52 transitions. Word has length 22
[2019-10-15 01:31:05,840 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 01:31:05,841 INFO  L462      AbstractCegarLoop]: Abstraction has 33 states and 52 transitions.
[2019-10-15 01:31:05,841 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-15 01:31:05,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 52 transitions.
[2019-10-15 01:31:05,842 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2019-10-15 01:31:05,842 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:31:05,842 INFO  L380         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]
[2019-10-15 01:31:05,843 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:31:05,843 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:31:05,843 INFO  L82        PathProgramCache]: Analyzing trace with hash -1456530685, now seen corresponding path program 1 times
[2019-10-15 01:31:05,844 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:31:05,844 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649201121]
[2019-10-15 01:31:05,844 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:05,844 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:05,845 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:31:05,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:05,903 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2019-10-15 01:31:05,903 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649201121]
[2019-10-15 01:31:05,903 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-15 01:31:05,904 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-15 01:31:05,904 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520798098]
[2019-10-15 01:31:05,905 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-10-15 01:31:05,905 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 01:31:05,905 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-10-15 01:31:05,906 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-15 01:31:05,906 INFO  L87              Difference]: Start difference. First operand 33 states and 52 transitions. Second operand 4 states.
[2019-10-15 01:31:06,041 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 01:31:06,042 INFO  L93              Difference]: Finished difference Result 56 states and 92 transitions.
[2019-10-15 01:31:06,042 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-10-15 01:31:06,042 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 23
[2019-10-15 01:31:06,043 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 01:31:06,043 INFO  L225             Difference]: With dead ends: 56
[2019-10-15 01:31:06,044 INFO  L226             Difference]: Without dead ends: 33
[2019-10-15 01:31:06,044 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2019-10-15 01:31:06,045 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2019-10-15 01:31:06,051 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2019-10-15 01:31:06,051 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2019-10-15 01:31:06,052 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions.
[2019-10-15 01:31:06,052 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 23
[2019-10-15 01:31:06,053 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 01:31:06,053 INFO  L462      AbstractCegarLoop]: Abstraction has 33 states and 43 transitions.
[2019-10-15 01:31:06,053 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-10-15 01:31:06,053 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions.
[2019-10-15 01:31:06,054 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2019-10-15 01:31:06,054 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:31:06,054 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 01:31:06,055 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:31:06,055 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:31:06,055 INFO  L82        PathProgramCache]: Analyzing trace with hash 2063924474, now seen corresponding path program 1 times
[2019-10-15 01:31:06,055 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:31:06,056 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244356855]
[2019-10-15 01:31:06,056 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:06,056 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:06,056 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:31:06,097 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:06,140 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2019-10-15 01:31:06,140 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244356855]
[2019-10-15 01:31:06,140 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537619612]
[2019-10-15 01:31:06,141 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 01:31:06,211 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:06,214 INFO  L256         TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-15 01:31:06,221 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-15 01:31:06,280 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2019-10-15 01:31:06,280 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-15 01:31:06,322 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2019-10-15 01:31:06,323 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1885600163]
[2019-10-15 01:31:06,383 INFO  L162        IcfgInterpreter]: Started Sifa with 22 locations of interest
[2019-10-15 01:31:06,383 INFO  L169        IcfgInterpreter]: Building call graph
[2019-10-15 01:31:06,399 INFO  L174        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-10-15 01:31:06,411 INFO  L179        IcfgInterpreter]: Starting interpretation
[2019-10-15 01:31:06,412 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-10-15 01:31:06,594 INFO  L199        IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs
[2019-10-15 01:31:08,878 INFO  L199        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs
[2019-10-15 01:31:08,921 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs
[2019-10-15 01:31:08,927 INFO  L183        IcfgInterpreter]: Interpretation finished
[2019-10-15 01:31:09,410 WARN  L191               SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26
[2019-10-15 01:31:09,819 WARN  L191               SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 21
[2019-10-15 01:31:09,822 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences.
[2019-10-15 01:31:09,823 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4, 11] total 19
[2019-10-15 01:31:09,823 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873434905]
[2019-10-15 01:31:09,824 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 19 states
[2019-10-15 01:31:09,825 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 01:31:09,825 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2019-10-15 01:31:09,826 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342
[2019-10-15 01:31:09,827 INFO  L87              Difference]: Start difference. First operand 33 states and 43 transitions. Second operand 19 states.
[2019-10-15 01:31:10,886 WARN  L191               SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34
[2019-10-15 01:31:10,958 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 01:31:10,959 INFO  L93              Difference]: Finished difference Result 69 states and 99 transitions.
