/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 NUM_FUNCTIONS --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/loop-invgen/sendmail-close-angle.i


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 14:30:19,854 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 14:30:19,856 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 14:30:19,873 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 14:30:19,873 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 14:30:19,875 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 14:30:19,877 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 14:30:19,882 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 14:30:19,886 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 14:30:19,886 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 14:30:19,887 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 14:30:19,889 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 14:30:19,889 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 14:30:19,893 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 14:30:19,894 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 14:30:19,896 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 14:30:19,898 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 14:30:19,900 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 14:30:19,901 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 14:30:19,905 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 14:30:19,906 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 14:30:19,911 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 14:30:19,912 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 14:30:19,913 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 14:30:19,916 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 14:30:19,916 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 14:30:19,916 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 14:30:19,919 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 14:30:19,919 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 14:30:19,921 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 14:30:19,921 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 14:30:19,922 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 14:30:19,923 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 14:30:19,925 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 14:30:19,927 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 14:30:19,927 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 14:30:19,927 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 14:30:19,928 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 14:30:19,928 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 14:30:19,929 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 14:30:19,930 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 14:30:19,931 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 14:30:19,951 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 14:30:19,951 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 14:30:19,952 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 14:30:19,953 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 14:30:19,953 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 14:30:19,953 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 14:30:19,953 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 14:30:19,954 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 14:30:19,954 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 14:30:19,954 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 14:30:19,955 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 14:30:19,955 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 14:30:19,955 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 14:30:19,956 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 14:30:19,956 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 14:30:19,956 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 14:30:19,956 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 14:30:19,957 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 14:30:19,957 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 14:30:19,957 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 14:30:19,957 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 14:30:19,957 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 14:30:19,958 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 14:30:19,958 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 14:30:19,958 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 14:30:19,958 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 14:30:19,958 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:19,959 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 14:30:19,959 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 14:30:19,959 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 -> NUM_FUNCTIONS
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 14:30:20,237 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 14:30:20,256 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 14:30:20,259 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 14:30:20,260 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 14:30:20,261 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 14:30:20,261 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i
[2020-07-20 14:30:20,328 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047ec901c/868a06bd23f3402dbd23ae8278ec524d/FLAGb56589c22
[2020-07-20 14:30:20,765 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 14:30:20,766 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/sendmail-close-angle.i
[2020-07-20 14:30:20,772 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047ec901c/868a06bd23f3402dbd23ae8278ec524d/FLAGb56589c22
[2020-07-20 14:30:21,193 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/047ec901c/868a06bd23f3402dbd23ae8278ec524d
[2020-07-20 14:30:21,203 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 14:30:21,206 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 14:30:21,207 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 14:30:21,207 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 14:30:21,210 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 14:30:21,211 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:30:21" (1/1) ...
[2020-07-20 14:30:21,214 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@419ad10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21, skipping insertion in model container
[2020-07-20 14:30:21,214 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:30:21" (1/1) ...
[2020-07-20 14:30:21,221 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 14:30:21,244 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 14:30:21,404 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 14:30:21,408 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 14:30:21,426 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 14:30:21,440 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 14:30:21,441 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21 WrapperNode
[2020-07-20 14:30:21,441 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 14:30:21,442 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 14:30:21,442 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 14:30:21,442 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 14:30:21,454 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ...
[2020-07-20 14:30:21,454 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ...
[2020-07-20 14:30:21,459 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ...
[2020-07-20 14:30:21,460 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ...
[2020-07-20 14:30:21,464 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ...
[2020-07-20 14:30:21,554 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ...
[2020-07-20 14:30:21,555 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (1/1) ...
[2020-07-20 14:30:21,557 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 14:30:21,558 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 14:30:21,558 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 14:30:21,558 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 14:30:21,559 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (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 14:30:21,617 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 14:30:21,617 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 14:30:21,617 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 14:30:21,618 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 14:30:21,618 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 14:30:21,618 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 14:30:21,618 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 14:30:21,618 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 14:30:21,618 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 14:30:21,618 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 14:30:21,619 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 14:30:21,619 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 14:30:21,619 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 14:30:21,860 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 14:30:21,860 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 14:30:21,864 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:30:21 BoogieIcfgContainer
[2020-07-20 14:30:21,865 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 14:30:21,866 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 14:30:21,867 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 14:30:21,869 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 14:30:21,870 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:30:21" (1/3) ...
[2020-07-20 14:30:21,871 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8c0f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:30:21, skipping insertion in model container
[2020-07-20 14:30:21,871 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:30:21" (2/3) ...
[2020-07-20 14:30:21,871 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8c0f25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:30:21, skipping insertion in model container
[2020-07-20 14:30:21,872 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:30:21" (3/3) ...
[2020-07-20 14:30:21,873 INFO  L109   eAbstractionObserver]: Analyzing ICFG sendmail-close-angle.i
[2020-07-20 14:30:21,885 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 14:30:21,893 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 14:30:21,908 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 14:30:21,931 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 14:30:21,931 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 14:30:21,931 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 14:30:21,932 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 14:30:21,932 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 14:30:21,932 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 14:30:21,932 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 14:30:21,932 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 14:30:21,952 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states.
[2020-07-20 14:30:21,957 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-20 14:30:21,958 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:21,958 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:21,959 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:21,965 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:21,966 INFO  L82        PathProgramCache]: Analyzing trace with hash 160437665, now seen corresponding path program 1 times
[2020-07-20 14:30:21,974 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:21,975 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93472367]
[2020-07-20 14:30:21,975 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 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 14:30:22,040 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 14:30:22,041 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:22,043 INFO  L263         TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 14:30:22,047 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:22,064 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 14:30:22,064 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:30:22,065 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93472367]
[2020-07-20 14:30:22,066 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:30:22,066 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 14:30:22,067 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026854073]
[2020-07-20 14:30:22,071 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 14:30:22,071 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:22,083 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 14:30:22,083 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 14:30:22,085 INFO  L87              Difference]: Start difference. First operand 35 states. Second operand 2 states.
[2020-07-20 14:30:22,113 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:22,114 INFO  L93              Difference]: Finished difference Result 61 states and 92 transitions.
