/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i


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


This is Ultimate 0.1.25-b981219
[2020-04-17 18:46:27,553 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-04-17 18:46:27,556 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-04-17 18:46:27,573 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-04-17 18:46:27,574 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-04-17 18:46:27,576 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-04-17 18:46:27,578 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-04-17 18:46:27,596 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
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[2020-04-17 18:46:27,605 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-04-17 18:46:27,607 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-04-17 18:46:27,608 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-04-17 18:46:27,614 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-04-17 18:46:27,617 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-04-17 18:46:27,619 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-04-17 18:46:27,620 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-04-17 18:46:27,621 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-04-17 18:46:27,624 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-04-17 18:46:27,625 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-04-17 18:46:27,627 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-04-17 18:46:27,628 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-04-17 18:46:27,630 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-04-17 18:46:27,631 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
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[2020-04-17 18:46:27,637 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-04-17 18:46:27,638 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-04-17 18:46:27,640 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-04-17 18:46:27,640 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf
[2020-04-17 18:46:27,662 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-04-17 18:46:27,663 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-04-17 18:46:27,666 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-04-17 18:46:27,666 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-04-17 18:46:27,666 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-04-17 18:46:27,666 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-04-17 18:46:27,667 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-04-17 18:46:27,667 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-04-17 18:46:27,667 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-04-17 18:46:27,667 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-04-17 18:46:27,668 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-04-17 18:46:27,669 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-04-17 18:46:27,669 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-04-17 18:46:27,669 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-04-17 18:46:27,669 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-04-17 18:46:27,669 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-04-17 18:46:27,670 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-04-17 18:46:27,670 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-04-17 18:46:27,670 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-04-17 18:46:27,670 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-04-17 18:46:27,670 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-04-17 18:46:27,671 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-04-17 18:46:27,671 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-04-17 18:46:27,671 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-04-17 18:46:27,671 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-04-17 18:46:27,671 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-04-17 18:46:27,672 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-04-17 18:46:27,672 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-04-17 18:46:27,672 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2020-04-17 18:46:27,946 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-04-17 18:46:27,965 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-04-17 18:46:27,969 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-04-17 18:46:27,970 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-04-17 18:46:27,970 INFO  L275        PluginConnector]: CDTParser initialized
[2020-04-17 18:46:27,971 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i
[2020-04-17 18:46:28,035 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7346879b5/21349b9544ed47488882c9fee9cf6f55/FLAGbc32ead0e
[2020-04-17 18:46:28,548 INFO  L306              CDTParser]: Found 1 translation units.
[2020-04-17 18:46:28,549 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i
[2020-04-17 18:46:28,565 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7346879b5/21349b9544ed47488882c9fee9cf6f55/FLAGbc32ead0e
[2020-04-17 18:46:28,889 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7346879b5/21349b9544ed47488882c9fee9cf6f55
[2020-04-17 18:46:28,897 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-04-17 18:46:28,918 INFO  L131        ToolchainWalker]: Walking toolchain with 5 elements.
[2020-04-17 18:46:28,919 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-04-17 18:46:28,919 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-04-17 18:46:28,923 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-04-17 18:46:28,924 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:46:28" (1/1) ...
[2020-04-17 18:46:28,926 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38fc7f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:28, skipping insertion in model container
[2020-04-17 18:46:28,927 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.04 06:46:28" (1/1) ...
[2020-04-17 18:46:28,934 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-04-17 18:46:28,987 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-04-17 18:46:29,472 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-04-17 18:46:29,483 INFO  L203         MainTranslator]: Completed pre-run
[2020-04-17 18:46:29,528 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-04-17 18:46:29,597 INFO  L208         MainTranslator]: Completed translation
[2020-04-17 18:46:29,598 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29 WrapperNode
[2020-04-17 18:46:29,598 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-04-17 18:46:29,599 INFO  L113        PluginConnector]: ------------------------Boogie Procedure Inliner----------------------------
[2020-04-17 18:46:29,599 INFO  L271        PluginConnector]: Initializing Boogie Procedure Inliner...
[2020-04-17 18:46:29,600 INFO  L275        PluginConnector]: Boogie Procedure Inliner initialized
[2020-04-17 18:46:29,608 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (1/1) ...
[2020-04-17 18:46:29,625 INFO  L185        PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (1/1) ...
[2020-04-17 18:46:29,643 INFO  L132        PluginConnector]: ------------------------ END Boogie Procedure Inliner----------------------------
[2020-04-17 18:46:29,643 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-04-17 18:46:29,643 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-04-17 18:46:29,643 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-04-17 18:46:29,653 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (1/1) ...
[2020-04-17 18:46:29,653 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (1/1) ...
[2020-04-17 18:46:29,655 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (1/1) ...
[2020-04-17 18:46:29,656 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (1/1) ...
[2020-04-17 18:46:29,661 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (1/1) ...
[2020-04-17 18:46:29,665 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (1/1) ...
[2020-04-17 18:46:29,667 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (1/1) ...
[2020-04-17 18:46:29,670 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-04-17 18:46:29,672 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-04-17 18:46:29,672 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-04-17 18:46:29,672 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-04-17 18:46:29,673 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (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
[2020-04-17 18:46:29,724 INFO  L130     BoogieDeclarations]: Found specification of procedure t1
[2020-04-17 18:46:29,725 INFO  L138     BoogieDeclarations]: Found implementation of procedure t1
[2020-04-17 18:46:29,725 INFO  L130     BoogieDeclarations]: Found specification of procedure t2
[2020-04-17 18:46:29,725 INFO  L138     BoogieDeclarations]: Found implementation of procedure t2
[2020-04-17 18:46:29,725 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-04-17 18:46:29,725 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin
[2020-04-17 18:46:29,726 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-04-17 18:46:29,726 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-04-17 18:46:29,726 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end
[2020-04-17 18:46:29,727 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-04-17 18:46:29,727 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-04-17 18:46:29,729 WARN  L205             CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement
[2020-04-17 18:46:30,056 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-04-17 18:46:30,056 INFO  L295             CfgBuilder]: Removed 6 assume(true) statements.
[2020-04-17 18:46:30,060 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:46:30 BoogieIcfgContainer
[2020-04-17 18:46:30,060 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-04-17 18:46:30,061 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-04-17 18:46:30,061 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-04-17 18:46:30,064 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-04-17 18:46:30,065 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.04 06:46:28" (1/3) ...
[2020-04-17 18:46:30,065 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4d557d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:46:30, skipping insertion in model container
[2020-04-17 18:46:30,066 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.04 06:46:29" (2/3) ...
[2020-04-17 18:46:30,066 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f4d557d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.04 06:46:30, skipping insertion in model container
[2020-04-17 18:46:30,066 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.04 06:46:30" (3/3) ...
[2020-04-17 18:46:30,068 INFO  L109   eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i
[2020-04-17 18:46:30,078 WARN  L146   ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program
[2020-04-17 18:46:30,078 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-04-17 18:46:30,084 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-04-17 18:46:30,085 INFO  L340   ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances.
[2020-04-17 18:46:30,107 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,107 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,108 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,108 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,109 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,109 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,109 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,110 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,110 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,110 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,111 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,111 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,111 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,111 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,112 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,112 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,112 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,113 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,113 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,113 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,113 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,114 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,114 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,121 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,121 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,122 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,124 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,124 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,129 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,129 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,129 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,130 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,130 WARN  L315   ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,132 WARN  L315   ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,139 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,139 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,140 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,140 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,140 WARN  L315   ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,141 WARN  L315   ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes.
[2020-04-17 18:46:30,159 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 3 error locations.
[2020-04-17 18:46:30,177 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-04-17 18:46:30,177 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-04-17 18:46:30,177 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-04-17 18:46:30,177 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-04-17 18:46:30,178 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-04-17 18:46:30,178 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-04-17 18:46:30,178 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-04-17 18:46:30,178 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-04-17 18:46:30,192 INFO  L152   etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow
[2020-04-17 18:46:30,194 INFO  L71            FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow
[2020-04-17 18:46:30,235 INFO  L129       PetriNetUnfolder]: 5/53 cut-off events.
[2020-04-17 18:46:30,236 INFO  L130       PetriNetUnfolder]: For 0/0 co-relation queries the response was YES.
[2020-04-17 18:46:30,241 INFO  L80            FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. 
[2020-04-17 18:46:30,244 INFO  L71            FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow
[2020-04-17 18:46:30,265 INFO  L129       PetriNetUnfolder]: 5/53 cut-off events.
[2020-04-17 18:46:30,266 INFO  L130       PetriNetUnfolder]: For 0/0 co-relation queries the response was YES.
[2020-04-17 18:46:30,267 INFO  L80            FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. 
[2020-04-17 18:46:30,269 INFO  L158   etLargeBlockEncoding]: Number of co-enabled transitions 924
[2020-04-17 18:46:30,270 INFO  L170   etLargeBlockEncoding]: Semantic Check.
[2020-04-17 18:46:31,412 WARN  L192               SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55
[2020-04-17 18:46:31,660 INFO  L206   etLargeBlockEncoding]: Checked pairs total: 851
[2020-04-17 18:46:31,660 INFO  L214   etLargeBlockEncoding]: Total number of compositions: 42
[2020-04-17 18:46:31,664 INFO  L100   iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow
[2020-04-17 18:46:31,672 INFO  L122   iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states.
[2020-04-17 18:46:31,674 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states.
[2020-04-17 18:46:31,680 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 7
[2020-04-17 18:46:31,681 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:31,682 INFO  L425         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:31,682 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:31,688 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:31,688 INFO  L82        PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times
[2020-04-17 18:46:31,697 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:31,697 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434281402]
[2020-04-17 18:46:31,698 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:31,795 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:31,877 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:31,877 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434281402]
[2020-04-17 18:46:31,878 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-04-17 18:46:31,879 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-04-17 18:46:31,879 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494829808]
[2020-04-17 18:46:31,884 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-04-17 18:46:31,884 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:31,898 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-04-17 18:46:31,899 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-04-17 18:46:31,901 INFO  L87              Difference]: Start difference. First operand 44 states. Second operand 4 states.
[2020-04-17 18:46:31,976 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:31,977 INFO  L93              Difference]: Finished difference Result 75 states and 190 transitions.
[2020-04-17 18:46:31,977 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-04-17 18:46:31,978 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 6
[2020-04-17 18:46:31,979 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:31,990 INFO  L225             Difference]: With dead ends: 75
[2020-04-17 18:46:31,991 INFO  L226             Difference]: Without dead ends: 42
[2020-04-17 18:46:31,992 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-04-17 18:46:32,009 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-04-17 18:46:32,026 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42.
[2020-04-17 18:46:32,028 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-04-17 18:46:32,029 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions.
[2020-04-17 18:46:32,030 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6
[2020-04-17 18:46:32,031 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:32,031 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 98 transitions.
[2020-04-17 18:46:32,031 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-04-17 18:46:32,031 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions.
[2020-04-17 18:46:32,032 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 9
[2020-04-17 18:46:32,032 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:32,032 INFO  L425         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:32,033 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:32,033 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:32,033 INFO  L82        PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times
[2020-04-17 18:46:32,033 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:32,034 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17394059]
[2020-04-17 18:46:32,034 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:32,072 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:32,162 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:32,163 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17394059]
[2020-04-17 18:46:32,163 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-04-17 18:46:32,164 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-04-17 18:46:32,164 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009866671]
[2020-04-17 18:46:32,165 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-04-17 18:46:32,166 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:32,166 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-04-17 18:46:32,166 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-04-17 18:46:32,166 INFO  L87              Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states.
[2020-04-17 18:46:32,198 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:32,198 INFO  L93              Difference]: Finished difference Result 56 states and 130 transitions.
[2020-04-17 18:46:32,198 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-04-17 18:46:32,198 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 8
[2020-04-17 18:46:32,199 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:32,200 INFO  L225             Difference]: With dead ends: 56
[2020-04-17 18:46:32,200 INFO  L226             Difference]: Without dead ends: 50
[2020-04-17 18:46:32,201 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30
[2020-04-17 18:46:32,201 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2020-04-17 18:46:32,207 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42.
[2020-04-17 18:46:32,207 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-04-17 18:46:32,208 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions.
[2020-04-17 18:46:32,208 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8
[2020-04-17 18:46:32,209 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:32,209 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 100 transitions.
[2020-04-17 18:46:32,209 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-04-17 18:46:32,210 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions.
[2020-04-17 18:46:32,210 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-04-17 18:46:32,210 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:32,211 INFO  L425         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:32,211 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:32,211 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:32,211 INFO  L82        PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times
[2020-04-17 18:46:32,211 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:32,211 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179815206]
[2020-04-17 18:46:32,211 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:32,231 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:32,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:32,282 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179815206]
[2020-04-17 18:46:32,282 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-04-17 18:46:32,282 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-04-17 18:46:32,283 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029671762]
[2020-04-17 18:46:32,283 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-04-17 18:46:32,283 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:32,283 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-04-17 18:46:32,284 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-04-17 18:46:32,284 INFO  L87              Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states.
[2020-04-17 18:46:32,370 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:32,370 INFO  L93              Difference]: Finished difference Result 78 states and 180 transitions.
[2020-04-17 18:46:32,372 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-04-17 18:46:32,372 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 10
[2020-04-17 18:46:32,372 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:32,373 INFO  L225             Difference]: With dead ends: 78
[2020-04-17 18:46:32,373 INFO  L226             Difference]: Without dead ends: 71
[2020-04-17 18:46:32,373 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2020-04-17 18:46:32,376 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2020-04-17 18:46:32,383 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46.
[2020-04-17 18:46:32,383 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-04-17 18:46:32,384 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions.
[2020-04-17 18:46:32,384 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10
[2020-04-17 18:46:32,384 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:32,384 INFO  L479      AbstractCegarLoop]: Abstraction has 46 states and 113 transitions.
[2020-04-17 18:46:32,385 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-04-17 18:46:32,385 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions.
[2020-04-17 18:46:32,385 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-04-17 18:46:32,386 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:32,386 INFO  L425         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:32,386 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:32,386 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:32,386 INFO  L82        PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times
[2020-04-17 18:46:32,387 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:32,387 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524342128]
[2020-04-17 18:46:32,387 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:32,402 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:32,462 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:32,463 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524342128]
[2020-04-17 18:46:32,463 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-04-17 18:46:32,463 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-04-17 18:46:32,463 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992797464]
[2020-04-17 18:46:32,464 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-04-17 18:46:32,464 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:32,464 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-04-17 18:46:32,464 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-04-17 18:46:32,465 INFO  L87              Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states.
[2020-04-17 18:46:32,538 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:32,538 INFO  L93              Difference]: Finished difference Result 54 states and 125 transitions.
[2020-04-17 18:46:32,541 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-04-17 18:46:32,541 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 10
[2020-04-17 18:46:32,542 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:32,542 INFO  L225             Difference]: With dead ends: 54
[2020-04-17 18:46:32,542 INFO  L226             Difference]: Without dead ends: 43
[2020-04-17 18:46:32,543 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2020-04-17 18:46:32,544 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2020-04-17 18:46:32,548 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34.
[2020-04-17 18:46:32,548 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-04-17 18:46:32,549 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions.
[2020-04-17 18:46:32,549 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10
[2020-04-17 18:46:32,549 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:32,549 INFO  L479      AbstractCegarLoop]: Abstraction has 34 states and 80 transitions.
[2020-04-17 18:46:32,549 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-04-17 18:46:32,550 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions.
[2020-04-17 18:46:32,550 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-04-17 18:46:32,550 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:32,550 INFO  L425         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:32,551 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:32,551 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:32,551 INFO  L82        PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times
[2020-04-17 18:46:32,551 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:32,551 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588762640]
[2020-04-17 18:46:32,552 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:32,566 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:32,618 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:32,618 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588762640]
[2020-04-17 18:46:32,619 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-04-17 18:46:32,619 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-04-17 18:46:32,619 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839390122]
[2020-04-17 18:46:32,620 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-04-17 18:46:32,620 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:32,620 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-04-17 18:46:32,621 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-04-17 18:46:32,621 INFO  L87              Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states.
[2020-04-17 18:46:32,696 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:32,697 INFO  L93              Difference]: Finished difference Result 57 states and 133 transitions.
[2020-04-17 18:46:32,697 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-04-17 18:46:32,697 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 10
[2020-04-17 18:46:32,698 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:32,698 INFO  L225             Difference]: With dead ends: 57
[2020-04-17 18:46:32,698 INFO  L226             Difference]: Without dead ends: 51
[2020-04-17 18:46:32,699 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72
[2020-04-17 18:46:32,700 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 51 states.
[2020-04-17 18:46:32,703 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40.
[2020-04-17 18:46:32,703 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 40 states.
[2020-04-17 18:46:32,704 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions.
[2020-04-17 18:46:32,704 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10
[2020-04-17 18:46:32,704 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:32,704 INFO  L479      AbstractCegarLoop]: Abstraction has 40 states and 97 transitions.
[2020-04-17 18:46:32,704 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-04-17 18:46:32,704 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions.
[2020-04-17 18:46:32,705 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-04-17 18:46:32,705 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:32,705 INFO  L425         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:32,706 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:32,706 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:32,706 INFO  L82        PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times
[2020-04-17 18:46:32,706 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:32,706 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178056760]
[2020-04-17 18:46:32,707 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:32,720 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:32,767 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:32,768 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178056760]
[2020-04-17 18:46:32,768 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972081378]
[2020-04-17 18:46:32,768 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:32,851 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:46:32,851 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:32,853 INFO  L264         TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-04-17 18:46:32,858 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:32,886 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:32,910 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:32,910 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:32,911 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6
[2020-04-17 18:46:32,911 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643496663]
[2020-04-17 18:46:32,911 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-04-17 18:46:32,912 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:32,912 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-04-17 18:46:32,912 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2020-04-17 18:46:32,912 INFO  L87              Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states.
[2020-04-17 18:46:33,012 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:33,012 INFO  L93              Difference]: Finished difference Result 48 states and 117 transitions.
[2020-04-17 18:46:33,013 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-04-17 18:46:33,013 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 11
[2020-04-17 18:46:33,013 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:33,014 INFO  L225             Difference]: With dead ends: 48
[2020-04-17 18:46:33,014 INFO  L226             Difference]: Without dead ends: 43
[2020-04-17 18:46:33,014 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:33,015 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2020-04-17 18:46:33,018 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34.
[2020-04-17 18:46:33,018 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-04-17 18:46:33,019 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions.
[2020-04-17 18:46:33,019 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11
[2020-04-17 18:46:33,019 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:33,019 INFO  L479      AbstractCegarLoop]: Abstraction has 34 states and 82 transitions.
[2020-04-17 18:46:33,019 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-04-17 18:46:33,019 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions.
[2020-04-17 18:46:33,020 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-04-17 18:46:33,020 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:33,020 INFO  L425         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:33,224 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:33,225 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:33,225 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:33,225 INFO  L82        PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times
[2020-04-17 18:46:33,226 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:33,226 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917788522]
[2020-04-17 18:46:33,227 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:33,238 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:33,306 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:33,306 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917788522]
[2020-04-17 18:46:33,307 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379971059]
[2020-04-17 18:46:33,307 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:33,356 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:46:33,356 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:33,357 INFO  L264         TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-04-17 18:46:33,358 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:33,369 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:33,369 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:33,370 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5
[2020-04-17 18:46:33,370 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89517835]
[2020-04-17 18:46:33,370 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-04-17 18:46:33,370 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:33,371 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-04-17 18:46:33,371 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-04-17 18:46:33,371 INFO  L87              Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states.
[2020-04-17 18:46:33,441 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:33,441 INFO  L93              Difference]: Finished difference Result 54 states and 125 transitions.
[2020-04-17 18:46:33,441 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-04-17 18:46:33,441 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 11
[2020-04-17 18:46:33,442 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:33,442 INFO  L225             Difference]: With dead ends: 54
[2020-04-17 18:46:33,442 INFO  L226             Difference]: Without dead ends: 48
[2020-04-17 18:46:33,443 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2020-04-17 18:46:33,444 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2020-04-17 18:46:33,452 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42.
[2020-04-17 18:46:33,452 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-04-17 18:46:33,453 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions.
[2020-04-17 18:46:33,453 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11
[2020-04-17 18:46:33,453 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:33,453 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 101 transitions.
[2020-04-17 18:46:33,453 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-04-17 18:46:33,453 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions.
[2020-04-17 18:46:33,454 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-04-17 18:46:33,454 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:33,454 INFO  L425         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:33,662 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:33,662 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:33,662 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:33,663 INFO  L82        PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times
[2020-04-17 18:46:33,663 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:33,663 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126605094]
[2020-04-17 18:46:33,663 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:33,674 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:33,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:33,722 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126605094]
[2020-04-17 18:46:33,723 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472483122]
[2020-04-17 18:46:33,723 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:33,780 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s)
[2020-04-17 18:46:33,781 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:33,781 INFO  L264         TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-04-17 18:46:33,782 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:33,794 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:33,806 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:33,806 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:33,807 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6
[2020-04-17 18:46:33,807 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618322738]
[2020-04-17 18:46:33,807 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-04-17 18:46:33,807 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:33,808 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-04-17 18:46:33,808 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-04-17 18:46:33,808 INFO  L87              Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states.
[2020-04-17 18:46:33,918 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:33,918 INFO  L93              Difference]: Finished difference Result 58 states and 133 transitions.
[2020-04-17 18:46:33,918 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-04-17 18:46:33,919 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 11
[2020-04-17 18:46:33,919 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:33,919 INFO  L225             Difference]: With dead ends: 58
[2020-04-17 18:46:33,920 INFO  L226             Difference]: Without dead ends: 52
[2020-04-17 18:46:33,920 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:33,921 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2020-04-17 18:46:33,924 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40.
[2020-04-17 18:46:33,924 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 40 states.
[2020-04-17 18:46:33,924 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions.
[2020-04-17 18:46:33,925 INFO  L78                 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11
[2020-04-17 18:46:33,925 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:33,925 INFO  L479      AbstractCegarLoop]: Abstraction has 40 states and 97 transitions.
[2020-04-17 18:46:33,925 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-04-17 18:46:33,925 INFO  L276                IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions.
[2020-04-17 18:46:33,926 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-04-17 18:46:33,926 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:33,926 INFO  L425         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:34,130 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:34,131 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:34,131 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:34,131 INFO  L82        PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times
[2020-04-17 18:46:34,131 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:34,132 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723649183]
[2020-04-17 18:46:34,132 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:34,141 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:34,191 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:34,191 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723649183]
[2020-04-17 18:46:34,192 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025152861]
[2020-04-17 18:46:34,192 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:34,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:34,234 INFO  L264         TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-04-17 18:46:34,235 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:34,244 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:34,245 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:34,245 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5
[2020-04-17 18:46:34,245 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854290650]
[2020-04-17 18:46:34,246 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-04-17 18:46:34,246 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:34,246 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-04-17 18:46:34,246 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-04-17 18:46:34,246 INFO  L87              Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states.
[2020-04-17 18:46:34,385 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:34,385 INFO  L93              Difference]: Finished difference Result 78 states and 183 transitions.
[2020-04-17 18:46:34,386 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-04-17 18:46:34,386 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 11
[2020-04-17 18:46:34,386 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:34,387 INFO  L225             Difference]: With dead ends: 78
[2020-04-17 18:46:34,387 INFO  L226             Difference]: Without dead ends: 72
[2020-04-17 18:46:34,388 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:34,389 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-04-17 18:46:34,393 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46.
[2020-04-17 18:46:34,393 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-04-17 18:46:34,394 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions.
[2020-04-17 18:46:34,394 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11
[2020-04-17 18:46:34,394 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:34,394 INFO  L479      AbstractCegarLoop]: Abstraction has 46 states and 117 transitions.
[2020-04-17 18:46:34,394 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-04-17 18:46:34,394 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions.
[2020-04-17 18:46:34,395 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-04-17 18:46:34,395 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:34,395 INFO  L425         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:34,605 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:34,607 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:34,607 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:34,607 INFO  L82        PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times
[2020-04-17 18:46:34,608 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:34,608 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74598557]
[2020-04-17 18:46:34,609 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:34,619 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:34,677 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:34,678 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74598557]
[2020-04-17 18:46:34,678 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114834211]
[2020-04-17 18:46:34,678 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:34,734 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:46:34,734 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:34,735 INFO  L264         TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-04-17 18:46:34,738 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:34,786 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:34,787 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:34,787 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6
[2020-04-17 18:46:34,787 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342796433]
[2020-04-17 18:46:34,788 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-04-17 18:46:34,788 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:34,788 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-04-17 18:46:34,789 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-04-17 18:46:34,789 INFO  L87              Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states.
[2020-04-17 18:46:34,982 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:34,983 INFO  L93              Difference]: Finished difference Result 62 states and 145 transitions.
[2020-04-17 18:46:34,983 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-04-17 18:46:34,983 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 11
[2020-04-17 18:46:34,984 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:34,984 INFO  L225             Difference]: With dead ends: 62
[2020-04-17 18:46:34,985 INFO  L226             Difference]: Without dead ends: 54
[2020-04-17 18:46:34,985 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:46:34,986 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2020-04-17 18:46:34,990 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43.
[2020-04-17 18:46:34,991 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 43 states.
[2020-04-17 18:46:34,997 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions.
[2020-04-17 18:46:34,998 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11
[2020-04-17 18:46:34,998 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:34,998 INFO  L479      AbstractCegarLoop]: Abstraction has 43 states and 105 transitions.
[2020-04-17 18:46:34,998 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-04-17 18:46:34,999 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions.
[2020-04-17 18:46:34,999 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-04-17 18:46:35,000 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:35,000 INFO  L425         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:35,206 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:35,212 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:35,212 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:35,212 INFO  L82        PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times
[2020-04-17 18:46:35,212 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:35,213 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141288873]
[2020-04-17 18:46:35,213 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:35,222 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:35,280 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:35,282 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141288873]
[2020-04-17 18:46:35,282 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920730561]
[2020-04-17 18:46:35,282 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:35,329 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s)
[2020-04-17 18:46:35,329 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:35,332 INFO  L264         TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-04-17 18:46:35,333 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:35,343 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:35,344 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:35,344 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6
[2020-04-17 18:46:35,345 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328405440]
[2020-04-17 18:46:35,345 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-04-17 18:46:35,346 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:35,346 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-04-17 18:46:35,349 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-04-17 18:46:35,349 INFO  L87              Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states.
[2020-04-17 18:46:35,441 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:35,442 INFO  L93              Difference]: Finished difference Result 64 states and 147 transitions.
[2020-04-17 18:46:35,442 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-04-17 18:46:35,442 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 12
[2020-04-17 18:46:35,442 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:35,443 INFO  L225             Difference]: With dead ends: 64
[2020-04-17 18:46:35,443 INFO  L226             Difference]: Without dead ends: 58
[2020-04-17 18:46:35,444 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:35,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 58 states.
[2020-04-17 18:46:35,449 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45.
[2020-04-17 18:46:35,449 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-04-17 18:46:35,450 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions.
[2020-04-17 18:46:35,450 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12
[2020-04-17 18:46:35,452 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:35,452 INFO  L479      AbstractCegarLoop]: Abstraction has 45 states and 109 transitions.
[2020-04-17 18:46:35,452 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-04-17 18:46:35,452 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions.
[2020-04-17 18:46:35,453 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-04-17 18:46:35,453 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:35,453 INFO  L425         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:35,653 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:35,654 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:35,655 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:35,655 INFO  L82        PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times
[2020-04-17 18:46:35,656 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:35,656 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709066842]
[2020-04-17 18:46:35,657 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:35,666 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:35,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:35,748 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709066842]
[2020-04-17 18:46:35,748 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059393597]
[2020-04-17 18:46:35,748 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:35,814 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:46:35,815 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:35,816 INFO  L264         TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-04-17 18:46:35,817 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:35,859 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:35,868 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:35,868 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:35,868 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7
[2020-04-17 18:46:35,869 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892698567]
[2020-04-17 18:46:35,869 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-04-17 18:46:35,869 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:35,870 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-04-17 18:46:35,870 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-04-17 18:46:35,870 INFO  L87              Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states.
[2020-04-17 18:46:36,044 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:36,045 INFO  L93              Difference]: Finished difference Result 61 states and 141 transitions.
[2020-04-17 18:46:36,045 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-04-17 18:46:36,045 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 12
[2020-04-17 18:46:36,045 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:36,046 INFO  L225             Difference]: With dead ends: 61
[2020-04-17 18:46:36,046 INFO  L226             Difference]: Without dead ends: 55
[2020-04-17 18:46:36,046 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:46:36,047 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2020-04-17 18:46:36,049 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44.
[2020-04-17 18:46:36,050 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 44 states.
[2020-04-17 18:46:36,050 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions.
[2020-04-17 18:46:36,050 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12
[2020-04-17 18:46:36,050 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:36,051 INFO  L479      AbstractCegarLoop]: Abstraction has 44 states and 107 transitions.
[2020-04-17 18:46:36,051 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-04-17 18:46:36,051 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions.
[2020-04-17 18:46:36,051 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-04-17 18:46:36,051 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:36,052 INFO  L425         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:36,255 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:36,256 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:36,257 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:36,257 INFO  L82        PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times
[2020-04-17 18:46:36,257 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:36,260 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644773950]
[2020-04-17 18:46:36,260 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:36,270 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:36,325 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:36,325 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644773950]
[2020-04-17 18:46:36,326 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719339075]
[2020-04-17 18:46:36,326 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:36,365 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:46:36,365 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:36,366 INFO  L264         TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-04-17 18:46:36,367 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:36,386 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:36,387 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:36,387 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6
[2020-04-17 18:46:36,387 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182264593]
[2020-04-17 18:46:36,388 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-04-17 18:46:36,388 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:36,388 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-04-17 18:46:36,388 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-04-17 18:46:36,388 INFO  L87              Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states.
[2020-04-17 18:46:36,521 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:36,521 INFO  L93              Difference]: Finished difference Result 77 states and 181 transitions.
[2020-04-17 18:46:36,521 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-04-17 18:46:36,521 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 12
[2020-04-17 18:46:36,522 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:36,522 INFO  L225             Difference]: With dead ends: 77
[2020-04-17 18:46:36,522 INFO  L226             Difference]: Without dead ends: 71
[2020-04-17 18:46:36,523 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:46:36,524 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2020-04-17 18:46:36,526 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48.
[2020-04-17 18:46:36,526 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2020-04-17 18:46:36,527 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions.
[2020-04-17 18:46:36,527 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12
[2020-04-17 18:46:36,527 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:36,527 INFO  L479      AbstractCegarLoop]: Abstraction has 48 states and 121 transitions.
[2020-04-17 18:46:36,527 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-04-17 18:46:36,528 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions.
[2020-04-17 18:46:36,528 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-04-17 18:46:36,528 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:36,528 INFO  L425         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:36,732 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:36,733 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:36,733 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:36,734 INFO  L82        PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times
[2020-04-17 18:46:36,734 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:36,734 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815865297]
[2020-04-17 18:46:36,734 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:36,742 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:36,827 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:36,828 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815865297]
[2020-04-17 18:46:36,828 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594231390]
[2020-04-17 18:46:36,828 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:36,868 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s)
[2020-04-17 18:46:36,868 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:36,869 INFO  L264         TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-04-17 18:46:36,870 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:36,897 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:36,899 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:36,899 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7
[2020-04-17 18:46:36,899 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372959348]
[2020-04-17 18:46:36,900 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-04-17 18:46:36,900 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:36,900 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-04-17 18:46:36,900 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2020-04-17 18:46:36,900 INFO  L87              Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states.
[2020-04-17 18:46:37,071 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:37,071 INFO  L93              Difference]: Finished difference Result 56 states and 133 transitions.
[2020-04-17 18:46:37,071 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-04-17 18:46:37,072 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 12
[2020-04-17 18:46:37,072 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:37,072 INFO  L225             Difference]: With dead ends: 56
[2020-04-17 18:46:37,072 INFO  L226             Difference]: Without dead ends: 48
[2020-04-17 18:46:37,073 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:46:37,073 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 48 states.
[2020-04-17 18:46:37,075 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37.
[2020-04-17 18:46:37,075 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2020-04-17 18:46:37,075 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions.
[2020-04-17 18:46:37,076 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12
[2020-04-17 18:46:37,076 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:37,076 INFO  L479      AbstractCegarLoop]: Abstraction has 37 states and 88 transitions.
[2020-04-17 18:46:37,076 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-04-17 18:46:37,076 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions.
[2020-04-17 18:46:37,077 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-04-17 18:46:37,077 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:37,077 INFO  L425         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:37,280 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:37,280 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:37,280 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:37,280 INFO  L82        PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times
[2020-04-17 18:46:37,281 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:37,281 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830207120]
[2020-04-17 18:46:37,281 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:37,297 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:37,366 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:37,367 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830207120]
[2020-04-17 18:46:37,367 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787063505]
[2020-04-17 18:46:37,367 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:37,418 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:37,419 INFO  L264         TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-04-17 18:46:37,420 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:37,436 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:37,445 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:37,445 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:37,445 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7
[2020-04-17 18:46:37,446 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468567470]
[2020-04-17 18:46:37,446 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-04-17 18:46:37,446 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:37,446 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-04-17 18:46:37,446 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72
[2020-04-17 18:46:37,447 INFO  L87              Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states.
[2020-04-17 18:46:37,645 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:37,646 INFO  L93              Difference]: Finished difference Result 60 states and 143 transitions.
[2020-04-17 18:46:37,646 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-04-17 18:46:37,646 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 12
[2020-04-17 18:46:37,647 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:37,647 INFO  L225             Difference]: With dead ends: 60
[2020-04-17 18:46:37,647 INFO  L226             Difference]: Without dead ends: 55
[2020-04-17 18:46:37,648 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:46:37,649 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2020-04-17 18:46:37,650 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46.
[2020-04-17 18:46:37,650 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-04-17 18:46:37,651 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions.
[2020-04-17 18:46:37,651 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12
[2020-04-17 18:46:37,651 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:37,654 INFO  L479      AbstractCegarLoop]: Abstraction has 46 states and 113 transitions.
[2020-04-17 18:46:37,654 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-04-17 18:46:37,655 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions.
[2020-04-17 18:46:37,658 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-04-17 18:46:37,658 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:37,658 INFO  L425         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:37,862 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:37,863 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:37,863 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:37,863 INFO  L82        PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times
[2020-04-17 18:46:37,864 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:37,864 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269410082]
[2020-04-17 18:46:37,864 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:37,873 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:37,935 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:37,936 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269410082]
[2020-04-17 18:46:37,936 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385958945]
[2020-04-17 18:46:37,936 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:37,994 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:46:37,995 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:37,995 INFO  L264         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-04-17 18:46:37,996 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:38,017 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:38,026 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:38,026 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:38,027 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8
[2020-04-17 18:46:38,027 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909199719]
[2020-04-17 18:46:38,027 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-04-17 18:46:38,028 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:38,028 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-04-17 18:46:38,029 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2020-04-17 18:46:38,029 INFO  L87              Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states.