[2019-10-15 01:31:10,959 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2019-10-15 01:31:10,959 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 32
[2019-10-15 01:31:10,959 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 01:31:10,960 INFO  L225             Difference]: With dead ends: 69
[2019-10-15 01:31:10,960 INFO  L226             Difference]: Without dead ends: 44
[2019-10-15 01:31:10,963 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870
[2019-10-15 01:31:10,964 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2019-10-15 01:31:10,977 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44.
[2019-10-15 01:31:10,977 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 44 states.
[2019-10-15 01:31:10,980 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions.
[2019-10-15 01:31:10,980 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 32
[2019-10-15 01:31:10,980 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 01:31:10,981 INFO  L462      AbstractCegarLoop]: Abstraction has 44 states and 54 transitions.
[2019-10-15 01:31:10,981 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2019-10-15 01:31:10,981 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions.
[2019-10-15 01:31:10,984 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 44
[2019-10-15 01:31:10,984 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:31:10,984 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 01:31:11,188 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 01:31:11,191 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:31:11,191 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:31:11,191 INFO  L82        PathProgramCache]: Analyzing trace with hash 981880454, now seen corresponding path program 2 times
[2019-10-15 01:31:11,191 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:31:11,192 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707619027]
[2019-10-15 01:31:11,192 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:11,192 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:11,192 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:31:11,418 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:13,306 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 01:31:13,306 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707619027]
[2019-10-15 01:31:13,307 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032510799]
[2019-10-15 01:31:13,307 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 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 01:31:13,395 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2019-10-15 01:31:13,395 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-10-15 01:31:13,398 INFO  L256         TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 92 conjunts are in the unsatisfiable core
[2019-10-15 01:31:13,403 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-15 01:31:14,687 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-15 01:31:14,687 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-15 01:31:16,792 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-10-15 01:31:16,792 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [261750578]
[2019-10-15 01:31:16,794 INFO  L162        IcfgInterpreter]: Started Sifa with 22 locations of interest
[2019-10-15 01:31:16,795 INFO  L169        IcfgInterpreter]: Building call graph
[2019-10-15 01:31:16,795 INFO  L174        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-10-15 01:31:16,796 INFO  L179        IcfgInterpreter]: Starting interpretation
[2019-10-15 01:31:16,796 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-10-15 01:31:16,833 INFO  L199        IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs
[2019-10-15 01:31:18,120 INFO  L199        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs
[2019-10-15 01:31:18,153 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs
[2019-10-15 01:31:18,160 INFO  L183        IcfgInterpreter]: Interpretation finished
[2019-10-15 01:31:19,956 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences.
[2019-10-15 01:31:19,956 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 30, 11] total 88
[2019-10-15 01:31:19,957 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398449674]
[2019-10-15 01:31:19,959 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 88 states
[2019-10-15 01:31:19,959 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 01:31:19,959 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants.
[2019-10-15 01:31:19,962 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=7373, Unknown=0, NotChecked=0, Total=7656
[2019-10-15 01:31:19,962 INFO  L87              Difference]: Start difference. First operand 44 states and 54 transitions. Second operand 88 states.
[2019-10-15 01:31:26,194 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 01:31:26,194 INFO  L93              Difference]: Finished difference Result 77 states and 96 transitions.
[2019-10-15 01:31:26,195 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. 
[2019-10-15 01:31:26,195 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states. Word has length 43
[2019-10-15 01:31:26,196 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 01:31:26,197 INFO  L225             Difference]: With dead ends: 77
[2019-10-15 01:31:26,197 INFO  L226             Difference]: Without dead ends: 72
[2019-10-15 01:31:26,203 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 66 SyntacticMatches, 13 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3158 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=514, Invalid=13528, Unknown=0, NotChecked=0, Total=14042
[2019-10-15 01:31:26,204 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2019-10-15 01:31:26,215 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70.
[2019-10-15 01:31:26,215 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2019-10-15 01:31:26,216 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions.
[2019-10-15 01:31:26,217 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 43
[2019-10-15 01:31:26,217 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 01:31:26,217 INFO  L462      AbstractCegarLoop]: Abstraction has 70 states and 89 transitions.
[2019-10-15 01:31:26,217 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 88 states.
[2019-10-15 01:31:26,217 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions.