[2020-07-20 14:30:22,114 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-20 14:30:22,115 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 14
[2020-07-20 14:30:22,116 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:22,125 INFO  L225             Difference]: With dead ends: 61
[2020-07-20 14:30:22,125 INFO  L226             Difference]: Without dead ends: 29
[2020-07-20 14:30:22,129 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 14:30:22,146 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29 states.
[2020-07-20 14:30:22,168 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29.
[2020-07-20 14:30:22,169 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 29 states.
[2020-07-20 14:30:22,171 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions.
[2020-07-20 14:30:22,173 INFO  L78                 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 14
[2020-07-20 14:30:22,173 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:22,173 INFO  L479      AbstractCegarLoop]: Abstraction has 29 states and 37 transitions.
[2020-07-20 14:30:22,173 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 14:30:22,174 INFO  L276                IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions.
[2020-07-20 14:30:22,174 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-20 14:30:22,174 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:22,175 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:22,376 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:22,376 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:22,377 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:22,378 INFO  L82        PathProgramCache]: Analyzing trace with hash 89152719, now seen corresponding path program 1 times
[2020-07-20 14:30:22,378 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:22,379 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854263814]
[2020-07-20 14:30:22,380 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 14:30:22,416 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:22,416 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:22,417 INFO  L263         TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 14:30:22,419 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:22,452 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:22,478 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 14:30:22,478 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:30:22,481 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854263814]
[2020-07-20 14:30:22,482 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:30:22,482 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 14:30:22,482 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033530366]
[2020-07-20 14:30:22,484 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 14:30:22,484 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:22,487 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 14:30:22,487 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 14:30:22,487 INFO  L87              Difference]: Start difference. First operand 29 states and 37 transitions. Second operand 5 states.
[2020-07-20 14:30:22,585 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:22,586 INFO  L93              Difference]: Finished difference Result 35 states and 42 transitions.
[2020-07-20 14:30:22,586 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-20 14:30:22,587 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 15
[2020-07-20 14:30:22,587 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:22,588 INFO  L225             Difference]: With dead ends: 35
[2020-07-20 14:30:22,588 INFO  L226             Difference]: Without dead ends: 33
[2020-07-20 14:30:22,590 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:30:22,590 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2020-07-20 14:30:22,599 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2020-07-20 14:30:22,600 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2020-07-20 14:30:22,601 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions.
[2020-07-20 14:30:22,602 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 15
[2020-07-20 14:30:22,602 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:22,602 INFO  L479      AbstractCegarLoop]: Abstraction has 33 states and 40 transitions.
[2020-07-20 14:30:22,602 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 14:30:22,603 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions.
[2020-07-20 14:30:22,604 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-20 14:30:22,604 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:22,604 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:22,819 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:22,820 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:22,820 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:22,821 INFO  L82        PathProgramCache]: Analyzing trace with hash 1105875316, now seen corresponding path program 1 times
[2020-07-20 14:30:22,822 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:22,822 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362290366]
[2020-07-20 14:30:22,823 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:22,857 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:22,857 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:22,858 INFO  L263         TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-20 14:30:22,860 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:22,886 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:22,888 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:22,916 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 14:30:22,917 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:30:22,917 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362290366]
[2020-07-20 14:30:22,917 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:30:22,918 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-20 14:30:22,918 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859612016]
[2020-07-20 14:30:22,918 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 14:30:22,919 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:22,919 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 14:30:22,919 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:30:22,919 INFO  L87              Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 6 states.
[2020-07-20 14:30:23,032 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:23,033 INFO  L93              Difference]: Finished difference Result 48 states and 60 transitions.
[2020-07-20 14:30:23,033 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-07-20 14:30:23,034 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 20
[2020-07-20 14:30:23,034 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:23,035 INFO  L225             Difference]: With dead ends: 48
[2020-07-20 14:30:23,035 INFO  L226             Difference]: Without dead ends: 46
[2020-07-20 14:30:23,036 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-07-20 14:30:23,037 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 46 states.
[2020-07-20 14:30:23,046 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44.
[2020-07-20 14:30:23,047 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 44 states.
[2020-07-20 14:30:23,048 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions.
[2020-07-20 14:30:23,048 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 20
[2020-07-20 14:30:23,049 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:23,049 INFO  L479      AbstractCegarLoop]: Abstraction has 44 states and 56 transitions.
[2020-07-20 14:30:23,049 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 14:30:23,049 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions.
[2020-07-20 14:30:23,050 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-07-20 14:30:23,051 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:23,051 INFO  L422         BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:23,265 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:23,268 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:23,268 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:23,269 INFO  L82        PathProgramCache]: Analyzing trace with hash 726428669, now seen corresponding path program 1 times
[2020-07-20 14:30:23,269 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:23,269 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546987512]
[2020-07-20 14:30:23,270 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:23,307 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:23,307 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:23,308 INFO  L263         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-20 14:30:23,310 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:23,328 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:23,362 INFO  L134       CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-07-20 14:30:23,363 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:30:23,363 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546987512]
[2020-07-20 14:30:23,363 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:30:23,364 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-20 14:30:23,364 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384995155]
[2020-07-20 14:30:23,364 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 14:30:23,365 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:23,365 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 14:30:23,365 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:30:23,365 INFO  L87              Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 6 states.
[2020-07-20 14:30:23,439 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:23,439 INFO  L93              Difference]: Finished difference Result 55 states and 67 transitions.
[2020-07-20 14:30:23,440 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-07-20 14:30:23,440 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 28
[2020-07-20 14:30:23,440 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:23,441 INFO  L225             Difference]: With dead ends: 55
[2020-07-20 14:30:23,441 INFO  L226             Difference]: Without dead ends: 53
[2020-07-20 14:30:23,442 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-07-20 14:30:23,443 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2020-07-20 14:30:23,451 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48.
[2020-07-20 14:30:23,452 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2020-07-20 14:30:23,453 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions.
[2020-07-20 14:30:23,453 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 28
[2020-07-20 14:30:23,453 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:23,453 INFO  L479      AbstractCegarLoop]: Abstraction has 48 states and 59 transitions.