[2020-04-17 18:46:38,206 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:38,207 INFO  L93              Difference]: Finished difference Result 54 states and 133 transitions.
[2020-04-17 18:46:38,207 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-04-17 18:46:38,207 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 13
[2020-04-17 18:46:38,208 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:38,208 INFO  L225             Difference]: With dead ends: 54
[2020-04-17 18:46:38,208 INFO  L226             Difference]: Without dead ends: 49
[2020-04-17 18:46:38,209 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:46:38,210 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 49 states.
[2020-04-17 18:46:38,212 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38.
[2020-04-17 18:46:38,213 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-04-17 18:46:38,213 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions.
[2020-04-17 18:46:38,213 INFO  L78                 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13
[2020-04-17 18:46:38,213 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:38,214 INFO  L479      AbstractCegarLoop]: Abstraction has 38 states and 92 transitions.
[2020-04-17 18:46:38,214 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-04-17 18:46:38,214 INFO  L276                IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions.
[2020-04-17 18:46:38,214 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-04-17 18:46:38,214 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:38,214 INFO  L425         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:38,418 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:38,418 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:38,419 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:38,419 INFO  L82        PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times
[2020-04-17 18:46:38,419 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:38,420 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327635412]
[2020-04-17 18:46:38,420 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:38,427 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:38,493 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:38,494 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327635412]
[2020-04-17 18:46:38,494 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129809421]
[2020-04-17 18:46:38,494 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:38,543 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2020-04-17 18:46:38,543 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:38,544 INFO  L264         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-04-17 18:46:38,546 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:38,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:38,557 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:38,558 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7
[2020-04-17 18:46:38,558 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074573156]
[2020-04-17 18:46:38,559 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-04-17 18:46:38,559 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:38,559 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-04-17 18:46:38,560 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2020-04-17 18:46:38,560 INFO  L87              Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states.
[2020-04-17 18:46:38,668 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:38,669 INFO  L93              Difference]: Finished difference Result 60 states and 139 transitions.
[2020-04-17 18:46:38,669 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-04-17 18:46:38,669 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 13
[2020-04-17 18:46:38,669 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:38,670 INFO  L225             Difference]: With dead ends: 60
[2020-04-17 18:46:38,670 INFO  L226             Difference]: Without dead ends: 54
[2020-04-17 18:46:38,670 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:46:38,672 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2020-04-17 18:46:38,675 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46.
[2020-04-17 18:46:38,676 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-04-17 18:46:38,676 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions.
[2020-04-17 18:46:38,676 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13
[2020-04-17 18:46:38,676 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:38,676 INFO  L479      AbstractCegarLoop]: Abstraction has 46 states and 111 transitions.
[2020-04-17 18:46:38,677 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-04-17 18:46:38,677 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions.
[2020-04-17 18:46:38,677 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-04-17 18:46:38,677 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:38,677 INFO  L425         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:38,881 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:38,882 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:38,882 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:38,882 INFO  L82        PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times
[2020-04-17 18:46:38,883 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:38,883 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456517971]
[2020-04-17 18:46:38,883 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:38,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:38,959 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:38,959 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456517971]
[2020-04-17 18:46:38,960 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221715744]
[2020-04-17 18:46:38,960 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:39,008 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:46:39,008 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:39,009 INFO  L264         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-04-17 18:46:39,010 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:39,023 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:39,030 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:39,030 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:39,031 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8
[2020-04-17 18:46:39,031 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502940657]
[2020-04-17 18:46:39,031 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-04-17 18:46:39,031 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:39,032 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-04-17 18:46:39,032 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2020-04-17 18:46:39,032 INFO  L87              Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states.
[2020-04-17 18:46:39,166 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:39,166 INFO  L93              Difference]: Finished difference Result 66 states and 151 transitions.
[2020-04-17 18:46:39,167 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-04-17 18:46:39,167 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 13
[2020-04-17 18:46:39,167 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:39,168 INFO  L225             Difference]: With dead ends: 66
[2020-04-17 18:46:39,168 INFO  L226             Difference]: Without dead ends: 60
[2020-04-17 18:46:39,169 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:46:39,171 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2020-04-17 18:46:39,173 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44.
[2020-04-17 18:46:39,174 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 44 states.
[2020-04-17 18:46:39,174 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions.
[2020-04-17 18:46:39,174 INFO  L78                 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13
[2020-04-17 18:46:39,174 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:39,175 INFO  L479      AbstractCegarLoop]: Abstraction has 44 states and 107 transitions.
[2020-04-17 18:46:39,175 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-04-17 18:46:39,175 INFO  L276                IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions.
[2020-04-17 18:46:39,177 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-04-17 18:46:39,177 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:39,177 INFO  L425         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:39,380 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:39,381 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:39,381 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:39,381 INFO  L82        PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times
[2020-04-17 18:46:39,382 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:39,382 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748579067]
[2020-04-17 18:46:39,383 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:39,390 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:39,458 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:39,459 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748579067]
[2020-04-17 18:46:39,459 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067564444]
[2020-04-17 18:46:39,459 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:39,510 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2020-04-17 18:46:39,510 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:39,511 INFO  L264         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-04-17 18:46:39,512 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:39,522 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:39,522 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:39,522 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7
[2020-04-17 18:46:39,522 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039915501]
[2020-04-17 18:46:39,523 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-04-17 18:46:39,523 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:39,523 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-04-17 18:46:39,523 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-04-17 18:46:39,523 INFO  L87              Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states.
[2020-04-17 18:46:39,687 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:39,687 INFO  L93              Difference]: Finished difference Result 67 states and 155 transitions.
[2020-04-17 18:46:39,688 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-04-17 18:46:39,688 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 13
[2020-04-17 18:46:39,688 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:39,688 INFO  L225             Difference]: With dead ends: 67
[2020-04-17 18:46:39,689 INFO  L226             Difference]: Without dead ends: 61
[2020-04-17 18:46:39,689 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:46:39,689 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2020-04-17 18:46:39,691 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47.
[2020-04-17 18:46:39,691 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 47 states.
[2020-04-17 18:46:39,692 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions.
[2020-04-17 18:46:39,692 INFO  L78                 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13
[2020-04-17 18:46:39,692 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:39,692 INFO  L479      AbstractCegarLoop]: Abstraction has 47 states and 115 transitions.
[2020-04-17 18:46:39,692 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-04-17 18:46:39,692 INFO  L276                IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions.
[2020-04-17 18:46:39,693 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-04-17 18:46:39,693 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:39,693 INFO  L425         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:39,893 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:39,894 INFO  L427      AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:39,894 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:39,895 INFO  L82        PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times
[2020-04-17 18:46:39,895 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:39,896 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621158231]
[2020-04-17 18:46:39,896 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:39,903 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:39,961 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:39,961 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621158231]
[2020-04-17 18:46:39,961 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519882384]
[2020-04-17 18:46:39,962 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:40,008 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s)
[2020-04-17 18:46:40,009 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:40,010 INFO  L264         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-04-17 18:46:40,011 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:40,032 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:40,039 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:40,039 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:40,040 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8
[2020-04-17 18:46:40,040 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689372080]
[2020-04-17 18:46:40,040 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-04-17 18:46:40,040 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:40,040 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-04-17 18:46:40,040 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2020-04-17 18:46:40,041 INFO  L87              Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states.
[2020-04-17 18:46:40,234 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:40,234 INFO  L93              Difference]: Finished difference Result 69 states and 159 transitions.
[2020-04-17 18:46:40,240 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-04-17 18:46:40,240 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 13
[2020-04-17 18:46:40,241 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:40,241 INFO  L225             Difference]: With dead ends: 69
[2020-04-17 18:46:40,241 INFO  L226             Difference]: Without dead ends: 63
[2020-04-17 18:46:40,242 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:46:40,242 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63 states.
[2020-04-17 18:46:40,244 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46.
[2020-04-17 18:46:40,244 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-04-17 18:46:40,244 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions.
[2020-04-17 18:46:40,244 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13
[2020-04-17 18:46:40,245 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:40,245 INFO  L479      AbstractCegarLoop]: Abstraction has 46 states and 113 transitions.
[2020-04-17 18:46:40,245 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-04-17 18:46:40,245 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions.
[2020-04-17 18:46:40,245 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-04-17 18:46:40,245 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:40,245 INFO  L425         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:40,449 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:40,449 INFO  L427      AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:40,449 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:40,449 INFO  L82        PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times
[2020-04-17 18:46:40,449 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:40,450 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873214499]
[2020-04-17 18:46:40,450 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:40,456 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:40,498 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:40,499 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873214499]
[2020-04-17 18:46:40,499 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346440124]
[2020-04-17 18:46:40,499 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:40,553 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:40,554 INFO  L264         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-04-17 18:46:40,556 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:40,573 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:40,573 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:40,574 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7
[2020-04-17 18:46:40,574 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809418853]
[2020-04-17 18:46:40,574 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-04-17 18:46:40,574 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:40,575 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-04-17 18:46:40,575 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72
[2020-04-17 18:46:40,575 INFO  L87              Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states.
[2020-04-17 18:46:40,771 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:40,771 INFO  L93              Difference]: Finished difference Result 88 states and 207 transitions.
[2020-04-17 18:46:40,772 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-04-17 18:46:40,772 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 13
[2020-04-17 18:46:40,772 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:40,773 INFO  L225             Difference]: With dead ends: 88
[2020-04-17 18:46:40,773 INFO  L226             Difference]: Without dead ends: 82
[2020-04-17 18:46:40,773 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:46:40,774 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2020-04-17 18:46:40,776 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52.
[2020-04-17 18:46:40,776 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-04-17 18:46:40,777 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions.
[2020-04-17 18:46:40,777 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13
[2020-04-17 18:46:40,777 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:40,777 INFO  L479      AbstractCegarLoop]: Abstraction has 52 states and 133 transitions.
[2020-04-17 18:46:40,777 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-04-17 18:46:40,777 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions.
[2020-04-17 18:46:40,778 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-04-17 18:46:40,778 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:40,778 INFO  L425         BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:40,978 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:40,979 INFO  L427      AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:40,979 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:40,980 INFO  L82        PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times
[2020-04-17 18:46:40,980 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:40,980 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775583376]
[2020-04-17 18:46:40,981 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:41,001 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:41,061 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:41,061 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775583376]
[2020-04-17 18:46:41,062 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921942311]
[2020-04-17 18:46:41,062 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:41,111 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:46:41,111 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:41,112 INFO  L264         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-04-17 18:46:41,114 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:41,137 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:41,138 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:41,138 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8
[2020-04-17 18:46:41,138 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135881769]
[2020-04-17 18:46:41,138 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-04-17 18:46:41,139 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:41,139 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-04-17 18:46:41,139 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2020-04-17 18:46:41,139 INFO  L87              Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states.
[2020-04-17 18:46:41,375 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:41,375 INFO  L93              Difference]: Finished difference Result 69 states and 163 transitions.
[2020-04-17 18:46:41,376 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-04-17 18:46:41,376 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 13
[2020-04-17 18:46:41,376 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:41,377 INFO  L225             Difference]: With dead ends: 69
[2020-04-17 18:46:41,377 INFO  L226             Difference]: Without dead ends: 61
[2020-04-17 18:46:41,377 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:46:41,378 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2020-04-17 18:46:41,382 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49.
[2020-04-17 18:46:41,382 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 49 states.
[2020-04-17 18:46:41,383 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions.
[2020-04-17 18:46:41,383 INFO  L78                 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13
[2020-04-17 18:46:41,383 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:41,383 INFO  L479      AbstractCegarLoop]: Abstraction has 49 states and 121 transitions.
[2020-04-17 18:46:41,383 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-04-17 18:46:41,383 INFO  L276                IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions.
[2020-04-17 18:46:41,385 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-04-17 18:46:41,385 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:41,385 INFO  L425         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:41,589 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:41,589 INFO  L427      AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:41,590 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:41,590 INFO  L82        PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times
[2020-04-17 18:46:41,590 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:41,591 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348094828]
[2020-04-17 18:46:41,591 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:41,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:41,687 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:41,688 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348094828]
[2020-04-17 18:46:41,688 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142990395]
[2020-04-17 18:46:41,688 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:41,738 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2020-04-17 18:46:41,738 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:41,739 INFO  L264         TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-04-17 18:46:41,739 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:41,751 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:41,752 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:41,752 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2020-04-17 18:46:41,752 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137734863]
[2020-04-17 18:46:41,752 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-04-17 18:46:41,753 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:41,753 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-04-17 18:46:41,753 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2020-04-17 18:46:41,753 INFO  L87              Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states.
[2020-04-17 18:46:41,881 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:41,881 INFO  L93              Difference]: Finished difference Result 74 states and 171 transitions.
[2020-04-17 18:46:41,881 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-04-17 18:46:41,881 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 14
[2020-04-17 18:46:41,882 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:41,882 INFO  L225             Difference]: With dead ends: 74
[2020-04-17 18:46:41,882 INFO  L226             Difference]: Without dead ends: 68
[2020-04-17 18:46:41,883 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:46:41,883 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68 states.
[2020-04-17 18:46:41,885 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51.
[2020-04-17 18:46:41,885 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 51 states.
[2020-04-17 18:46:41,886 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions.
[2020-04-17 18:46:41,886 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14
[2020-04-17 18:46:41,886 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:41,886 INFO  L479      AbstractCegarLoop]: Abstraction has 51 states and 125 transitions.
[2020-04-17 18:46:41,886 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-04-17 18:46:41,887 INFO  L276                IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions.
[2020-04-17 18:46:41,888 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-04-17 18:46:41,888 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:41,889 INFO  L425         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:42,092 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:42,092 INFO  L427      AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:42,093 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:42,093 INFO  L82        PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times
[2020-04-17 18:46:42,093 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:42,093 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304912241]
[2020-04-17 18:46:42,093 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:42,100 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:42,168 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:42,168 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304912241]
[2020-04-17 18:46:42,168 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676379761]
[2020-04-17 18:46:42,168 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:42,211 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:46:42,211 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:42,212 INFO  L264         TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-04-17 18:46:42,213 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:42,236 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:42,243 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:42,243 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:42,243 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2020-04-17 18:46:42,244 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265360993]
[2020-04-17 18:46:42,244 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-04-17 18:46:42,244 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:42,244 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-04-17 18:46:42,245 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-04-17 18:46:42,245 INFO  L87              Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states.
[2020-04-17 18:46:42,439 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:42,439 INFO  L93              Difference]: Finished difference Result 71 states and 165 transitions.
[2020-04-17 18:46:42,440 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-04-17 18:46:42,440 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 14
[2020-04-17 18:46:42,440 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:42,441 INFO  L225             Difference]: With dead ends: 71
[2020-04-17 18:46:42,441 INFO  L226             Difference]: Without dead ends: 65
[2020-04-17 18:46:42,442 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:46:42,442 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 65 states.
[2020-04-17 18:46:42,445 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50.
[2020-04-17 18:46:42,445 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-04-17 18:46:42,445 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions.
[2020-04-17 18:46:42,445 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14
[2020-04-17 18:46:42,446 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:42,446 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 123 transitions.
[2020-04-17 18:46:42,446 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-04-17 18:46:42,446 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions.
[2020-04-17 18:46:42,446 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-04-17 18:46:42,446 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:42,447 INFO  L425         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:42,650 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:42,650 INFO  L427      AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:42,651 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:42,651 INFO  L82        PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times
[2020-04-17 18:46:42,651 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:42,651 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909360445]
[2020-04-17 18:46:42,651 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:42,658 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:42,733 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:42,733 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909360445]
[2020-04-17 18:46:42,733 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43547610]
[2020-04-17 18:46:42,733 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:42,773 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s)
[2020-04-17 18:46:42,773 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:42,774 INFO  L264         TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-04-17 18:46:42,775 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:42,800 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:42,800 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:42,801 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2020-04-17 18:46:42,801 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046153387]
[2020-04-17 18:46:42,801 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-04-17 18:46:42,802 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:42,802 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-04-17 18:46:42,802 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90
[2020-04-17 18:46:42,802 INFO  L87              Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states.
[2020-04-17 18:46:42,960 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:42,960 INFO  L93              Difference]: Finished difference Result 68 states and 159 transitions.
[2020-04-17 18:46:42,960 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-04-17 18:46:42,961 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 14
[2020-04-17 18:46:42,961 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:42,961 INFO  L225             Difference]: With dead ends: 68
[2020-04-17 18:46:42,962 INFO  L226             Difference]: Without dead ends: 62
[2020-04-17 18:46:42,962 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:46:42,963 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 62 states.
[2020-04-17 18:46:42,965 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51.
[2020-04-17 18:46:42,965 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 51 states.
[2020-04-17 18:46:42,965 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions.
[2020-04-17 18:46:42,966 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14
[2020-04-17 18:46:42,966 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:42,966 INFO  L479      AbstractCegarLoop]: Abstraction has 51 states and 125 transitions.
[2020-04-17 18:46:42,966 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-04-17 18:46:42,966 INFO  L276                IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions.
[2020-04-17 18:46:42,966 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-04-17 18:46:42,966 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:42,967 INFO  L425         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:43,169 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:43,170 INFO  L427      AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:43,170 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:43,170 INFO  L82        PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times
[2020-04-17 18:46:43,171 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:43,171 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920673046]
[2020-04-17 18:46:43,171 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:43,178 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:43,238 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:43,239 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920673046]
[2020-04-17 18:46:43,239 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230459721]
[2020-04-17 18:46:43,239 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:43,281 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s)
[2020-04-17 18:46:43,281 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:43,282 INFO  L264         TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-04-17 18:46:43,283 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:43,304 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:43,312 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:43,312 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:43,313 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2020-04-17 18:46:43,313 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900363838]
[2020-04-17 18:46:43,313 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-04-17 18:46:43,313 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:43,313 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-04-17 18:46:43,314 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2020-04-17 18:46:43,314 INFO  L87              Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states.
[2020-04-17 18:46:43,519 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:43,519 INFO  L93              Difference]: Finished difference Result 67 states and 157 transitions.
[2020-04-17 18:46:43,519 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-04-17 18:46:43,519 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 14
[2020-04-17 18:46:43,520 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:43,520 INFO  L225             Difference]: With dead ends: 67
[2020-04-17 18:46:43,520 INFO  L226             Difference]: Without dead ends: 61
[2020-04-17 18:46:43,521 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:46:43,521 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2020-04-17 18:46:43,523 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50.
[2020-04-17 18:46:43,523 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-04-17 18:46:43,523 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions.
[2020-04-17 18:46:43,524 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14
[2020-04-17 18:46:43,524 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:43,524 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 123 transitions.
[2020-04-17 18:46:43,524 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-04-17 18:46:43,524 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions.
[2020-04-17 18:46:43,524 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-04-17 18:46:43,524 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:43,525 INFO  L425         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:43,728 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:43,728 INFO  L427      AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:43,729 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:43,729 INFO  L82        PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times
[2020-04-17 18:46:43,729 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:43,730 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760147399]
[2020-04-17 18:46:43,730 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:43,737 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:43,782 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:43,782 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760147399]
[2020-04-17 18:46:43,782 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369348995]
[2020-04-17 18:46:43,783 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:43,829 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:43,830 INFO  L264         TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-04-17 18:46:43,831 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:43,840 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:43,840 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:43,840 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8
[2020-04-17 18:46:43,841 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666913930]
[2020-04-17 18:46:43,841 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-04-17 18:46:43,841 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:43,842 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-04-17 18:46:43,842 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90
[2020-04-17 18:46:43,842 INFO  L87              Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states.
[2020-04-17 18:46:44,071 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:44,071 INFO  L93              Difference]: Finished difference Result 83 states and 197 transitions.
[2020-04-17 18:46:44,071 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-04-17 18:46:44,071 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 14
[2020-04-17 18:46:44,072 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:44,073 INFO  L225             Difference]: With dead ends: 83
[2020-04-17 18:46:44,073 INFO  L226             Difference]: Without dead ends: 77
[2020-04-17 18:46:44,074 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:46:44,074 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2020-04-17 18:46:44,077 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54.
[2020-04-17 18:46:44,077 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-04-17 18:46:44,077 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions.
[2020-04-17 18:46:44,078 INFO  L78                 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14
[2020-04-17 18:46:44,078 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:44,078 INFO  L479      AbstractCegarLoop]: Abstraction has 54 states and 137 transitions.
[2020-04-17 18:46:44,078 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-04-17 18:46:44,078 INFO  L276                IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions.
[2020-04-17 18:46:44,078 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-04-17 18:46:44,079 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:44,079 INFO  L425         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:44,281 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:44,282 INFO  L427      AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:44,282 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:44,283 INFO  L82        PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times
[2020-04-17 18:46:44,283 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:44,283 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036020999]
[2020-04-17 18:46:44,283 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:44,290 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:44,345 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:44,346 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036020999]
[2020-04-17 18:46:44,346 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896445068]
[2020-04-17 18:46:44,346 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:44,401 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:46:44,401 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:44,402 INFO  L264         TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-04-17 18:46:44,403 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:44,428 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:44,441 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:44,441 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:44,441 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2020-04-17 18:46:44,442 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261434915]
[2020-04-17 18:46:44,442 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-04-17 18:46:44,442 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:44,443 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-04-17 18:46:44,443 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2020-04-17 18:46:44,443 INFO  L87              Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states.
[2020-04-17 18:46:44,835 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:44,835 INFO  L93              Difference]: Finished difference Result 64 states and 153 transitions.
[2020-04-17 18:46:44,836 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-04-17 18:46:44,836 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 14
[2020-04-17 18:46:44,836 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:44,837 INFO  L225             Difference]: With dead ends: 64
[2020-04-17 18:46:44,837 INFO  L226             Difference]: Without dead ends: 56
[2020-04-17 18:46:44,838 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:46:44,838 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 56 states.
[2020-04-17 18:46:44,840 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41.
[2020-04-17 18:46:44,840 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2020-04-17 18:46:44,841 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions.
[2020-04-17 18:46:44,841 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14
[2020-04-17 18:46:44,841 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:44,841 INFO  L479      AbstractCegarLoop]: Abstraction has 41 states and 98 transitions.
[2020-04-17 18:46:44,841 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-04-17 18:46:44,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions.
[2020-04-17 18:46:44,842 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-04-17 18:46:44,842 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:44,842 INFO  L425         BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:45,047 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:45,047 INFO  L427      AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:45,048 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:45,048 INFO  L82        PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times
[2020-04-17 18:46:45,048 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:45,048 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827808274]
[2020-04-17 18:46:45,048 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:45,055 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:45,116 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:45,116 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827808274]
[2020-04-17 18:46:45,116 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713205340]
[2020-04-17 18:46:45,116 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:45,159 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s)
[2020-04-17 18:46:45,160 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:45,160 INFO  L264         TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-04-17 18:46:45,161 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:45,173 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:45,182 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:45,182 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:45,182 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9
[2020-04-17 18:46:45,182 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616109700]
[2020-04-17 18:46:45,183 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-04-17 18:46:45,183 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:45,183 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-04-17 18:46:45,183 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2020-04-17 18:46:45,183 INFO  L87              Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states.
[2020-04-17 18:46:45,455 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:45,455 INFO  L93              Difference]: Finished difference Result 68 states and 163 transitions.
[2020-04-17 18:46:45,455 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-04-17 18:46:45,455 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 14
[2020-04-17 18:46:45,456 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:45,456 INFO  L225             Difference]: With dead ends: 68
[2020-04-17 18:46:45,456 INFO  L226             Difference]: Without dead ends: 63
[2020-04-17 18:46:45,457 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:46:45,458 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 63 states.
[2020-04-17 18:46:45,459 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52.
[2020-04-17 18:46:45,460 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-04-17 18:46:45,460 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions.
[2020-04-17 18:46:45,460 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14
[2020-04-17 18:46:45,460 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:45,460 INFO  L479      AbstractCegarLoop]: Abstraction has 52 states and 129 transitions.
[2020-04-17 18:46:45,461 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-04-17 18:46:45,461 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions.
[2020-04-17 18:46:45,461 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-04-17 18:46:45,461 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:45,461 INFO  L425         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:45,664 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:45,665 INFO  L427      AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:45,665 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:45,665 INFO  L82        PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times
[2020-04-17 18:46:45,665 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:45,665 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17855109]
[2020-04-17 18:46:45,666 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:45,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:45,734 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:45,734 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17855109]
[2020-04-17 18:46:45,734 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396994418]
[2020-04-17 18:46:45,734 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:45,778 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:46:45,778 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:45,779 INFO  L264         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-04-17 18:46:45,779 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:45,797 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:45,807 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:45,807 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:45,807 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10
[2020-04-17 18:46:45,807 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002341080]
[2020-04-17 18:46:45,808 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-04-17 18:46:45,808 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:45,808 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-04-17 18:46:45,808 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:45,808 INFO  L87              Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states.
[2020-04-17 18:46:46,097 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:46,097 INFO  L93              Difference]: Finished difference Result 60 states and 149 transitions.
[2020-04-17 18:46:46,102 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-04-17 18:46:46,102 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 15
[2020-04-17 18:46:46,102 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:46,103 INFO  L225             Difference]: With dead ends: 60
[2020-04-17 18:46:46,103 INFO  L226             Difference]: Without dead ends: 55
[2020-04-17 18:46:46,105 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600
[2020-04-17 18:46:46,106 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2020-04-17 18:46:46,107 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42.
[2020-04-17 18:46:46,107 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-04-17 18:46:46,107 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions.
[2020-04-17 18:46:46,108 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15
[2020-04-17 18:46:46,109 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:46,109 INFO  L479      AbstractCegarLoop]: Abstraction has 42 states and 102 transitions.
[2020-04-17 18:46:46,109 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-04-17 18:46:46,109 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions.
[2020-04-17 18:46:46,110 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-04-17 18:46:46,110 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:46,110 INFO  L425         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:46,313 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:46,313 INFO  L427      AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:46,314 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:46,314 INFO  L82        PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times
[2020-04-17 18:46:46,314 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:46,314 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369107991]
[2020-04-17 18:46:46,315 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:46,321 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:46,397 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:46,397 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369107991]
[2020-04-17 18:46:46,398 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437471022]
[2020-04-17 18:46:46,398 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:46,442 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2020-04-17 18:46:46,443 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:46,444 INFO  L264         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-04-17 18:46:46,444 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:46,450 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:46,450 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:46,450 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9
[2020-04-17 18:46:46,451 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802574938]
[2020-04-17 18:46:46,451 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-04-17 18:46:46,451 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:46,451 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-04-17 18:46:46,452 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110
[2020-04-17 18:46:46,452 INFO  L87              Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states.
[2020-04-17 18:46:46,581 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:46,581 INFO  L93              Difference]: Finished difference Result 66 states and 153 transitions.
[2020-04-17 18:46:46,581 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-04-17 18:46:46,582 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 15
[2020-04-17 18:46:46,582 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:46,583 INFO  L225             Difference]: With dead ends: 66
[2020-04-17 18:46:46,583 INFO  L226             Difference]: Without dead ends: 60
[2020-04-17 18:46:46,584 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:46:46,584 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60 states.
[2020-04-17 18:46:46,585 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50.
[2020-04-17 18:46:46,586 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-04-17 18:46:46,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions.
[2020-04-17 18:46:46,586 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15
[2020-04-17 18:46:46,586 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:46,586 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 121 transitions.
[2020-04-17 18:46:46,587 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-04-17 18:46:46,587 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions.
[2020-04-17 18:46:46,587 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-04-17 18:46:46,587 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:46,587 INFO  L425         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:46,790 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:46,791 INFO  L427      AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:46,791 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:46,791 INFO  L82        PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times
[2020-04-17 18:46:46,791 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:46,792 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259471969]
[2020-04-17 18:46:46,792 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:46,799 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:46,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:46,934 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259471969]
[2020-04-17 18:46:46,934 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043667775]
[2020-04-17 18:46:46,935 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:47,013 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2020-04-17 18:46:47,013 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:47,014 INFO  L264         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-04-17 18:46:47,016 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:47,031 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:47,043 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:47,043 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:47,043 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10
[2020-04-17 18:46:47,043 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342523932]
[2020-04-17 18:46:47,044 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-04-17 18:46:47,044 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:47,044 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-04-17 18:46:47,044 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:47,044 INFO  L87              Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states.
[2020-04-17 18:46:47,285 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:47,285 INFO  L93              Difference]: Finished difference Result 74 states and 169 transitions.
[2020-04-17 18:46:47,285 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-04-17 18:46:47,286 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 15
[2020-04-17 18:46:47,286 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:47,286 INFO  L225             Difference]: With dead ends: 74
[2020-04-17 18:46:47,286 INFO  L226             Difference]: Without dead ends: 68
[2020-04-17 18:46:47,287 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:46:47,287 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68 states.
[2020-04-17 18:46:47,289 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48.
[2020-04-17 18:46:47,289 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2020-04-17 18:46:47,289 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions.
[2020-04-17 18:46:47,289 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15
[2020-04-17 18:46:47,289 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:47,290 INFO  L479      AbstractCegarLoop]: Abstraction has 48 states and 117 transitions.
[2020-04-17 18:46:47,290 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-04-17 18:46:47,290 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions.
[2020-04-17 18:46:47,290 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-04-17 18:46:47,290 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:47,290 INFO  L425         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:47,494 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:47,495 INFO  L427      AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:47,495 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:47,495 INFO  L82        PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times
[2020-04-17 18:46:47,495 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:47,496 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320015765]
[2020-04-17 18:46:47,496 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:47,501 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:47,612 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:47,613 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320015765]
[2020-04-17 18:46:47,613 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433916938]
[2020-04-17 18:46:47,613 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:47,661 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:47,662 INFO  L264         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-04-17 18:46:47,663 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:47,672 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:47,673 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:47,673 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9
[2020-04-17 18:46:47,673 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154096070]
[2020-04-17 18:46:47,674 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-04-17 18:46:47,674 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:47,674 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-04-17 18:46:47,674 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2020-04-17 18:46:47,674 INFO  L87              Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states.
[2020-04-17 18:46:47,861 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:47,862 INFO  L93              Difference]: Finished difference Result 75 states and 173 transitions.
[2020-04-17 18:46:47,862 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-04-17 18:46:47,862 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 15
[2020-04-17 18:46:47,863 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:47,863 INFO  L225             Difference]: With dead ends: 75
[2020-04-17 18:46:47,864 INFO  L226             Difference]: Without dead ends: 69
[2020-04-17 18:46:47,864 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:46:47,864 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2020-04-17 18:46:47,866 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51.
[2020-04-17 18:46:47,866 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 51 states.
[2020-04-17 18:46:47,866 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions.
[2020-04-17 18:46:47,866 INFO  L78                 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15
[2020-04-17 18:46:47,867 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:47,867 INFO  L479      AbstractCegarLoop]: Abstraction has 51 states and 125 transitions.
[2020-04-17 18:46:47,867 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-04-17 18:46:47,867 INFO  L276                IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions.
[2020-04-17 18:46:47,867 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-04-17 18:46:47,867 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:47,867 INFO  L425         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:48,071 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:48,072 INFO  L427      AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:48,072 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:48,072 INFO  L82        PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times
[2020-04-17 18:46:48,072 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:48,073 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898944327]
[2020-04-17 18:46:48,073 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:48,090 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:48,163 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:48,164 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898944327]
[2020-04-17 18:46:48,164 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045874737]
[2020-04-17 18:46:48,164 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:48,208 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:46:48,208 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:48,209 INFO  L264         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-04-17 18:46:48,210 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:48,228 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:48,235 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:48,235 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:48,235 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10
[2020-04-17 18:46:48,236 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859963305]
[2020-04-17 18:46:48,236 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-04-17 18:46:48,236 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:48,236 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-04-17 18:46:48,236 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:48,236 INFO  L87              Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states.
[2020-04-17 18:46:48,463 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:48,463 INFO  L93              Difference]: Finished difference Result 79 states and 181 transitions.
[2020-04-17 18:46:48,463 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-04-17 18:46:48,463 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 15
[2020-04-17 18:46:48,464 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:48,464 INFO  L225             Difference]: With dead ends: 79
[2020-04-17 18:46:48,464 INFO  L226             Difference]: Without dead ends: 73
[2020-04-17 18:46:48,464 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:46:48,465 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2020-04-17 18:46:48,466 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50.
[2020-04-17 18:46:48,466 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-04-17 18:46:48,466 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions.
[2020-04-17 18:46:48,466 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15
[2020-04-17 18:46:48,466 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:48,466 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 123 transitions.
[2020-04-17 18:46:48,466 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-04-17 18:46:48,466 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions.
[2020-04-17 18:46:48,467 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-04-17 18:46:48,467 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:48,467 INFO  L425         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:48,667 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:48,667 INFO  L427      AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:48,668 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:48,668 INFO  L82        PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times
[2020-04-17 18:46:48,668 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:48,668 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973287343]
[2020-04-17 18:46:48,669 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:48,674 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:48,745 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:48,745 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973287343]
[2020-04-17 18:46:48,746 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142324139]
[2020-04-17 18:46:48,746 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:48,797 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2020-04-17 18:46:48,797 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:48,798 INFO  L264         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-04-17 18:46:48,803 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:48,814 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:48,814 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:48,814 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9
[2020-04-17 18:46:48,815 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112776019]
[2020-04-17 18:46:48,815 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-04-17 18:46:48,816 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:48,816 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-04-17 18:46:48,816 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110
[2020-04-17 18:46:48,816 INFO  L87              Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states.
[2020-04-17 18:46:49,053 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:49,053 INFO  L93              Difference]: Finished difference Result 79 states and 183 transitions.
[2020-04-17 18:46:49,054 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-04-17 18:46:49,054 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 15
[2020-04-17 18:46:49,054 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:49,055 INFO  L225             Difference]: With dead ends: 79
[2020-04-17 18:46:49,055 INFO  L226             Difference]: Without dead ends: 73
[2020-04-17 18:46:49,055 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:46:49,055 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2020-04-17 18:46:49,057 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53.
[2020-04-17 18:46:49,057 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 53 states.
[2020-04-17 18:46:49,058 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions.
[2020-04-17 18:46:49,058 INFO  L78                 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15
[2020-04-17 18:46:49,058 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:49,058 INFO  L479      AbstractCegarLoop]: Abstraction has 53 states and 131 transitions.
[2020-04-17 18:46:49,058 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-04-17 18:46:49,058 INFO  L276                IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions.
[2020-04-17 18:46:49,059 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-04-17 18:46:49,059 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:49,059 INFO  L425         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:49,262 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:49,263 INFO  L427      AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:49,263 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:49,263 INFO  L82        PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times
[2020-04-17 18:46:49,263 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:49,264 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444984643]
[2020-04-17 18:46:49,264 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:49,277 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:49,379 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:49,380 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444984643]
[2020-04-17 18:46:49,380 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250568453]
[2020-04-17 18:46:49,380 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:49,446 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:46:49,446 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:49,447 INFO  L264         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-04-17 18:46:49,449 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:49,472 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:49,484 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:49,485 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:49,485 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10
[2020-04-17 18:46:49,485 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718820223]
[2020-04-17 18:46:49,486 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-04-17 18:46:49,486 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:49,486 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-04-17 18:46:49,486 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:49,487 INFO  L87              Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states.
