/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092b.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 21:07:45,901 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 21:07:45,906 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 21:07:45,926 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 21:07:45,926 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 21:07:45,928 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 21:07:45,930 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 21:07:45,940 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 21:07:45,945 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 21:07:45,948 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 21:07:45,949 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 21:07:45,950 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 21:07:45,951 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 21:07:45,952 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 21:07:45,955 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 21:07:45,956 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 21:07:45,957 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 21:07:45,958 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 21:07:45,960 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 21:07:45,964 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 21:07:45,969 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 21:07:45,973 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 21:07:45,974 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 21:07:45,974 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 21:07:45,977 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 21:07:45,977 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 21:07:45,977 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 21:07:45,980 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 21:07:45,980 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 21:07:45,981 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 21:07:45,981 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 21:07:45,982 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 21:07:45,983 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 21:07:45,984 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 21:07:45,985 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 21:07:45,985 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 21:07:45,986 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-07-20 21:07:45,986 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 21:07:45,988 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 21:07:45,989 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 21:07:46,023 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 21:07:46,023 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 21:07:46,027 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 21:07:46,028 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 21:07:46,028 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 21:07:46,028 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 21:07:46,028 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 21:07:46,029 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 21:07:46,029 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 21:07:46,029 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 21:07:46,029 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 21:07:46,029 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 21:07:46,029 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 21:07:46,030 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 21:07:46,030 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 21:07:46,030 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 21:07:46,030 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 21:07:46,030 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 21:07:46,031 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 21:07:46,031 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 21:07:46,031 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 21:07:46,031 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 21:07:46,031 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 21:07:46,032 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 21:07:46,032 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 21:07:46,032 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 21:07:46,032 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:07:46,032 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 21:07:46,033 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 21:07:46,033 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 21:07:46,301 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 21:07:46,323 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 21:07:46,326 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 21:07:46,330 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 21:07:46,331 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 21:07:46,332 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092b.c
[2020-07-20 21:07:46,414 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa68ebe55/2e544b981a7e48cfad20d33e088ad8d4/FLAG700922fd4
[2020-07-20 21:07:46,883 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 21:07:46,884 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1092b.c
[2020-07-20 21:07:46,893 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa68ebe55/2e544b981a7e48cfad20d33e088ad8d4/FLAG700922fd4
[2020-07-20 21:07:47,239 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aa68ebe55/2e544b981a7e48cfad20d33e088ad8d4
[2020-07-20 21:07:47,247 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 21:07:47,249 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 21:07:47,250 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 21:07:47,250 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 21:07:47,254 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 21:07:47,255 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:47" (1/1) ...
[2020-07-20 21:07:47,257 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76573965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47, skipping insertion in model container
[2020-07-20 21:07:47,258 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:07:47" (1/1) ...
[2020-07-20 21:07:47,265 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 21:07:47,286 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 21:07:47,472 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:07:47,476 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 21:07:47,502 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:07:47,616 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 21:07:47,617 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47 WrapperNode
[2020-07-20 21:07:47,617 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 21:07:47,618 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 21:07:47,618 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 21:07:47,618 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 21:07:47,632 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ...
[2020-07-20 21:07:47,632 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ...
[2020-07-20 21:07:47,643 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ...
[2020-07-20 21:07:47,643 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ...
[2020-07-20 21:07:47,654 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ...
[2020-07-20 21:07:47,661 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ...
[2020-07-20 21:07:47,663 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ...
[2020-07-20 21:07:47,666 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 21:07:47,666 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 21:07:47,666 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 21:07:47,666 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 21:07:47,667 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 21:07:47,727 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 21:07:47,727 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 21:07:47,727 INFO  L138     BoogieDeclarations]: Found implementation of procedure ceil_float
[2020-07-20 21:07:47,728 INFO  L138     BoogieDeclarations]: Found implementation of procedure __signbit_float
[2020-07-20 21:07:47,728 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 21:07:47,728 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 21:07:47,728 INFO  L130     BoogieDeclarations]: Found specification of procedure ceil_float
[2020-07-20 21:07:47,728 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-20 21:07:47,728 INFO  L130     BoogieDeclarations]: Found specification of procedure write~real
[2020-07-20 21:07:47,729 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-20 21:07:47,729 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-20 21:07:47,729 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-20 21:07:47,729 INFO  L130     BoogieDeclarations]: Found specification of procedure read~real
[2020-07-20 21:07:47,729 INFO  L130     BoogieDeclarations]: Found specification of procedure __signbit_float
[2020-07-20 21:07:47,729 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 21:07:47,730 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 21:07:47,730 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 21:07:48,076 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 21:07:48,077 INFO  L295             CfgBuilder]: Removed 6 assume(true) statements.