[2020-07-20 14:30:23,454 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 14:30:23,454 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions.
[2020-07-20 14:30:23,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-07-20 14:30:23,455 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:23,455 INFO  L422         BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:23,669 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:23,670 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:23,671 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:23,671 INFO  L82        PathProgramCache]: Analyzing trace with hash 239914697, now seen corresponding path program 1 times
[2020-07-20 14:30:23,671 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:23,672 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134342005]
[2020-07-20 14:30:23,672 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:23,710 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:23,711 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:23,711 INFO  L263         TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core
[2020-07-20 14:30:23,714 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:23,751 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:23,753 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:23,767 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-07-20 14:30:23,768 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:30:23,768 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134342005]
[2020-07-20 14:30:23,768 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:30:23,768 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-07-20 14:30:23,769 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419989018]
[2020-07-20 14:30:23,769 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 14:30:23,769 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:23,770 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 14:30:23,770 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-07-20 14:30:23,770 INFO  L87              Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 7 states.
[2020-07-20 14:30:23,921 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:23,921 INFO  L93              Difference]: Finished difference Result 70 states and 89 transitions.
[2020-07-20 14:30:23,922 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 14:30:23,922 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 31
[2020-07-20 14:30:23,923 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:23,924 INFO  L225             Difference]: With dead ends: 70
[2020-07-20 14:30:23,924 INFO  L226             Difference]: Without dead ends: 63
[2020-07-20 14:30:23,925 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2020-07-20 14:30:23,926 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63 states.
[2020-07-20 14:30:23,934 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61.
[2020-07-20 14:30:23,935 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 61 states.
[2020-07-20 14:30:23,936 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 75 transitions.
[2020-07-20 14:30:23,936 INFO  L78                 Accepts]: Start accepts. Automaton has 61 states and 75 transitions. Word has length 31
[2020-07-20 14:30:23,936 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:23,937 INFO  L479      AbstractCegarLoop]: Abstraction has 61 states and 75 transitions.
[2020-07-20 14:30:23,937 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 14:30:23,937 INFO  L276                IsEmpty]: Start isEmpty. Operand 61 states and 75 transitions.
[2020-07-20 14:30:23,938 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-07-20 14:30:23,938 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:23,938 INFO  L422         BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:24,146 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:24,148 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:24,148 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:24,148 INFO  L82        PathProgramCache]: Analyzing trace with hash 1617190790, now seen corresponding path program 1 times
[2020-07-20 14:30:24,149 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:24,149 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002074006]
[2020-07-20 14:30:24,150 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:24,179 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:24,179 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:24,180 INFO  L263         TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 14:30:24,182 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:24,223 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:24,230 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:24,250 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-07-20 14:30:24,250 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:30:24,251 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002074006]
[2020-07-20 14:30:24,251 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:30:24,251 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-07-20 14:30:24,252 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376796778]
[2020-07-20 14:30:24,252 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-07-20 14:30:24,252 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:24,252 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-07-20 14:30:24,253 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-07-20 14:30:24,253 INFO  L87              Difference]: Start difference. First operand 61 states and 75 transitions. Second operand 8 states.
[2020-07-20 14:30:24,401 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:24,401 INFO  L93              Difference]: Finished difference Result 72 states and 86 transitions.
[2020-07-20 14:30:24,401 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 14:30:24,401 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 33
[2020-07-20 14:30:24,402 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:24,403 INFO  L225             Difference]: With dead ends: 72
[2020-07-20 14:30:24,403 INFO  L226             Difference]: Without dead ends: 70
[2020-07-20 14:30:24,404 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132
[2020-07-20 14:30:24,405 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 70 states.
[2020-07-20 14:30:24,420 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65.
[2020-07-20 14:30:24,420 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 65 states.
[2020-07-20 14:30:24,422 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions.
[2020-07-20 14:30:24,422 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 33
[2020-07-20 14:30:24,422 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:24,422 INFO  L479      AbstractCegarLoop]: Abstraction has 65 states and 78 transitions.
[2020-07-20 14:30:24,422 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-07-20 14:30:24,423 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions.
[2020-07-20 14:30:24,424 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-20 14:30:24,425 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:24,425 INFO  L422         BasicCegarLoop]: trace histogram [8, 7, 7, 2, 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]
[2020-07-20 14:30:24,638 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:24,639 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:24,639 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:24,639 INFO  L82        PathProgramCache]: Analyzing trace with hash 260855770, now seen corresponding path program 1 times
[2020-07-20 14:30:24,639 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:24,640 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001396290]
[2020-07-20 14:30:24,640 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:24,677 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:24,678 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:24,679 INFO  L263         TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-20 14:30:24,682 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:24,795 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 14:30:24,817 INFO  L134       CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2020-07-20 14:30:24,817 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:30:24,833 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:24,945 INFO  L134       CoverageAnalysis]: Checked inductivity of 100 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2020-07-20 14:30:24,946 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001396290]
[2020-07-20 14:30:24,946 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:30:24,946 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13
[2020-07-20 14:30:24,947 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116276428]
[2020-07-20 14:30:24,947 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-20 14:30:24,947 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:24,948 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-20 14:30:24,948 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156
[2020-07-20 14:30:24,948 INFO  L87              Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 13 states.
[2020-07-20 14:30:25,413 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:25,414 INFO  L93              Difference]: Finished difference Result 110 states and 146 transitions.
[2020-07-20 14:30:25,414 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-07-20 14:30:25,414 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 56
[2020-07-20 14:30:25,415 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:25,418 INFO  L225             Difference]: With dead ends: 110
[2020-07-20 14:30:25,418 INFO  L226             Difference]: Without dead ends: 95
[2020-07-20 14:30:25,419 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462
[2020-07-20 14:30:25,419 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-07-20 14:30:25,432 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 87.
[2020-07-20 14:30:25,432 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-07-20 14:30:25,433 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions.
[2020-07-20 14:30:25,434 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 56
[2020-07-20 14:30:25,434 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:25,434 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 107 transitions.