[2020-04-17 18:46:49,910 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:49,910 INFO  L93              Difference]: Finished difference Result 76 states and 177 transitions.
[2020-04-17 18:46:49,911 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-04-17 18:46:49,911 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 15
[2020-04-17 18:46:49,911 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:49,912 INFO  L225             Difference]: With dead ends: 76
[2020-04-17 18:46:49,912 INFO  L226             Difference]: Without dead ends: 70
[2020-04-17 18:46:49,913 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600
[2020-04-17 18:46:49,914 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 70 states.
[2020-04-17 18:46:49,916 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52.
[2020-04-17 18:46:49,916 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-04-17 18:46:49,916 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions.
[2020-04-17 18:46:49,917 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15
[2020-04-17 18:46:49,917 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:49,917 INFO  L479      AbstractCegarLoop]: Abstraction has 52 states and 129 transitions.
[2020-04-17 18:46:49,917 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-04-17 18:46:49,917 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions.
[2020-04-17 18:46:49,918 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-04-17 18:46:49,918 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:49,918 INFO  L425         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:50,123 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:50,123 INFO  L427      AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:50,123 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:50,123 INFO  L82        PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times
[2020-04-17 18:46:50,123 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:50,124 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649572155]
[2020-04-17 18:46:50,124 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:50,129 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:50,212 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:50,212 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649572155]
[2020-04-17 18:46:50,212 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901221960]
[2020-04-17 18:46:50,212 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:50,255 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2020-04-17 18:46:50,255 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:50,256 INFO  L264         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-04-17 18:46:50,257 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:50,273 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:50,273 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:50,273 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9
[2020-04-17 18:46:50,274 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798509794]
[2020-04-17 18:46:50,274 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-04-17 18:46:50,274 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:50,274 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-04-17 18:46:50,274 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110
[2020-04-17 18:46:50,274 INFO  L87              Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states.
[2020-04-17 18:46:50,551 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:50,551 INFO  L93              Difference]: Finished difference Result 96 states and 227 transitions.
[2020-04-17 18:46:50,554 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:46:50,554 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 15
[2020-04-17 18:46:50,555 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:50,555 INFO  L225             Difference]: With dead ends: 96
[2020-04-17 18:46:50,555 INFO  L226             Difference]: Without dead ends: 90
[2020-04-17 18:46:50,556 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650
[2020-04-17 18:46:50,556 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2020-04-17 18:46:50,559 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58.
[2020-04-17 18:46:50,559 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-04-17 18:46:50,559 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions.
[2020-04-17 18:46:50,559 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15
[2020-04-17 18:46:50,559 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:50,559 INFO  L479      AbstractCegarLoop]: Abstraction has 58 states and 149 transitions.
[2020-04-17 18:46:50,560 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-04-17 18:46:50,560 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions.
[2020-04-17 18:46:50,560 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-04-17 18:46:50,560 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:50,560 INFO  L425         BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:50,764 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:50,764 INFO  L427      AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:50,765 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:50,765 INFO  L82        PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times
[2020-04-17 18:46:50,765 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:50,767 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252742813]
[2020-04-17 18:46:50,768 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:50,773 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:50,842 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:50,843 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252742813]
[2020-04-17 18:46:50,843 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38371987]
[2020-04-17 18:46:50,843 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:50,886 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2020-04-17 18:46:50,886 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:50,886 INFO  L264         TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-04-17 18:46:50,887 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:50,910 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:50,910 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:50,910 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10
[2020-04-17 18:46:50,910 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142211679]
[2020-04-17 18:46:50,911 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-04-17 18:46:50,911 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:50,911 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-04-17 18:46:50,911 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:50,911 INFO  L87              Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states.
[2020-04-17 18:46:51,257 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:51,258 INFO  L93              Difference]: Finished difference Result 77 states and 183 transitions.
[2020-04-17 18:46:51,258 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-04-17 18:46:51,258 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 15
[2020-04-17 18:46:51,258 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:51,259 INFO  L225             Difference]: With dead ends: 77
[2020-04-17 18:46:51,259 INFO  L226             Difference]: Without dead ends: 69
[2020-04-17 18:46:51,260 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702
[2020-04-17 18:46:51,260 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2020-04-17 18:46:51,262 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55.
[2020-04-17 18:46:51,262 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-04-17 18:46:51,262 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions.
[2020-04-17 18:46:51,263 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15
[2020-04-17 18:46:51,263 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:51,263 INFO  L479      AbstractCegarLoop]: Abstraction has 55 states and 137 transitions.
[2020-04-17 18:46:51,263 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-04-17 18:46:51,263 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions.
[2020-04-17 18:46:51,264 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-04-17 18:46:51,264 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:51,264 INFO  L425         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:51,467 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:51,467 INFO  L427      AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:51,468 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:51,468 INFO  L82        PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times
[2020-04-17 18:46:51,468 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:51,468 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481340357]
[2020-04-17 18:46:51,469 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:51,475 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:51,560 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:51,561 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481340357]
[2020-04-17 18:46:51,561 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349891542]
[2020-04-17 18:46:51,561 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:51,605 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:51,606 INFO  L264         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-04-17 18:46:51,607 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:51,627 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:51,627 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:51,628 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10
[2020-04-17 18:46:51,628 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343754605]
[2020-04-17 18:46:51,628 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-04-17 18:46:51,628 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:51,628 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-04-17 18:46:51,629 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:51,629 INFO  L87              Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states.
[2020-04-17 18:46:51,786 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:51,786 INFO  L93              Difference]: Finished difference Result 84 states and 195 transitions.
[2020-04-17 18:46:51,786 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-04-17 18:46:51,787 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 16
[2020-04-17 18:46:51,787 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:51,787 INFO  L225             Difference]: With dead ends: 84
[2020-04-17 18:46:51,788 INFO  L226             Difference]: Without dead ends: 78
[2020-04-17 18:46:51,788 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:46:51,788 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-04-17 18:46:51,790 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57.
[2020-04-17 18:46:51,790 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2020-04-17 18:46:51,790 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions.
[2020-04-17 18:46:51,790 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16
[2020-04-17 18:46:51,790 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:51,791 INFO  L479      AbstractCegarLoop]: Abstraction has 57 states and 141 transitions.
[2020-04-17 18:46:51,791 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-04-17 18:46:51,791 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions.
[2020-04-17 18:46:51,791 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-04-17 18:46:51,791 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:51,791 INFO  L425         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:51,994 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:51,995 INFO  L427      AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:51,995 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:51,995 INFO  L82        PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times
[2020-04-17 18:46:51,996 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:51,996 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465701790]
[2020-04-17 18:46:51,996 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:52,022 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:52,118 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:52,119 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465701790]
[2020-04-17 18:46:52,119 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997225831]
[2020-04-17 18:46:52,119 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:52,166 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:46:52,166 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:52,167 INFO  L264         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-04-17 18:46:52,168 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:52,188 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:52,194 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:52,194 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:52,195 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11
[2020-04-17 18:46:52,195 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381891302]
[2020-04-17 18:46:52,195 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:46:52,195 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:52,195 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:46:52,195 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:52,196 INFO  L87              Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states.
[2020-04-17 18:46:52,434 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:52,434 INFO  L93              Difference]: Finished difference Result 81 states and 189 transitions.
[2020-04-17 18:46:52,434 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-04-17 18:46:52,435 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 16
[2020-04-17 18:46:52,435 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:52,435 INFO  L225             Difference]: With dead ends: 81
[2020-04-17 18:46:52,435 INFO  L226             Difference]: Without dead ends: 75
[2020-04-17 18:46:52,436 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:46:52,436 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 75 states.
[2020-04-17 18:46:52,438 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56.
[2020-04-17 18:46:52,438 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-04-17 18:46:52,439 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions.
[2020-04-17 18:46:52,439 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16
[2020-04-17 18:46:52,439 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:52,439 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 139 transitions.
[2020-04-17 18:46:52,439 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:46:52,439 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions.
[2020-04-17 18:46:52,440 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-04-17 18:46:52,440 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:52,440 INFO  L425         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:52,643 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:52,643 INFO  L427      AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:52,644 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:52,644 INFO  L82        PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times
[2020-04-17 18:46:52,644 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:52,645 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597946994]
[2020-04-17 18:46:52,645 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:52,651 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:52,721 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:52,722 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597946994]
[2020-04-17 18:46:52,722 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025517384]
[2020-04-17 18:46:52,722 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:52,774 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2020-04-17 18:46:52,774 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:52,775 INFO  L264         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-04-17 18:46:52,776 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:52,809 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:52,809 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:52,809 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10
[2020-04-17 18:46:52,810 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180880877]
[2020-04-17 18:46:52,810 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-04-17 18:46:52,811 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:52,811 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-04-17 18:46:52,812 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:52,812 INFO  L87              Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states.
[2020-04-17 18:46:53,022 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:53,022 INFO  L93              Difference]: Finished difference Result 78 states and 183 transitions.
[2020-04-17 18:46:53,022 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-04-17 18:46:53,023 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 16
[2020-04-17 18:46:53,023 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:53,023 INFO  L225             Difference]: With dead ends: 78
[2020-04-17 18:46:53,024 INFO  L226             Difference]: Without dead ends: 72
[2020-04-17 18:46:53,024 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:46:53,024 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-04-17 18:46:53,027 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57.
[2020-04-17 18:46:53,027 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2020-04-17 18:46:53,027 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions.
[2020-04-17 18:46:53,028 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16
[2020-04-17 18:46:53,028 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:53,028 INFO  L479      AbstractCegarLoop]: Abstraction has 57 states and 141 transitions.
[2020-04-17 18:46:53,028 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-04-17 18:46:53,028 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions.
[2020-04-17 18:46:53,028 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-04-17 18:46:53,028 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:53,029 INFO  L425         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:53,231 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:53,232 INFO  L427      AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:53,232 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:53,232 INFO  L82        PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times
[2020-04-17 18:46:53,233 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:53,233 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90554062]
[2020-04-17 18:46:53,233 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:53,239 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:53,338 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:53,338 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90554062]
[2020-04-17 18:46:53,339 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655621497]
[2020-04-17 18:46:53,339 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:53,410 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:46:53,411 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:53,412 INFO  L264         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-04-17 18:46:53,413 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:53,456 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:53,465 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:53,465 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:53,465 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11
[2020-04-17 18:46:53,465 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440850939]
[2020-04-17 18:46:53,466 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:46:53,466 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:53,466 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:46:53,466 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:53,466 INFO  L87              Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states.
[2020-04-17 18:46:53,838 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:53,838 INFO  L93              Difference]: Finished difference Result 77 states and 181 transitions.
[2020-04-17 18:46:53,838 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-04-17 18:46:53,838 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 16
[2020-04-17 18:46:53,838 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:53,839 INFO  L225             Difference]: With dead ends: 77
[2020-04-17 18:46:53,839 INFO  L226             Difference]: Without dead ends: 71
[2020-04-17 18:46:53,840 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650
[2020-04-17 18:46:53,840 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2020-04-17 18:46:53,841 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56.
[2020-04-17 18:46:53,842 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-04-17 18:46:53,843 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions.
[2020-04-17 18:46:53,843 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16
[2020-04-17 18:46:53,843 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:53,843 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 139 transitions.
[2020-04-17 18:46:53,844 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:46:53,844 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions.
[2020-04-17 18:46:53,845 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-04-17 18:46:53,845 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:53,845 INFO  L425         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:54,049 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:54,049 INFO  L427      AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:54,050 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:54,050 INFO  L82        PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times
[2020-04-17 18:46:54,050 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:54,051 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446911733]
[2020-04-17 18:46:54,051 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:54,060 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:54,174 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:54,174 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446911733]
[2020-04-17 18:46:54,174 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711903899]
[2020-04-17 18:46:54,174 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:54,225 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s)
[2020-04-17 18:46:54,225 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:54,226 INFO  L264         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-04-17 18:46:54,229 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:54,253 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:54,253 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:54,254 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10
[2020-04-17 18:46:54,254 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157086741]
[2020-04-17 18:46:54,254 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-04-17 18:46:54,254 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:54,254 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-04-17 18:46:54,254 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:54,255 INFO  L87              Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states.
[2020-04-17 18:46:54,501 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:54,501 INFO  L93              Difference]: Finished difference Result 74 states and 175 transitions.
[2020-04-17 18:46:54,501 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-04-17 18:46:54,501 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 16
[2020-04-17 18:46:54,502 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:54,502 INFO  L225             Difference]: With dead ends: 74
[2020-04-17 18:46:54,502 INFO  L226             Difference]: Without dead ends: 68
[2020-04-17 18:46:54,503 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600
[2020-04-17 18:46:54,503 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68 states.
[2020-04-17 18:46:54,505 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57.
[2020-04-17 18:46:54,505 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2020-04-17 18:46:54,506 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions.
[2020-04-17 18:46:54,506 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16
[2020-04-17 18:46:54,506 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:54,506 INFO  L479      AbstractCegarLoop]: Abstraction has 57 states and 141 transitions.
[2020-04-17 18:46:54,506 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-04-17 18:46:54,506 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions.
[2020-04-17 18:46:54,507 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-04-17 18:46:54,507 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:54,507 INFO  L425         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:54,710 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:54,710 INFO  L427      AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:54,710 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:54,711 INFO  L82        PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times
[2020-04-17 18:46:54,711 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:54,711 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426855909]
[2020-04-17 18:46:54,712 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:54,718 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:54,790 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:54,791 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426855909]
[2020-04-17 18:46:54,791 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549550614]
[2020-04-17 18:46:54,791 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:54,835 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s)
[2020-04-17 18:46:54,836 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:54,837 INFO  L264         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:46:54,837 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:54,872 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:54,873 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:54,873 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11
[2020-04-17 18:46:54,873 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759067647]
[2020-04-17 18:46:54,873 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:46:54,873 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:54,874 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:46:54,874 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:54,874 INFO  L87              Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states.
[2020-04-17 18:46:55,169 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:55,169 INFO  L93              Difference]: Finished difference Result 71 states and 169 transitions.
[2020-04-17 18:46:55,169 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-04-17 18:46:55,169 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 16
[2020-04-17 18:46:55,170 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:55,170 INFO  L225             Difference]: With dead ends: 71
[2020-04-17 18:46:55,170 INFO  L226             Difference]: Without dead ends: 65
[2020-04-17 18:46:55,171 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=470, Unknown=0, NotChecked=0, Total=650
[2020-04-17 18:46:55,171 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 65 states.
[2020-04-17 18:46:55,172 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56.
[2020-04-17 18:46:55,172 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-04-17 18:46:55,173 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions.
[2020-04-17 18:46:55,173 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16
[2020-04-17 18:46:55,174 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:55,174 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 139 transitions.
[2020-04-17 18:46:55,174 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:46:55,174 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions.
[2020-04-17 18:46:55,175 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-04-17 18:46:55,175 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:55,175 INFO  L425         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:55,378 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:55,378 INFO  L427      AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:55,379 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:55,379 INFO  L82        PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times
[2020-04-17 18:46:55,379 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:55,380 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637758776]
[2020-04-17 18:46:55,380 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:55,385 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:55,454 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:55,454 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637758776]
[2020-04-17 18:46:55,454 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718900316]
[2020-04-17 18:46:55,454 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:55,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:55,500 INFO  L264         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-04-17 18:46:55,500 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:55,520 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:55,520 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:55,520 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10
[2020-04-17 18:46:55,521 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996220003]
[2020-04-17 18:46:55,521 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-04-17 18:46:55,521 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:55,521 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-04-17 18:46:55,521 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132
[2020-04-17 18:46:55,521 INFO  L87              Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states.
[2020-04-17 18:46:55,790 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:55,791 INFO  L93              Difference]: Finished difference Result 89 states and 213 transitions.
[2020-04-17 18:46:55,791 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:46:55,791 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 16
[2020-04-17 18:46:55,791 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:55,805 INFO  L225             Difference]: With dead ends: 89
[2020-04-17 18:46:55,806 INFO  L226             Difference]: Without dead ends: 83
[2020-04-17 18:46:55,807 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702
[2020-04-17 18:46:55,807 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2020-04-17 18:46:55,809 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60.
[2020-04-17 18:46:55,809 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 60 states.
[2020-04-17 18:46:55,809 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions.
[2020-04-17 18:46:55,809 INFO  L78                 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16
[2020-04-17 18:46:55,809 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:55,809 INFO  L479      AbstractCegarLoop]: Abstraction has 60 states and 153 transitions.
[2020-04-17 18:46:55,810 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-04-17 18:46:55,810 INFO  L276                IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions.
[2020-04-17 18:46:55,810 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-04-17 18:46:55,810 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:55,810 INFO  L425         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:56,013 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:56,014 INFO  L427      AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:56,014 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:56,014 INFO  L82        PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times
[2020-04-17 18:46:56,015 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:56,015 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732614484]
[2020-04-17 18:46:56,015 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:56,021 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:56,082 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:56,082 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732614484]
[2020-04-17 18:46:56,083 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311427176]
[2020-04-17 18:46:56,083 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:56,132 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:46:56,132 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:56,133 INFO  L264         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-04-17 18:46:56,134 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:56,163 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:56,179 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:56,180 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:56,180 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11
[2020-04-17 18:46:56,180 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180644473]
[2020-04-17 18:46:56,181 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:46:56,181 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:56,181 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:46:56,182 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:56,182 INFO  L87              Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states.
[2020-04-17 18:46:56,720 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:56,720 INFO  L93              Difference]: Finished difference Result 70 states and 169 transitions.
[2020-04-17 18:46:56,721 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-04-17 18:46:56,721 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 16
[2020-04-17 18:46:56,721 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:56,722 INFO  L225             Difference]: With dead ends: 70
[2020-04-17 18:46:56,722 INFO  L226             Difference]: Without dead ends: 62
[2020-04-17 18:46:56,723 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870
[2020-04-17 18:46:56,723 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 62 states.
[2020-04-17 18:46:56,724 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45.
[2020-04-17 18:46:56,725 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-04-17 18:46:56,725 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions.
[2020-04-17 18:46:56,725 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16
[2020-04-17 18:46:56,726 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:56,726 INFO  L479      AbstractCegarLoop]: Abstraction has 45 states and 108 transitions.
[2020-04-17 18:46:56,726 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:46:56,726 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions.
[2020-04-17 18:46:56,727 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-04-17 18:46:56,727 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:56,727 INFO  L425         BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:56,927 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:56,928 INFO  L427      AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:56,928 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:56,928 INFO  L82        PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times
[2020-04-17 18:46:56,928 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:56,928 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356487336]
[2020-04-17 18:46:56,928 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:56,932 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:57,008 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:57,008 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356487336]
[2020-04-17 18:46:57,008 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807160339]
[2020-04-17 18:46:57,009 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:57,054 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s)
[2020-04-17 18:46:57,055 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:57,055 INFO  L264         TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-04-17 18:46:57,056 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:57,075 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:57,085 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:57,085 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:57,086 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11
[2020-04-17 18:46:57,086 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117135120]
[2020-04-17 18:46:57,086 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:46:57,086 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:57,087 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:46:57,087 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:57,087 INFO  L87              Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states.
[2020-04-17 18:46:57,443 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:57,443 INFO  L93              Difference]: Finished difference Result 76 states and 183 transitions.
[2020-04-17 18:46:57,443 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:46:57,443 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 16
[2020-04-17 18:46:57,443 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:57,444 INFO  L225             Difference]: With dead ends: 76
[2020-04-17 18:46:57,444 INFO  L226             Difference]: Without dead ends: 71
[2020-04-17 18:46:57,445 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870
[2020-04-17 18:46:57,445 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 71 states.
[2020-04-17 18:46:57,446 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58.
[2020-04-17 18:46:57,446 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-04-17 18:46:57,447 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions.
[2020-04-17 18:46:57,447 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16
[2020-04-17 18:46:57,447 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:57,447 INFO  L479      AbstractCegarLoop]: Abstraction has 58 states and 145 transitions.
[2020-04-17 18:46:57,447 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:46:57,447 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions.
[2020-04-17 18:46:57,448 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:46:57,448 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:57,448 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:57,651 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:57,652 INFO  L427      AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:57,652 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:57,652 INFO  L82        PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times
[2020-04-17 18:46:57,653 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:57,653 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312049127]
[2020-04-17 18:46:57,653 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:57,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:57,737 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:57,738 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312049127]
[2020-04-17 18:46:57,738 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136522823]
[2020-04-17 18:46:57,738 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:57,782 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:46:57,782 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:57,783 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:46:57,784 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:57,799 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:57,809 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:57,810 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:57,810 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12
[2020-04-17 18:46:57,810 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616660283]
[2020-04-17 18:46:57,810 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:46:57,811 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:57,811 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:46:57,811 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:46:57,811 INFO  L87              Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states.
[2020-04-17 18:46:58,194 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:58,195 INFO  L93              Difference]: Finished difference Result 66 states and 165 transitions.
[2020-04-17 18:46:58,195 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:46:58,195 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 17
[2020-04-17 18:46:58,195 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:58,196 INFO  L225             Difference]: With dead ends: 66
[2020-04-17 18:46:58,196 INFO  L226             Difference]: Without dead ends: 61
[2020-04-17 18:46:58,197 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930
[2020-04-17 18:46:58,197 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61 states.
[2020-04-17 18:46:58,199 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46.
[2020-04-17 18:46:58,199 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-04-17 18:46:58,200 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions.
[2020-04-17 18:46:58,200 INFO  L78                 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17
[2020-04-17 18:46:58,200 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:58,200 INFO  L479      AbstractCegarLoop]: Abstraction has 46 states and 112 transitions.
[2020-04-17 18:46:58,200 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:46:58,200 INFO  L276                IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions.
[2020-04-17 18:46:58,201 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:46:58,201 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:58,201 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:58,404 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:58,404 INFO  L427      AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:58,405 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:58,405 INFO  L82        PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times
[2020-04-17 18:46:58,405 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:58,406 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939672366]
[2020-04-17 18:46:58,406 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:58,411 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:58,526 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:58,526 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939672366]
[2020-04-17 18:46:58,527 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398145136]
[2020-04-17 18:46:58,527 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:58,578 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s)
[2020-04-17 18:46:58,579 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:58,580 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:46:58,580 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:58,588 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:58,588 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:58,589 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11
[2020-04-17 18:46:58,589 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068253881]
[2020-04-17 18:46:58,589 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:46:58,589 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:58,589 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:46:58,590 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:58,590 INFO  L87              Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states.
[2020-04-17 18:46:58,752 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:58,752 INFO  L93              Difference]: Finished difference Result 72 states and 167 transitions.
[2020-04-17 18:46:58,753 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-04-17 18:46:58,753 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 17
[2020-04-17 18:46:58,753 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:58,754 INFO  L225             Difference]: With dead ends: 72
[2020-04-17 18:46:58,754 INFO  L226             Difference]: Without dead ends: 66
[2020-04-17 18:46:58,754 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:46:58,754 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66 states.
[2020-04-17 18:46:58,756 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54.
[2020-04-17 18:46:58,756 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-04-17 18:46:58,757 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions.
[2020-04-17 18:46:58,757 INFO  L78                 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17
[2020-04-17 18:46:58,757 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:58,758 INFO  L479      AbstractCegarLoop]: Abstraction has 54 states and 131 transitions.
[2020-04-17 18:46:58,758 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:46:58,758 INFO  L276                IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions.
[2020-04-17 18:46:58,758 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:46:58,758 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:58,758 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:58,961 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:58,961 INFO  L427      AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:58,962 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:58,962 INFO  L82        PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times
[2020-04-17 18:46:58,962 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:58,963 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318219542]
[2020-04-17 18:46:58,963 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:58,969 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:59,073 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:59,074 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318219542]
[2020-04-17 18:46:59,074 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917249655]
[2020-04-17 18:46:59,074 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:59,146 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s)
[2020-04-17 18:46:59,147 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:46:59,148 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:46:59,149 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:59,166 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:46:59,176 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:59,176 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:59,177 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12
[2020-04-17 18:46:59,177 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833216495]
[2020-04-17 18:46:59,177 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:46:59,177 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:59,178 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:46:59,178 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:46:59,178 INFO  L87              Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states.
[2020-04-17 18:46:59,441 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:46:59,441 INFO  L93              Difference]: Finished difference Result 82 states and 187 transitions.
[2020-04-17 18:46:59,442 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. 
[2020-04-17 18:46:59,442 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 17
[2020-04-17 18:46:59,442 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:46:59,443 INFO  L225             Difference]: With dead ends: 82
[2020-04-17 18:46:59,443 INFO  L226             Difference]: Without dead ends: 76
[2020-04-17 18:46:59,444 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:46:59,444 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 76 states.
[2020-04-17 18:46:59,446 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52.
[2020-04-17 18:46:59,446 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-04-17 18:46:59,447 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions.
[2020-04-17 18:46:59,447 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17
[2020-04-17 18:46:59,447 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:46:59,448 INFO  L479      AbstractCegarLoop]: Abstraction has 52 states and 127 transitions.
[2020-04-17 18:46:59,448 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:46:59,448 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions.
[2020-04-17 18:46:59,448 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:46:59,449 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:46:59,449 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:46:59,656 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:59,657 INFO  L427      AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:46:59,657 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:46:59,657 INFO  L82        PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times
[2020-04-17 18:46:59,657 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:46:59,658 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556036164]
[2020-04-17 18:46:59,658 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:46:59,663 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:59,777 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:59,778 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556036164]
[2020-04-17 18:46:59,778 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038849376]
[2020-04-17 18:46:59,778 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:46:59,821 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:46:59,822 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:46:59,822 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:46:59,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:46:59,829 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:46:59,829 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11
[2020-04-17 18:46:59,829 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187721644]
[2020-04-17 18:46:59,830 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:46:59,830 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:46:59,830 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:46:59,830 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:46:59,830 INFO  L87              Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states.
[2020-04-17 18:47:00,079 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:00,079 INFO  L93              Difference]: Finished difference Result 83 states and 191 transitions.
[2020-04-17 18:47:00,080 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-04-17 18:47:00,080 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 17
[2020-04-17 18:47:00,080 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:00,081 INFO  L225             Difference]: With dead ends: 83
[2020-04-17 18:47:00,081 INFO  L226             Difference]: Without dead ends: 77
[2020-04-17 18:47:00,082 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600
[2020-04-17 18:47:00,082 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2020-04-17 18:47:00,083 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55.
[2020-04-17 18:47:00,083 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-04-17 18:47:00,084 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions.
[2020-04-17 18:47:00,084 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17
[2020-04-17 18:47:00,084 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:00,084 INFO  L479      AbstractCegarLoop]: Abstraction has 55 states and 135 transitions.
[2020-04-17 18:47:00,084 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:47:00,084 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions.
[2020-04-17 18:47:00,085 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:47:00,085 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:00,085 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:00,288 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:00,288 INFO  L427      AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:00,289 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:00,289 INFO  L82        PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times
[2020-04-17 18:47:00,290 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:00,290 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749122063]
[2020-04-17 18:47:00,290 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:00,295 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:00,382 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:00,383 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749122063]
[2020-04-17 18:47:00,383 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653058689]
[2020-04-17 18:47:00,383 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:00,423 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:00,424 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:00,424 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:47:00,425 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:00,436 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:00,443 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:00,443 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:00,443 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12
[2020-04-17 18:47:00,443 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328494591]
[2020-04-17 18:47:00,443 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:47:00,444 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:00,444 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:47:00,444 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:47:00,444 INFO  L87              Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states.
[2020-04-17 18:47:00,698 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:00,699 INFO  L93              Difference]: Finished difference Result 89 states and 203 transitions.
[2020-04-17 18:47:00,702 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-04-17 18:47:00,702 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 17
[2020-04-17 18:47:00,702 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:00,703 INFO  L225             Difference]: With dead ends: 89
[2020-04-17 18:47:00,703 INFO  L226             Difference]: Without dead ends: 83
[2020-04-17 18:47:00,703 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702
[2020-04-17 18:47:00,704 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2020-04-17 18:47:00,705 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54.
[2020-04-17 18:47:00,705 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-04-17 18:47:00,705 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions.
[2020-04-17 18:47:00,705 INFO  L78                 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17
[2020-04-17 18:47:00,705 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:00,705 INFO  L479      AbstractCegarLoop]: Abstraction has 54 states and 133 transitions.
[2020-04-17 18:47:00,705 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:47:00,706 INFO  L276                IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions.
[2020-04-17 18:47:00,706 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:47:00,706 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:00,706 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:00,908 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:00,909 INFO  L427      AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:00,909 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:00,909 INFO  L82        PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times
[2020-04-17 18:47:00,909 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:00,910 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097498707]
[2020-04-17 18:47:00,910 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:00,916 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:01,016 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:01,017 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097498707]
[2020-04-17 18:47:01,017 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126083204]
[2020-04-17 18:47:01,017 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:01,087 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2020-04-17 18:47:01,087 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:01,088 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:47:01,089 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:01,103 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:01,103 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:01,103 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11
[2020-04-17 18:47:01,103 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072481414]
[2020-04-17 18:47:01,104 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:47:01,104 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:01,104 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:47:01,104 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:47:01,104 INFO  L87              Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states.
[2020-04-17 18:47:01,401 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:01,401 INFO  L93              Difference]: Finished difference Result 89 states and 205 transitions.
[2020-04-17 18:47:01,402 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:47:01,402 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 17
[2020-04-17 18:47:01,402 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:01,403 INFO  L225             Difference]: With dead ends: 89
[2020-04-17 18:47:01,403 INFO  L226             Difference]: Without dead ends: 83
[2020-04-17 18:47:01,403 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756
[2020-04-17 18:47:01,403 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2020-04-17 18:47:01,405 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57.
[2020-04-17 18:47:01,406 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2020-04-17 18:47:01,406 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions.
[2020-04-17 18:47:01,406 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17
[2020-04-17 18:47:01,406 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:01,406 INFO  L479      AbstractCegarLoop]: Abstraction has 57 states and 141 transitions.
[2020-04-17 18:47:01,407 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:47:01,407 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions.
[2020-04-17 18:47:01,407 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:47:01,407 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:01,407 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:01,610 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:01,610 INFO  L427      AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:01,611 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:01,611 INFO  L82        PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times
[2020-04-17 18:47:01,611 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:01,612 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250422433]
[2020-04-17 18:47:01,612 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:01,618 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:01,713 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:01,714 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250422433]
[2020-04-17 18:47:01,714 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664573710]
[2020-04-17 18:47:01,714 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:01,757 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:01,758 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:01,758 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:47:01,759 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:01,775 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:01,787 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:01,787 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:01,787 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12
[2020-04-17 18:47:01,787 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689528831]
[2020-04-17 18:47:01,788 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:47:01,788 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:01,788 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:47:01,788 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:47:01,788 INFO  L87              Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states.
[2020-04-17 18:47:02,151 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:02,151 INFO  L93              Difference]: Finished difference Result 86 states and 199 transitions.
[2020-04-17 18:47:02,152 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-04-17 18:47:02,152 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 17
[2020-04-17 18:47:02,152 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:02,153 INFO  L225             Difference]: With dead ends: 86
[2020-04-17 18:47:02,153 INFO  L226             Difference]: Without dead ends: 80
[2020-04-17 18:47:02,153 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812
[2020-04-17 18:47:02,154 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 80 states.
[2020-04-17 18:47:02,155 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56.
[2020-04-17 18:47:02,155 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-04-17 18:47:02,156 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions.
[2020-04-17 18:47:02,156 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17
[2020-04-17 18:47:02,156 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:02,156 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 139 transitions.
[2020-04-17 18:47:02,156 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:47:02,156 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions.
[2020-04-17 18:47:02,156 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:47:02,157 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:02,157 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:02,360 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:02,360 INFO  L427      AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:02,361 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:02,361 INFO  L82        PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times
[2020-04-17 18:47:02,361 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:02,362 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030480405]
[2020-04-17 18:47:02,362 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:02,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:02,441 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:02,441 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030480405]
[2020-04-17 18:47:02,441 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143614618]
[2020-04-17 18:47:02,442 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:02,485 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s)
[2020-04-17 18:47:02,486 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:02,487 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:47:02,487 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:02,498 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:02,498 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:02,498 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11
[2020-04-17 18:47:02,499 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842210087]
[2020-04-17 18:47:02,499 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:47:02,499 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:02,499 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:47:02,499 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:47:02,500 INFO  L87              Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states.
[2020-04-17 18:47:02,788 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:02,788 INFO  L93              Difference]: Finished difference Result 87 states and 203 transitions.
[2020-04-17 18:47:02,788 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-04-17 18:47:02,789 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 17
[2020-04-17 18:47:02,789 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:02,789 INFO  L225             Difference]: With dead ends: 87
[2020-04-17 18:47:02,789 INFO  L226             Difference]: Without dead ends: 81
[2020-04-17 18:47:02,790 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870
[2020-04-17 18:47:02,790 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81 states.
[2020-04-17 18:47:02,791 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59.
[2020-04-17 18:47:02,791 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2020-04-17 18:47:02,791 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions.
[2020-04-17 18:47:02,791 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17
[2020-04-17 18:47:02,791 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:02,791 INFO  L479      AbstractCegarLoop]: Abstraction has 59 states and 147 transitions.
[2020-04-17 18:47:02,791 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:47:02,792 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions.
[2020-04-17 18:47:02,792 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:47:02,792 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:02,792 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:02,992 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:02,993 INFO  L427      AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:02,993 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:02,994 INFO  L82        PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times
[2020-04-17 18:47:02,994 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:02,994 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701309688]
[2020-04-17 18:47:02,994 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:03,000 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:03,074 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:03,075 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701309688]
[2020-04-17 18:47:03,075 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253345878]
[2020-04-17 18:47:03,075 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:03,120 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s)
[2020-04-17 18:47:03,120 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:03,121 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:47:03,122 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:03,135 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:03,143 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:03,143 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:03,143 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12
[2020-04-17 18:47:03,143 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503335049]
[2020-04-17 18:47:03,143 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:47:03,144 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:03,144 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:47:03,144 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:47:03,144 INFO  L87              Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states.
[2020-04-17 18:47:03,523 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:03,523 INFO  L93              Difference]: Finished difference Result 84 states and 197 transitions.
[2020-04-17 18:47:03,524 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-04-17 18:47:03,524 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 17
[2020-04-17 18:47:03,524 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:03,525 INFO  L225             Difference]: With dead ends: 84
[2020-04-17 18:47:03,525 INFO  L226             Difference]: Without dead ends: 78
[2020-04-17 18:47:03,525 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930
[2020-04-17 18:47:03,526 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-04-17 18:47:03,527 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58.
[2020-04-17 18:47:03,528 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-04-17 18:47:03,528 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions.