[2019-10-15 01:31:26,218 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2019-10-15 01:31:26,219 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:31:26,219 INFO  L380         BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 01:31:26,422 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 01:31:26,423 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:31:26,424 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:31:26,424 INFO  L82        PathProgramCache]: Analyzing trace with hash -1460027300, now seen corresponding path program 3 times
[2019-10-15 01:31:26,425 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:31:26,425 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870550024]
[2019-10-15 01:31:26,425 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:26,426 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:26,426 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:31:26,443 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:26,499 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2019-10-15 01:31:26,499 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870550024]
[2019-10-15 01:31:26,499 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767235597]
[2019-10-15 01:31:26,500 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
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 01:31:26,610 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2019-10-15 01:31:26,611 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-10-15 01:31:26,612 INFO  L256         TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core
[2019-10-15 01:31:26,615 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-15 01:31:26,658 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2019-10-15 01:31:26,658 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-15 01:31:26,699 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2019-10-15 01:31:26,699 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399662232]
[2019-10-15 01:31:26,701 INFO  L162        IcfgInterpreter]: Started Sifa with 22 locations of interest
[2019-10-15 01:31:26,701 INFO  L169        IcfgInterpreter]: Building call graph
[2019-10-15 01:31:26,702 INFO  L174        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-10-15 01:31:26,702 INFO  L179        IcfgInterpreter]: Starting interpretation
[2019-10-15 01:31:26,702 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-10-15 01:31:26,734 INFO  L199        IcfgInterpreter]: Interpreting procedure main with input of size 30 for LOIs
[2019-10-15 01:31:27,712 INFO  L199        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs
[2019-10-15 01:31:27,741 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs
[2019-10-15 01:31:27,745 INFO  L183        IcfgInterpreter]: Interpretation finished
[2019-10-15 01:31:28,191 WARN  L191               SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 26
[2019-10-15 01:31:28,554 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences.
[2019-10-15 01:31:28,554 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 25
[2019-10-15 01:31:28,554 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420972235]
[2019-10-15 01:31:28,556 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 25 states
[2019-10-15 01:31:28,556 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 01:31:28,556 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2019-10-15 01:31:28,557 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600
[2019-10-15 01:31:28,557 INFO  L87              Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 25 states.
[2019-10-15 01:31:29,874 WARN  L191               SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34
[2019-10-15 01:31:30,198 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 01:31:30,198 INFO  L93              Difference]: Finished difference Result 148 states and 194 transitions.
[2019-10-15 01:31:30,204 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2019-10-15 01:31:30,204 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states. Word has length 44
[2019-10-15 01:31:30,205 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 01:31:30,209 INFO  L225             Difference]: With dead ends: 148
[2019-10-15 01:31:30,209 INFO  L226             Difference]: Without dead ends: 85
[2019-10-15 01:31:30,211 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806
[2019-10-15 01:31:30,212 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2019-10-15 01:31:30,226 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78.
[2019-10-15 01:31:30,226 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 78 states.
[2019-10-15 01:31:30,228 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 96 transitions.
[2019-10-15 01:31:30,228 INFO  L78                 Accepts]: Start accepts. Automaton has 78 states and 96 transitions. Word has length 44
[2019-10-15 01:31:30,230 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 01:31:30,230 INFO  L462      AbstractCegarLoop]: Abstraction has 78 states and 96 transitions.
[2019-10-15 01:31:30,231 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 25 states.
[2019-10-15 01:31:30,231 INFO  L276                IsEmpty]: Start isEmpty. Operand 78 states and 96 transitions.
[2019-10-15 01:31:30,234 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2019-10-15 01:31:30,234 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:31:30,235 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 01:31:30,435 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 01:31:30,436 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:31:30,436 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:31:30,437 INFO  L82        PathProgramCache]: Analyzing trace with hash -1604823922, now seen corresponding path program 4 times
[2019-10-15 01:31:30,437 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:31:30,437 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547239343]
[2019-10-15 01:31:30,438 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:30,438 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:30,438 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:31:30,456 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:30,506 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2019-10-15 01:31:30,506 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547239343]
[2019-10-15 01:31:30,506 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521250341]
[2019-10-15 01:31:30,507 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 01:31:30,624 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:30,626 INFO  L256         TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core
[2019-10-15 01:31:30,628 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-15 01:31:30,673 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2019-10-15 01:31:30,673 INFO  L321         TraceCheckSpWp]: Computing backward predicates...
[2019-10-15 01:31:30,737 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2019-10-15 01:31:30,738 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958387284]
[2019-10-15 01:31:30,740 INFO  L162        IcfgInterpreter]: Started Sifa with 22 locations of interest
[2019-10-15 01:31:30,740 INFO  L169        IcfgInterpreter]: Building call graph
[2019-10-15 01:31:30,741 INFO  L174        IcfgInterpreter]: Initial procedures are [ULTIMATE.start]
[2019-10-15 01:31:30,741 INFO  L179        IcfgInterpreter]: Starting interpretation
[2019-10-15 01:31:30,741 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs
[2019-10-15 01:31:30,762 INFO  L199        IcfgInterpreter]: Interpreting procedure main with input of size 32 for LOIs
[2019-10-15 01:31:31,656 INFO  L199        IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 23 for LOIs
[2019-10-15 01:31:31,684 INFO  L199        IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 16 for LOIs
[2019-10-15 01:31:31,688 INFO  L183        IcfgInterpreter]: Interpretation finished
[2019-10-15 01:31:32,465 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences.