[2020-07-20 14:30:25,434 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-20 14:30:25,435 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions.
[2020-07-20 14:30:25,436 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-07-20 14:30:25,436 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:25,436 INFO  L422         BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:25,652 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:25,652 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:25,653 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:25,653 INFO  L82        PathProgramCache]: Analyzing trace with hash 266725463, now seen corresponding path program 1 times
[2020-07-20 14:30:25,654 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:25,655 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894825736]
[2020-07-20 14:30:25,655 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:25,697 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:25,697 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:25,698 INFO  L263         TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 14:30:25,707 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:25,754 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:25,755 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:25,771 INFO  L134       CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2020-07-20 14:30:25,772 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:30:25,781 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:25,854 INFO  L134       CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2020-07-20 14:30:25,855 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894825736]
[2020-07-20 14:30:25,855 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:30:25,855 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12
[2020-07-20 14:30:25,856 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880542769]
[2020-07-20 14:30:25,857 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 14:30:25,862 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:25,862 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 14:30:25,863 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132
[2020-07-20 14:30:25,863 INFO  L87              Difference]: Start difference. First operand 87 states and 107 transitions. Second operand 12 states.
[2020-07-20 14:30:26,050 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:26,050 INFO  L93              Difference]: Finished difference Result 93 states and 112 transitions.
[2020-07-20 14:30:26,051 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 14:30:26,051 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 58
[2020-07-20 14:30:26,052 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:26,056 INFO  L225             Difference]: With dead ends: 93
[2020-07-20 14:30:26,056 INFO  L226             Difference]: Without dead ends: 91
[2020-07-20 14:30:26,058 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272
[2020-07-20 14:30:26,059 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2020-07-20 14:30:26,080 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91.
[2020-07-20 14:30:26,080 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2020-07-20 14:30:26,082 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 110 transitions.
[2020-07-20 14:30:26,082 INFO  L78                 Accepts]: Start accepts. Automaton has 91 states and 110 transitions. Word has length 58
[2020-07-20 14:30:26,082 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:26,082 INFO  L479      AbstractCegarLoop]: Abstraction has 91 states and 110 transitions.
[2020-07-20 14:30:26,083 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 14:30:26,083 INFO  L276                IsEmpty]: Start isEmpty. Operand 91 states and 110 transitions.
[2020-07-20 14:30:26,084 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 84
[2020-07-20 14:30:26,084 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:26,089 INFO  L422         BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:26,302 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:26,303 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:26,304 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:26,304 INFO  L82        PathProgramCache]: Analyzing trace with hash 437927078, now seen corresponding path program 2 times
[2020-07-20 14:30:26,304 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:26,305 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383060074]
[2020-07-20 14:30:26,305 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:26,349 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:26,350 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:26,351 INFO  L263         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-07-20 14:30:26,354 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:26,453 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:26,456 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:26,481 INFO  L134       CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2020-07-20 14:30:26,482 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:30:26,503 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:26,631 INFO  L134       CoverageAnalysis]: Checked inductivity of 269 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked.
[2020-07-20 14:30:26,631 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383060074]
[2020-07-20 14:30:26,631 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:30:26,631 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17
[2020-07-20 14:30:26,632 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14618079]
[2020-07-20 14:30:26,632 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-07-20 14:30:26,633 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:26,633 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-07-20 14:30:26,633 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272
[2020-07-20 14:30:26,633 INFO  L87              Difference]: Start difference. First operand 91 states and 110 transitions. Second operand 17 states.
[2020-07-20 14:30:27,053 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:27,053 INFO  L93              Difference]: Finished difference Result 112 states and 134 transitions.
[2020-07-20 14:30:27,054 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-07-20 14:30:27,054 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 83
[2020-07-20 14:30:27,055 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:27,056 INFO  L225             Difference]: With dead ends: 112
[2020-07-20 14:30:27,056 INFO  L226             Difference]: Without dead ends: 110
[2020-07-20 14:30:27,057 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 147 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650
[2020-07-20 14:30:27,057 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2020-07-20 14:30:27,080 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99.
[2020-07-20 14:30:27,080 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 99 states.
[2020-07-20 14:30:27,084 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions.
[2020-07-20 14:30:27,084 INFO  L78                 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 83
[2020-07-20 14:30:27,085 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:27,085 INFO  L479      AbstractCegarLoop]: Abstraction has 99 states and 116 transitions.
[2020-07-20 14:30:27,085 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-07-20 14:30:27,085 INFO  L276                IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions.
[2020-07-20 14:30:27,091 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 107
[2020-07-20 14:30:27,093 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:27,093 INFO  L422         BasicCegarLoop]: trace histogram [16, 15, 15, 4, 3, 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]
[2020-07-20 14:30:27,306 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:27,307 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:27,307 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:27,307 INFO  L82        PathProgramCache]: Analyzing trace with hash 314554042, now seen corresponding path program 2 times
[2020-07-20 14:30:27,307 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:27,308 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745532511]
[2020-07-20 14:30:27,308 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:27,362 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:27,362 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:27,363 INFO  L263         TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-07-20 14:30:27,376 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:27,531 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 14:30:27,559 INFO  L134       CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked.
[2020-07-20 14:30:27,560 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:30:27,571 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:27,649 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:27,654 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:27,713 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:27,714 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:27,715 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:27,716 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:27,717 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:27,717 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:27,718 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:27,719 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:27,720 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:27,727 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:27,728 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:27,728 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:27,729 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:27,730 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:27,731 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:27,835 INFO  L134       CoverageAnalysis]: Checked inductivity of 483 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked.
[2020-07-20 14:30:27,836 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745532511]
[2020-07-20 14:30:27,836 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:30:27,836 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21
[2020-07-20 14:30:27,836 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331333251]
[2020-07-20 14:30:27,837 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-07-20 14:30:27,837 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:27,837 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-07-20 14:30:27,838 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420
[2020-07-20 14:30:27,838 INFO  L87              Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 21 states.
[2020-07-20 14:30:28,823 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:28,823 INFO  L93              Difference]: Finished difference Result 171 states and 229 transitions.