[2020-04-17 18:47:03,528 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17
[2020-04-17 18:47:03,528 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:03,528 INFO  L479      AbstractCegarLoop]: Abstraction has 58 states and 145 transitions.
[2020-04-17 18:47:03,529 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:47:03,529 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions.
[2020-04-17 18:47:03,529 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:47:03,529 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:03,529 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:03,730 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:03,730 INFO  L427      AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:03,730 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:03,731 INFO  L82        PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times
[2020-04-17 18:47:03,731 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:03,731 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440591165]
[2020-04-17 18:47:03,731 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:03,738 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:03,805 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:03,805 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440591165]
[2020-04-17 18:47:03,805 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368243091]
[2020-04-17 18:47:03,805 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:03,847 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:03,848 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:47:03,849 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:03,864 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:03,864 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:03,864 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11
[2020-04-17 18:47:03,865 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458296781]
[2020-04-17 18:47:03,865 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-04-17 18:47:03,865 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:03,865 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-04-17 18:47:03,865 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156
[2020-04-17 18:47:03,866 INFO  L87              Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states.
[2020-04-17 18:47:04,216 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:04,217 INFO  L93              Difference]: Finished difference Result 104 states and 247 transitions.
[2020-04-17 18:47:04,217 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:47:04,217 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 17
[2020-04-17 18:47:04,217 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:04,218 INFO  L225             Difference]: With dead ends: 104
[2020-04-17 18:47:04,218 INFO  L226             Difference]: Without dead ends: 98
[2020-04-17 18:47:04,218 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992
[2020-04-17 18:47:04,219 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-04-17 18:47:04,220 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64.
[2020-04-17 18:47:04,220 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 64 states.
[2020-04-17 18:47:04,221 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions.
[2020-04-17 18:47:04,221 INFO  L78                 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17
[2020-04-17 18:47:04,221 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:04,221 INFO  L479      AbstractCegarLoop]: Abstraction has 64 states and 165 transitions.
[2020-04-17 18:47:04,221 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-04-17 18:47:04,221 INFO  L276                IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions.
[2020-04-17 18:47:04,221 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-04-17 18:47:04,222 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:04,222 INFO  L425         BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:04,422 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:04,423 INFO  L427      AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:04,423 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:04,423 INFO  L82        PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times
[2020-04-17 18:47:04,424 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:04,424 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410041952]
[2020-04-17 18:47:04,424 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:04,429 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:04,511 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:04,511 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410041952]
[2020-04-17 18:47:04,511 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098281037]
[2020-04-17 18:47:04,511 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:04,553 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:04,554 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:04,554 INFO  L264         TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-04-17 18:47:04,555 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:04,570 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:04,579 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:04,580 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:04,580 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12
[2020-04-17 18:47:04,580 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242881336]
[2020-04-17 18:47:04,580 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:47:04,580 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:04,580 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:47:04,581 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:47:04,581 INFO  L87              Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states.
[2020-04-17 18:47:05,007 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:05,007 INFO  L93              Difference]: Finished difference Result 85 states and 203 transitions.
[2020-04-17 18:47:05,007 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-04-17 18:47:05,007 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 17
[2020-04-17 18:47:05,008 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:05,008 INFO  L225             Difference]: With dead ends: 85
[2020-04-17 18:47:05,008 INFO  L226             Difference]: Without dead ends: 77
[2020-04-17 18:47:05,009 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056
[2020-04-17 18:47:05,009 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2020-04-17 18:47:05,010 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61.
[2020-04-17 18:47:05,010 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 61 states.
[2020-04-17 18:47:05,010 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions.
[2020-04-17 18:47:05,011 INFO  L78                 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17
[2020-04-17 18:47:05,011 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:05,011 INFO  L479      AbstractCegarLoop]: Abstraction has 61 states and 153 transitions.
[2020-04-17 18:47:05,011 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:47:05,011 INFO  L276                IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions.
[2020-04-17 18:47:05,011 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:05,011 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:05,012 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:05,215 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:05,215 INFO  L427      AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:05,215 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:05,216 INFO  L82        PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times
[2020-04-17 18:47:05,216 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:05,216 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630583775]
[2020-04-17 18:47:05,216 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:05,223 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:05,380 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:05,380 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630583775]
[2020-04-17 18:47:05,381 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543849671]
[2020-04-17 18:47:05,381 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:05,454 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2020-04-17 18:47:05,454 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:05,455 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:05,456 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:05,468 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:05,469 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:05,469 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12
[2020-04-17 18:47:05,470 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157553947]
[2020-04-17 18:47:05,470 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:47:05,470 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:05,470 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:47:05,470 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:47:05,471 INFO  L87              Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states.
[2020-04-17 18:47:05,671 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:05,672 INFO  L93              Difference]: Finished difference Result 94 states and 219 transitions.
[2020-04-17 18:47:05,672 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-04-17 18:47:05,672 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 18
[2020-04-17 18:47:05,672 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:05,673 INFO  L225             Difference]: With dead ends: 94
[2020-04-17 18:47:05,673 INFO  L226             Difference]: Without dead ends: 88
[2020-04-17 18:47:05,674 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600
[2020-04-17 18:47:05,674 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 88 states.
[2020-04-17 18:47:05,675 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63.
[2020-04-17 18:47:05,676 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 63 states.
[2020-04-17 18:47:05,676 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions.
[2020-04-17 18:47:05,676 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18
[2020-04-17 18:47:05,676 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:05,676 INFO  L479      AbstractCegarLoop]: Abstraction has 63 states and 157 transitions.
[2020-04-17 18:47:05,676 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:47:05,676 INFO  L276                IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions.
[2020-04-17 18:47:05,677 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:05,677 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:05,677 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:05,879 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:05,880 INFO  L427      AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:05,880 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:05,881 INFO  L82        PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times
[2020-04-17 18:47:05,881 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:05,881 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531093240]
[2020-04-17 18:47:05,881 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:05,886 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:05,991 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:05,992 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531093240]
[2020-04-17 18:47:05,992 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708779952]
[2020-04-17 18:47:05,992 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:06,036 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:06,036 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:06,037 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:06,037 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:06,051 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:06,058 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:06,059 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:06,059 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13
[2020-04-17 18:47:06,059 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853662076]
[2020-04-17 18:47:06,059 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:06,059 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:06,059 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:06,060 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:06,060 INFO  L87              Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states.
[2020-04-17 18:47:06,335 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:06,335 INFO  L93              Difference]: Finished difference Result 91 states and 213 transitions.
[2020-04-17 18:47:06,336 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-04-17 18:47:06,336 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 18
[2020-04-17 18:47:06,336 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:06,337 INFO  L225             Difference]: With dead ends: 91
[2020-04-17 18:47:06,337 INFO  L226             Difference]: Without dead ends: 85
[2020-04-17 18:47:06,337 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756
[2020-04-17 18:47:06,338 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2020-04-17 18:47:06,339 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62.
[2020-04-17 18:47:06,340 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-04-17 18:47:06,340 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions.
[2020-04-17 18:47:06,340 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18
[2020-04-17 18:47:06,340 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:06,340 INFO  L479      AbstractCegarLoop]: Abstraction has 62 states and 155 transitions.
[2020-04-17 18:47:06,341 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:06,341 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions.
[2020-04-17 18:47:06,341 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:06,341 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:06,341 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:06,541 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:06,542 INFO  L427      AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:06,542 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:06,542 INFO  L82        PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times
[2020-04-17 18:47:06,543 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:06,543 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201490157]
[2020-04-17 18:47:06,543 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:06,548 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:06,648 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:06,649 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201490157]
[2020-04-17 18:47:06,649 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014662859]
[2020-04-17 18:47:06,649 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:06,695 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s)
[2020-04-17 18:47:06,696 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:06,696 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:06,697 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:06,711 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:06,711 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:06,711 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12
[2020-04-17 18:47:06,711 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983968082]
[2020-04-17 18:47:06,712 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:47:06,712 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:06,712 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:47:06,712 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:47:06,712 INFO  L87              Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states.
[2020-04-17 18:47:06,936 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:06,937 INFO  L93              Difference]: Finished difference Result 88 states and 207 transitions.
[2020-04-17 18:47:06,937 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-04-17 18:47:06,937 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 18
[2020-04-17 18:47:06,937 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:06,938 INFO  L225             Difference]: With dead ends: 88
[2020-04-17 18:47:06,938 INFO  L226             Difference]: Without dead ends: 82
[2020-04-17 18:47:06,939 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702
[2020-04-17 18:47:06,939 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2020-04-17 18:47:06,940 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63.
[2020-04-17 18:47:06,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 63 states.
[2020-04-17 18:47:06,941 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions.
[2020-04-17 18:47:06,941 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18
[2020-04-17 18:47:06,941 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:06,941 INFO  L479      AbstractCegarLoop]: Abstraction has 63 states and 157 transitions.
[2020-04-17 18:47:06,941 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:47:06,941 INFO  L276                IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions.
[2020-04-17 18:47:06,941 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:06,942 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:06,942 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:07,142 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:07,143 INFO  L427      AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:07,143 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:07,143 INFO  L82        PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times
[2020-04-17 18:47:07,143 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:07,144 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125892932]
[2020-04-17 18:47:07,144 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:07,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:07,269 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:07,269 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125892932]
[2020-04-17 18:47:07,269 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676156314]
[2020-04-17 18:47:07,269 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:07,321 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s)
[2020-04-17 18:47:07,321 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:07,322 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:07,323 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:07,339 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:07,348 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:07,348 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:07,348 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13
[2020-04-17 18:47:07,348 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328872501]
[2020-04-17 18:47:07,349 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:07,349 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:07,349 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:07,349 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:07,349 INFO  L87              Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states.
[2020-04-17 18:47:07,672 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:07,673 INFO  L93              Difference]: Finished difference Result 87 states and 205 transitions.
[2020-04-17 18:47:07,673 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-04-17 18:47:07,673 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 18
[2020-04-17 18:47:07,673 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:07,674 INFO  L225             Difference]: With dead ends: 87
[2020-04-17 18:47:07,674 INFO  L226             Difference]: Without dead ends: 81
[2020-04-17 18:47:07,674 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870
[2020-04-17 18:47:07,675 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81 states.
[2020-04-17 18:47:07,677 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62.
[2020-04-17 18:47:07,677 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-04-17 18:47:07,677 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions.
[2020-04-17 18:47:07,677 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18
[2020-04-17 18:47:07,677 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:07,677 INFO  L479      AbstractCegarLoop]: Abstraction has 62 states and 155 transitions.
[2020-04-17 18:47:07,678 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:07,678 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions.
[2020-04-17 18:47:07,678 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:07,678 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:07,678 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:07,881 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:07,882 INFO  L427      AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:07,882 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:07,882 INFO  L82        PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times
[2020-04-17 18:47:07,882 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:07,882 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417414515]
[2020-04-17 18:47:07,882 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:07,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:07,982 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:07,982 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417414515]
[2020-04-17 18:47:07,982 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424056116]
[2020-04-17 18:47:07,982 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:08,026 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:08,027 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:08,027 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:08,060 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:08,061 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:08,061 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12
[2020-04-17 18:47:08,061 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461320267]
[2020-04-17 18:47:08,061 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:47:08,061 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:08,061 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:47:08,062 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:47:08,062 INFO  L87              Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states.
[2020-04-17 18:47:08,341 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:08,341 INFO  L93              Difference]: Finished difference Result 84 states and 199 transitions.
[2020-04-17 18:47:08,342 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:47:08,342 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 18
[2020-04-17 18:47:08,342 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:08,343 INFO  L225             Difference]: With dead ends: 84
[2020-04-17 18:47:08,343 INFO  L226             Difference]: Without dead ends: 78
[2020-04-17 18:47:08,343 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812
[2020-04-17 18:47:08,343 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-04-17 18:47:08,345 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63.
[2020-04-17 18:47:08,345 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 63 states.
[2020-04-17 18:47:08,345 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions.
[2020-04-17 18:47:08,345 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18
[2020-04-17 18:47:08,345 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:08,345 INFO  L479      AbstractCegarLoop]: Abstraction has 63 states and 157 transitions.
[2020-04-17 18:47:08,345 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:47:08,345 INFO  L276                IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions.
[2020-04-17 18:47:08,346 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:08,346 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:08,346 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:08,546 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:08,547 INFO  L427      AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:08,547 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:08,547 INFO  L82        PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times
[2020-04-17 18:47:08,548 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:08,548 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463625714]
[2020-04-17 18:47:08,548 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:08,553 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:08,648 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:08,648 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463625714]
[2020-04-17 18:47:08,648 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241331297]
[2020-04-17 18:47:08,648 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:08,691 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:08,691 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:08,692 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:08,695 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:08,710 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:08,718 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:08,718 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:08,719 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13
[2020-04-17 18:47:08,719 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669746768]
[2020-04-17 18:47:08,719 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:08,719 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:08,719 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:08,720 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:08,720 INFO  L87              Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states.
[2020-04-17 18:47:09,097 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:09,097 INFO  L93              Difference]: Finished difference Result 83 states and 197 transitions.
[2020-04-17 18:47:09,098 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-04-17 18:47:09,098 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 18
[2020-04-17 18:47:09,098 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:09,099 INFO  L225             Difference]: With dead ends: 83
[2020-04-17 18:47:09,099 INFO  L226             Difference]: Without dead ends: 77
[2020-04-17 18:47:09,099 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992
[2020-04-17 18:47:09,100 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 77 states.
[2020-04-17 18:47:09,101 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62.
[2020-04-17 18:47:09,102 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-04-17 18:47:09,102 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions.
[2020-04-17 18:47:09,102 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18
[2020-04-17 18:47:09,102 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:09,102 INFO  L479      AbstractCegarLoop]: Abstraction has 62 states and 155 transitions.
[2020-04-17 18:47:09,103 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:09,103 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions.
[2020-04-17 18:47:09,103 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:09,103 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:09,103 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:09,305 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:09,306 INFO  L427      AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:09,306 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:09,306 INFO  L82        PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times
[2020-04-17 18:47:09,307 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:09,307 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144847978]
[2020-04-17 18:47:09,307 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:09,312 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:09,400 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:09,400 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144847978]
[2020-04-17 18:47:09,401 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426888973]
[2020-04-17 18:47:09,401 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:09,447 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s)
[2020-04-17 18:47:09,447 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:09,448 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:47:09,449 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:09,472 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:09,472 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:09,472 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12
[2020-04-17 18:47:09,473 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237246923]
[2020-04-17 18:47:09,473 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:47:09,473 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:09,473 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:47:09,474 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:47:09,474 INFO  L87              Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states.
[2020-04-17 18:47:09,792 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:09,793 INFO  L93              Difference]: Finished difference Result 80 states and 191 transitions.
[2020-04-17 18:47:09,793 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-04-17 18:47:09,793 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 18
[2020-04-17 18:47:09,793 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:09,794 INFO  L225             Difference]: With dead ends: 80
[2020-04-17 18:47:09,794 INFO  L226             Difference]: Without dead ends: 74
[2020-04-17 18:47:09,795 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930
[2020-04-17 18:47:09,795 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 74 states.
[2020-04-17 18:47:09,796 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63.
[2020-04-17 18:47:09,796 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 63 states.
[2020-04-17 18:47:09,797 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions.
[2020-04-17 18:47:09,797 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18
[2020-04-17 18:47:09,797 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:09,797 INFO  L479      AbstractCegarLoop]: Abstraction has 63 states and 157 transitions.
[2020-04-17 18:47:09,797 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:47:09,797 INFO  L276                IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions.
[2020-04-17 18:47:09,798 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:09,798 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:09,798 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:09,999 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:10,000 INFO  L427      AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:10,000 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:10,000 INFO  L82        PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times
[2020-04-17 18:47:10,000 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:10,001 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030845655]
[2020-04-17 18:47:10,001 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:10,006 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:10,084 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:10,084 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030845655]
[2020-04-17 18:47:10,084 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441995059]
[2020-04-17 18:47:10,085 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:10,129 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:10,129 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:10,130 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:10,130 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:10,146 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:10,156 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:10,156 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:10,156 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13
[2020-04-17 18:47:10,157 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663514655]
[2020-04-17 18:47:10,157 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:10,157 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:10,158 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:10,158 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:10,158 INFO  L87              Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states.
[2020-04-17 18:47:10,624 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:10,624 INFO  L93              Difference]: Finished difference Result 79 states and 189 transitions.
[2020-04-17 18:47:10,624 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-04-17 18:47:10,624 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 18
[2020-04-17 18:47:10,625 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:10,625 INFO  L225             Difference]: With dead ends: 79
[2020-04-17 18:47:10,625 INFO  L226             Difference]: Without dead ends: 73
[2020-04-17 18:47:10,626 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122
[2020-04-17 18:47:10,626 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2020-04-17 18:47:10,628 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62.
[2020-04-17 18:47:10,628 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-04-17 18:47:10,628 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions.
[2020-04-17 18:47:10,628 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18
[2020-04-17 18:47:10,628 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:10,628 INFO  L479      AbstractCegarLoop]: Abstraction has 62 states and 155 transitions.
[2020-04-17 18:47:10,629 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:10,629 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions.
[2020-04-17 18:47:10,629 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:10,629 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:10,629 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:10,832 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:10,832 INFO  L427      AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:10,833 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:10,833 INFO  L82        PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times
[2020-04-17 18:47:10,833 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:10,834 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191912658]
[2020-04-17 18:47:10,834 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:10,839 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:10,921 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:10,921 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191912658]
[2020-04-17 18:47:10,922 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146101193]
[2020-04-17 18:47:10,922 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:10,968 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s)
[2020-04-17 18:47:10,968 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:10,969 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:10,970 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:10,979 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:10,979 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:10,979 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12
[2020-04-17 18:47:10,979 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113070745]
[2020-04-17 18:47:10,980 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-04-17 18:47:10,980 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:10,980 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-04-17 18:47:10,980 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182
[2020-04-17 18:47:10,980 INFO  L87              Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states.
[2020-04-17 18:47:11,342 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:11,342 INFO  L93              Difference]: Finished difference Result 95 states and 229 transitions.
[2020-04-17 18:47:11,343 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:47:11,343 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 18
[2020-04-17 18:47:11,343 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:11,344 INFO  L225             Difference]: With dead ends: 95
[2020-04-17 18:47:11,344 INFO  L226             Difference]: Without dead ends: 89
[2020-04-17 18:47:11,344 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056
[2020-04-17 18:47:11,345 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 89 states.
[2020-04-17 18:47:11,346 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66.
[2020-04-17 18:47:11,346 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2020-04-17 18:47:11,346 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions.
[2020-04-17 18:47:11,346 INFO  L78                 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18
[2020-04-17 18:47:11,347 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:11,347 INFO  L479      AbstractCegarLoop]: Abstraction has 66 states and 169 transitions.
[2020-04-17 18:47:11,347 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-04-17 18:47:11,347 INFO  L276                IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions.
[2020-04-17 18:47:11,347 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:11,347 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:11,347 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:11,549 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:11,550 INFO  L427      AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:11,550 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:11,550 INFO  L82        PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times
[2020-04-17 18:47:11,551 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:11,551 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244362310]
[2020-04-17 18:47:11,551 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:11,556 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:11,630 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:11,631 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244362310]
[2020-04-17 18:47:11,631 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224400789]
[2020-04-17 18:47:11,631 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:11,677 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s)
[2020-04-17 18:47:11,677 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:11,678 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:11,679 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:11,691 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:11,699 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:11,700 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:11,700 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13
[2020-04-17 18:47:11,700 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316804193]
[2020-04-17 18:47:11,700 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:11,700 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:11,700 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:11,701 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:11,701 INFO  L87              Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states.
[2020-04-17 18:47:12,170 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:12,170 INFO  L93              Difference]: Finished difference Result 76 states and 185 transitions.
[2020-04-17 18:47:12,170 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:47:12,171 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 18
[2020-04-17 18:47:12,171 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:12,172 INFO  L225             Difference]: With dead ends: 76
[2020-04-17 18:47:12,172 INFO  L226             Difference]: Without dead ends: 68
[2020-04-17 18:47:12,172 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260
[2020-04-17 18:47:12,173 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 68 states.
[2020-04-17 18:47:12,174 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49.
[2020-04-17 18:47:12,175 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 49 states.
[2020-04-17 18:47:12,175 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions.
[2020-04-17 18:47:12,175 INFO  L78                 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18
[2020-04-17 18:47:12,175 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:12,175 INFO  L479      AbstractCegarLoop]: Abstraction has 49 states and 118 transitions.
[2020-04-17 18:47:12,175 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:12,175 INFO  L276                IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions.
[2020-04-17 18:47:12,176 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-04-17 18:47:12,176 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:12,176 INFO  L425         BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:12,379 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:12,379 INFO  L427      AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:12,379 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:12,380 INFO  L82        PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times
[2020-04-17 18:47:12,380 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:12,380 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216816524]
[2020-04-17 18:47:12,380 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:12,385 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:12,467 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:12,468 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216816524]
[2020-04-17 18:47:12,468 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758819323]
[2020-04-17 18:47:12,468 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:12,513 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:12,514 INFO  L264         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-04-17 18:47:12,515 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:12,528 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:12,536 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:12,536 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:12,537 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13
[2020-04-17 18:47:12,537 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527712308]
[2020-04-17 18:47:12,537 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:12,537 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:12,537 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:12,537 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:12,537 INFO  L87              Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states.
[2020-04-17 18:47:12,959 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:12,959 INFO  L93              Difference]: Finished difference Result 84 states and 203 transitions.
[2020-04-17 18:47:12,959 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:47:12,959 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 18
[2020-04-17 18:47:12,960 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:12,960 INFO  L225             Difference]: With dead ends: 84
[2020-04-17 18:47:12,960 INFO  L226             Difference]: Without dead ends: 79
[2020-04-17 18:47:12,961 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260
[2020-04-17 18:47:12,961 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2020-04-17 18:47:12,963 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64.
[2020-04-17 18:47:12,963 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 64 states.
[2020-04-17 18:47:12,963 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions.
[2020-04-17 18:47:12,963 INFO  L78                 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18
[2020-04-17 18:47:12,964 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:12,964 INFO  L479      AbstractCegarLoop]: Abstraction has 64 states and 161 transitions.
[2020-04-17 18:47:12,964 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:12,964 INFO  L276                IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions.
[2020-04-17 18:47:12,964 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:12,965 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:12,965 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:13,168 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:13,168 INFO  L427      AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:13,168 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:13,169 INFO  L82        PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times
[2020-04-17 18:47:13,169 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:13,170 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637712975]
[2020-04-17 18:47:13,170 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:13,174 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:13,257 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:13,258 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637712975]
[2020-04-17 18:47:13,258 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109689717]
[2020-04-17 18:47:13,258 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:13,305 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:13,305 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:13,306 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:13,307 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:13,320 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:13,331 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:13,331 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:13,331 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14
[2020-04-17 18:47:13,331 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022744867]
[2020-04-17 18:47:13,331 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:13,331 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:13,332 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:13,332 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:13,332 INFO  L87              Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states.
[2020-04-17 18:47:13,789 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:13,789 INFO  L93              Difference]: Finished difference Result 72 states and 181 transitions.
[2020-04-17 18:47:13,789 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:47:13,790 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 19
[2020-04-17 18:47:13,790 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:13,790 INFO  L225             Difference]: With dead ends: 72
[2020-04-17 18:47:13,791 INFO  L226             Difference]: Without dead ends: 67
[2020-04-17 18:47:13,791 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332
[2020-04-17 18:47:13,791 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 67 states.
[2020-04-17 18:47:13,793 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50.
[2020-04-17 18:47:13,793 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 50 states.
[2020-04-17 18:47:13,793 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions.
[2020-04-17 18:47:13,793 INFO  L78                 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19
[2020-04-17 18:47:13,793 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:13,793 INFO  L479      AbstractCegarLoop]: Abstraction has 50 states and 122 transitions.
[2020-04-17 18:47:13,793 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:13,793 INFO  L276                IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions.
[2020-04-17 18:47:13,794 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:13,794 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:13,794 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:13,994 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:13,994 INFO  L427      AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:13,995 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:13,995 INFO  L82        PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times
[2020-04-17 18:47:13,995 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:13,995 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932558986]
[2020-04-17 18:47:13,995 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:14,001 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:14,111 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:14,112 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932558986]
[2020-04-17 18:47:14,112 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013542559]
[2020-04-17 18:47:14,112 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:14,165 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2020-04-17 18:47:14,165 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:14,166 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:14,166 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:14,179 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:14,180 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:14,180 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13
[2020-04-17 18:47:14,180 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019260747]
[2020-04-17 18:47:14,180 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:14,180 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:14,180 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:14,180 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:14,180 INFO  L87              Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states.
[2020-04-17 18:47:14,380 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:14,381 INFO  L93              Difference]: Finished difference Result 78 states and 181 transitions.
[2020-04-17 18:47:14,381 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-04-17 18:47:14,381 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 19
[2020-04-17 18:47:14,381 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:14,382 INFO  L225             Difference]: With dead ends: 78
[2020-04-17 18:47:14,382 INFO  L226             Difference]: Without dead ends: 72
[2020-04-17 18:47:14,383 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650
[2020-04-17 18:47:14,383 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-04-17 18:47:14,385 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58.
[2020-04-17 18:47:14,385 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-04-17 18:47:14,385 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions.
[2020-04-17 18:47:14,385 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19
[2020-04-17 18:47:14,385 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:14,385 INFO  L479      AbstractCegarLoop]: Abstraction has 58 states and 141 transitions.
[2020-04-17 18:47:14,385 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:14,385 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions.
[2020-04-17 18:47:14,386 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:14,386 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:14,386 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:14,588 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:14,589 INFO  L427      AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:14,589 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:14,590 INFO  L82        PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times
[2020-04-17 18:47:14,590 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:14,590 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355004307]
[2020-04-17 18:47:14,590 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:14,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:14,731 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:14,732 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355004307]
[2020-04-17 18:47:14,732 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316906827]
[2020-04-17 18:47:14,732 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:14,778 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:14,778 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:14,779 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:14,779 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:14,796 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:14,802 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:14,802 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:14,802 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14
[2020-04-17 18:47:14,802 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796349821]
[2020-04-17 18:47:14,803 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:14,803 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:14,803 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:14,803 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:14,803 INFO  L87              Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states.
[2020-04-17 18:47:15,046 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:15,046 INFO  L93              Difference]: Finished difference Result 90 states and 205 transitions.
[2020-04-17 18:47:15,047 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. 
[2020-04-17 18:47:15,047 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 19
[2020-04-17 18:47:15,047 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:15,048 INFO  L225             Difference]: With dead ends: 90
[2020-04-17 18:47:15,048 INFO  L226             Difference]: Without dead ends: 84
[2020-04-17 18:47:15,048 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756
[2020-04-17 18:47:15,049 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2020-04-17 18:47:15,050 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56.
[2020-04-17 18:47:15,050 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 56 states.
[2020-04-17 18:47:15,051 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions.
[2020-04-17 18:47:15,051 INFO  L78                 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19
[2020-04-17 18:47:15,051 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:15,051 INFO  L479      AbstractCegarLoop]: Abstraction has 56 states and 137 transitions.
[2020-04-17 18:47:15,051 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:15,052 INFO  L276                IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions.
[2020-04-17 18:47:15,052 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:15,052 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:15,052 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:15,255 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:15,255 INFO  L427      AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:15,256 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:15,256 INFO  L82        PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times
[2020-04-17 18:47:15,256 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:15,256 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083379529]
[2020-04-17 18:47:15,257 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:15,261 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:15,370 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:15,370 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083379529]
[2020-04-17 18:47:15,370 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373469593]
[2020-04-17 18:47:15,370 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:15,416 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s)
[2020-04-17 18:47:15,416 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:15,417 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:15,417 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:15,424 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:15,424 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:15,424 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13
[2020-04-17 18:47:15,424 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596841634]
[2020-04-17 18:47:15,424 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:15,424 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:15,425 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:15,425 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:15,425 INFO  L87              Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states.
[2020-04-17 18:47:15,704 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:15,704 INFO  L93              Difference]: Finished difference Result 91 states and 209 transitions.
[2020-04-17 18:47:15,704 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:47:15,705 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 19
[2020-04-17 18:47:15,705 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:15,705 INFO  L225             Difference]: With dead ends: 91
[2020-04-17 18:47:15,706 INFO  L226             Difference]: Without dead ends: 85
[2020-04-17 18:47:15,706 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812
[2020-04-17 18:47:15,706 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2020-04-17 18:47:15,707 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59.
[2020-04-17 18:47:15,708 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 59 states.
[2020-04-17 18:47:15,708 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions.
[2020-04-17 18:47:15,708 INFO  L78                 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19
[2020-04-17 18:47:15,708 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:15,708 INFO  L479      AbstractCegarLoop]: Abstraction has 59 states and 145 transitions.
[2020-04-17 18:47:15,708 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:15,708 INFO  L276                IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions.
[2020-04-17 18:47:15,708 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:15,708 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:15,709 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:15,909 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:15,909 INFO  L427      AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:15,910 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:15,910 INFO  L82        PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times
[2020-04-17 18:47:15,910 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:15,911 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118507906]
[2020-04-17 18:47:15,911 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:15,915 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:16,056 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:16,057 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118507906]
[2020-04-17 18:47:16,057 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192108489]
[2020-04-17 18:47:16,057 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:16,103 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s)
[2020-04-17 18:47:16,103 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:16,104 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:16,105 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:16,121 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:16,129 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:16,130 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:16,130 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14
[2020-04-17 18:47:16,130 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666256727]
[2020-04-17 18:47:16,130 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:16,130 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:16,130 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:16,131 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:16,131 INFO  L87              Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states.
[2020-04-17 18:47:16,439 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:16,439 INFO  L93              Difference]: Finished difference Result 99 states and 225 transitions.
[2020-04-17 18:47:16,439 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-04-17 18:47:16,440 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 19
[2020-04-17 18:47:16,440 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:16,440 INFO  L225             Difference]: With dead ends: 99
[2020-04-17 18:47:16,441 INFO  L226             Difference]: Without dead ends: 93
[2020-04-17 18:47:16,441 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930
[2020-04-17 18:47:16,441 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2020-04-17 18:47:16,445 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58.
[2020-04-17 18:47:16,445 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-04-17 18:47:16,445 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions.
[2020-04-17 18:47:16,445 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19
[2020-04-17 18:47:16,445 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:16,445 INFO  L479      AbstractCegarLoop]: Abstraction has 58 states and 143 transitions.
[2020-04-17 18:47:16,446 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:16,446 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions.
[2020-04-17 18:47:16,446 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:16,446 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:16,446 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:16,646 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:16,647 INFO  L427      AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:16,647 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:16,647 INFO  L82        PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times
[2020-04-17 18:47:16,648 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:16,648 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392231287]
[2020-04-17 18:47:16,648 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:16,653 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:16,770 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:16,770 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392231287]
[2020-04-17 18:47:16,771 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965990575]
[2020-04-17 18:47:16,771 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:16,815 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:16,816 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:16,816 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:16,827 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:16,827 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:16,827 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13
[2020-04-17 18:47:16,828 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624369898]
[2020-04-17 18:47:16,828 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:16,828 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:16,828 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:16,828 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:16,829 INFO  L87              Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states.
[2020-04-17 18:47:17,127 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:17,128 INFO  L93              Difference]: Finished difference Result 99 states and 227 transitions.
[2020-04-17 18:47:17,128 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-04-17 18:47:17,128 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 19
[2020-04-17 18:47:17,128 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:17,129 INFO  L225             Difference]: With dead ends: 99
[2020-04-17 18:47:17,129 INFO  L226             Difference]: Without dead ends: 93
[2020-04-17 18:47:17,130 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992
[2020-04-17 18:47:17,130 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2020-04-17 18:47:17,131 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61.
[2020-04-17 18:47:17,132 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 61 states.
[2020-04-17 18:47:17,132 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions.
[2020-04-17 18:47:17,132 INFO  L78                 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19
[2020-04-17 18:47:17,132 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:17,132 INFO  L479      AbstractCegarLoop]: Abstraction has 61 states and 151 transitions.
[2020-04-17 18:47:17,132 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:17,132 INFO  L276                IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions.
[2020-04-17 18:47:17,132 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:17,133 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:17,133 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:17,333 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:17,334 INFO  L427      AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:17,334 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:17,334 INFO  L82        PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times
[2020-04-17 18:47:17,334 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:17,335 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030915176]
[2020-04-17 18:47:17,335 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:17,340 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:17,468 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:17,469 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030915176]
[2020-04-17 18:47:17,469 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919052978]
[2020-04-17 18:47:17,469 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:17,527 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:17,527 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:17,528 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:17,529 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:17,550 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:17,560 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:17,560 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:17,561 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14
[2020-04-17 18:47:17,561 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223184062]
[2020-04-17 18:47:17,561 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:17,561 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:17,561 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:17,562 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:17,562 INFO  L87              Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states.
[2020-04-17 18:47:17,926 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:17,926 INFO  L93              Difference]: Finished difference Result 96 states and 221 transitions.
[2020-04-17 18:47:17,926 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-04-17 18:47:17,926 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 19
[2020-04-17 18:47:17,927 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:17,927 INFO  L225             Difference]: With dead ends: 96
[2020-04-17 18:47:17,927 INFO  L226             Difference]: Without dead ends: 90
[2020-04-17 18:47:17,928 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056
[2020-04-17 18:47:17,928 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2020-04-17 18:47:17,929 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60.
[2020-04-17 18:47:17,930 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 60 states.
[2020-04-17 18:47:17,930 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions.
[2020-04-17 18:47:17,930 INFO  L78                 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19
[2020-04-17 18:47:17,930 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:17,930 INFO  L479      AbstractCegarLoop]: Abstraction has 60 states and 149 transitions.
[2020-04-17 18:47:17,931 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:17,931 INFO  L276                IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions.
[2020-04-17 18:47:17,931 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:17,931 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:17,931 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:18,132 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:18,132 INFO  L427      AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:18,132 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:18,133 INFO  L82        PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times
[2020-04-17 18:47:18,133 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:18,133 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752351769]
[2020-04-17 18:47:18,133 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:18,138 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:18,230 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:18,230 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752351769]
[2020-04-17 18:47:18,230 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287891363]
[2020-04-17 18:47:18,230 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:18,277 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2020-04-17 18:47:18,277 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:18,278 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:18,279 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:18,288 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:18,288 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:18,289 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13
[2020-04-17 18:47:18,289 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777510942]
[2020-04-17 18:47:18,289 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:18,289 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:18,289 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:18,289 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:18,289 INFO  L87              Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states.
[2020-04-17 18:47:18,628 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:18,628 INFO  L93              Difference]: Finished difference Result 97 states and 225 transitions.
[2020-04-17 18:47:18,629 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:47:18,629 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 19
[2020-04-17 18:47:18,629 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:18,630 INFO  L225             Difference]: With dead ends: 97
[2020-04-17 18:47:18,630 INFO  L226             Difference]: Without dead ends: 91
[2020-04-17 18:47:18,631 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122
[2020-04-17 18:47:18,631 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2020-04-17 18:47:18,632 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63.