[2020-07-20 21:07:48,081 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:48 BoogieIcfgContainer
[2020-07-20 21:07:48,082 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 21:07:48,083 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 21:07:48,083 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 21:07:48,086 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 21:07:48,087 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:07:47" (1/3) ...
[2020-07-20 21:07:48,088 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e02c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:48, skipping insertion in model container
[2020-07-20 21:07:48,088 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:07:47" (2/3) ...
[2020-07-20 21:07:48,088 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54e02c8b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:07:48, skipping insertion in model container
[2020-07-20 21:07:48,089 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:07:48" (3/3) ...
[2020-07-20 21:07:48,090 INFO  L109   eAbstractionObserver]: Analyzing ICFG float_req_bl_1092b.c
[2020-07-20 21:07:48,101 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 21:07:48,110 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 21:07:48,125 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 21:07:48,150 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 21:07:48,150 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 21:07:48,150 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 21:07:48,150 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 21:07:48,151 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 21:07:48,151 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 21:07:48,151 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 21:07:48,151 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 21:07:48,178 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states.
[2020-07-20 21:07:48,184 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-20 21:07:48,184 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:07:48,185 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:07:48,186 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:07:48,192 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:07:48,192 INFO  L82        PathProgramCache]: Analyzing trace with hash 263185431, now seen corresponding path program 1 times
[2020-07-20 21:07:48,200 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:07:48,200 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901504668]
[2020-07-20 21:07:48,201 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:07:48,320 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 21:07:48,321 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:07:48,324 INFO  L263         TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 21:07:48,330 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:07:48,355 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 21:07:48,356 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:07:48,357 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901504668]
[2020-07-20 21:07:48,358 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:07:48,358 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 21:07:48,360 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167031894]
[2020-07-20 21:07:48,365 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 21:07:48,366 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:07:48,379 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 21:07:48,380 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 21:07:48,382 INFO  L87              Difference]: Start difference. First operand 43 states. Second operand 2 states.
[2020-07-20 21:07:48,408 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:07:48,408 INFO  L93              Difference]: Finished difference Result 78 states and 111 transitions.
[2020-07-20 21:07:48,408 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-20 21:07:48,409 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 18
[2020-07-20 21:07:48,410 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:07:48,419 INFO  L225             Difference]: With dead ends: 78
[2020-07-20 21:07:48,420 INFO  L226             Difference]: Without dead ends: 39
[2020-07-20 21:07:48,423 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 21:07:48,439 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 39 states.
[2020-07-20 21:07:48,461 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39.
[2020-07-20 21:07:48,463 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 39 states.
[2020-07-20 21:07:48,464 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions.
[2020-07-20 21:07:48,466 INFO  L78                 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18
[2020-07-20 21:07:48,467 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:07:48,467 INFO  L479      AbstractCegarLoop]: Abstraction has 39 states and 48 transitions.
[2020-07-20 21:07:48,467 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 21:07:48,467 INFO  L276                IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions.
[2020-07-20 21:07:48,468 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-20 21:07:48,469 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:07:48,469 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:07:48,682 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:07:48,683 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:07:48,683 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:07:48,684 INFO  L82        PathProgramCache]: Analyzing trace with hash 1491196875, now seen corresponding path program 1 times
[2020-07-20 21:07:48,684 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:07:48,685 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409673132]
[2020-07-20 21:07:48,685 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:07:48,749 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 21:07:48,749 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 21:07:48,750 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.