[2020-07-20 14:30:28,823 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-07-20 14:30:28,824 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 106
[2020-07-20 14:30:28,824 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:28,826 INFO  L225             Difference]: With dead ends: 171
[2020-07-20 14:30:28,826 INFO  L226             Difference]: Without dead ends: 147
[2020-07-20 14:30:28,828 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 189 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190
[2020-07-20 14:30:28,828 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 147 states.
[2020-07-20 14:30:28,842 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 139.
[2020-07-20 14:30:28,842 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 139 states.
[2020-07-20 14:30:28,843 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 171 transitions.
[2020-07-20 14:30:28,844 INFO  L78                 Accepts]: Start accepts. Automaton has 139 states and 171 transitions. Word has length 106
[2020-07-20 14:30:28,844 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:28,844 INFO  L479      AbstractCegarLoop]: Abstraction has 139 states and 171 transitions.
[2020-07-20 14:30:28,844 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-07-20 14:30:28,844 INFO  L276                IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions.
[2020-07-20 14:30:28,846 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 109
[2020-07-20 14:30:28,846 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:28,846 INFO  L422         BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:29,071 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:29,072 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:29,072 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:29,072 INFO  L82        PathProgramCache]: Analyzing trace with hash 331157303, now seen corresponding path program 3 times
[2020-07-20 14:30:29,073 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:29,073 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284984863]
[2020-07-20 14:30:29,073 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:29,114 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:29,114 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:29,115 INFO  L263         TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-07-20 14:30:29,118 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:29,263 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:29,264 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:29,309 INFO  L134       CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked.
[2020-07-20 14:30:29,310 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:30:29,331 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:29,453 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:29,458 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:29,500 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:29,508 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:29,565 INFO  L134       CoverageAnalysis]: Checked inductivity of 504 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked.
[2020-07-20 14:30:29,566 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284984863]
[2020-07-20 14:30:29,566 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:30:29,566 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23
[2020-07-20 14:30:29,566 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730417863]
[2020-07-20 14:30:29,568 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-07-20 14:30:29,568 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:29,568 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-07-20 14:30:29,569 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506
[2020-07-20 14:30:29,569 INFO  L87              Difference]: Start difference. First operand 139 states and 171 transitions. Second operand 23 states.
[2020-07-20 14:30:30,225 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:30,228 INFO  L93              Difference]: Finished difference Result 154 states and 188 transitions.
[2020-07-20 14:30:30,228 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-07-20 14:30:30,228 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 108
[2020-07-20 14:30:30,229 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:30,230 INFO  L225             Difference]: With dead ends: 154
[2020-07-20 14:30:30,230 INFO  L226             Difference]: Without dead ends: 152
[2020-07-20 14:30:30,234 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=275, Invalid=985, Unknown=0, NotChecked=0, Total=1260
[2020-07-20 14:30:30,235 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 152 states.
[2020-07-20 14:30:30,249 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147.
[2020-07-20 14:30:30,249 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 147 states.
[2020-07-20 14:30:30,250 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 177 transitions.
[2020-07-20 14:30:30,251 INFO  L78                 Accepts]: Start accepts. Automaton has 147 states and 177 transitions. Word has length 108
[2020-07-20 14:30:30,253 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:30,254 INFO  L479      AbstractCegarLoop]: Abstraction has 147 states and 177 transitions.
[2020-07-20 14:30:30,254 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-07-20 14:30:30,254 INFO  L276                IsEmpty]: Start isEmpty. Operand 147 states and 177 transitions.
[2020-07-20 14:30:30,256 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 159
[2020-07-20 14:30:30,256 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:30,257 INFO  L422         BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:30,469 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:30,470 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:30,470 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:30,471 INFO  L82        PathProgramCache]: Analyzing trace with hash 335068695, now seen corresponding path program 4 times
[2020-07-20 14:30:30,471 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:30,471 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378483115]
[2020-07-20 14:30:30,471 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:30,537 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:30,537 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:30,539 INFO  L263         TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 26 conjunts are in the unsatisfiable core
[2020-07-20 14:30:30,546 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:30,885 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:30,886 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:30,999 INFO  L134       CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked.
[2020-07-20 14:30:30,999 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:30:31,035 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,181 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,185 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,249 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,252 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,297 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts
[2020-07-20 14:30:31,301 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts
[2020-07-20 14:30:31,373 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,375 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term
[2020-07-20 14:30:31,375 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:31,379 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,380 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term
[2020-07-20 14:30:31,380 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:31,422 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,423 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term
[2020-07-20 14:30:31,423 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts
[2020-07-20 14:30:31,431 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,432 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term
[2020-07-20 14:30:31,432 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts
[2020-07-20 14:30:31,514 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts
[2020-07-20 14:30:31,514 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term
[2020-07-20 14:30:31,515 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts
[2020-07-20 14:30:31,519 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts
[2020-07-20 14:30:31,639 INFO  L134       CoverageAnalysis]: Checked inductivity of 1193 backedges. 46 proven. 135 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked.
[2020-07-20 14:30:31,640 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378483115]
[2020-07-20 14:30:31,640 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:30:31,640 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35
[2020-07-20 14:30:31,640 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852023699]
[2020-07-20 14:30:31,641 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 35 states
[2020-07-20 14:30:31,641 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:31,641 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants.
[2020-07-20 14:30:31,642 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190
[2020-07-20 14:30:31,642 INFO  L87              Difference]: Start difference. First operand 147 states and 177 transitions. Second operand 35 states.
[2020-07-20 14:30:33,977 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:33,978 INFO  L93              Difference]: Finished difference Result 202 states and 257 transitions.
[2020-07-20 14:30:33,978 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. 
[2020-07-20 14:30:33,978 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states. Word has length 158
[2020-07-20 14:30:33,979 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:33,980 INFO  L225             Difference]: With dead ends: 202
[2020-07-20 14:30:33,981 INFO  L226             Difference]: Without dead ends: 200
[2020-07-20 14:30:33,983 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 279 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=725, Invalid=3181, Unknown=0, NotChecked=0, Total=3906
[2020-07-20 14:30:33,983 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 200 states.