[2020-04-17 18:47:18,633 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 63 states.
[2020-04-17 18:47:18,633 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions.
[2020-04-17 18:47:18,633 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19
[2020-04-17 18:47:18,633 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:18,633 INFO  L479      AbstractCegarLoop]: Abstraction has 63 states and 157 transitions.
[2020-04-17 18:47:18,633 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:18,634 INFO  L276                IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions.
[2020-04-17 18:47:18,634 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:18,634 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:18,634 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:18,834 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:18,835 INFO  L427      AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:18,835 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:18,835 INFO  L82        PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times
[2020-04-17 18:47:18,836 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:18,836 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416583377]
[2020-04-17 18:47:18,836 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:18,841 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:18,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:18,934 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416583377]
[2020-04-17 18:47:18,934 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481069772]
[2020-04-17 18:47:18,935 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:18,978 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:18,979 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:18,979 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:18,980 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:18,992 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:19,007 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:19,007 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:19,007 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14
[2020-04-17 18:47:19,008 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44308407]
[2020-04-17 18:47:19,008 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:19,008 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:19,008 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:19,008 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:19,008 INFO  L87              Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states.
[2020-04-17 18:47:19,428 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:19,428 INFO  L93              Difference]: Finished difference Result 94 states and 219 transitions.
[2020-04-17 18:47:19,428 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-04-17 18:47:19,429 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 19
[2020-04-17 18:47:19,429 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:19,430 INFO  L225             Difference]: With dead ends: 94
[2020-04-17 18:47:19,430 INFO  L226             Difference]: Without dead ends: 88
[2020-04-17 18:47:19,430 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190
[2020-04-17 18:47:19,431 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 88 states.
[2020-04-17 18:47:19,432 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62.
[2020-04-17 18:47:19,433 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-04-17 18:47:19,433 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions.
[2020-04-17 18:47:19,433 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19
[2020-04-17 18:47:19,433 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:19,433 INFO  L479      AbstractCegarLoop]: Abstraction has 62 states and 155 transitions.
[2020-04-17 18:47:19,433 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:19,434 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions.
[2020-04-17 18:47:19,434 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:19,434 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:19,434 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:19,634 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:19,635 INFO  L427      AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:19,635 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:19,635 INFO  L82        PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times
[2020-04-17 18:47:19,636 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:19,636 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621494271]
[2020-04-17 18:47:19,636 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:19,640 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:19,747 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:19,747 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621494271]
[2020-04-17 18:47:19,748 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012646419]
[2020-04-17 18:47:19,748 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:19,792 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s)
[2020-04-17 18:47:19,792 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:19,793 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:19,793 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:19,823 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:19,824 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:19,824 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13
[2020-04-17 18:47:19,824 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710236689]
[2020-04-17 18:47:19,824 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:19,824 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:19,825 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:19,825 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:19,825 INFO  L87              Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states.
[2020-04-17 18:47:20,280 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:20,281 INFO  L93              Difference]: Finished difference Result 95 states and 223 transitions.
[2020-04-17 18:47:20,281 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-04-17 18:47:20,281 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 19
[2020-04-17 18:47:20,282 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:20,283 INFO  L225             Difference]: With dead ends: 95
[2020-04-17 18:47:20,283 INFO  L226             Difference]: Without dead ends: 89
[2020-04-17 18:47:20,283 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260
[2020-04-17 18:47:20,284 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 89 states.
[2020-04-17 18:47:20,286 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65.
[2020-04-17 18:47:20,286 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 65 states.
[2020-04-17 18:47:20,286 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions.
[2020-04-17 18:47:20,287 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19
[2020-04-17 18:47:20,287 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:20,287 INFO  L479      AbstractCegarLoop]: Abstraction has 65 states and 163 transitions.
[2020-04-17 18:47:20,287 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:20,287 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions.
[2020-04-17 18:47:20,288 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:20,288 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:20,288 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:20,492 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:20,493 INFO  L427      AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:20,493 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:20,493 INFO  L82        PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times
[2020-04-17 18:47:20,494 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:20,494 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938403624]
[2020-04-17 18:47:20,494 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:20,501 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:20,649 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:20,649 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938403624]
[2020-04-17 18:47:20,650 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49085851]
[2020-04-17 18:47:20,650 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:20,727 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s)
[2020-04-17 18:47:20,727 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:20,728 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:20,729 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:20,751 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:20,761 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:20,762 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:20,762 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14
[2020-04-17 18:47:20,762 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767799000]
[2020-04-17 18:47:20,762 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:20,762 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:20,762 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:20,763 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:20,763 INFO  L87              Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states.
[2020-04-17 18:47:21,229 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:21,229 INFO  L93              Difference]: Finished difference Result 92 states and 217 transitions.
[2020-04-17 18:47:21,229 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:47:21,229 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 19
[2020-04-17 18:47:21,230 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:21,230 INFO  L225             Difference]: With dead ends: 92
[2020-04-17 18:47:21,231 INFO  L226             Difference]: Without dead ends: 86
[2020-04-17 18:47:21,231 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332
[2020-04-17 18:47:21,231 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2020-04-17 18:47:21,233 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64.
[2020-04-17 18:47:21,233 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 64 states.
[2020-04-17 18:47:21,233 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions.
[2020-04-17 18:47:21,233 INFO  L78                 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19
[2020-04-17 18:47:21,233 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:21,234 INFO  L479      AbstractCegarLoop]: Abstraction has 64 states and 161 transitions.
[2020-04-17 18:47:21,234 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:21,234 INFO  L276                IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions.
[2020-04-17 18:47:21,234 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:21,234 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:21,234 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:21,438 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:21,438 INFO  L427      AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:21,439 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:21,439 INFO  L82        PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times
[2020-04-17 18:47:21,439 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:21,439 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598133205]
[2020-04-17 18:47:21,440 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:21,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:21,551 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:21,551 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598133205]
[2020-04-17 18:47:21,551 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269689829]
[2020-04-17 18:47:21,551 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:21,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:21,600 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core
[2020-04-17 18:47:21,601 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:21,618 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:21,619 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:21,619 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13
[2020-04-17 18:47:21,619 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001896732]
[2020-04-17 18:47:21,619 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-04-17 18:47:21,619 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:21,619 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-04-17 18:47:21,619 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210
[2020-04-17 18:47:21,619 INFO  L87              Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states.
[2020-04-17 18:47:22,025 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:22,026 INFO  L93              Difference]: Finished difference Result 112 states and 267 transitions.
[2020-04-17 18:47:22,026 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:47:22,026 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 19
[2020-04-17 18:47:22,026 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:22,027 INFO  L225             Difference]: With dead ends: 112
[2020-04-17 18:47:22,027 INFO  L226             Difference]: Without dead ends: 106
[2020-04-17 18:47:22,028 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406
[2020-04-17 18:47:22,028 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 106 states.
[2020-04-17 18:47:22,030 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70.
[2020-04-17 18:47:22,030 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-04-17 18:47:22,031 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions.
[2020-04-17 18:47:22,031 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19
[2020-04-17 18:47:22,031 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:22,031 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 181 transitions.
[2020-04-17 18:47:22,031 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-04-17 18:47:22,031 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions.
[2020-04-17 18:47:22,031 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-04-17 18:47:22,031 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:22,032 INFO  L425         BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:22,233 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:22,234 INFO  L427      AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:22,234 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:22,234 INFO  L82        PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times
[2020-04-17 18:47:22,235 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:22,235 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893204381]
[2020-04-17 18:47:22,235 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:22,240 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:22,331 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:22,331 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893204381]
[2020-04-17 18:47:22,331 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136773775]
[2020-04-17 18:47:22,331 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:22,376 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:22,377 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:22,378 INFO  L264         TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:22,378 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:22,401 INFO  L134       CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:22,401 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:22,401 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14
[2020-04-17 18:47:22,402 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234114759]
[2020-04-17 18:47:22,402 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:22,402 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:22,402 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:22,402 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:22,402 INFO  L87              Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states.
[2020-04-17 18:47:22,913 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:22,913 INFO  L93              Difference]: Finished difference Result 93 states and 223 transitions.
[2020-04-17 18:47:22,913 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:47:22,913 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 19
[2020-04-17 18:47:22,914 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:22,914 INFO  L225             Difference]: With dead ends: 93
[2020-04-17 18:47:22,914 INFO  L226             Difference]: Without dead ends: 85
[2020-04-17 18:47:22,915 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482
[2020-04-17 18:47:22,915 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2020-04-17 18:47:22,917 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67.
[2020-04-17 18:47:22,917 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 67 states.
[2020-04-17 18:47:22,917 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions.
[2020-04-17 18:47:22,917 INFO  L78                 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19
[2020-04-17 18:47:22,917 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:22,917 INFO  L479      AbstractCegarLoop]: Abstraction has 67 states and 169 transitions.
[2020-04-17 18:47:22,917 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:22,917 INFO  L276                IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions.
[2020-04-17 18:47:22,918 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:22,918 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:22,918 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:23,118 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:23,118 INFO  L427      AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:23,119 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:23,119 INFO  L82        PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times
[2020-04-17 18:47:23,119 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:23,120 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278459406]
[2020-04-17 18:47:23,120 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:23,126 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:23,253 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:23,253 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278459406]
[2020-04-17 18:47:23,254 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617515073]
[2020-04-17 18:47:23,254 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:23,298 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2020-04-17 18:47:23,299 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:23,299 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:23,300 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:23,307 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:23,308 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:23,308 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14
[2020-04-17 18:47:23,308 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945248525]
[2020-04-17 18:47:23,308 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:23,308 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:23,308 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:23,309 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:23,309 INFO  L87              Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states.
[2020-04-17 18:47:23,560 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:23,560 INFO  L93              Difference]: Finished difference Result 104 states and 243 transitions.
[2020-04-17 18:47:23,561 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-04-17 18:47:23,561 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 20
[2020-04-17 18:47:23,561 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:23,562 INFO  L225             Difference]: With dead ends: 104
[2020-04-17 18:47:23,562 INFO  L226             Difference]: Without dead ends: 98
[2020-04-17 18:47:23,562 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812
[2020-04-17 18:47:23,563 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-04-17 18:47:23,564 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69.
[2020-04-17 18:47:23,564 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2020-04-17 18:47:23,565 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions.
[2020-04-17 18:47:23,565 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20
[2020-04-17 18:47:23,565 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:23,565 INFO  L479      AbstractCegarLoop]: Abstraction has 69 states and 173 transitions.
[2020-04-17 18:47:23,565 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:23,566 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions.
[2020-04-17 18:47:23,566 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:23,566 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:23,566 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:23,769 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:23,770 INFO  L427      AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:23,770 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:23,771 INFO  L82        PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times
[2020-04-17 18:47:23,771 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:23,771 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249714766]
[2020-04-17 18:47:23,772 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:23,776 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:23,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:23,901 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249714766]
[2020-04-17 18:47:23,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908947600]
[2020-04-17 18:47:23,902 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:23,946 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:23,946 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:23,947 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:23,947 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:23,960 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:23,973 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:23,974 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:23,974 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15
[2020-04-17 18:47:23,974 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271090128]
[2020-04-17 18:47:23,974 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:23,974 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:23,974 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:23,975 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:23,975 INFO  L87              Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states.
[2020-04-17 18:47:24,288 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:24,289 INFO  L93              Difference]: Finished difference Result 101 states and 237 transitions.
[2020-04-17 18:47:24,289 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-04-17 18:47:24,289 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 20
[2020-04-17 18:47:24,289 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:24,290 INFO  L225             Difference]: With dead ends: 101
[2020-04-17 18:47:24,290 INFO  L226             Difference]: Without dead ends: 95
[2020-04-17 18:47:24,291 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992
[2020-04-17 18:47:24,291 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-04-17 18:47:24,292 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68.
[2020-04-17 18:47:24,293 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68 states.
[2020-04-17 18:47:24,293 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions.
[2020-04-17 18:47:24,293 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20
[2020-04-17 18:47:24,293 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:24,293 INFO  L479      AbstractCegarLoop]: Abstraction has 68 states and 171 transitions.
[2020-04-17 18:47:24,294 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:24,294 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions.
[2020-04-17 18:47:24,294 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:24,294 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:24,294 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:24,495 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:24,495 INFO  L427      AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:24,495 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:24,496 INFO  L82        PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times
[2020-04-17 18:47:24,496 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:24,497 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210788574]
[2020-04-17 18:47:24,497 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:24,501 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:24,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:24,653 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210788574]
[2020-04-17 18:47:24,653 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460038704]
[2020-04-17 18:47:24,654 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:24,707 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s)
[2020-04-17 18:47:24,707 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:24,708 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:24,709 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:24,718 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:24,718 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:24,718 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14
[2020-04-17 18:47:24,718 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516060231]
[2020-04-17 18:47:24,718 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:24,719 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:24,719 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:24,719 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:24,719 INFO  L87              Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states.
[2020-04-17 18:47:24,986 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:24,986 INFO  L93              Difference]: Finished difference Result 98 states and 231 transitions.
[2020-04-17 18:47:24,986 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:47:24,987 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 20
[2020-04-17 18:47:24,987 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:24,987 INFO  L225             Difference]: With dead ends: 98
[2020-04-17 18:47:24,988 INFO  L226             Difference]: Without dead ends: 92
[2020-04-17 18:47:24,988 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930
[2020-04-17 18:47:24,988 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2020-04-17 18:47:24,990 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69.
[2020-04-17 18:47:24,990 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2020-04-17 18:47:24,991 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions.
[2020-04-17 18:47:24,991 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20
[2020-04-17 18:47:24,991 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:24,991 INFO  L479      AbstractCegarLoop]: Abstraction has 69 states and 173 transitions.
[2020-04-17 18:47:24,991 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:24,991 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions.
[2020-04-17 18:47:24,992 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:24,992 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:24,992 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:25,193 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:25,194 INFO  L427      AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:25,194 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:25,194 INFO  L82        PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times
[2020-04-17 18:47:25,195 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:25,195 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032277696]
[2020-04-17 18:47:25,195 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:25,201 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:25,315 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:25,316 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032277696]
[2020-04-17 18:47:25,316 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296369916]
[2020-04-17 18:47:25,316 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:25,365 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s)
[2020-04-17 18:47:25,365 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:25,366 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:25,367 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:25,386 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:25,394 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:25,394 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:25,394 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15
[2020-04-17 18:47:25,394 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316129121]
[2020-04-17 18:47:25,394 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:25,395 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:25,395 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:25,395 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:25,395 INFO  L87              Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states.
[2020-04-17 18:47:25,769 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:25,769 INFO  L93              Difference]: Finished difference Result 97 states and 229 transitions.
[2020-04-17 18:47:25,769 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-04-17 18:47:25,770 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 20
[2020-04-17 18:47:25,770 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:25,771 INFO  L225             Difference]: With dead ends: 97
[2020-04-17 18:47:25,771 INFO  L226             Difference]: Without dead ends: 91
[2020-04-17 18:47:25,771 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122
[2020-04-17 18:47:25,772 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2020-04-17 18:47:25,773 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68.
[2020-04-17 18:47:25,774 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68 states.
[2020-04-17 18:47:25,774 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions.
[2020-04-17 18:47:25,774 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20
[2020-04-17 18:47:25,774 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:25,774 INFO  L479      AbstractCegarLoop]: Abstraction has 68 states and 171 transitions.
[2020-04-17 18:47:25,774 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:25,774 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions.
[2020-04-17 18:47:25,775 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:25,775 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:25,775 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:25,978 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:25,978 INFO  L427      AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:25,978 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:25,978 INFO  L82        PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times
[2020-04-17 18:47:25,978 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:25,979 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741740287]
[2020-04-17 18:47:25,979 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:25,983 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:26,082 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:26,082 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741740287]
[2020-04-17 18:47:26,083 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692310028]
[2020-04-17 18:47:26,083 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:26,128 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:26,129 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:26,130 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:26,137 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:26,138 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:26,138 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14
[2020-04-17 18:47:26,138 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488602116]
[2020-04-17 18:47:26,138 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:26,138 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:26,138 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:26,139 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:26,139 INFO  L87              Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states.
[2020-04-17 18:47:26,456 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:26,457 INFO  L93              Difference]: Finished difference Result 94 states and 223 transitions.
[2020-04-17 18:47:26,457 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-04-17 18:47:26,457 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 20
[2020-04-17 18:47:26,457 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:26,458 INFO  L225             Difference]: With dead ends: 94
[2020-04-17 18:47:26,458 INFO  L226             Difference]: Without dead ends: 88
[2020-04-17 18:47:26,459 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056
[2020-04-17 18:47:26,459 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 88 states.
[2020-04-17 18:47:26,461 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69.
[2020-04-17 18:47:26,461 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2020-04-17 18:47:26,461 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions.
[2020-04-17 18:47:26,461 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20
[2020-04-17 18:47:26,462 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:26,462 INFO  L479      AbstractCegarLoop]: Abstraction has 69 states and 173 transitions.
[2020-04-17 18:47:26,462 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:26,462 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions.
[2020-04-17 18:47:26,462 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:26,462 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:26,462 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:26,665 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:26,666 INFO  L427      AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:26,666 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:26,667 INFO  L82        PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times
[2020-04-17 18:47:26,667 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:26,667 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741508948]
[2020-04-17 18:47:26,668 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:26,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:26,796 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:26,797 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741508948]
[2020-04-17 18:47:26,797 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340779202]
[2020-04-17 18:47:26,797 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:26,842 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:26,842 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:26,843 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:26,844 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:26,857 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:26,865 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:26,865 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:26,865 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15
[2020-04-17 18:47:26,866 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726361264]
[2020-04-17 18:47:26,866 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:26,866 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:26,866 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:26,866 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:26,866 INFO  L87              Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states.
[2020-04-17 18:47:27,294 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:27,294 INFO  L93              Difference]: Finished difference Result 93 states and 221 transitions.
[2020-04-17 18:47:27,294 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-04-17 18:47:27,295 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 20
[2020-04-17 18:47:27,295 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:27,296 INFO  L225             Difference]: With dead ends: 93
[2020-04-17 18:47:27,296 INFO  L226             Difference]: Without dead ends: 87
[2020-04-17 18:47:27,296 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260
[2020-04-17 18:47:27,296 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 87 states.
[2020-04-17 18:47:27,298 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68.
[2020-04-17 18:47:27,298 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68 states.
[2020-04-17 18:47:27,298 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions.
[2020-04-17 18:47:27,298 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20
[2020-04-17 18:47:27,299 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:27,299 INFO  L479      AbstractCegarLoop]: Abstraction has 68 states and 171 transitions.
[2020-04-17 18:47:27,299 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:27,299 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions.
[2020-04-17 18:47:27,299 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:27,299 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:27,300 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:27,500 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:27,500 INFO  L427      AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:27,501 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:27,501 INFO  L82        PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times
[2020-04-17 18:47:27,501 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:27,502 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376065866]
[2020-04-17 18:47:27,502 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:27,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:27,606 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:27,606 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376065866]
[2020-04-17 18:47:27,607 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932538953]
[2020-04-17 18:47:27,607 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:27,656 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2020-04-17 18:47:27,656 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:27,657 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:27,657 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:27,669 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:27,669 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:27,670 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14
[2020-04-17 18:47:27,670 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192804039]
[2020-04-17 18:47:27,670 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:27,670 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:27,670 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:27,670 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:27,670 INFO  L87              Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states.
[2020-04-17 18:47:28,035 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:28,035 INFO  L93              Difference]: Finished difference Result 90 states and 215 transitions.
[2020-04-17 18:47:28,036 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:47:28,036 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 20
[2020-04-17 18:47:28,036 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:28,037 INFO  L225             Difference]: With dead ends: 90
[2020-04-17 18:47:28,037 INFO  L226             Difference]: Without dead ends: 84
[2020-04-17 18:47:28,037 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190
[2020-04-17 18:47:28,038 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2020-04-17 18:47:28,039 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69.
[2020-04-17 18:47:28,039 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2020-04-17 18:47:28,039 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions.
[2020-04-17 18:47:28,039 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20
[2020-04-17 18:47:28,040 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:28,040 INFO  L479      AbstractCegarLoop]: Abstraction has 69 states and 173 transitions.
[2020-04-17 18:47:28,040 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:28,040 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions.
[2020-04-17 18:47:28,040 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:28,040 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:28,041 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:28,241 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:28,241 INFO  L427      AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:28,242 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:28,242 INFO  L82        PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times
[2020-04-17 18:47:28,242 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:28,243 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238903260]
[2020-04-17 18:47:28,243 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:28,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:28,350 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:28,350 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238903260]
[2020-04-17 18:47:28,351 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056283213]
[2020-04-17 18:47:28,351 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:28,395 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:28,395 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:28,396 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:28,397 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:28,410 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:28,418 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:28,419 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:28,419 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15
[2020-04-17 18:47:28,419 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305762933]
[2020-04-17 18:47:28,419 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:28,419 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:28,419 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:28,419 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:28,419 INFO  L87              Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states.
[2020-04-17 18:47:28,936 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:28,937 INFO  L93              Difference]: Finished difference Result 89 states and 213 transitions.
[2020-04-17 18:47:28,937 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:47:28,937 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 20
[2020-04-17 18:47:28,937 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:28,938 INFO  L225             Difference]: With dead ends: 89
[2020-04-17 18:47:28,938 INFO  L226             Difference]: Without dead ends: 83
[2020-04-17 18:47:28,939 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406
[2020-04-17 18:47:28,939 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2020-04-17 18:47:28,941 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68.
[2020-04-17 18:47:28,941 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68 states.
[2020-04-17 18:47:28,941 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions.
[2020-04-17 18:47:28,941 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20
[2020-04-17 18:47:28,942 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:28,942 INFO  L479      AbstractCegarLoop]: Abstraction has 68 states and 171 transitions.
[2020-04-17 18:47:28,942 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:28,942 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions.
[2020-04-17 18:47:28,942 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:28,942 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:28,942 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:29,145 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:29,146 INFO  L427      AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:29,146 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:29,147 INFO  L82        PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times
[2020-04-17 18:47:29,147 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:29,147 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727879069]
[2020-04-17 18:47:29,147 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:29,152 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:29,241 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:29,241 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727879069]
[2020-04-17 18:47:29,241 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403782708]
[2020-04-17 18:47:29,242 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:29,291 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s)
[2020-04-17 18:47:29,291 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:29,292 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:29,293 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:29,316 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:29,316 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:29,316 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14
[2020-04-17 18:47:29,316 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751156507]
[2020-04-17 18:47:29,317 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:29,317 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:29,317 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:29,317 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:29,317 INFO  L87              Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states.
[2020-04-17 18:47:29,710 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:29,711 INFO  L93              Difference]: Finished difference Result 86 states and 207 transitions.
[2020-04-17 18:47:29,711 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-04-17 18:47:29,711 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 20
[2020-04-17 18:47:29,711 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:29,712 INFO  L225             Difference]: With dead ends: 86
[2020-04-17 18:47:29,712 INFO  L226             Difference]: Without dead ends: 80
[2020-04-17 18:47:29,713 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332
[2020-04-17 18:47:29,713 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 80 states.
[2020-04-17 18:47:29,714 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69.
[2020-04-17 18:47:29,715 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2020-04-17 18:47:29,715 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions.
[2020-04-17 18:47:29,715 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20
[2020-04-17 18:47:29,716 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:29,716 INFO  L479      AbstractCegarLoop]: Abstraction has 69 states and 173 transitions.
[2020-04-17 18:47:29,716 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:29,716 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions.
[2020-04-17 18:47:29,716 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:29,716 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:29,716 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:29,920 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:29,920 INFO  L427      AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:29,920 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:29,921 INFO  L82        PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times
[2020-04-17 18:47:29,921 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:29,921 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553245812]
[2020-04-17 18:47:29,921 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:29,927 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:30,024 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:30,024 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553245812]
[2020-04-17 18:47:30,024 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950112232]
[2020-04-17 18:47:30,025 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:30,073 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s)
[2020-04-17 18:47:30,073 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:30,074 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:30,075 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:30,093 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:30,101 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:30,101 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:30,101 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15
[2020-04-17 18:47:30,101 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237771946]
[2020-04-17 18:47:30,101 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:30,101 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:30,102 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:30,102 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:30,102 INFO  L87              Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states.
[2020-04-17 18:47:30,664 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:30,664 INFO  L93              Difference]: Finished difference Result 85 states and 205 transitions.
[2020-04-17 18:47:30,665 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:47:30,665 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 20
[2020-04-17 18:47:30,665 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:30,666 INFO  L225             Difference]: With dead ends: 85
[2020-04-17 18:47:30,666 INFO  L226             Difference]: Without dead ends: 79
[2020-04-17 18:47:30,666 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560
[2020-04-17 18:47:30,666 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2020-04-17 18:47:30,668 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68.
[2020-04-17 18:47:30,668 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68 states.
[2020-04-17 18:47:30,668 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions.
[2020-04-17 18:47:30,668 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20
[2020-04-17 18:47:30,669 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:30,669 INFO  L479      AbstractCegarLoop]: Abstraction has 68 states and 171 transitions.
[2020-04-17 18:47:30,669 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:30,669 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions.
[2020-04-17 18:47:30,669 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:30,669 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:30,670 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:30,873 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:30,874 INFO  L427      AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:30,874 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:30,874 INFO  L82        PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times
[2020-04-17 18:47:30,874 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:30,875 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570040011]
[2020-04-17 18:47:30,875 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:30,879 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:30,970 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:30,971 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570040011]
[2020-04-17 18:47:30,971 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260260847]
[2020-04-17 18:47:30,971 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:31,015 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:31,016 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:31,017 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:31,027 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:31,027 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:31,027 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14
[2020-04-17 18:47:31,027 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899861022]
[2020-04-17 18:47:31,028 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-04-17 18:47:31,028 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:31,028 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-04-17 18:47:31,028 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240
[2020-04-17 18:47:31,028 INFO  L87              Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states.
[2020-04-17 18:47:31,457 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:31,457 INFO  L93              Difference]: Finished difference Result 101 states and 245 transitions.
[2020-04-17 18:47:31,458 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:47:31,458 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 20
[2020-04-17 18:47:31,458 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:31,459 INFO  L225             Difference]: With dead ends: 101
[2020-04-17 18:47:31,459 INFO  L226             Difference]: Without dead ends: 95
[2020-04-17 18:47:31,459 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482
[2020-04-17 18:47:31,460 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-04-17 18:47:31,462 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72.
[2020-04-17 18:47:31,462 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 72 states.
[2020-04-17 18:47:31,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions.
[2020-04-17 18:47:31,462 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20
[2020-04-17 18:47:31,462 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:31,463 INFO  L479      AbstractCegarLoop]: Abstraction has 72 states and 185 transitions.
[2020-04-17 18:47:31,463 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-04-17 18:47:31,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions.
[2020-04-17 18:47:31,463 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:31,463 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:31,463 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:31,666 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:31,667 INFO  L427      AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:31,667 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:31,667 INFO  L82        PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times
[2020-04-17 18:47:31,668 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:31,668 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162591974]
[2020-04-17 18:47:31,668 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:31,673 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:31,758 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:31,758 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162591974]
[2020-04-17 18:47:31,758 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832117113]
[2020-04-17 18:47:31,758 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:31,805 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:31,805 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:31,806 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:31,807 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:31,831 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:31,831 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:31,831 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15
[2020-04-17 18:47:31,831 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055223122]
[2020-04-17 18:47:31,831 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:31,831 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:31,832 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:31,832 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:31,832 INFO  L87              Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states.
[2020-04-17 18:47:32,361 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:32,361 INFO  L93              Difference]: Finished difference Result 80 states and 197 transitions.
[2020-04-17 18:47:32,362 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:47:32,362 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 20
[2020-04-17 18:47:32,362 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:32,363 INFO  L225             Difference]: With dead ends: 80
[2020-04-17 18:47:32,363 INFO  L226             Difference]: Without dead ends: 72
[2020-04-17 18:47:32,363 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560
[2020-04-17 18:47:32,363 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 72 states.
[2020-04-17 18:47:32,365 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53.
[2020-04-17 18:47:32,365 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 53 states.
[2020-04-17 18:47:32,365 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions.
[2020-04-17 18:47:32,366 INFO  L78                 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20
[2020-04-17 18:47:32,366 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:32,366 INFO  L479      AbstractCegarLoop]: Abstraction has 53 states and 128 transitions.
[2020-04-17 18:47:32,366 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:32,366 INFO  L276                IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions.
[2020-04-17 18:47:32,366 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-04-17 18:47:32,366 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:32,367 INFO  L425         BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:32,569 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:32,570 INFO  L427      AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:32,570 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:32,570 INFO  L82        PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times
[2020-04-17 18:47:32,571 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:32,571 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663329518]
[2020-04-17 18:47:32,571 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:32,577 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:32,662 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:32,662 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663329518]
[2020-04-17 18:47:32,662 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495153208]
[2020-04-17 18:47:32,662 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:32,711 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s)
[2020-04-17 18:47:32,711 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:32,712 INFO  L264         TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core
[2020-04-17 18:47:32,712 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:32,734 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:32,744 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:32,744 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:32,744 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15
[2020-04-17 18:47:32,745 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5174947]
[2020-04-17 18:47:32,745 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:32,745 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:32,745 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:32,745 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:32,745 INFO  L87              Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states.
[2020-04-17 18:47:33,284 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:33,284 INFO  L93              Difference]: Finished difference Result 92 states and 223 transitions.
[2020-04-17 18:47:33,284 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:47:33,284 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 20
[2020-04-17 18:47:33,285 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:33,285 INFO  L225             Difference]: With dead ends: 92
[2020-04-17 18:47:33,286 INFO  L226             Difference]: Without dead ends: 87
[2020-04-17 18:47:33,286 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722
[2020-04-17 18:47:33,286 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 87 states.
[2020-04-17 18:47:33,288 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70.
[2020-04-17 18:47:33,288 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-04-17 18:47:33,288 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions.
[2020-04-17 18:47:33,288 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20
[2020-04-17 18:47:33,288 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:33,289 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 177 transitions.
[2020-04-17 18:47:33,289 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:33,289 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions.
[2020-04-17 18:47:33,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:33,289 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:33,289 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:33,492 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:33,493 INFO  L427      AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:33,493 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:33,493 INFO  L82        PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times
[2020-04-17 18:47:33,494 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:33,494 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998127801]
[2020-04-17 18:47:33,494 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:33,499 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:33,609 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:33,609 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998127801]
[2020-04-17 18:47:33,610 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670777302]
[2020-04-17 18:47:33,610 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:33,655 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:33,655 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:33,656 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:33,656 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:33,669 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:33,680 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:33,680 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:33,680 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16
[2020-04-17 18:47:33,680 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831688412]
[2020-04-17 18:47:33,681 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:33,681 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:33,681 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:33,681 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:33,681 INFO  L87              Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states.
[2020-04-17 18:47:34,261 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:34,261 INFO  L93              Difference]: Finished difference Result 78 states and 197 transitions.
[2020-04-17 18:47:34,262 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:47:34,262 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 21
[2020-04-17 18:47:34,262 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:34,263 INFO  L225             Difference]: With dead ends: 78
[2020-04-17 18:47:34,263 INFO  L226             Difference]: Without dead ends: 73
[2020-04-17 18:47:34,263 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806
[2020-04-17 18:47:34,263 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73 states.
[2020-04-17 18:47:34,264 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54.
[2020-04-17 18:47:34,265 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-04-17 18:47:34,265 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions.
[2020-04-17 18:47:34,265 INFO  L78                 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21
[2020-04-17 18:47:34,265 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:34,266 INFO  L479      AbstractCegarLoop]: Abstraction has 54 states and 132 transitions.
[2020-04-17 18:47:34,266 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:34,266 INFO  L276                IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions.
[2020-04-17 18:47:34,266 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:34,266 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:34,267 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:34,469 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:34,470 INFO  L427      AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:34,470 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:34,470 INFO  L82        PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times
[2020-04-17 18:47:34,470 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:34,471 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083587076]
[2020-04-17 18:47:34,471 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:34,476 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:34,617 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:34,617 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083587076]
[2020-04-17 18:47:34,617 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080426468]
[2020-04-17 18:47:34,618 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:34,666 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s)
[2020-04-17 18:47:34,666 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:34,667 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:34,667 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:34,694 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:34,695 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:34,695 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2020-04-17 18:47:34,695 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433085802]
[2020-04-17 18:47:34,695 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:34,695 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:34,696 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:34,696 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:34,696 INFO  L87              Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states.
[2020-04-17 18:47:34,951 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:34,951 INFO  L93              Difference]: Finished difference Result 84 states and 195 transitions.
[2020-04-17 18:47:34,951 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-04-17 18:47:34,951 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 21
[2020-04-17 18:47:34,952 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:34,952 INFO  L225             Difference]: With dead ends: 84
[2020-04-17 18:47:34,952 INFO  L226             Difference]: Without dead ends: 78
[2020-04-17 18:47:34,953 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870
[2020-04-17 18:47:34,953 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-04-17 18:47:34,954 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62.
[2020-04-17 18:47:34,954 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-04-17 18:47:34,955 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions.
[2020-04-17 18:47:34,955 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21
[2020-04-17 18:47:34,955 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:34,955 INFO  L479      AbstractCegarLoop]: Abstraction has 62 states and 151 transitions.
[2020-04-17 18:47:34,955 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:34,955 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions.
[2020-04-17 18:47:34,956 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:34,956 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:34,956 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:35,156 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:35,157 INFO  L427      AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:35,157 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:35,157 INFO  L82        PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times
[2020-04-17 18:47:35,158 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:35,158 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403630717]
[2020-04-17 18:47:35,158 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:35,163 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:35,303 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:35,303 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403630717]
[2020-04-17 18:47:35,303 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857081049]
[2020-04-17 18:47:35,303 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:35,351 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s)
[2020-04-17 18:47:35,352 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:35,353 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:35,354 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:35,368 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:35,374 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:35,375 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:35,375 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16
[2020-04-17 18:47:35,375 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279129907]
[2020-04-17 18:47:35,375 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:35,375 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:35,375 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:35,375 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:35,376 INFO  L87              Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states.
[2020-04-17 18:47:35,667 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:35,667 INFO  L93              Difference]: Finished difference Result 98 states and 223 transitions.
[2020-04-17 18:47:35,668 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-04-17 18:47:35,668 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 21
[2020-04-17 18:47:35,668 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:35,669 INFO  L225             Difference]: With dead ends: 98
[2020-04-17 18:47:35,669 INFO  L226             Difference]: Without dead ends: 92
[2020-04-17 18:47:35,669 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992
[2020-04-17 18:47:35,670 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2020-04-17 18:47:35,671 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60.
[2020-04-17 18:47:35,671 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 60 states.
[2020-04-17 18:47:35,672 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions.