[2019-10-15 01:31:32,465 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 11] total 25
[2019-10-15 01:31:32,466 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719247916]
[2019-10-15 01:31:32,467 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 25 states
[2019-10-15 01:31:32,467 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN
[2019-10-15 01:31:32,468 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants.
[2019-10-15 01:31:32,468 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600
[2019-10-15 01:31:32,468 INFO  L87              Difference]: Start difference. First operand 78 states and 96 transitions. Second operand 25 states.
[2019-10-15 01:31:33,960 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-15 01:31:33,960 INFO  L93              Difference]: Finished difference Result 84 states and 102 transitions.
[2019-10-15 01:31:33,961 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2019-10-15 01:31:33,961 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states. Word has length 45
[2019-10-15 01:31:33,961 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-15 01:31:33,962 INFO  L225             Difference]: With dead ends: 84
[2019-10-15 01:31:33,962 INFO  L226             Difference]: Without dead ends: 55
[2019-10-15 01:31:33,964 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 114 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482
[2019-10-15 01:31:33,964 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2019-10-15 01:31:33,971 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55.
[2019-10-15 01:31:33,971 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2019-10-15 01:31:33,972 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions.
[2019-10-15 01:31:33,972 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 45
[2019-10-15 01:31:33,972 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-15 01:31:33,972 INFO  L462      AbstractCegarLoop]: Abstraction has 55 states and 65 transitions.
[2019-10-15 01:31:33,973 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 25 states.
[2019-10-15 01:31:33,973 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions.
[2019-10-15 01:31:33,974 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2019-10-15 01:31:33,974 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-15 01:31:33,974 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-15 01:31:34,175 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 01:31:34,178 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-15 01:31:34,178 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-15 01:31:34,179 INFO  L82        PathProgramCache]: Analyzing trace with hash -1820325702, now seen corresponding path program 5 times
[2019-10-15 01:31:34,179 INFO  L157   tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN
[2019-10-15 01:31:34,179 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353899337]
[2019-10-15 01:31:34,180 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:34,180 INFO  L116   rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-15 01:31:34,180 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-15 01:31:34,303 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-15 01:31:35,470 WARN  L191               SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52
[2019-10-15 01:31:36,000 WARN  L191               SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53
[2019-10-15 01:31:36,137 WARN  L191               SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 41
[2019-10-15 01:31:36,464 WARN  L191               SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 42
[2019-10-15 01:31:36,622 WARN  L191               SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54
[2019-10-15 01:31:36,805 WARN  L191               SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40
[2019-10-15 01:31:36,967 WARN  L191               SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40
[2019-10-15 01:31:37,168 WARN  L191               SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47
[2019-10-15 01:31:37,344 WARN  L191               SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49
[2019-10-15 01:31:37,506 WARN  L191               SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44
[2019-10-15 01:31:37,675 WARN  L191               SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 40
[2019-10-15 01:31:37,879 WARN  L191               SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43
[2019-10-15 01:31:38,071 WARN  L191               SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54
[2019-10-15 01:31:38,239 WARN  L191               SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 42
[2019-10-15 01:31:38,400 WARN  L191               SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39
[2019-10-15 01:31:38,630 WARN  L191               SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 56
[2019-10-15 01:31:38,836 WARN  L191               SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 50
[2019-10-15 01:31:39,023 WARN  L191               SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41
[2019-10-15 01:31:39,194 WARN  L191               SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40
[2019-10-15 01:31:39,415 WARN  L191               SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57
[2019-10-15 01:31:39,619 WARN  L191               SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50
[2019-10-15 01:31:39,786 WARN  L191               SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42
[2019-10-15 01:31:39,977 WARN  L191               SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41
[2019-10-15 01:31:40,338 WARN  L191               SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45
[2019-10-15 01:31:41,096 INFO  L134       CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-15 01:31:41,097 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353899337]
[2019-10-15 01:31:41,097 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647863466]
[2019-10-15 01:31:41,097 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-15 01:31:41,238 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2019-10-15 01:31:41,238 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2019-10-15 01:31:41,242 WARN  L254         TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 146 conjunts are in the unsatisfiable core
[2019-10-15 01:31:41,247 INFO  L279         TraceCheckSpWp]: Computing forward predicates...