[2020-07-20 14:30:34,005 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 168.
[2020-07-20 14:30:34,005 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 168 states.
[2020-07-20 14:30:34,008 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 204 transitions.
[2020-07-20 14:30:34,008 INFO  L78                 Accepts]: Start accepts. Automaton has 168 states and 204 transitions. Word has length 158
[2020-07-20 14:30:34,009 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:34,009 INFO  L479      AbstractCegarLoop]: Abstraction has 168 states and 204 transitions.
[2020-07-20 14:30:34,009 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 35 states.
[2020-07-20 14:30:34,009 INFO  L276                IsEmpty]: Start isEmpty. Operand 168 states and 204 transitions.
[2020-07-20 14:30:34,013 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 207
[2020-07-20 14:30:34,014 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:34,014 INFO  L422         BasicCegarLoop]: trace histogram [32, 31, 31, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:34,226 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:34,227 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:34,227 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:34,227 INFO  L82        PathProgramCache]: Analyzing trace with hash 254282874, now seen corresponding path program 3 times
[2020-07-20 14:30:34,227 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:34,227 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664465362]
[2020-07-20 14:30:34,228 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:34,303 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:34,303 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:34,304 INFO  L263         TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-07-20 14:30:34,311 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:34,640 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 14:30:34,714 INFO  L134       CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked.
[2020-07-20 14:30:34,715 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:30:34,725 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,805 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,809 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,879 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,880 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,880 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,881 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,882 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,883 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,883 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,884 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,892 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,892 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,893 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,893 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,894 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,895 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,987 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,988 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,988 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,989 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,989 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:34,989 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,990 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:34,990 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,001 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,002 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,002 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,003 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,004 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,004 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,005 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,006 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,099 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,100 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,100 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,100 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,101 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,101 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,101 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,102 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,106 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,107 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,107 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,107 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,108 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,108 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,109 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,109 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,110 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,203 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,203 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,203 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,204 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,204 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,205 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,205 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,206 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,210 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,210 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,210 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:35,211 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,211 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,211 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,212 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,213 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,214 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,312 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,312 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,313 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:35,313 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,313 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,314 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,314 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,315 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,319 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,319 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,319 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,320 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,320 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,320 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,321 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,321 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:35,323 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:35,500 INFO  L134       CoverageAnalysis]: Checked inductivity of 2125 backedges. 62 proven. 203 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked.
[2020-07-20 14:30:35,500 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664465362]
[2020-07-20 14:30:35,500 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:30:35,500 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 37
[2020-07-20 14:30:35,500 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932936379]
[2020-07-20 14:30:35,501 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 37 states
[2020-07-20 14:30:35,501 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:35,502 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants.
[2020-07-20 14:30:35,502 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=896, Unknown=0, NotChecked=0, Total=1332
[2020-07-20 14:30:35,502 INFO  L87              Difference]: Start difference. First operand 168 states and 204 transitions. Second operand 37 states.
[2020-07-20 14:30:37,440 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:37,440 INFO  L93              Difference]: Finished difference Result 275 states and 376 transitions.
[2020-07-20 14:30:37,441 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. 
[2020-07-20 14:30:37,441 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states. Word has length 206
[2020-07-20 14:30:37,442 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:37,444 INFO  L225             Difference]: With dead ends: 275
[2020-07-20 14:30:37,444 INFO  L226             Difference]: Without dead ends: 239
[2020-07-20 14:30:37,446 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 373 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1051, Invalid=2371, Unknown=0, NotChecked=0, Total=3422
[2020-07-20 14:30:37,447 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 239 states.
[2020-07-20 14:30:37,464 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 231.
[2020-07-20 14:30:37,464 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 231 states.
[2020-07-20 14:30:37,466 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 290 transitions.
[2020-07-20 14:30:37,466 INFO  L78                 Accepts]: Start accepts. Automaton has 231 states and 290 transitions. Word has length 206
[2020-07-20 14:30:37,467 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:37,467 INFO  L479      AbstractCegarLoop]: Abstraction has 231 states and 290 transitions.
[2020-07-20 14:30:37,467 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 37 states.
[2020-07-20 14:30:37,467 INFO  L276                IsEmpty]: Start isEmpty. Operand 231 states and 290 transitions.
[2020-07-20 14:30:37,470 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 259
[2020-07-20 14:30:37,470 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:37,471 INFO  L422         BasicCegarLoop]: trace histogram [40, 39, 39, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:37,683 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:37,684 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:37,684 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:37,685 INFO  L82        PathProgramCache]: Analyzing trace with hash -1789545513, now seen corresponding path program 5 times
[2020-07-20 14:30:37,685 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:37,686 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493925613]
[2020-07-20 14:30:37,686 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:37,763 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:37,763 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:37,765 INFO  L263         TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 48 conjunts are in the unsatisfiable core
[2020-07-20 14:30:37,774 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:40,322 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:40,323 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 14:30:40,640 INFO  L134       CoverageAnalysis]: Checked inductivity of 3447 backedges. 78 proven. 405 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked.