[2020-04-17 18:47:35,672 INFO  L78                 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21
[2020-04-17 18:47:35,672 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:35,672 INFO  L479      AbstractCegarLoop]: Abstraction has 60 states and 147 transitions.
[2020-04-17 18:47:35,672 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:35,672 INFO  L276                IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions.
[2020-04-17 18:47:35,673 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:35,673 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:35,673 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:35,876 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:35,876 INFO  L427      AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:35,876 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:35,876 INFO  L82        PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times
[2020-04-17 18:47:35,876 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:35,877 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819084449]
[2020-04-17 18:47:35,877 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:35,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:36,021 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:36,021 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819084449]
[2020-04-17 18:47:36,022 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503608625]
[2020-04-17 18:47:36,022 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:36,067 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:36,068 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:36,069 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:36,077 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:36,077 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:36,077 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2020-04-17 18:47:36,077 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982960325]
[2020-04-17 18:47:36,078 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:36,078 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:36,078 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:36,078 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:36,078 INFO  L87              Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states.
[2020-04-17 18:47:36,399 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:36,400 INFO  L93              Difference]: Finished difference Result 99 states and 227 transitions.
[2020-04-17 18:47:36,400 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-04-17 18:47:36,400 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 21
[2020-04-17 18:47:36,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:36,401 INFO  L225             Difference]: With dead ends: 99
[2020-04-17 18:47:36,401 INFO  L226             Difference]: Without dead ends: 93
[2020-04-17 18:47:36,402 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056
[2020-04-17 18:47:36,402 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2020-04-17 18:47:36,403 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63.
[2020-04-17 18:47:36,403 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 63 states.
[2020-04-17 18:47:36,404 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions.
[2020-04-17 18:47:36,404 INFO  L78                 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21
[2020-04-17 18:47:36,404 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:36,404 INFO  L479      AbstractCegarLoop]: Abstraction has 63 states and 155 transitions.
[2020-04-17 18:47:36,404 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:36,404 INFO  L276                IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions.
[2020-04-17 18:47:36,405 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:36,405 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:36,405 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:36,605 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:36,606 INFO  L427      AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:36,606 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:36,606 INFO  L82        PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times
[2020-04-17 18:47:36,606 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:36,607 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212027199]
[2020-04-17 18:47:36,607 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:36,611 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:36,765 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:36,765 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212027199]
[2020-04-17 18:47:36,765 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712723527]
[2020-04-17 18:47:36,765 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:36,810 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:36,811 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:36,811 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:36,812 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:36,835 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:36,841 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:36,842 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:36,842 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16
[2020-04-17 18:47:36,842 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155489335]
[2020-04-17 18:47:36,842 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:36,842 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:36,842 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:36,842 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:36,842 INFO  L87              Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states.
[2020-04-17 18:47:37,206 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:37,207 INFO  L93              Difference]: Finished difference Result 109 states and 247 transitions.
[2020-04-17 18:47:37,207 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-04-17 18:47:37,207 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 21
[2020-04-17 18:47:37,207 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:37,208 INFO  L225             Difference]: With dead ends: 109
[2020-04-17 18:47:37,208 INFO  L226             Difference]: Without dead ends: 103
[2020-04-17 18:47:37,209 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190
[2020-04-17 18:47:37,209 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 103 states.
[2020-04-17 18:47:37,210 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62.
[2020-04-17 18:47:37,210 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-04-17 18:47:37,211 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions.
[2020-04-17 18:47:37,211 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21
[2020-04-17 18:47:37,211 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:37,211 INFO  L479      AbstractCegarLoop]: Abstraction has 62 states and 153 transitions.
[2020-04-17 18:47:37,211 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:37,211 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions.
[2020-04-17 18:47:37,212 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:37,212 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:37,212 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:37,412 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:37,413 INFO  L427      AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:37,413 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:37,413 INFO  L82        PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times
[2020-04-17 18:47:37,414 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:37,414 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029663904]
[2020-04-17 18:47:37,414 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:37,419 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:37,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:37,587 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029663904]
[2020-04-17 18:47:37,588 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780666211]
[2020-04-17 18:47:37,588 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:37,640 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2020-04-17 18:47:37,640 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:37,641 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:37,642 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:37,657 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:37,657 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:37,658 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2020-04-17 18:47:37,658 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417683165]
[2020-04-17 18:47:37,660 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:37,660 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:37,660 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:37,661 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:37,661 INFO  L87              Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states.
[2020-04-17 18:47:37,990 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:37,990 INFO  L93              Difference]: Finished difference Result 109 states and 249 transitions.
[2020-04-17 18:47:37,991 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:47:37,991 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 21
[2020-04-17 18:47:37,991 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:37,992 INFO  L225             Difference]: With dead ends: 109
[2020-04-17 18:47:37,992 INFO  L226             Difference]: Without dead ends: 103
[2020-04-17 18:47:37,993 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260
[2020-04-17 18:47:37,993 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 103 states.
[2020-04-17 18:47:37,995 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65.
[2020-04-17 18:47:37,995 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 65 states.
[2020-04-17 18:47:37,995 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions.
[2020-04-17 18:47:37,995 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21
[2020-04-17 18:47:37,995 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:37,996 INFO  L479      AbstractCegarLoop]: Abstraction has 65 states and 161 transitions.
[2020-04-17 18:47:37,996 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:37,996 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions.
[2020-04-17 18:47:37,996 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:37,996 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:37,996 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:38,199 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:38,200 INFO  L427      AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:38,200 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:38,201 INFO  L82        PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times
[2020-04-17 18:47:38,201 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:38,201 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81594742]
[2020-04-17 18:47:38,201 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:38,206 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:38,332 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:38,332 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81594742]
[2020-04-17 18:47:38,333 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133735047]
[2020-04-17 18:47:38,333 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:38,376 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:38,377 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:38,378 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:38,378 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:38,397 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:38,405 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:38,405 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:38,405 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16
[2020-04-17 18:47:38,405 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966752018]
[2020-04-17 18:47:38,405 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:38,405 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:38,406 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:38,406 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:38,406 INFO  L87              Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states.
[2020-04-17 18:47:38,807 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:38,807 INFO  L93              Difference]: Finished difference Result 106 states and 243 transitions.
[2020-04-17 18:47:38,807 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-04-17 18:47:38,807 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 21
[2020-04-17 18:47:38,808 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:38,809 INFO  L225             Difference]: With dead ends: 106
[2020-04-17 18:47:38,809 INFO  L226             Difference]: Without dead ends: 100
[2020-04-17 18:47:38,809 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332
[2020-04-17 18:47:38,809 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2020-04-17 18:47:38,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64.
[2020-04-17 18:47:38,811 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 64 states.
[2020-04-17 18:47:38,811 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions.
[2020-04-17 18:47:38,811 INFO  L78                 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21
[2020-04-17 18:47:38,811 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:38,812 INFO  L479      AbstractCegarLoop]: Abstraction has 64 states and 159 transitions.
[2020-04-17 18:47:38,812 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:38,812 INFO  L276                IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions.
[2020-04-17 18:47:38,812 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:38,812 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:38,812 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:39,015 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:39,015 INFO  L427      AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:39,016 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:39,016 INFO  L82        PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times
[2020-04-17 18:47:39,016 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:39,016 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576424516]
[2020-04-17 18:47:39,017 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:39,021 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:39,183 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:39,183 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576424516]
[2020-04-17 18:47:39,183 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025722820]
[2020-04-17 18:47:39,184 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:39,268 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s)
[2020-04-17 18:47:39,268 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:39,270 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:39,271 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:39,288 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:39,289 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:39,289 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2020-04-17 18:47:39,289 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991833554]
[2020-04-17 18:47:39,290 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:39,290 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:39,290 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:39,290 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:39,291 INFO  L87              Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states.
[2020-04-17 18:47:39,868 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:39,868 INFO  L93              Difference]: Finished difference Result 107 states and 247 transitions.
[2020-04-17 18:47:39,869 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-04-17 18:47:39,869 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 21
[2020-04-17 18:47:39,869 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:39,870 INFO  L225             Difference]: With dead ends: 107
[2020-04-17 18:47:39,870 INFO  L226             Difference]: Without dead ends: 101
[2020-04-17 18:47:39,870 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406
[2020-04-17 18:47:39,871 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-04-17 18:47:39,873 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67.
[2020-04-17 18:47:39,873 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 67 states.
[2020-04-17 18:47:39,873 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions.
[2020-04-17 18:47:39,874 INFO  L78                 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21
[2020-04-17 18:47:39,874 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:39,874 INFO  L479      AbstractCegarLoop]: Abstraction has 67 states and 167 transitions.
[2020-04-17 18:47:39,874 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:39,874 INFO  L276                IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions.
[2020-04-17 18:47:39,875 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:39,875 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:39,875 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:40,079 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:40,080 INFO  L427      AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:40,080 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:40,080 INFO  L82        PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times
[2020-04-17 18:47:40,081 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:40,081 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328397085]
[2020-04-17 18:47:40,081 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:40,088 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:40,300 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:40,300 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328397085]
[2020-04-17 18:47:40,300 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930905072]
[2020-04-17 18:47:40,301 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:40,385 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s)
[2020-04-17 18:47:40,385 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:40,386 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:40,388 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:40,414 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:40,427 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:40,427 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:40,427 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16
[2020-04-17 18:47:40,427 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365539280]
[2020-04-17 18:47:40,427 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:40,428 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:40,428 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:40,428 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:40,428 INFO  L87              Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states.
[2020-04-17 18:47:40,967 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:40,968 INFO  L93              Difference]: Finished difference Result 104 states and 241 transitions.
[2020-04-17 18:47:40,968 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:47:40,968 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 21
[2020-04-17 18:47:40,968 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:40,969 INFO  L225             Difference]: With dead ends: 104
[2020-04-17 18:47:40,969 INFO  L226             Difference]: Without dead ends: 98
[2020-04-17 18:47:40,969 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482
[2020-04-17 18:47:40,970 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-04-17 18:47:40,971 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66.
[2020-04-17 18:47:40,971 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2020-04-17 18:47:40,971 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions.
[2020-04-17 18:47:40,972 INFO  L78                 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21
[2020-04-17 18:47:40,972 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:40,972 INFO  L479      AbstractCegarLoop]: Abstraction has 66 states and 165 transitions.
[2020-04-17 18:47:40,972 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:40,972 INFO  L276                IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions.
[2020-04-17 18:47:40,972 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:40,973 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:40,973 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:41,175 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:41,176 INFO  L427      AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:41,176 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:41,176 INFO  L82        PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times
[2020-04-17 18:47:41,176 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:41,176 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723661634]
[2020-04-17 18:47:41,176 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:41,180 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:41,305 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:41,306 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723661634]
[2020-04-17 18:47:41,306 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985133009]
[2020-04-17 18:47:41,306 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:41,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:41,352 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:41,353 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:41,364 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:41,365 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:41,365 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2020-04-17 18:47:41,365 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775700977]
[2020-04-17 18:47:41,365 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:41,365 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:41,366 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:41,366 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:41,366 INFO  L87              Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states.
[2020-04-17 18:47:41,795 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:41,795 INFO  L93              Difference]: Finished difference Result 105 states and 245 transitions.
[2020-04-17 18:47:41,795 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:47:41,795 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 21
[2020-04-17 18:47:41,796 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:41,796 INFO  L225             Difference]: With dead ends: 105
[2020-04-17 18:47:41,797 INFO  L226             Difference]: Without dead ends: 99
[2020-04-17 18:47:41,797 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560
[2020-04-17 18:47:41,798 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2020-04-17 18:47:41,799 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69.
[2020-04-17 18:47:41,799 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2020-04-17 18:47:41,799 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions.
[2020-04-17 18:47:41,800 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21
[2020-04-17 18:47:41,800 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:41,800 INFO  L479      AbstractCegarLoop]: Abstraction has 69 states and 173 transitions.
[2020-04-17 18:47:41,800 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:41,800 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions.
[2020-04-17 18:47:41,800 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:41,801 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:41,801 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:42,003 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:42,004 INFO  L427      AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:42,004 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:42,004 INFO  L82        PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times
[2020-04-17 18:47:42,005 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:42,005 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910614272]
[2020-04-17 18:47:42,005 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:42,010 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:42,115 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:42,115 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910614272]
[2020-04-17 18:47:42,115 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063996743]
[2020-04-17 18:47:42,116 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:42,160 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:42,160 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:42,161 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:42,162 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:42,175 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:42,184 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:42,184 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:42,184 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16
[2020-04-17 18:47:42,184 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055657669]
[2020-04-17 18:47:42,184 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:42,185 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:42,185 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:42,185 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:42,185 INFO  L87              Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states.
[2020-04-17 18:47:42,730 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:42,730 INFO  L93              Difference]: Finished difference Result 102 states and 239 transitions.
[2020-04-17 18:47:42,730 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:47:42,731 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 21
[2020-04-17 18:47:42,731 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:42,731 INFO  L225             Difference]: With dead ends: 102
[2020-04-17 18:47:42,731 INFO  L226             Difference]: Without dead ends: 96
[2020-04-17 18:47:42,732 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640
[2020-04-17 18:47:42,732 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-04-17 18:47:42,734 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68.
[2020-04-17 18:47:42,734 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68 states.
[2020-04-17 18:47:42,734 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions.
[2020-04-17 18:47:42,735 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21
[2020-04-17 18:47:42,735 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:42,735 INFO  L479      AbstractCegarLoop]: Abstraction has 68 states and 171 transitions.
[2020-04-17 18:47:42,735 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:42,735 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions.
[2020-04-17 18:47:42,735 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:42,736 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:42,736 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:42,938 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:42,939 INFO  L427      AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:42,939 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:42,940 INFO  L82        PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times
[2020-04-17 18:47:42,940 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:42,940 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253700849]
[2020-04-17 18:47:42,941 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:42,946 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:43,051 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:43,051 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253700849]
[2020-04-17 18:47:43,051 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362391915]
[2020-04-17 18:47:43,051 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:43,101 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2020-04-17 18:47:43,101 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:43,102 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:43,103 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:43,115 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:43,115 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:43,115 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2020-04-17 18:47:43,115 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390040729]
[2020-04-17 18:47:43,116 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:43,116 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:43,116 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:43,116 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:43,116 INFO  L87              Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states.
[2020-04-17 18:47:43,577 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:43,577 INFO  L93              Difference]: Finished difference Result 103 states and 243 transitions.
[2020-04-17 18:47:43,578 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-04-17 18:47:43,578 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 21
[2020-04-17 18:47:43,578 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:43,579 INFO  L225             Difference]: With dead ends: 103
[2020-04-17 18:47:43,579 INFO  L226             Difference]: Without dead ends: 97
[2020-04-17 18:47:43,579 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722
[2020-04-17 18:47:43,580 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2020-04-17 18:47:43,581 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71.
[2020-04-17 18:47:43,581 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 71 states.
[2020-04-17 18:47:43,581 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions.
[2020-04-17 18:47:43,582 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21
[2020-04-17 18:47:43,582 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:43,582 INFO  L479      AbstractCegarLoop]: Abstraction has 71 states and 179 transitions.
[2020-04-17 18:47:43,582 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:43,582 INFO  L276                IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions.
[2020-04-17 18:47:43,582 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:43,582 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:43,582 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:43,784 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:43,784 INFO  L427      AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:43,784 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:43,785 INFO  L82        PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times
[2020-04-17 18:47:43,785 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:43,785 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380230589]
[2020-04-17 18:47:43,785 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:43,790 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:43,902 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:43,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380230589]
[2020-04-17 18:47:43,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065616973]
[2020-04-17 18:47:43,902 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:43,947 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:43,948 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:43,952 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:43,952 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:43,965 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:43,974 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:43,974 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:43,974 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16
[2020-04-17 18:47:43,975 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797171132]
[2020-04-17 18:47:43,975 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:43,975 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:43,975 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:43,975 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:43,975 INFO  L87              Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states.
[2020-04-17 18:47:44,582 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:44,582 INFO  L93              Difference]: Finished difference Result 100 states and 237 transitions.
[2020-04-17 18:47:44,583 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-04-17 18:47:44,583 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 21
[2020-04-17 18:47:44,583 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:44,583 INFO  L225             Difference]: With dead ends: 100
[2020-04-17 18:47:44,583 INFO  L226             Difference]: Without dead ends: 94
[2020-04-17 18:47:44,584 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806
[2020-04-17 18:47:44,584 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2020-04-17 18:47:44,586 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70.
[2020-04-17 18:47:44,586 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-04-17 18:47:44,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions.
[2020-04-17 18:47:44,587 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21
[2020-04-17 18:47:44,587 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:44,587 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 177 transitions.
[2020-04-17 18:47:44,587 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:44,587 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions.
[2020-04-17 18:47:44,587 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:44,588 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:44,588 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:44,790 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:44,791 INFO  L427      AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:44,791 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:44,791 INFO  L82        PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times
[2020-04-17 18:47:44,792 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:44,792 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672480009]
[2020-04-17 18:47:44,792 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:44,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:44,952 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:44,952 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672480009]
[2020-04-17 18:47:44,952 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163361178]
[2020-04-17 18:47:44,952 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:45,036 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s)
[2020-04-17 18:47:45,037 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:45,038 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:45,039 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:45,078 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:45,079 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:45,079 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15
[2020-04-17 18:47:45,079 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813090247]
[2020-04-17 18:47:45,080 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-04-17 18:47:45,080 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:45,080 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-04-17 18:47:45,080 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272
[2020-04-17 18:47:45,081 INFO  L87              Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states.
[2020-04-17 18:47:45,711 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:45,711 INFO  L93              Difference]: Finished difference Result 120 states and 287 transitions.
[2020-04-17 18:47:45,712 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-04-17 18:47:45,712 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 21
[2020-04-17 18:47:45,712 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:45,712 INFO  L225             Difference]: With dead ends: 120
[2020-04-17 18:47:45,713 INFO  L226             Difference]: Without dead ends: 114
[2020-04-17 18:47:45,713 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892
[2020-04-17 18:47:45,713 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 114 states.
[2020-04-17 18:47:45,714 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76.
[2020-04-17 18:47:45,715 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 76 states.
[2020-04-17 18:47:45,715 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions.
[2020-04-17 18:47:45,715 INFO  L78                 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21
[2020-04-17 18:47:45,715 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:45,715 INFO  L479      AbstractCegarLoop]: Abstraction has 76 states and 197 transitions.
[2020-04-17 18:47:45,715 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-04-17 18:47:45,716 INFO  L276                IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions.
[2020-04-17 18:47:45,716 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-04-17 18:47:45,716 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:45,716 INFO  L425         BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:45,919 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:45,919 INFO  L427      AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:45,920 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:45,920 INFO  L82        PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times
[2020-04-17 18:47:45,920 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:45,921 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692333737]
[2020-04-17 18:47:45,921 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:45,928 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:46,106 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:46,107 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692333737]
[2020-04-17 18:47:46,107 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503223296]
[2020-04-17 18:47:46,107 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:46,186 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s)
[2020-04-17 18:47:46,186 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:46,188 INFO  L264         TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core
[2020-04-17 18:47:46,189 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:46,216 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:46,247 INFO  L134       CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:46,248 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:46,248 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16
[2020-04-17 18:47:46,248 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279784071]
[2020-04-17 18:47:46,248 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:46,249 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:46,249 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:46,249 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:46,249 INFO  L87              Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states.
[2020-04-17 18:47:47,038 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:47,039 INFO  L93              Difference]: Finished difference Result 101 states and 243 transitions.
[2020-04-17 18:47:47,039 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-04-17 18:47:47,039 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 21
[2020-04-17 18:47:47,039 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:47,040 INFO  L225             Difference]: With dead ends: 101
[2020-04-17 18:47:47,040 INFO  L226             Difference]: Without dead ends: 93
[2020-04-17 18:47:47,040 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980
[2020-04-17 18:47:47,041 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2020-04-17 18:47:47,042 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73.
[2020-04-17 18:47:47,042 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 73 states.
[2020-04-17 18:47:47,042 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions.
[2020-04-17 18:47:47,042 INFO  L78                 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21
[2020-04-17 18:47:47,043 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:47,043 INFO  L479      AbstractCegarLoop]: Abstraction has 73 states and 185 transitions.
[2020-04-17 18:47:47,043 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:47,043 INFO  L276                IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions.
[2020-04-17 18:47:47,043 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:47,043 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:47,043 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:47,243 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:47,244 INFO  L427      AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:47,244 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:47,245 INFO  L82        PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times
[2020-04-17 18:47:47,245 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:47,245 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17724980]
[2020-04-17 18:47:47,245 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:47,250 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:47,398 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:47,398 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17724980]
[2020-04-17 18:47:47,398 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11230741]
[2020-04-17 18:47:47,398 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:47,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:47,445 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:47,447 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:47,460 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:47,460 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:47,460 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16
[2020-04-17 18:47:47,460 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604574174]
[2020-04-17 18:47:47,461 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:47,461 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:47,461 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:47,461 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:47,461 INFO  L87              Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states.
[2020-04-17 18:47:47,753 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:47,754 INFO  L93              Difference]: Finished difference Result 114 states and 267 transitions.
[2020-04-17 18:47:47,754 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:47:47,754 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 22
[2020-04-17 18:47:47,754 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:47,755 INFO  L225             Difference]: With dead ends: 114
[2020-04-17 18:47:47,755 INFO  L226             Difference]: Without dead ends: 108
[2020-04-17 18:47:47,755 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056
[2020-04-17 18:47:47,756 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 108 states.
[2020-04-17 18:47:47,757 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75.
[2020-04-17 18:47:47,757 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-04-17 18:47:47,757 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions.
[2020-04-17 18:47:47,757 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22
[2020-04-17 18:47:47,758 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:47,758 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 189 transitions.
[2020-04-17 18:47:47,758 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:47,758 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions.
[2020-04-17 18:47:47,760 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:47,760 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:47,760 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:47,963 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:47,964 INFO  L427      AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:47,964 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:47,964 INFO  L82        PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times
[2020-04-17 18:47:47,965 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:47,965 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92682677]
[2020-04-17 18:47:47,965 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:47,970 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:48,124 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:48,124 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92682677]
[2020-04-17 18:47:48,124 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725016206]
[2020-04-17 18:47:48,124 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:48,171 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:48,171 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:48,172 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:48,173 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:48,185 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:48,192 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:48,192 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:48,192 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17
[2020-04-17 18:47:48,192 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740556791]
[2020-04-17 18:47:48,193 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:47:48,193 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:48,193 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:47:48,193 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:47:48,193 INFO  L87              Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states.
[2020-04-17 18:47:48,558 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:48,558 INFO  L93              Difference]: Finished difference Result 111 states and 261 transitions.
[2020-04-17 18:47:48,558 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-04-17 18:47:48,559 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 22
[2020-04-17 18:47:48,559 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:48,559 INFO  L225             Difference]: With dead ends: 111
[2020-04-17 18:47:48,559 INFO  L226             Difference]: Without dead ends: 105
[2020-04-17 18:47:48,560 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260
[2020-04-17 18:47:48,560 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 105 states.
[2020-04-17 18:47:48,561 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74.
[2020-04-17 18:47:48,561 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:47:48,562 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions.
[2020-04-17 18:47:48,562 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22
[2020-04-17 18:47:48,562 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:48,562 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 187 transitions.
[2020-04-17 18:47:48,562 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:47:48,562 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions.
[2020-04-17 18:47:48,562 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:48,563 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:48,563 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:48,766 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:48,766 INFO  L427      AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:48,767 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:48,767 INFO  L82        PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times
[2020-04-17 18:47:48,767 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:48,768 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603638441]
[2020-04-17 18:47:48,768 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:48,772 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:48,910 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:48,911 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603638441]
[2020-04-17 18:47:48,911 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442749925]
[2020-04-17 18:47:48,911 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:48,960 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2020-04-17 18:47:48,960 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:48,960 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:48,961 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:48,969 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:48,969 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:48,969 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16
[2020-04-17 18:47:48,969 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858955445]
[2020-04-17 18:47:48,969 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:48,969 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:48,970 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:48,970 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:48,970 INFO  L87              Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states.
[2020-04-17 18:47:49,302 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:49,302 INFO  L93              Difference]: Finished difference Result 108 states and 255 transitions.
[2020-04-17 18:47:49,303 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-04-17 18:47:49,303 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 22
[2020-04-17 18:47:49,303 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:49,303 INFO  L225             Difference]: With dead ends: 108
[2020-04-17 18:47:49,304 INFO  L226             Difference]: Without dead ends: 102
[2020-04-17 18:47:49,304 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190
[2020-04-17 18:47:49,304 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 102 states.
[2020-04-17 18:47:49,305 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75.
[2020-04-17 18:47:49,306 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-04-17 18:47:49,306 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions.
[2020-04-17 18:47:49,306 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22
[2020-04-17 18:47:49,306 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:49,306 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 189 transitions.
[2020-04-17 18:47:49,307 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:49,307 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions.
[2020-04-17 18:47:49,307 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:49,307 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:49,307 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:49,510 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:49,510 INFO  L427      AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:49,511 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:49,511 INFO  L82        PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times
[2020-04-17 18:47:49,511 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:49,512 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704894067]
[2020-04-17 18:47:49,512 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:49,516 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:49,713 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:49,713 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704894067]
[2020-04-17 18:47:49,713 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637961500]
[2020-04-17 18:47:49,713 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:49,792 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:49,792 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:49,794 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:49,794 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:49,839 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:49,850 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:49,850 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:49,850 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17
[2020-04-17 18:47:49,850 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031947098]
[2020-04-17 18:47:49,851 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:47:49,851 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:49,851 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:47:49,851 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:47:49,852 INFO  L87              Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states.
[2020-04-17 18:47:50,379 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:50,380 INFO  L93              Difference]: Finished difference Result 107 states and 253 transitions.
[2020-04-17 18:47:50,380 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-04-17 18:47:50,380 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 22
[2020-04-17 18:47:50,380 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:50,380 INFO  L225             Difference]: With dead ends: 107
[2020-04-17 18:47:50,381 INFO  L226             Difference]: Without dead ends: 101
[2020-04-17 18:47:50,381 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406
[2020-04-17 18:47:50,381 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-04-17 18:47:50,382 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74.
[2020-04-17 18:47:50,382 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:47:50,383 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions.
[2020-04-17 18:47:50,383 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22
[2020-04-17 18:47:50,383 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:50,383 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 187 transitions.
[2020-04-17 18:47:50,383 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:47:50,383 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions.
[2020-04-17 18:47:50,383 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:50,384 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:50,384 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:50,587 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:50,587 INFO  L427      AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:50,588 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:50,588 INFO  L82        PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times
[2020-04-17 18:47:50,588 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:50,588 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296954901]
[2020-04-17 18:47:50,589 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:50,593 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:50,723 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:50,724 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296954901]
[2020-04-17 18:47:50,724 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035054318]
[2020-04-17 18:47:50,724 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:50,773 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s)
[2020-04-17 18:47:50,773 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:50,774 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:50,775 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:50,784 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:50,784 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:50,784 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16
[2020-04-17 18:47:50,784 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6104601]
[2020-04-17 18:47:50,784 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:50,784 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:50,784 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:50,784 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:50,785 INFO  L87              Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states.
[2020-04-17 18:47:51,157 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:51,157 INFO  L93              Difference]: Finished difference Result 104 states and 247 transitions.
[2020-04-17 18:47:51,158 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:47:51,158 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 22
[2020-04-17 18:47:51,158 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:51,158 INFO  L225             Difference]: With dead ends: 104
[2020-04-17 18:47:51,158 INFO  L226             Difference]: Without dead ends: 98
[2020-04-17 18:47:51,159 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332
[2020-04-17 18:47:51,159 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-04-17 18:47:51,160 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75.
[2020-04-17 18:47:51,160 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-04-17 18:47:51,161 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions.
[2020-04-17 18:47:51,161 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22
[2020-04-17 18:47:51,161 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:51,161 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 189 transitions.
[2020-04-17 18:47:51,161 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:51,161 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions.
[2020-04-17 18:47:51,162 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:51,162 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:51,162 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:51,362 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:51,363 INFO  L427      AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:51,363 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:51,363 INFO  L82        PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times
[2020-04-17 18:47:51,364 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:51,364 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407354342]
[2020-04-17 18:47:51,364 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:51,369 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:51,503 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:51,503 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407354342]
[2020-04-17 18:47:51,504 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357563683]
[2020-04-17 18:47:51,504 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:51,552 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s)
[2020-04-17 18:47:51,553 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:51,553 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:51,554 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:51,567 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:51,574 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:51,575 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:51,575 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17
[2020-04-17 18:47:51,575 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995061953]
[2020-04-17 18:47:51,575 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:47:51,575 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:51,575 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:47:51,576 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:47:51,576 INFO  L87              Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states.
[2020-04-17 18:47:52,057 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:52,057 INFO  L93              Difference]: Finished difference Result 103 states and 245 transitions.
[2020-04-17 18:47:52,058 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:47:52,058 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 22
[2020-04-17 18:47:52,058 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:52,058 INFO  L225             Difference]: With dead ends: 103
[2020-04-17 18:47:52,059 INFO  L226             Difference]: Without dead ends: 97
[2020-04-17 18:47:52,059 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560
[2020-04-17 18:47:52,060 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 97 states.
[2020-04-17 18:47:52,061 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74.
[2020-04-17 18:47:52,061 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:47:52,061 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions.
[2020-04-17 18:47:52,062 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22
[2020-04-17 18:47:52,062 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:52,062 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 187 transitions.
[2020-04-17 18:47:52,062 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:47:52,062 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions.
[2020-04-17 18:47:52,062 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:52,062 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:52,062 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:52,265 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:52,266 INFO  L427      AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:52,266 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:52,266 INFO  L82        PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times
[2020-04-17 18:47:52,267 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:52,267 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405399894]
[2020-04-17 18:47:52,267 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:52,273 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:52,397 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:52,398 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405399894]
[2020-04-17 18:47:52,398 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987573080]
[2020-04-17 18:47:52,398 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:52,445 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:52,446 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:52,447 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:52,456 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:52,456 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:52,456 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16
[2020-04-17 18:47:52,456 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327204955]
[2020-04-17 18:47:52,457 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:52,457 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:52,457 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:52,457 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:52,457 INFO  L87              Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states.
[2020-04-17 18:47:52,876 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:52,876 INFO  L93              Difference]: Finished difference Result 100 states and 239 transitions.
[2020-04-17 18:47:52,876 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-04-17 18:47:52,877 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 22
[2020-04-17 18:47:52,877 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:52,877 INFO  L225             Difference]: With dead ends: 100
[2020-04-17 18:47:52,877 INFO  L226             Difference]: Without dead ends: 94
[2020-04-17 18:47:52,878 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482
[2020-04-17 18:47:52,878 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2020-04-17 18:47:52,879 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75.
[2020-04-17 18:47:52,880 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-04-17 18:47:52,880 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions.
[2020-04-17 18:47:52,881 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22
[2020-04-17 18:47:52,881 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:52,881 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 189 transitions.
[2020-04-17 18:47:52,881 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:52,881 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions.
[2020-04-17 18:47:52,882 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:52,882 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:52,882 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:53,085 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:53,085 INFO  L427      AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:53,086 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:53,086 INFO  L82        PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times
[2020-04-17 18:47:53,087 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:53,087 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607890354]
[2020-04-17 18:47:53,087 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:53,097 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:53,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:53,223 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607890354]
[2020-04-17 18:47:53,224 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287120370]
[2020-04-17 18:47:53,224 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:53,270 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:53,270 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:53,271 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:53,272 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:53,286 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:53,294 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:53,295 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:53,295 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17
[2020-04-17 18:47:53,295 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877546334]
[2020-04-17 18:47:53,295 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:47:53,295 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:53,295 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:47:53,295 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:47:53,295 INFO  L87              Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states.
[2020-04-17 18:47:53,846 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:53,847 INFO  L93              Difference]: Finished difference Result 99 states and 237 transitions.
[2020-04-17 18:47:53,847 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:47:53,847 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 22
[2020-04-17 18:47:53,848 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:53,848 INFO  L225             Difference]: With dead ends: 99
[2020-04-17 18:47:53,848 INFO  L226             Difference]: Without dead ends: 93
[2020-04-17 18:47:53,849 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722
[2020-04-17 18:47:53,849 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 93 states.
[2020-04-17 18:47:53,850 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74.
[2020-04-17 18:47:53,850 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:47:53,851 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions.
[2020-04-17 18:47:53,851 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22
[2020-04-17 18:47:53,851 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:53,851 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 187 transitions.
[2020-04-17 18:47:53,851 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:47:53,851 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions.
[2020-04-17 18:47:53,852 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:53,852 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:53,852 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:54,055 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:54,056 INFO  L427      AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:54,056 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:54,057 INFO  L82        PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times
[2020-04-17 18:47:54,057 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:54,057 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626867230]
[2020-04-17 18:47:54,058 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:54,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:54,197 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:54,198 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626867230]
[2020-04-17 18:47:54,198 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793196637]
[2020-04-17 18:47:54,198 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:54,247 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2020-04-17 18:47:54,247 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:54,248 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:54,248 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:54,259 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:54,259 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:54,259 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16
[2020-04-17 18:47:54,259 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559693407]
[2020-04-17 18:47:54,259 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:54,259 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:54,260 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:54,260 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:54,260 INFO  L87              Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states.
[2020-04-17 18:47:54,708 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:54,708 INFO  L93              Difference]: Finished difference Result 96 states and 231 transitions.
[2020-04-17 18:47:54,708 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:47:54,708 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 22
[2020-04-17 18:47:54,709 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:54,709 INFO  L225             Difference]: With dead ends: 96
[2020-04-17 18:47:54,709 INFO  L226             Difference]: Without dead ends: 90
[2020-04-17 18:47:54,709 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640
[2020-04-17 18:47:54,710 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2020-04-17 18:47:54,711 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75.
[2020-04-17 18:47:54,711 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-04-17 18:47:54,712 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions.
[2020-04-17 18:47:54,712 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22
[2020-04-17 18:47:54,712 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:54,712 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 189 transitions.
[2020-04-17 18:47:54,712 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:54,713 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions.
[2020-04-17 18:47:54,713 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:54,713 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:54,713 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:54,915 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:54,916 INFO  L427      AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:54,916 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:54,916 INFO  L82        PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times
[2020-04-17 18:47:54,916 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:54,917 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150592810]
[2020-04-17 18:47:54,917 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:54,922 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:55,039 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:55,039 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150592810]
[2020-04-17 18:47:55,039 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54689812]
[2020-04-17 18:47:55,039 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:55,086 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:47:55,086 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:55,087 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:55,087 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:55,110 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:47:55,118 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:55,119 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:55,119 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17
[2020-04-17 18:47:55,119 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571373118]
[2020-04-17 18:47:55,119 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:47:55,119 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:55,119 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:47:55,119 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:47:55,119 INFO  L87              Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states.
[2020-04-17 18:47:55,730 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:55,730 INFO  L93              Difference]: Finished difference Result 95 states and 229 transitions.
[2020-04-17 18:47:55,731 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-04-17 18:47:55,731 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 22
[2020-04-17 18:47:55,731 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:55,731 INFO  L225             Difference]: With dead ends: 95
[2020-04-17 18:47:55,732 INFO  L226             Difference]: Without dead ends: 89
[2020-04-17 18:47:55,732 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892
[2020-04-17 18:47:55,732 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 89 states.
[2020-04-17 18:47:55,733 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74.
[2020-04-17 18:47:55,733 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:47:55,734 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions.
[2020-04-17 18:47:55,734 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22
[2020-04-17 18:47:55,734 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:55,734 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 187 transitions.
[2020-04-17 18:47:55,734 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:47:55,735 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions.
[2020-04-17 18:47:55,735 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:55,735 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:55,735 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:55,936 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:55,936 INFO  L427      AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:55,936 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:55,937 INFO  L82        PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times
[2020-04-17 18:47:55,937 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:55,937 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124167879]
[2020-04-17 18:47:55,937 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:55,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:56,080 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:56,080 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124167879]
[2020-04-17 18:47:56,081 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150502856]
[2020-04-17 18:47:56,081 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:56,141 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s)
[2020-04-17 18:47:56,142 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:56,142 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:56,143 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:56,175 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:56,175 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:56,175 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16
[2020-04-17 18:47:56,176 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684543907]
[2020-04-17 18:47:56,176 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:56,176 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:56,176 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:56,177 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:56,177 INFO  L87              Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states.
[2020-04-17 18:47:56,728 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:56,729 INFO  L93              Difference]: Finished difference Result 92 states and 223 transitions.
[2020-04-17 18:47:56,729 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-04-17 18:47:56,729 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 22
[2020-04-17 18:47:56,729 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:56,730 INFO  L225             Difference]: With dead ends: 92
[2020-04-17 18:47:56,730 INFO  L226             Difference]: Without dead ends: 86
[2020-04-17 18:47:56,730 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806
[2020-04-17 18:47:56,730 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2020-04-17 18:47:56,732 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75.
[2020-04-17 18:47:56,732 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-04-17 18:47:56,733 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions.
[2020-04-17 18:47:56,733 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22
[2020-04-17 18:47:56,733 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:56,734 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 189 transitions.
[2020-04-17 18:47:56,734 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:56,734 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions.
[2020-04-17 18:47:56,734 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:56,734 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:56,735 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:56,938 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:56,938 INFO  L427      AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:56,938 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:56,939 INFO  L82        PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times
[2020-04-17 18:47:56,939 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:56,939 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973569753]
[2020-04-17 18:47:56,939 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:56,944 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:57,054 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:57,055 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973569753]
[2020-04-17 18:47:57,055 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659785151]
[2020-04-17 18:47:57,055 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:57,103 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s)
[2020-04-17 18:47:57,103 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:57,105 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:47:57,114 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:57,141 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:57,141 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:57,141 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17
[2020-04-17 18:47:57,141 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414676926]
[2020-04-17 18:47:57,142 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:47:57,142 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:57,142 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:47:57,142 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:47:57,142 INFO  L87              Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states.
[2020-04-17 18:47:57,749 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:57,750 INFO  L93              Difference]: Finished difference Result 89 states and 217 transitions.
[2020-04-17 18:47:57,750 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-04-17 18:47:57,750 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 22
[2020-04-17 18:47:57,750 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:57,751 INFO  L225             Difference]: With dead ends: 89
[2020-04-17 18:47:57,751 INFO  L226             Difference]: Without dead ends: 83
[2020-04-17 18:47:57,751 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1382, Unknown=0, NotChecked=0, Total=1892
[2020-04-17 18:47:57,752 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 83 states.
[2020-04-17 18:47:57,753 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74.
[2020-04-17 18:47:57,753 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:47:57,753 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions.
[2020-04-17 18:47:57,753 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22
[2020-04-17 18:47:57,754 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:57,754 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 187 transitions.
[2020-04-17 18:47:57,754 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:47:57,754 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions.
[2020-04-17 18:47:57,754 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:57,754 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:57,754 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:57,955 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:57,955 INFO  L427      AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:57,956 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:57,956 INFO  L82        PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times
[2020-04-17 18:47:57,956 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:57,956 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338355243]
[2020-04-17 18:47:57,957 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:57,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:58,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:58,072 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338355243]
[2020-04-17 18:47:58,072 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038969429]
[2020-04-17 18:47:58,073 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:58,118 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:58,119 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:47:58,119 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:58,141 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:58,142 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:58,142 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16
[2020-04-17 18:47:58,142 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489547645]
[2020-04-17 18:47:58,142 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-04-17 18:47:58,142 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:58,143 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-04-17 18:47:58,143 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306
[2020-04-17 18:47:58,143 INFO  L87              Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states.
[2020-04-17 18:47:58,770 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:58,771 INFO  L93              Difference]: Finished difference Result 107 states and 261 transitions.
[2020-04-17 18:47:58,771 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-04-17 18:47:58,771 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 22
[2020-04-17 18:47:58,771 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:58,772 INFO  L225             Difference]: With dead ends: 107
[2020-04-17 18:47:58,772 INFO  L226             Difference]: Without dead ends: 101
[2020-04-17 18:47:58,772 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980
[2020-04-17 18:47:58,773 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-04-17 18:47:58,774 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78.
[2020-04-17 18:47:58,774 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 78 states.
[2020-04-17 18:47:58,774 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions.
[2020-04-17 18:47:58,774 INFO  L78                 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22
[2020-04-17 18:47:58,775 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:58,775 INFO  L479      AbstractCegarLoop]: Abstraction has 78 states and 201 transitions.
[2020-04-17 18:47:58,775 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-04-17 18:47:58,775 INFO  L276                IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions.
[2020-04-17 18:47:58,775 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:58,775 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:58,776 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:47:58,976 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:58,976 INFO  L427      AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:47:58,977 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:47:58,977 INFO  L82        PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times
[2020-04-17 18:47:58,977 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:47:58,977 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503073834]
[2020-04-17 18:47:58,978 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:47:58,982 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:47:59,120 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:59,121 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503073834]
[2020-04-17 18:47:59,121 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775585681]
[2020-04-17 18:47:59,121 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:47:59,194 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:47:59,194 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:47:59,196 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:47:59,197 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:47:59,248 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:47:59,249 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:47:59,249 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17
[2020-04-17 18:47:59,250 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230779113]
[2020-04-17 18:47:59,250 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:47:59,250 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:47:59,250 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:47:59,251 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:47:59,251 INFO  L87              Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states.
[2020-04-17 18:47:59,976 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:47:59,976 INFO  L93              Difference]: Finished difference Result 86 states and 213 transitions.
[2020-04-17 18:47:59,977 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-04-17 18:47:59,977 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 22
[2020-04-17 18:47:59,977 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:47:59,977 INFO  L225             Difference]: With dead ends: 86
[2020-04-17 18:47:59,978 INFO  L226             Difference]: Without dead ends: 78
[2020-04-17 18:47:59,979 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=587, Invalid=1483, Unknown=0, NotChecked=0, Total=2070
[2020-04-17 18:47:59,979 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-04-17 18:47:59,980 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57.
[2020-04-17 18:47:59,981 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 57 states.
[2020-04-17 18:47:59,981 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions.
[2020-04-17 18:47:59,981 INFO  L78                 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22
[2020-04-17 18:47:59,981 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:47:59,981 INFO  L479      AbstractCegarLoop]: Abstraction has 57 states and 138 transitions.
[2020-04-17 18:47:59,982 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:47:59,982 INFO  L276                IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions.
[2020-04-17 18:47:59,982 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-04-17 18:47:59,982 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:47:59,982 INFO  L425         BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:00,185 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:00,186 INFO  L427      AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:00,186 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:00,187 INFO  L82        PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times
[2020-04-17 18:48:00,187 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:00,187 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848183629]
[2020-04-17 18:48:00,187 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:00,193 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:00,303 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:00,304 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848183629]
[2020-04-17 18:48:00,304 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376700646]
[2020-04-17 18:48:00,304 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:00,354 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s)
[2020-04-17 18:48:00,354 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:00,355 INFO  L264         TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-04-17 18:48:00,355 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:00,369 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:00,382 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:00,382 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:00,382 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17
[2020-04-17 18:48:00,382 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024597240]
[2020-04-17 18:48:00,382 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:48:00,382 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:00,382 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:48:00,383 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:48:00,383 INFO  L87              Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states.
[2020-04-17 18:48:01,036 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:01,036 INFO  L93              Difference]: Finished difference Result 100 states and 243 transitions.
[2020-04-17 18:48:01,036 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-04-17 18:48:01,036 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 22
[2020-04-17 18:48:01,037 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:01,037 INFO  L225             Difference]: With dead ends: 100
[2020-04-17 18:48:01,037 INFO  L226             Difference]: Without dead ends: 95
[2020-04-17 18:48:01,037 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256
[2020-04-17 18:48:01,038 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-04-17 18:48:01,039 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76.
[2020-04-17 18:48:01,039 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 76 states.
[2020-04-17 18:48:01,039 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions.
[2020-04-17 18:48:01,039 INFO  L78                 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22
[2020-04-17 18:48:01,039 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:01,039 INFO  L479      AbstractCegarLoop]: Abstraction has 76 states and 193 transitions.
[2020-04-17 18:48:01,039 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:48:01,040 INFO  L276                IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions.
[2020-04-17 18:48:01,040 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:01,040 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:01,040 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:01,240 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:01,241 INFO  L427      AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:01,241 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:01,241 INFO  L82        PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times
[2020-04-17 18:48:01,242 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:01,242 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170234847]
[2020-04-17 18:48:01,242 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:01,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:01,363 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:01,364 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170234847]
[2020-04-17 18:48:01,364 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078305910]
[2020-04-17 18:48:01,364 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:01,409 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:01,409 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:01,410 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:01,410 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:01,425 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:01,436 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:01,436 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:01,436 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18
[2020-04-17 18:48:01,437 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435807228]
[2020-04-17 18:48:01,437 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:01,437 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:01,437 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:01,437 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:01,437 INFO  L87              Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states.
[2020-04-17 18:48:02,140 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:02,140 INFO  L93              Difference]: Finished difference Result 84 states and 213 transitions.
[2020-04-17 18:48:02,140 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-04-17 18:48:02,140 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 23
[2020-04-17 18:48:02,141 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:02,141 INFO  L225             Difference]: With dead ends: 84
[2020-04-17 18:48:02,141 INFO  L226             Difference]: Without dead ends: 79
[2020-04-17 18:48:02,141 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352
[2020-04-17 18:48:02,142 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2020-04-17 18:48:02,143 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58.
[2020-04-17 18:48:02,143 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 58 states.
[2020-04-17 18:48:02,143 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions.
[2020-04-17 18:48:02,143 INFO  L78                 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23
[2020-04-17 18:48:02,143 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:02,143 INFO  L479      AbstractCegarLoop]: Abstraction has 58 states and 142 transitions.
[2020-04-17 18:48:02,144 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:02,144 INFO  L276                IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions.
[2020-04-17 18:48:02,144 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:02,144 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:02,144 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:02,344 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:02,345 INFO  L427      AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:02,345 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:02,345 INFO  L82        PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times
[2020-04-17 18:48:02,346 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:02,346 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655230680]
[2020-04-17 18:48:02,346 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:02,351 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:02,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:02,517 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655230680]
[2020-04-17 18:48:02,517 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903172036]
[2020-04-17 18:48:02,517 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:02,568 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s)
[2020-04-17 18:48:02,568 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:02,569 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:02,570 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:02,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:02,585 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:02,586 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2020-04-17 18:48:02,586 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309926313]
[2020-04-17 18:48:02,586 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:48:02,586 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:02,586 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:48:02,586 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:48:02,587 INFO  L87              Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states.
[2020-04-17 18:48:02,886 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:02,886 INFO  L93              Difference]: Finished difference Result 90 states and 209 transitions.
[2020-04-17 18:48:02,887 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-04-17 18:48:02,887 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 23
[2020-04-17 18:48:02,887 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:02,887 INFO  L225             Difference]: With dead ends: 90
[2020-04-17 18:48:02,888 INFO  L226             Difference]: Without dead ends: 84
[2020-04-17 18:48:02,888 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122
[2020-04-17 18:48:02,888 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 84 states.
[2020-04-17 18:48:02,889 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66.
[2020-04-17 18:48:02,889 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2020-04-17 18:48:02,890 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions.
[2020-04-17 18:48:02,890 INFO  L78                 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23
[2020-04-17 18:48:02,890 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:02,890 INFO  L479      AbstractCegarLoop]: Abstraction has 66 states and 161 transitions.
[2020-04-17 18:48:02,890 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:48:02,890 INFO  L276                IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions.
[2020-04-17 18:48:02,891 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:02,891 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:02,891 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:03,094 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:03,095 INFO  L427      AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:03,095 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:03,095 INFO  L82        PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times
[2020-04-17 18:48:03,096 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:03,096 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049409378]
[2020-04-17 18:48:03,096 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:03,104 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:03,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:03,264 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049409378]
[2020-04-17 18:48:03,265 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444919390]
[2020-04-17 18:48:03,265 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:03,315 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s)
[2020-04-17 18:48:03,316 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:03,316 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:03,317 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:03,336 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:03,344 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:03,344 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:03,344 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18
[2020-04-17 18:48:03,344 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577502849]
[2020-04-17 18:48:03,345 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:03,345 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:03,345 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:03,345 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:03,345 INFO  L87              Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states.
[2020-04-17 18:48:03,695 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:03,695 INFO  L93              Difference]: Finished difference Result 106 states and 241 transitions.
[2020-04-17 18:48:03,696 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-04-17 18:48:03,696 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 23
[2020-04-17 18:48:03,696 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:03,697 INFO  L225             Difference]: With dead ends: 106
[2020-04-17 18:48:03,697 INFO  L226             Difference]: Without dead ends: 100
[2020-04-17 18:48:03,697 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260
[2020-04-17 18:48:03,698 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2020-04-17 18:48:03,699 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64.
[2020-04-17 18:48:03,699 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 64 states.
[2020-04-17 18:48:03,699 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions.
[2020-04-17 18:48:03,699 INFO  L78                 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23
[2020-04-17 18:48:03,699 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:03,700 INFO  L479      AbstractCegarLoop]: Abstraction has 64 states and 157 transitions.
[2020-04-17 18:48:03,700 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:03,700 INFO  L276                IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions.
[2020-04-17 18:48:03,700 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:03,700 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:03,700 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:03,903 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:03,904 INFO  L427      AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:03,904 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:03,904 INFO  L82        PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times
[2020-04-17 18:48:03,904 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:03,905 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052559156]
[2020-04-17 18:48:03,905 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:03,910 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:04,072 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:04,073 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052559156]
[2020-04-17 18:48:04,073 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052648395]
[2020-04-17 18:48:04,073 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:04,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:04,119 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:04,120 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:04,127 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:04,127 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:04,127 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2020-04-17 18:48:04,127 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391462146]
[2020-04-17 18:48:04,127 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:48:04,127 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:04,128 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:48:04,128 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:48:04,128 INFO  L87              Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states.
[2020-04-17 18:48:04,495 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:04,495 INFO  L93              Difference]: Finished difference Result 107 states and 245 transitions.
[2020-04-17 18:48:04,496 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:48:04,496 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 23
[2020-04-17 18:48:04,496 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:04,496 INFO  L225             Difference]: With dead ends: 107
[2020-04-17 18:48:04,497 INFO  L226             Difference]: Without dead ends: 101
[2020-04-17 18:48:04,497 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332
[2020-04-17 18:48:04,497 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-04-17 18:48:04,499 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67.
[2020-04-17 18:48:04,499 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 67 states.
[2020-04-17 18:48:04,500 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions.
[2020-04-17 18:48:04,500 INFO  L78                 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23
[2020-04-17 18:48:04,500 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:04,500 INFO  L479      AbstractCegarLoop]: Abstraction has 67 states and 165 transitions.
[2020-04-17 18:48:04,500 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:48:04,501 INFO  L276                IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions.
[2020-04-17 18:48:04,501 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:04,501 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:04,501 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:04,704 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:04,704 INFO  L427      AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:04,704 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:04,705 INFO  L82        PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times
[2020-04-17 18:48:04,705 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:04,705 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882746157]
[2020-04-17 18:48:04,705 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:04,711 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:04,872 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:04,872 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882746157]
[2020-04-17 18:48:04,872 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135475354]
[2020-04-17 18:48:04,872 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:04,921 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:04,922 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:04,922 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:04,923 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:04,938 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:04,945 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:04,946 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:04,946 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18
[2020-04-17 18:48:04,946 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341247006]
[2020-04-17 18:48:04,946 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:04,946 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:04,947 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:04,947 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:04,947 INFO  L87              Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states.
[2020-04-17 18:48:05,382 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:05,383 INFO  L93              Difference]: Finished difference Result 119 states and 269 transitions.
[2020-04-17 18:48:05,383 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-04-17 18:48:05,383 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 23
[2020-04-17 18:48:05,384 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:05,384 INFO  L225             Difference]: With dead ends: 119
[2020-04-17 18:48:05,384 INFO  L226             Difference]: Without dead ends: 113
[2020-04-17 18:48:05,385 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482
[2020-04-17 18:48:05,385 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 113 states.
[2020-04-17 18:48:05,386 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66.
[2020-04-17 18:48:05,387 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2020-04-17 18:48:05,387 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions.
[2020-04-17 18:48:05,387 INFO  L78                 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23
[2020-04-17 18:48:05,387 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:05,387 INFO  L479      AbstractCegarLoop]: Abstraction has 66 states and 163 transitions.
[2020-04-17 18:48:05,388 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:05,388 INFO  L276                IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions.
[2020-04-17 18:48:05,388 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:05,388 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:05,388 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:05,589 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:05,589 INFO  L427      AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:05,589 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:05,590 INFO  L82        PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times
[2020-04-17 18:48:05,590 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:05,590 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440928580]
[2020-04-17 18:48:05,590 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:05,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:05,763 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:05,763 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440928580]
[2020-04-17 18:48:05,763 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509376654]
[2020-04-17 18:48:05,763 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:05,817 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2020-04-17 18:48:05,817 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:05,818 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:05,819 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:05,829 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:05,829 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:05,829 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2020-04-17 18:48:05,829 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838713261]
[2020-04-17 18:48:05,830 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:48:05,830 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:05,830 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:48:05,830 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:48:05,830 INFO  L87              Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states.
[2020-04-17 18:48:06,266 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:06,266 INFO  L93              Difference]: Finished difference Result 119 states and 271 transitions.
[2020-04-17 18:48:06,266 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-04-17 18:48:06,266 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 23
[2020-04-17 18:48:06,267 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:06,267 INFO  L225             Difference]: With dead ends: 119
[2020-04-17 18:48:06,267 INFO  L226             Difference]: Without dead ends: 113
[2020-04-17 18:48:06,268 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560
[2020-04-17 18:48:06,268 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 113 states.
[2020-04-17 18:48:06,269 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69.
[2020-04-17 18:48:06,270 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 69 states.
[2020-04-17 18:48:06,270 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions.
[2020-04-17 18:48:06,270 INFO  L78                 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23
[2020-04-17 18:48:06,271 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:06,271 INFO  L479      AbstractCegarLoop]: Abstraction has 69 states and 171 transitions.
[2020-04-17 18:48:06,271 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:48:06,271 INFO  L276                IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions.
[2020-04-17 18:48:06,271 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:06,271 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:06,271 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:06,474 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:06,475 INFO  L427      AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:06,475 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:06,475 INFO  L82        PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times
[2020-04-17 18:48:06,476 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:06,476 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464976469]
[2020-04-17 18:48:06,476 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:06,481 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:06,630 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:06,631 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464976469]
[2020-04-17 18:48:06,631 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400890639]
[2020-04-17 18:48:06,631 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:06,679 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:06,679 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:06,680 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:06,680 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:06,705 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:06,715 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:06,716 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:06,716 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18
[2020-04-17 18:48:06,716 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471325376]
[2020-04-17 18:48:06,716 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:06,716 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:06,717 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:06,717 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:06,717 INFO  L87              Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states.
[2020-04-17 18:48:07,184 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:07,185 INFO  L93              Difference]: Finished difference Result 116 states and 265 transitions.
[2020-04-17 18:48:07,185 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:48:07,185 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 23
[2020-04-17 18:48:07,185 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:07,186 INFO  L225             Difference]: With dead ends: 116
[2020-04-17 18:48:07,186 INFO  L226             Difference]: Without dead ends: 110
[2020-04-17 18:48:07,186 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640
[2020-04-17 18:48:07,187 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2020-04-17 18:48:07,188 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68.
[2020-04-17 18:48:07,188 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68 states.
[2020-04-17 18:48:07,188 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions.
[2020-04-17 18:48:07,188 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23
[2020-04-17 18:48:07,189 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:07,189 INFO  L479      AbstractCegarLoop]: Abstraction has 68 states and 169 transitions.
[2020-04-17 18:48:07,189 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:07,189 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions.
[2020-04-17 18:48:07,189 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:07,189 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:07,189 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:07,390 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:07,390 INFO  L427      AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:07,391 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:07,391 INFO  L82        PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times
[2020-04-17 18:48:07,391 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:07,391 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906022799]
[2020-04-17 18:48:07,392 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:07,396 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:07,546 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:07,547 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906022799]
[2020-04-17 18:48:07,547 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013830151]
[2020-04-17 18:48:07,547 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:07,597 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s)
[2020-04-17 18:48:07,597 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:07,598 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:07,599 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:07,610 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:07,611 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:07,611 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2020-04-17 18:48:07,611 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266680643]
[2020-04-17 18:48:07,611 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:48:07,611 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:07,611 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:48:07,611 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:48:07,611 INFO  L87              Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states.
[2020-04-17 18:48:08,072 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:08,072 INFO  L93              Difference]: Finished difference Result 117 states and 269 transitions.
[2020-04-17 18:48:08,073 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:48:08,073 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 23
[2020-04-17 18:48:08,073 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:08,073 INFO  L225             Difference]: With dead ends: 117
[2020-04-17 18:48:08,074 INFO  L226             Difference]: Without dead ends: 111
[2020-04-17 18:48:08,074 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722
[2020-04-17 18:48:08,074 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2020-04-17 18:48:08,075 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71.
[2020-04-17 18:48:08,076 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 71 states.
[2020-04-17 18:48:08,076 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions.
[2020-04-17 18:48:08,076 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23
[2020-04-17 18:48:08,076 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:08,076 INFO  L479      AbstractCegarLoop]: Abstraction has 71 states and 177 transitions.
[2020-04-17 18:48:08,076 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:48:08,076 INFO  L276                IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions.
[2020-04-17 18:48:08,076 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:08,077 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:08,077 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:08,277 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:08,278 INFO  L427      AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:08,278 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:08,278 INFO  L82        PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times
[2020-04-17 18:48:08,278 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:08,279 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158015563]
[2020-04-17 18:48:08,279 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:08,283 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:08,427 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:08,428 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158015563]
[2020-04-17 18:48:08,428 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624849424]
[2020-04-17 18:48:08,428 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:08,477 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s)
[2020-04-17 18:48:08,477 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:08,478 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:08,479 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:08,502 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:08,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:08,517 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:08,517 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18
[2020-04-17 18:48:08,517 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844483742]
[2020-04-17 18:48:08,517 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:08,517 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:08,518 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:08,518 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:08,518 INFO  L87              Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states.
[2020-04-17 18:48:09,048 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:09,048 INFO  L93              Difference]: Finished difference Result 114 states and 263 transitions.
[2020-04-17 18:48:09,049 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:48:09,049 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 23
[2020-04-17 18:48:09,049 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:09,049 INFO  L225             Difference]: With dead ends: 114
[2020-04-17 18:48:09,049 INFO  L226             Difference]: Without dead ends: 108
[2020-04-17 18:48:09,050 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806
[2020-04-17 18:48:09,050 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 108 states.
[2020-04-17 18:48:09,051 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70.
[2020-04-17 18:48:09,051 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-04-17 18:48:09,052 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions.
[2020-04-17 18:48:09,052 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23
[2020-04-17 18:48:09,052 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:09,052 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 175 transitions.
[2020-04-17 18:48:09,052 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:09,053 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions.
[2020-04-17 18:48:09,053 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:09,053 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:09,053 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:09,256 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:09,257 INFO  L427      AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:09,257 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:09,257 INFO  L82        PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times
[2020-04-17 18:48:09,258 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:09,258 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377828989]
[2020-04-17 18:48:09,258 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:09,263 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:09,394 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:09,395 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377828989]
[2020-04-17 18:48:09,395 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232449278]
[2020-04-17 18:48:09,395 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:09,440 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:09,441 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:09,441 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:09,450 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:09,450 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:09,450 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2020-04-17 18:48:09,451 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625234418]
[2020-04-17 18:48:09,451 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:48:09,451 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:09,451 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:48:09,451 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:48:09,451 INFO  L87              Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states.
[2020-04-17 18:48:09,936 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:09,937 INFO  L93              Difference]: Finished difference Result 115 states and 267 transitions.
[2020-04-17 18:48:09,937 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-04-17 18:48:09,937 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 23
[2020-04-17 18:48:09,937 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:09,938 INFO  L225             Difference]: With dead ends: 115
[2020-04-17 18:48:09,938 INFO  L226             Difference]: Without dead ends: 109
[2020-04-17 18:48:09,938 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892
[2020-04-17 18:48:09,939 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2020-04-17 18:48:09,940 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73.
[2020-04-17 18:48:09,940 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 73 states.
[2020-04-17 18:48:09,940 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions.
[2020-04-17 18:48:09,940 INFO  L78                 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23
[2020-04-17 18:48:09,941 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:09,941 INFO  L479      AbstractCegarLoop]: Abstraction has 73 states and 183 transitions.
[2020-04-17 18:48:09,941 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:48:09,941 INFO  L276                IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions.
[2020-04-17 18:48:09,941 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:09,941 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:09,941 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:10,142 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:10,142 INFO  L427      AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:10,142 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:10,143 INFO  L82        PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times
[2020-04-17 18:48:10,143 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:10,143 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339442312]
[2020-04-17 18:48:10,143 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:10,148 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:10,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:10,281 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339442312]
[2020-04-17 18:48:10,281 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189310228]
[2020-04-17 18:48:10,282 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:10,327 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:10,328 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:10,329 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:10,329 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:10,344 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:10,352 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:10,352 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:10,352 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18
[2020-04-17 18:48:10,352 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385833397]
[2020-04-17 18:48:10,352 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:10,353 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:10,353 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:10,353 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:10,353 INFO  L87              Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states.
[2020-04-17 18:48:10,946 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:10,946 INFO  L93              Difference]: Finished difference Result 112 states and 261 transitions.
[2020-04-17 18:48:10,946 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-04-17 18:48:10,946 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 23
[2020-04-17 18:48:10,947 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:10,947 INFO  L225             Difference]: With dead ends: 112
[2020-04-17 18:48:10,947 INFO  L226             Difference]: Without dead ends: 106
[2020-04-17 18:48:10,948 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980
[2020-04-17 18:48:10,948 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 106 states.
[2020-04-17 18:48:10,949 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72.
[2020-04-17 18:48:10,949 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 72 states.
[2020-04-17 18:48:10,949 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions.
[2020-04-17 18:48:10,949 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23
[2020-04-17 18:48:10,949 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:10,949 INFO  L479      AbstractCegarLoop]: Abstraction has 72 states and 181 transitions.
[2020-04-17 18:48:10,949 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:10,950 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions.
[2020-04-17 18:48:10,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:10,950 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:10,950 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:11,150 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:11,151 INFO  L427      AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:11,151 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:11,151 INFO  L82        PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times
[2020-04-17 18:48:11,152 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:11,152 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191718521]
[2020-04-17 18:48:11,152 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:11,157 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:11,281 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:11,282 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191718521]
[2020-04-17 18:48:11,282 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041599373]
[2020-04-17 18:48:11,282 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:11,329 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2020-04-17 18:48:11,329 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:11,330 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:11,331 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:11,375 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:11,375 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:11,376 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2020-04-17 18:48:11,376 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712333435]
[2020-04-17 18:48:11,376 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:48:11,376 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:11,377 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:48:11,377 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:48:11,377 INFO  L87              Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states.
[2020-04-17 18:48:11,892 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:11,892 INFO  L93              Difference]: Finished difference Result 113 states and 265 transitions.
[2020-04-17 18:48:11,893 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-04-17 18:48:11,893 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 23
[2020-04-17 18:48:11,893 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:11,893 INFO  L225             Difference]: With dead ends: 113
[2020-04-17 18:48:11,894 INFO  L226             Difference]: Without dead ends: 107
[2020-04-17 18:48:11,894 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070
[2020-04-17 18:48:11,894 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 107 states.
[2020-04-17 18:48:11,895 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75.
[2020-04-17 18:48:11,896 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-04-17 18:48:11,896 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions.
[2020-04-17 18:48:11,896 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23
[2020-04-17 18:48:11,896 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:11,896 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 189 transitions.
[2020-04-17 18:48:11,896 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:48:11,897 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions.
[2020-04-17 18:48:11,897 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:11,897 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:11,897 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:12,097 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:12,098 INFO  L427      AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:12,098 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:12,098 INFO  L82        PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times
[2020-04-17 18:48:12,099 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:12,099 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379245846]
[2020-04-17 18:48:12,099 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:12,105 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:12,240 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:12,241 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379245846]
[2020-04-17 18:48:12,241 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564200859]
[2020-04-17 18:48:12,241 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:12,290 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:12,290 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:12,291 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:12,291 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:12,305 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:12,315 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:12,315 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:12,315 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18
[2020-04-17 18:48:12,315 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702332753]
[2020-04-17 18:48:12,315 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:12,316 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:12,316 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:12,316 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:12,316 INFO  L87              Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states.
[2020-04-17 18:48:12,963 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:12,964 INFO  L93              Difference]: Finished difference Result 110 states and 259 transitions.
[2020-04-17 18:48:12,964 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-04-17 18:48:12,964 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 23
[2020-04-17 18:48:12,964 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:12,965 INFO  L225             Difference]: With dead ends: 110
[2020-04-17 18:48:12,965 INFO  L226             Difference]: Without dead ends: 104
[2020-04-17 18:48:12,965 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162
[2020-04-17 18:48:12,966 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 104 states.
[2020-04-17 18:48:12,967 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74.
[2020-04-17 18:48:12,967 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:48:12,967 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions.
[2020-04-17 18:48:12,967 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23
[2020-04-17 18:48:12,968 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:12,968 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 187 transitions.
[2020-04-17 18:48:12,968 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:12,968 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions.
[2020-04-17 18:48:12,968 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:12,968 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:12,968 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:13,169 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:13,169 INFO  L427      AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:13,169 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:13,170 INFO  L82        PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times
[2020-04-17 18:48:13,170 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:13,170 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140332574]
[2020-04-17 18:48:13,170 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:13,175 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:13,296 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:13,296 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140332574]
[2020-04-17 18:48:13,297 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448033200]
[2020-04-17 18:48:13,297 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:13,351 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s)
[2020-04-17 18:48:13,351 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:13,352 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:13,352 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:13,384 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:13,384 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:13,385 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2020-04-17 18:48:13,385 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665568988]
[2020-04-17 18:48:13,385 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:48:13,385 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:13,385 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:48:13,385 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:48:13,386 INFO  L87              Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states.
[2020-04-17 18:48:14,042 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:14,043 INFO  L93              Difference]: Finished difference Result 111 states and 263 transitions.
[2020-04-17 18:48:14,043 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. 
[2020-04-17 18:48:14,043 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 23
[2020-04-17 18:48:14,043 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:14,044 INFO  L225             Difference]: With dead ends: 111
[2020-04-17 18:48:14,044 INFO  L226             Difference]: Without dead ends: 105
[2020-04-17 18:48:14,044 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256
[2020-04-17 18:48:14,045 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 105 states.
[2020-04-17 18:48:14,046 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77.
[2020-04-17 18:48:14,046 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 77 states.
[2020-04-17 18:48:14,046 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions.
[2020-04-17 18:48:14,047 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23
[2020-04-17 18:48:14,047 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:14,047 INFO  L479      AbstractCegarLoop]: Abstraction has 77 states and 195 transitions.
[2020-04-17 18:48:14,047 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:48:14,047 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions.
[2020-04-17 18:48:14,047 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:14,047 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:14,048 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:14,248 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:14,248 INFO  L427      AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:14,248 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:14,249 INFO  L82        PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times
[2020-04-17 18:48:14,249 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:14,249 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752788001]
[2020-04-17 18:48:14,249 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:14,254 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:14,370 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:14,371 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752788001]
[2020-04-17 18:48:14,371 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937668818]
[2020-04-17 18:48:14,371 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:14,420 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s)
[2020-04-17 18:48:14,421 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:14,422 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:14,422 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:14,437 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:14,447 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:14,447 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:14,447 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18
[2020-04-17 18:48:14,447 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153006133]
[2020-04-17 18:48:14,447 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:14,447 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:14,448 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:14,448 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:14,448 INFO  L87              Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states.
[2020-04-17 18:48:15,156 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:15,156 INFO  L93              Difference]: Finished difference Result 108 states and 257 transitions.
[2020-04-17 18:48:15,156 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. 
[2020-04-17 18:48:15,156 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 23
[2020-04-17 18:48:15,157 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:15,157 INFO  L225             Difference]: With dead ends: 108
[2020-04-17 18:48:15,157 INFO  L226             Difference]: Without dead ends: 102
[2020-04-17 18:48:15,158 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352
[2020-04-17 18:48:15,158 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 102 states.
[2020-04-17 18:48:15,159 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76.
[2020-04-17 18:48:15,159 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 76 states.
[2020-04-17 18:48:15,159 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions.
[2020-04-17 18:48:15,160 INFO  L78                 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23
[2020-04-17 18:48:15,160 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:15,160 INFO  L479      AbstractCegarLoop]: Abstraction has 76 states and 193 transitions.
[2020-04-17 18:48:15,160 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:15,160 INFO  L276                IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions.
[2020-04-17 18:48:15,160 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:15,160 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:15,161 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:15,361 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:15,361 INFO  L427      AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:15,362 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:15,362 INFO  L82        PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times
[2020-04-17 18:48:15,362 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:15,362 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134548482]
[2020-04-17 18:48:15,363 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:15,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:15,520 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:15,520 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134548482]
[2020-04-17 18:48:15,521 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737496619]
[2020-04-17 18:48:15,521 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:15,566 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:15,566 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-04-17 18:48:15,567 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:15,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:15,587 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:15,587 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17
[2020-04-17 18:48:15,588 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931508719]
[2020-04-17 18:48:15,588 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 19 states
[2020-04-17 18:48:15,588 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:15,588 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2020-04-17 18:48:15,588 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342
[2020-04-17 18:48:15,588 INFO  L87              Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states.