[2020-07-20 14:30:40,640 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:30:40,722 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:40,865 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:40,870 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:40,976 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:40,985 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,044 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,044 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term
[2020-07-20 14:30:41,045 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:41,048 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 3 conjuncts
[2020-07-20 14:30:41,180 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,180 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term
[2020-07-20 14:30:41,180 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:41,184 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,185 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[4, 3, 1] term
[2020-07-20 14:30:41,185 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:41,265 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,266 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term
[2020-07-20 14:30:41,266 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts
[2020-07-20 14:30:41,271 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,272 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[5, 4, 1] term
[2020-07-20 14:30:41,272 INFO  L501       QuantifierPusher]: Distributing 3 disjuncts over 4 conjuncts
[2020-07-20 14:30:41,407 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts
[2020-07-20 14:30:41,414 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 4 conjuncts
[2020-07-20 14:30:41,483 INFO  L501       QuantifierPusher]: Distributing 5 disjuncts over 5 conjuncts
[2020-07-20 14:30:41,487 INFO  L501       QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,487 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term
[2020-07-20 14:30:41,488 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts
[2020-07-20 14:30:41,638 INFO  L501       QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,639 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term
[2020-07-20 14:30:41,639 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts
[2020-07-20 14:30:41,648 INFO  L501       QuantifierPusher]: Distributing 5 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,648 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[6, 5, 1] term
[2020-07-20 14:30:41,648 INFO  L501       QuantifierPusher]: Distributing 4 disjuncts over 5 conjuncts
[2020-07-20 14:30:41,730 INFO  L501       QuantifierPusher]: Distributing 6 disjuncts over 2 conjuncts
[2020-07-20 14:30:41,731 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[7, 6, 1] term
[2020-07-20 14:30:41,731 INFO  L501       QuantifierPusher]: Distributing 5 disjuncts over 6 conjuncts
[2020-07-20 14:30:41,737 INFO  L501       QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts
[2020-07-20 14:30:41,907 INFO  L501       QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts
[2020-07-20 14:30:41,914 INFO  L501       QuantifierPusher]: Distributing 6 disjuncts over 6 conjuncts
[2020-07-20 14:30:42,012 INFO  L501       QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts
[2020-07-20 14:30:42,018 INFO  L501       QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts
[2020-07-20 14:30:42,207 INFO  L501       QuantifierPusher]: Distributing 7 disjuncts over 7 conjuncts
[2020-07-20 14:30:42,213 INFO  L501       QuantifierPusher]: Distributing 7 disjuncts over 2 conjuncts
[2020-07-20 14:30:42,214 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[8, 7, 1] term
[2020-07-20 14:30:42,214 INFO  L501       QuantifierPusher]: Distributing 6 disjuncts over 7 conjuncts
[2020-07-20 14:30:42,318 INFO  L501       QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts
[2020-07-20 14:30:42,319 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term
[2020-07-20 14:30:42,320 INFO  L501       QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts
[2020-07-20 14:30:42,325 INFO  L501       QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts
[2020-07-20 14:30:42,326 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term
[2020-07-20 14:30:42,326 INFO  L501       QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts
[2020-07-20 14:30:42,512 INFO  L501       QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts
[2020-07-20 14:30:42,513 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term
[2020-07-20 14:30:42,514 INFO  L501       QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts
[2020-07-20 14:30:42,526 INFO  L501       QuantifierPusher]: Distributing 8 disjuncts over 2 conjuncts
[2020-07-20 14:30:42,527 INFO  L320       QuantifierPusher]: Applying distributivity to a DISJUNCTION[9, 8, 1] term
[2020-07-20 14:30:42,527 INFO  L501       QuantifierPusher]: Distributing 7 disjuncts over 8 conjuncts
[2020-07-20 14:30:42,636 INFO  L501       QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts
[2020-07-20 14:30:42,641 INFO  L501       QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts
[2020-07-20 14:30:42,859 INFO  L501       QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts
[2020-07-20 14:30:42,871 INFO  L501       QuantifierPusher]: Distributing 9 disjuncts over 9 conjuncts
[2020-07-20 14:30:43,007 INFO  L501       QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts
[2020-07-20 14:30:43,016 INFO  L501       QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts
[2020-07-20 14:30:43,245 INFO  L501       QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts
[2020-07-20 14:30:43,250 INFO  L501       QuantifierPusher]: Distributing 10 disjuncts over 10 conjuncts
[2020-07-20 14:30:43,644 INFO  L134       CoverageAnalysis]: Checked inductivity of 3447 backedges. 78 proven. 405 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked.
[2020-07-20 14:30:43,644 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493925613]
[2020-07-20 14:30:43,644 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:30:43,645 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 67
[2020-07-20 14:30:43,645 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420903116]
[2020-07-20 14:30:43,646 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 67 states
[2020-07-20 14:30:43,646 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:43,646 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants.
[2020-07-20 14:30:43,648 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=3521, Unknown=0, NotChecked=0, Total=4422
[2020-07-20 14:30:43,648 INFO  L87              Difference]: Start difference. First operand 231 states and 290 transitions. Second operand 67 states.
[2020-07-20 14:30:47,461 WARN  L193               SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 62
[2020-07-20 14:30:47,734 WARN  L193               SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 59
[2020-07-20 14:30:47,960 WARN  L193               SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 59
[2020-07-20 14:30:48,201 WARN  L193               SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 14:30:48,448 WARN  L193               SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 57
[2020-07-20 14:30:48,676 WARN  L193               SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 54
[2020-07-20 14:30:49,159 WARN  L193               SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 52
[2020-07-20 14:30:51,337 WARN  L193               SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 63
[2020-07-20 14:30:53,637 WARN  L193               SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 62
[2020-07-20 14:30:53,810 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:30:53,810 INFO  L93              Difference]: Finished difference Result 302 states and 398 transitions.
[2020-07-20 14:30:53,811 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. 
[2020-07-20 14:30:53,811 INFO  L78                 Accepts]: Start accepts. Automaton has 67 states. Word has length 258
[2020-07-20 14:30:53,811 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:30:53,814 INFO  L225             Difference]: With dead ends: 302
[2020-07-20 14:30:53,814 INFO  L226             Difference]: Without dead ends: 300
[2020-07-20 14:30:53,820 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 447 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4142 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=3232, Invalid=12770, Unknown=0, NotChecked=0, Total=16002
[2020-07-20 14:30:53,820 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 300 states.
[2020-07-20 14:30:53,840 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270.
[2020-07-20 14:30:53,840 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 270 states.
[2020-07-20 14:30:53,843 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 347 transitions.
[2020-07-20 14:30:53,843 INFO  L78                 Accepts]: Start accepts. Automaton has 270 states and 347 transitions. Word has length 258
[2020-07-20 14:30:53,844 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:30:53,844 INFO  L479      AbstractCegarLoop]: Abstraction has 270 states and 347 transitions.
[2020-07-20 14:30:53,844 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 67 states.
[2020-07-20 14:30:53,844 INFO  L276                IsEmpty]: Start isEmpty. Operand 270 states and 347 transitions.
[2020-07-20 14:30:53,851 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 407
[2020-07-20 14:30:53,851 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:30:53,852 INFO  L422         BasicCegarLoop]: trace histogram [64, 63, 63, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:30:54,065 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:54,066 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:30:54,066 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:30:54,067 INFO  L82        PathProgramCache]: Analyzing trace with hash -1039722502, now seen corresponding path program 4 times
[2020-07-20 14:30:54,067 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:30:54,068 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839631253]
[2020-07-20 14:30:54,068 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:30:54,194 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:30:54,194 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:30:54,198 INFO  L263         TraceCheckSpWp]: Trace formula consists of 729 conjuncts, 38 conjunts are in the unsatisfiable core
[2020-07-20 14:30:54,215 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:30:55,230 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 14:30:55,611 INFO  L134       CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked.
[2020-07-20 14:30:55,611 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:30:55,621 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,729 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,734 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,815 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,815 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,816 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,816 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,816 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,816 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,817 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,833 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,833 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,834 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,834 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,834 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,835 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,835 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,836 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,837 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,945 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,945 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,945 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,946 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,946 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,946 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,955 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,955 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,956 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,956 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,957 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,957 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:55,958 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:55,959 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:55,960 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,069 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,070 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,070 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:56,070 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,071 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,071 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,071 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,071 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,072 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,076 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,076 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,077 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:56,077 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,077 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,077 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,078 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,079 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,079 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,193 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,194 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,195 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,195 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,196 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,197 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,214 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,214 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,215 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,215 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,216 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,216 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,217 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,333 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,334 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,334 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,335 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,335 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,335 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:56,336 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,336 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,337 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,355 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,355 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,356 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,356 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,356 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,357 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:56,357 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,358 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,360 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,477 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,477 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,478 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,478 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,479 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,479 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,479 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,480 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,489 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,490 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,490 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:56,491 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,491 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,492 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,492 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,493 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,494 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,620 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,621 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,621 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,621 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,622 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,622 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,623 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,633 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,634 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,634 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,635 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,636 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,636 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,637 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,637 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,638 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,779 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,779 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,780 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:56,780 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,781 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,781 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,781 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,782 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,783 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,786 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,787 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,787 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,787 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,788 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,788 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,789 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,789 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,790 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,925 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,926 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,927 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,927 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,927 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,928 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:56,928 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,930 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,935 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:56,935 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,936 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,936 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:56,936 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:56,937 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,076 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,076 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,077 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,077 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,077 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,078 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,082 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,083 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,083 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:57,084 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,084 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,084 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,085 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,227 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,227 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,228 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,228 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,228 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,229 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:57,229 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,230 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,234 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,234 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,234 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,235 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,235 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,236 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,236 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,237 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,238 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,381 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,381 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,382 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,382 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,382 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,383 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,383 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,392 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,393 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,393 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,394 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,394 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,395 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,395 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,396 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,397 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,555 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,555 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,555 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,556 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,556 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,556 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:57,557 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,557 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,558 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,562 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,563 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,563 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts
[2020-07-20 14:30:57,563 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,564 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,564 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,564 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 14:30:57,565 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,566 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 14:30:57,970 INFO  L134       CoverageAnalysis]: Checked inductivity of 8913 backedges. 126 proven. 975 refuted. 0 times theorem prover too weak. 7812 trivial. 0 not checked.
[2020-07-20 14:30:57,970 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839631253]
[2020-07-20 14:30:57,971 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:30:57,971 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 69
[2020-07-20 14:30:57,971 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880169552]
[2020-07-20 14:30:57,972 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 69 states
[2020-07-20 14:30:57,972 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:30:57,973 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants.
[2020-07-20 14:30:57,974 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1628, Invalid=3064, Unknown=0, NotChecked=0, Total=4692
[2020-07-20 14:30:57,974 INFO  L87              Difference]: Start difference. First operand 270 states and 347 transitions. Second operand 69 states.
[2020-07-20 14:31:02,583 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:31:02,584 INFO  L93              Difference]: Finished difference Result 455 states and 649 transitions.
[2020-07-20 14:31:02,584 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. 
[2020-07-20 14:31:02,584 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states. Word has length 406
[2020-07-20 14:31:02,585 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:31:02,588 INFO  L225             Difference]: With dead ends: 455
[2020-07-20 14:31:02,588 INFO  L226             Difference]: Without dead ends: 395
[2020-07-20 14:31:02,593 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 741 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3587, Invalid=7755, Unknown=0, NotChecked=0, Total=11342
[2020-07-20 14:31:02,593 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 395 states.
[2020-07-20 14:31:02,623 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 387.
[2020-07-20 14:31:02,624 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 387 states.
[2020-07-20 14:31:02,626 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 507 transitions.
[2020-07-20 14:31:02,626 INFO  L78                 Accepts]: Start accepts. Automaton has 387 states and 507 transitions. Word has length 406
[2020-07-20 14:31:02,627 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:31:02,627 INFO  L479      AbstractCegarLoop]: Abstraction has 387 states and 507 transitions.
[2020-07-20 14:31:02,627 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 69 states.
[2020-07-20 14:31:02,628 INFO  L276                IsEmpty]: Start isEmpty. Operand 387 states and 507 transitions.
[2020-07-20 14:31:02,631 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 509
[2020-07-20 14:31:02,632 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:31:02,632 INFO  L422         BasicCegarLoop]: trace histogram [80, 79, 79, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:31:02,839 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:31:02,840 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:31:02,840 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:31:02,841 INFO  L82        PathProgramCache]: Analyzing trace with hash -1959696841, now seen corresponding path program 6 times
[2020-07-20 14:31:02,841 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:31:02,842 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956901462]
[2020-07-20 14:31:02,842 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:31:02,990 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:31:02,991 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:31:02,996 INFO  L263         TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 88 conjunts are in the unsatisfiable core
[2020-07-20 14:31:03,006 INFO  L286         TraceCheckSpWp]: Computing forward predicates...