[2020-04-17 18:48:16,169 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:16,169 INFO  L93              Difference]: Finished difference Result 128 states and 307 transitions.
[2020-04-17 18:48:16,169 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. 
[2020-04-17 18:48:16,170 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states. Word has length 23
[2020-04-17 18:48:16,170 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:16,170 INFO  L225             Difference]: With dead ends: 128
[2020-04-17 18:48:16,170 INFO  L226             Difference]: Without dead ends: 122
[2020-04-17 18:48:16,171 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450
[2020-04-17 18:48:16,171 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 122 states.
[2020-04-17 18:48:16,173 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82.
[2020-04-17 18:48:16,173 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 82 states.
[2020-04-17 18:48:16,173 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions.
[2020-04-17 18:48:16,174 INFO  L78                 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23
[2020-04-17 18:48:16,174 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:16,174 INFO  L479      AbstractCegarLoop]: Abstraction has 82 states and 213 transitions.
[2020-04-17 18:48:16,174 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 19 states.
[2020-04-17 18:48:16,174 INFO  L276                IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions.
[2020-04-17 18:48:16,174 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-04-17 18:48:16,175 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:16,175 INFO  L425         BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:16,378 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:16,378 INFO  L427      AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:16,378 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:16,378 INFO  L82        PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times
[2020-04-17 18:48:16,378 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:16,378 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233036005]
[2020-04-17 18:48:16,379 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:16,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:16,503 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:16,504 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233036005]
[2020-04-17 18:48:16,504 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674648977]
[2020-04-17 18:48:16,504 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:16,546 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:16,547 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:16,548 INFO  L264         TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:16,548 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:16,587 INFO  L134       CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:16,587 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:16,588 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18
[2020-04-17 18:48:16,588 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832058637]
[2020-04-17 18:48:16,588 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:16,588 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:16,588 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:16,588 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:16,588 INFO  L87              Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states.
[2020-04-17 18:48:17,304 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:17,304 INFO  L93              Difference]: Finished difference Result 109 states and 263 transitions.
[2020-04-17 18:48:17,304 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. 
[2020-04-17 18:48:17,305 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 23
[2020-04-17 18:48:17,305 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:17,305 INFO  L225             Difference]: With dead ends: 109
[2020-04-17 18:48:17,305 INFO  L226             Difference]: Without dead ends: 101
[2020-04-17 18:48:17,306 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550
[2020-04-17 18:48:17,306 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-04-17 18:48:17,307 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79.
[2020-04-17 18:48:17,307 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 79 states.
[2020-04-17 18:48:17,307 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions.
[2020-04-17 18:48:17,307 INFO  L78                 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23
[2020-04-17 18:48:17,307 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:17,308 INFO  L479      AbstractCegarLoop]: Abstraction has 79 states and 201 transitions.
[2020-04-17 18:48:17,308 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:17,308 INFO  L276                IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions.
[2020-04-17 18:48:17,308 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:17,308 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:17,308 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:17,508 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:17,509 INFO  L427      AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:17,509 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:17,509 INFO  L82        PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times
[2020-04-17 18:48:17,509 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:17,510 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724115436]
[2020-04-17 18:48:17,510 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:17,515 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:17,688 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:17,689 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724115436]
[2020-04-17 18:48:17,689 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337495371]
[2020-04-17 18:48:17,689 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:17,743 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2020-04-17 18:48:17,744 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:17,744 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:17,745 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:17,752 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:17,752 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:17,752 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2020-04-17 18:48:17,752 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963754359]
[2020-04-17 18:48:17,752 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:17,752 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:17,753 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:17,753 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:17,753 INFO  L87              Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states.
[2020-04-17 18:48:18,080 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:18,081 INFO  L93              Difference]: Finished difference Result 124 states and 291 transitions.
[2020-04-17 18:48:18,081 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-04-17 18:48:18,081 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 24
[2020-04-17 18:48:18,081 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:18,082 INFO  L225             Difference]: With dead ends: 124
[2020-04-17 18:48:18,082 INFO  L226             Difference]: Without dead ends: 118
[2020-04-17 18:48:18,082 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332
[2020-04-17 18:48:18,082 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 118 states.
[2020-04-17 18:48:18,084 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81.
[2020-04-17 18:48:18,084 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-04-17 18:48:18,084 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions.
[2020-04-17 18:48:18,084 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24
[2020-04-17 18:48:18,084 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:18,085 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 205 transitions.
[2020-04-17 18:48:18,085 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:18,085 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions.
[2020-04-17 18:48:18,085 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:18,085 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:18,085 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:18,286 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:18,286 INFO  L427      AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:18,286 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:18,287 INFO  L82        PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times
[2020-04-17 18:48:18,287 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:18,288 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30775239]
[2020-04-17 18:48:18,288 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:18,294 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:18,486 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:18,487 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30775239]
[2020-04-17 18:48:18,487 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703558302]
[2020-04-17 18:48:18,487 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:18,535 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:18,535 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:18,536 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:18,536 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:18,552 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:18,560 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:18,560 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:18,560 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19
[2020-04-17 18:48:18,560 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499228821]
[2020-04-17 18:48:18,560 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:18,560 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:18,560 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:18,561 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:18,561 INFO  L87              Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states.
[2020-04-17 18:48:18,924 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:18,925 INFO  L93              Difference]: Finished difference Result 121 states and 285 transitions.
[2020-04-17 18:48:18,925 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-04-17 18:48:18,926 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 24
[2020-04-17 18:48:18,926 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:18,926 INFO  L225             Difference]: With dead ends: 121
[2020-04-17 18:48:18,926 INFO  L226             Difference]: Without dead ends: 115
[2020-04-17 18:48:18,927 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560
[2020-04-17 18:48:18,927 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 115 states.
[2020-04-17 18:48:18,928 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80.
[2020-04-17 18:48:18,928 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-04-17 18:48:18,928 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions.
[2020-04-17 18:48:18,928 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24
[2020-04-17 18:48:18,929 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:18,929 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 203 transitions.
[2020-04-17 18:48:18,929 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:18,929 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions.
[2020-04-17 18:48:18,929 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:18,929 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:18,929 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:19,129 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:19,130 INFO  L427      AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:19,130 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:19,131 INFO  L82        PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times
[2020-04-17 18:48:19,131 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:19,131 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43244533]
[2020-04-17 18:48:19,131 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:19,136 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:19,298 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:19,298 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43244533]
[2020-04-17 18:48:19,298 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730857839]
[2020-04-17 18:48:19,298 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:19,350 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s)
[2020-04-17 18:48:19,350 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:19,351 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:19,352 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:19,359 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:19,359 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:19,359 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2020-04-17 18:48:19,359 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134166006]
[2020-04-17 18:48:19,359 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:19,359 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:19,360 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:19,360 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:19,360 INFO  L87              Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states.
[2020-04-17 18:48:19,743 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:19,743 INFO  L93              Difference]: Finished difference Result 118 states and 279 transitions.
[2020-04-17 18:48:19,743 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:48:19,743 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 24
[2020-04-17 18:48:19,744 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:19,744 INFO  L225             Difference]: With dead ends: 118
[2020-04-17 18:48:19,744 INFO  L226             Difference]: Without dead ends: 112
[2020-04-17 18:48:19,744 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482
[2020-04-17 18:48:19,745 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2020-04-17 18:48:19,746 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81.
[2020-04-17 18:48:19,746 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-04-17 18:48:19,746 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions.
[2020-04-17 18:48:19,746 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24
[2020-04-17 18:48:19,747 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:19,747 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 205 transitions.
[2020-04-17 18:48:19,747 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:19,747 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions.
[2020-04-17 18:48:19,747 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:19,747 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:19,747 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:19,947 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:19,948 INFO  L427      AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:19,948 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:19,948 INFO  L82        PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times
[2020-04-17 18:48:19,949 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:19,949 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258262378]
[2020-04-17 18:48:19,949 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:19,954 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:20,149 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:20,149 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258262378]
[2020-04-17 18:48:20,150 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877708222]
[2020-04-17 18:48:20,150 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:20,205 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s)
[2020-04-17 18:48:20,205 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:20,206 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:20,207 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:20,222 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:20,229 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:20,230 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:20,230 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19
[2020-04-17 18:48:20,230 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270898459]
[2020-04-17 18:48:20,231 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:20,231 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:20,231 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:20,231 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:20,231 INFO  L87              Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states.
[2020-04-17 18:48:20,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:20,727 INFO  L93              Difference]: Finished difference Result 117 states and 277 transitions.
[2020-04-17 18:48:20,728 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:48:20,728 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 24
[2020-04-17 18:48:20,728 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:20,728 INFO  L225             Difference]: With dead ends: 117
[2020-04-17 18:48:20,729 INFO  L226             Difference]: Without dead ends: 111
[2020-04-17 18:48:20,729 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722
[2020-04-17 18:48:20,729 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2020-04-17 18:48:20,730 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80.
[2020-04-17 18:48:20,731 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-04-17 18:48:20,731 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions.
[2020-04-17 18:48:20,731 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24
[2020-04-17 18:48:20,731 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:20,731 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 203 transitions.
[2020-04-17 18:48:20,731 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:20,731 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions.
[2020-04-17 18:48:20,731 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:20,732 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:20,732 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:20,932 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:20,932 INFO  L427      AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:20,933 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:20,933 INFO  L82        PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times
[2020-04-17 18:48:20,933 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:20,934 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160702199]
[2020-04-17 18:48:20,934 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:20,939 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:21,104 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:21,105 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160702199]
[2020-04-17 18:48:21,105 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823649702]
[2020-04-17 18:48:21,105 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:21,151 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:21,153 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:21,153 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:21,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:21,161 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:21,162 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2020-04-17 18:48:21,162 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488086721]
[2020-04-17 18:48:21,162 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:21,162 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:21,162 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:21,163 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:21,163 INFO  L87              Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states.
[2020-04-17 18:48:21,591 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:21,592 INFO  L93              Difference]: Finished difference Result 114 states and 271 transitions.
[2020-04-17 18:48:21,592 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-04-17 18:48:21,592 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 24
[2020-04-17 18:48:21,592 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:21,593 INFO  L225             Difference]: With dead ends: 114
[2020-04-17 18:48:21,593 INFO  L226             Difference]: Without dead ends: 108
[2020-04-17 18:48:21,593 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640
[2020-04-17 18:48:21,594 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 108 states.
[2020-04-17 18:48:21,595 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81.
[2020-04-17 18:48:21,595 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-04-17 18:48:21,595 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions.
[2020-04-17 18:48:21,595 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24
[2020-04-17 18:48:21,595 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:21,596 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 205 transitions.
[2020-04-17 18:48:21,596 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:21,596 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions.
[2020-04-17 18:48:21,596 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:21,596 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:21,597 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:21,799 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:21,800 INFO  L427      AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:21,800 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:21,800 INFO  L82        PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times
[2020-04-17 18:48:21,801 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:21,801 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082932000]
[2020-04-17 18:48:21,801 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:21,806 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:21,961 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:21,962 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082932000]
[2020-04-17 18:48:21,962 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689451211]
[2020-04-17 18:48:21,962 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:22,011 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:22,011 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:22,012 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:22,013 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:22,027 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:22,036 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:22,036 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:22,036 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19
[2020-04-17 18:48:22,036 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557769187]
[2020-04-17 18:48:22,037 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:22,037 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:22,037 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:22,037 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:22,037 INFO  L87              Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states.
[2020-04-17 18:48:22,555 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:22,555 INFO  L93              Difference]: Finished difference Result 113 states and 269 transitions.
[2020-04-17 18:48:22,556 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:48:22,556 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 24
[2020-04-17 18:48:22,556 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:22,557 INFO  L225             Difference]: With dead ends: 113
[2020-04-17 18:48:22,557 INFO  L226             Difference]: Without dead ends: 107
[2020-04-17 18:48:22,557 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892
[2020-04-17 18:48:22,557 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 107 states.
[2020-04-17 18:48:22,558 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80.
[2020-04-17 18:48:22,559 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-04-17 18:48:22,559 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions.
[2020-04-17 18:48:22,559 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24
[2020-04-17 18:48:22,559 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:22,559 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 203 transitions.
[2020-04-17 18:48:22,560 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:22,560 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions.
[2020-04-17 18:48:22,560 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:22,560 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:22,561 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:22,763 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:22,764 INFO  L427      AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:22,764 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:22,764 INFO  L82        PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times
[2020-04-17 18:48:22,765 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:22,765 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882885513]
[2020-04-17 18:48:22,765 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:22,770 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:22,930 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:22,931 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882885513]
[2020-04-17 18:48:22,931 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899638980]
[2020-04-17 18:48:22,931 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:22,983 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2020-04-17 18:48:22,983 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:22,984 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:22,985 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:23,009 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:23,010 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:23,010 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2020-04-17 18:48:23,010 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611816769]
[2020-04-17 18:48:23,010 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:23,010 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:23,011 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:23,011 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:23,011 INFO  L87              Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states.
[2020-04-17 18:48:23,483 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:23,483 INFO  L93              Difference]: Finished difference Result 110 states and 263 transitions.
[2020-04-17 18:48:23,483 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:48:23,484 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 24
[2020-04-17 18:48:23,484 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:23,484 INFO  L225             Difference]: With dead ends: 110
[2020-04-17 18:48:23,484 INFO  L226             Difference]: Without dead ends: 104
[2020-04-17 18:48:23,485 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806
[2020-04-17 18:48:23,485 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 104 states.
[2020-04-17 18:48:23,487 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81.
[2020-04-17 18:48:23,487 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-04-17 18:48:23,487 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions.
[2020-04-17 18:48:23,487 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24
[2020-04-17 18:48:23,487 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:23,487 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 205 transitions.
[2020-04-17 18:48:23,488 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:23,488 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions.
[2020-04-17 18:48:23,488 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:23,488 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:23,488 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:23,691 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:23,691 INFO  L427      AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:23,692 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:23,692 INFO  L82        PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times
[2020-04-17 18:48:23,692 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:23,692 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778847069]
[2020-04-17 18:48:23,693 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:23,697 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:23,863 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:23,863 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778847069]
[2020-04-17 18:48:23,863 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983266193]
[2020-04-17 18:48:23,863 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:23,912 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:23,913 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:23,913 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:23,914 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:23,929 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:23,937 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:23,937 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:23,937 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19
[2020-04-17 18:48:23,937 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332809081]
[2020-04-17 18:48:23,938 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:23,938 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:23,938 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:23,938 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:23,938 INFO  L87              Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states.
[2020-04-17 18:48:24,539 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:24,539 INFO  L93              Difference]: Finished difference Result 109 states and 261 transitions.
[2020-04-17 18:48:24,539 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-04-17 18:48:24,540 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 24
[2020-04-17 18:48:24,540 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:24,540 INFO  L225             Difference]: With dead ends: 109
[2020-04-17 18:48:24,540 INFO  L226             Difference]: Without dead ends: 103
[2020-04-17 18:48:24,541 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070
[2020-04-17 18:48:24,541 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 103 states.
[2020-04-17 18:48:24,542 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80.
[2020-04-17 18:48:24,542 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-04-17 18:48:24,543 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions.
[2020-04-17 18:48:24,543 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24
[2020-04-17 18:48:24,543 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:24,543 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 203 transitions.
[2020-04-17 18:48:24,543 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:24,543 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions.
[2020-04-17 18:48:24,543 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:24,544 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:24,544 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:24,744 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:24,744 INFO  L427      AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:24,745 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:24,745 INFO  L82        PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times
[2020-04-17 18:48:24,745 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:24,745 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417278829]
[2020-04-17 18:48:24,746 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:24,751 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:24,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:24,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417278829]
[2020-04-17 18:48:24,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369088141]
[2020-04-17 18:48:24,902 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:24,955 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s)
[2020-04-17 18:48:24,956 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:24,957 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:24,958 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:24,982 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:24,982 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:24,983 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2020-04-17 18:48:24,983 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483124645]
[2020-04-17 18:48:24,983 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:24,983 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:24,983 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:24,983 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:24,983 INFO  L87              Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states.
[2020-04-17 18:48:25,493 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:25,493 INFO  L93              Difference]: Finished difference Result 106 states and 255 transitions.
[2020-04-17 18:48:25,493 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-04-17 18:48:25,493 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 24
[2020-04-17 18:48:25,494 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:25,494 INFO  L225             Difference]: With dead ends: 106
[2020-04-17 18:48:25,494 INFO  L226             Difference]: Without dead ends: 100
[2020-04-17 18:48:25,495 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980
[2020-04-17 18:48:25,495 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2020-04-17 18:48:25,496 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81.
[2020-04-17 18:48:25,496 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-04-17 18:48:25,496 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions.
[2020-04-17 18:48:25,497 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24
[2020-04-17 18:48:25,497 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:25,497 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 205 transitions.
[2020-04-17 18:48:25,497 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:25,497 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions.
[2020-04-17 18:48:25,497 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:25,497 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:25,497 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:25,698 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:25,698 INFO  L427      AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:25,698 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:25,699 INFO  L82        PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times
[2020-04-17 18:48:25,699 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:25,699 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733122764]
[2020-04-17 18:48:25,699 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:25,705 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:25,848 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:25,849 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733122764]
[2020-04-17 18:48:25,849 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578450083]
[2020-04-17 18:48:25,849 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:25,902 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s)
[2020-04-17 18:48:25,902 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:25,903 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:25,904 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:25,920 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:25,932 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:25,932 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:25,932 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19
[2020-04-17 18:48:25,932 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888358130]
[2020-04-17 18:48:25,932 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:25,933 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:25,933 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:25,933 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:25,933 INFO  L87              Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states.
[2020-04-17 18:48:26,605 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:26,605 INFO  L93              Difference]: Finished difference Result 105 states and 253 transitions.
[2020-04-17 18:48:26,605 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-04-17 18:48:26,605 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 24
[2020-04-17 18:48:26,606 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:26,606 INFO  L225             Difference]: With dead ends: 105
[2020-04-17 18:48:26,606 INFO  L226             Difference]: Without dead ends: 99
[2020-04-17 18:48:26,606 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256
[2020-04-17 18:48:26,607 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 99 states.
[2020-04-17 18:48:26,608 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80.
[2020-04-17 18:48:26,608 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-04-17 18:48:26,608 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions.
[2020-04-17 18:48:26,609 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24
[2020-04-17 18:48:26,609 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:26,609 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 203 transitions.
[2020-04-17 18:48:26,609 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:26,609 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions.
[2020-04-17 18:48:26,609 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:26,609 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:26,610 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:26,810 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:26,810 INFO  L427      AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:26,811 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:26,811 INFO  L82        PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times
[2020-04-17 18:48:26,811 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:26,811 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522230344]
[2020-04-17 18:48:26,812 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:26,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:26,953 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:26,954 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522230344]
[2020-04-17 18:48:26,954 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746451604]
[2020-04-17 18:48:26,954 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:26,998 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:26,999 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:27,000 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:27,027 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:27,027 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:27,027 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2020-04-17 18:48:27,028 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438573760]
[2020-04-17 18:48:27,028 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:27,028 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:27,028 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:27,028 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:27,028 INFO  L87              Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states.
[2020-04-17 18:48:27,582 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:27,583 INFO  L93              Difference]: Finished difference Result 102 states and 247 transitions.
[2020-04-17 18:48:27,583 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-04-17 18:48:27,583 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 24
[2020-04-17 18:48:27,583 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:27,584 INFO  L225             Difference]: With dead ends: 102
[2020-04-17 18:48:27,584 INFO  L226             Difference]: Without dead ends: 96
[2020-04-17 18:48:27,584 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162
[2020-04-17 18:48:27,584 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-04-17 18:48:27,585 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81.
[2020-04-17 18:48:27,586 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-04-17 18:48:27,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions.
[2020-04-17 18:48:27,586 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24
[2020-04-17 18:48:27,586 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:27,586 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 205 transitions.
[2020-04-17 18:48:27,586 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:27,587 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions.
[2020-04-17 18:48:27,587 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:27,587 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:27,587 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:27,787 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:27,788 INFO  L427      AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:27,788 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:27,788 INFO  L82        PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times
[2020-04-17 18:48:27,789 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:27,789 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544913105]
[2020-04-17 18:48:27,789 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:27,795 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:27,932 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:27,933 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544913105]
[2020-04-17 18:48:27,933 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525485481]
[2020-04-17 18:48:27,933 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:27,980 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:27,981 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:27,982 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:27,983 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:27,998 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:28,013 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:28,013 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:28,014 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19
[2020-04-17 18:48:28,014 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65853826]
[2020-04-17 18:48:28,014 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:28,014 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:28,014 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:28,014 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:28,014 INFO  L87              Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states.
[2020-04-17 18:48:28,749 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:28,749 INFO  L93              Difference]: Finished difference Result 101 states and 245 transitions.
[2020-04-17 18:48:28,750 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. 
[2020-04-17 18:48:28,750 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 24
[2020-04-17 18:48:28,750 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:28,750 INFO  L225             Difference]: With dead ends: 101
[2020-04-17 18:48:28,750 INFO  L226             Difference]: Without dead ends: 95
[2020-04-17 18:48:28,751 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450
[2020-04-17 18:48:28,751 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-04-17 18:48:28,752 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80.
[2020-04-17 18:48:28,752 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-04-17 18:48:28,752 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions.
[2020-04-17 18:48:28,753 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24
[2020-04-17 18:48:28,753 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:28,753 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 203 transitions.
[2020-04-17 18:48:28,753 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:28,753 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions.
[2020-04-17 18:48:28,753 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:28,753 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:28,753 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:28,956 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:28,956 INFO  L427      AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:28,956 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:28,957 INFO  L82        PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times
[2020-04-17 18:48:28,957 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:28,957 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865754229]
[2020-04-17 18:48:28,957 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:28,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:29,096 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:29,096 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865754229]
[2020-04-17 18:48:29,096 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143343253]
[2020-04-17 18:48:29,096 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:29,147 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s)
[2020-04-17 18:48:29,148 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:29,149 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:29,149 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:29,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:29,161 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:29,162 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2020-04-17 18:48:29,162 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956440735]
[2020-04-17 18:48:29,162 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:29,162 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:29,162 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:29,162 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:29,162 INFO  L87              Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states.
[2020-04-17 18:48:29,774 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:29,774 INFO  L93              Difference]: Finished difference Result 98 states and 239 transitions.
[2020-04-17 18:48:29,775 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. 
[2020-04-17 18:48:29,775 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 24
[2020-04-17 18:48:29,775 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:29,775 INFO  L225             Difference]: With dead ends: 98
[2020-04-17 18:48:29,775 INFO  L226             Difference]: Without dead ends: 92
[2020-04-17 18:48:29,776 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352
[2020-04-17 18:48:29,776 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2020-04-17 18:48:29,777 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81.
[2020-04-17 18:48:29,777 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-04-17 18:48:29,778 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions.
[2020-04-17 18:48:29,778 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24
[2020-04-17 18:48:29,778 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:29,778 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 205 transitions.
[2020-04-17 18:48:29,778 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:29,778 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions.
[2020-04-17 18:48:29,778 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:29,778 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:29,779 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:29,979 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:29,979 INFO  L427      AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:29,980 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:29,980 INFO  L82        PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times
[2020-04-17 18:48:29,980 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:29,980 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114406825]
[2020-04-17 18:48:29,981 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:29,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:30,113 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:30,113 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114406825]
[2020-04-17 18:48:30,113 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156528536]
[2020-04-17 18:48:30,114 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:30,161 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:30,161 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:30,162 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:30,162 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:30,176 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:30,187 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:30,187 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:30,187 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19
[2020-04-17 18:48:30,187 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862690289]
[2020-04-17 18:48:30,187 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:30,187 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:30,188 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:30,188 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:30,188 INFO  L87              Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states.
[2020-04-17 18:48:30,992 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:30,992 INFO  L93              Difference]: Finished difference Result 97 states and 237 transitions.
[2020-04-17 18:48:30,992 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. 
[2020-04-17 18:48:30,993 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 24
[2020-04-17 18:48:30,993 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:30,993 INFO  L225             Difference]: With dead ends: 97
[2020-04-17 18:48:30,993 INFO  L226             Difference]: Without dead ends: 91
[2020-04-17 18:48:30,994 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652
[2020-04-17 18:48:30,994 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2020-04-17 18:48:30,995 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80.
[2020-04-17 18:48:30,995 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-04-17 18:48:30,996 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions.
[2020-04-17 18:48:30,996 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24
[2020-04-17 18:48:30,996 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:30,996 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 203 transitions.
[2020-04-17 18:48:30,996 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:30,996 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions.
[2020-04-17 18:48:30,996 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:30,997 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:30,997 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:31,197 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:31,197 INFO  L427      AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:31,198 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:31,198 INFO  L82        PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times
[2020-04-17 18:48:31,198 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:31,199 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028356769]
[2020-04-17 18:48:31,199 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:31,203 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:31,330 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:31,330 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028356769]
[2020-04-17 18:48:31,330 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127091628]
[2020-04-17 18:48:31,331 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:31,381 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s)
[2020-04-17 18:48:31,381 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:31,382 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:31,383 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:31,395 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:31,395 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:31,395 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18
[2020-04-17 18:48:31,396 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262231914]
[2020-04-17 18:48:31,396 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-04-17 18:48:31,396 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:31,396 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-04-17 18:48:31,396 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380
[2020-04-17 18:48:31,396 INFO  L87              Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states.
[2020-04-17 18:48:32,030 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:32,030 INFO  L93              Difference]: Finished difference Result 113 states and 277 transitions.
[2020-04-17 18:48:32,030 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. 
[2020-04-17 18:48:32,030 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 24
[2020-04-17 18:48:32,031 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:32,031 INFO  L225             Difference]: With dead ends: 113
[2020-04-17 18:48:32,031 INFO  L226             Difference]: Without dead ends: 107
[2020-04-17 18:48:32,032 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550
[2020-04-17 18:48:32,032 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 107 states.
[2020-04-17 18:48:32,033 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84.
[2020-04-17 18:48:32,033 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 84 states.
[2020-04-17 18:48:32,034 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions.
[2020-04-17 18:48:32,034 INFO  L78                 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24
[2020-04-17 18:48:32,034 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:32,034 INFO  L479      AbstractCegarLoop]: Abstraction has 84 states and 217 transitions.
[2020-04-17 18:48:32,034 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-04-17 18:48:32,034 INFO  L276                IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions.
[2020-04-17 18:48:32,035 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:32,035 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:32,035 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:32,235 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:32,236 INFO  L427      AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:32,236 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:32,236 INFO  L82        PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times
[2020-04-17 18:48:32,237 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:32,237 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10524187]
[2020-04-17 18:48:32,237 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:32,242 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:32,398 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:32,399 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10524187]
[2020-04-17 18:48:32,399 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488760245]
[2020-04-17 18:48:32,399 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:32,455 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s)
[2020-04-17 18:48:32,456 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:32,456 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:32,457 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:32,472 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:32,484 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:32,484 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:32,484 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19
[2020-04-17 18:48:32,484 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883308610]
[2020-04-17 18:48:32,484 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:32,484 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:32,484 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:32,485 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:32,485 INFO  L87              Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states.
[2020-04-17 18:48:33,327 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:33,327 INFO  L93              Difference]: Finished difference Result 94 states and 233 transitions.
[2020-04-17 18:48:33,328 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2020-04-17 18:48:33,328 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 24
[2020-04-17 18:48:33,328 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:33,328 INFO  L225             Difference]: With dead ends: 94
[2020-04-17 18:48:33,328 INFO  L226             Difference]: Without dead ends: 86
[2020-04-17 18:48:33,329 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862
[2020-04-17 18:48:33,329 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2020-04-17 18:48:33,330 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61.
[2020-04-17 18:48:33,330 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 61 states.
[2020-04-17 18:48:33,330 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions.
[2020-04-17 18:48:33,331 INFO  L78                 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24
[2020-04-17 18:48:33,331 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:33,331 INFO  L479      AbstractCegarLoop]: Abstraction has 61 states and 148 transitions.
[2020-04-17 18:48:33,331 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:33,331 INFO  L276                IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions.
[2020-04-17 18:48:33,331 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-04-17 18:48:33,331 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:33,332 INFO  L425         BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:33,532 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:33,532 INFO  L427      AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:33,533 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:33,533 INFO  L82        PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times
[2020-04-17 18:48:33,533 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:33,533 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105687133]
[2020-04-17 18:48:33,534 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:33,540 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:33,667 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:33,668 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105687133]
[2020-04-17 18:48:33,668 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011175816]
[2020-04-17 18:48:33,668 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:33,715 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:33,715 INFO  L264         TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core
[2020-04-17 18:48:33,716 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:33,730 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:33,742 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:33,742 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:33,742 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19
[2020-04-17 18:48:33,743 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691710463]
[2020-04-17 18:48:33,743 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:33,743 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:33,743 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:33,743 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:33,743 INFO  L87              Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states.
[2020-04-17 18:48:34,509 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:34,509 INFO  L93              Difference]: Finished difference Result 108 states and 263 transitions.
[2020-04-17 18:48:34,510 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. 
[2020-04-17 18:48:34,510 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 24
[2020-04-17 18:48:34,510 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:34,511 INFO  L225             Difference]: With dead ends: 108
[2020-04-17 18:48:34,511 INFO  L226             Difference]: Without dead ends: 103
[2020-04-17 18:48:34,511 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862
[2020-04-17 18:48:34,511 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 103 states.
[2020-04-17 18:48:34,512 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82.
[2020-04-17 18:48:34,513 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 82 states.
[2020-04-17 18:48:34,513 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions.
[2020-04-17 18:48:34,513 INFO  L78                 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24
[2020-04-17 18:48:34,513 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:34,513 INFO  L479      AbstractCegarLoop]: Abstraction has 82 states and 209 transitions.
[2020-04-17 18:48:34,513 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:34,513 INFO  L276                IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions.
[2020-04-17 18:48:34,514 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:34,514 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:34,514 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:34,714 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:34,715 INFO  L427      AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:34,715 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:34,715 INFO  L82        PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times
[2020-04-17 18:48:34,715 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:34,716 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38200689]
[2020-04-17 18:48:34,716 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:34,720 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:34,860 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:34,860 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38200689]
[2020-04-17 18:48:34,860 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733565143]
[2020-04-17 18:48:34,860 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:34,909 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:34,909 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:34,910 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:34,911 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:34,927 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:34,939 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:34,939 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:34,939 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:34,939 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947361715]
[2020-04-17 18:48:34,939 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:34,939 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:34,940 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:34,940 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:34,940 INFO  L87              Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states.
[2020-04-17 18:48:35,776 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:35,776 INFO  L93              Difference]: Finished difference Result 90 states and 229 transitions.
[2020-04-17 18:48:35,776 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. 
[2020-04-17 18:48:35,776 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:35,777 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:35,777 INFO  L225             Difference]: With dead ends: 90
[2020-04-17 18:48:35,777 INFO  L226             Difference]: Without dead ends: 85
[2020-04-17 18:48:35,777 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970
[2020-04-17 18:48:35,778 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 85 states.
[2020-04-17 18:48:35,779 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62.
[2020-04-17 18:48:35,779 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62 states.
[2020-04-17 18:48:35,779 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions.
[2020-04-17 18:48:35,779 INFO  L78                 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25
[2020-04-17 18:48:35,779 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:35,780 INFO  L479      AbstractCegarLoop]: Abstraction has 62 states and 152 transitions.
[2020-04-17 18:48:35,780 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:35,780 INFO  L276                IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions.
[2020-04-17 18:48:35,780 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:35,780 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:35,780 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:35,981 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:35,981 INFO  L427      AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:35,981 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:35,982 INFO  L82        PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times
[2020-04-17 18:48:35,982 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:35,982 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472812542]
[2020-04-17 18:48:35,982 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:35,987 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:36,184 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:36,184 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472812542]
[2020-04-17 18:48:36,184 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207725410]
[2020-04-17 18:48:36,184 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:36,239 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s)
[2020-04-17 18:48:36,239 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:36,240 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:36,241 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:36,248 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:36,248 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:36,248 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2020-04-17 18:48:36,248 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410881809]
[2020-04-17 18:48:36,248 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:36,249 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:36,249 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:36,249 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:36,249 INFO  L87              Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states.
[2020-04-17 18:48:36,547 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:36,547 INFO  L93              Difference]: Finished difference Result 96 states and 223 transitions.
[2020-04-17 18:48:36,547 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-04-17 18:48:36,547 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 25
[2020-04-17 18:48:36,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:36,548 INFO  L225             Difference]: With dead ends: 96
[2020-04-17 18:48:36,548 INFO  L226             Difference]: Without dead ends: 90
[2020-04-17 18:48:36,548 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406
[2020-04-17 18:48:36,549 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 90 states.
[2020-04-17 18:48:36,550 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70.
[2020-04-17 18:48:36,550 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-04-17 18:48:36,550 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions.
[2020-04-17 18:48:36,550 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25
[2020-04-17 18:48:36,551 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:36,551 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 171 transitions.
[2020-04-17 18:48:36,551 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:36,551 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions.
[2020-04-17 18:48:36,551 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:36,551 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:36,551 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:36,752 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:36,752 INFO  L427      AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:36,752 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:36,753 INFO  L82        PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times
[2020-04-17 18:48:36,753 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:36,753 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495891047]
[2020-04-17 18:48:36,753 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:36,758 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:36,960 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:36,960 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495891047]
[2020-04-17 18:48:36,961 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265545750]
[2020-04-17 18:48:36,961 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:37,009 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:37,009 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:37,010 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:37,010 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:37,024 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:37,030 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:37,030 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:37,030 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:37,031 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118544234]
[2020-04-17 18:48:37,031 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:37,031 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:37,031 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:37,031 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:37,031 INFO  L87              Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states.
[2020-04-17 18:48:37,420 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:37,420 INFO  L93              Difference]: Finished difference Result 114 states and 259 transitions.
[2020-04-17 18:48:37,420 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. 
[2020-04-17 18:48:37,420 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:37,421 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:37,421 INFO  L225             Difference]: With dead ends: 114
[2020-04-17 18:48:37,421 INFO  L226             Difference]: Without dead ends: 108
[2020-04-17 18:48:37,421 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560
[2020-04-17 18:48:37,422 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 108 states.
[2020-04-17 18:48:37,423 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68.
[2020-04-17 18:48:37,423 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 68 states.
[2020-04-17 18:48:37,423 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions.
[2020-04-17 18:48:37,423 INFO  L78                 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25
[2020-04-17 18:48:37,423 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:37,423 INFO  L479      AbstractCegarLoop]: Abstraction has 68 states and 167 transitions.
[2020-04-17 18:48:37,423 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:37,423 INFO  L276                IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions.
[2020-04-17 18:48:37,424 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:37,424 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:37,424 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:37,624 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:37,625 INFO  L427      AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:37,625 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:37,625 INFO  L82        PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times
[2020-04-17 18:48:37,625 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:37,626 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894491840]
[2020-04-17 18:48:37,626 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:37,631 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:37,837 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:37,837 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894491840]
[2020-04-17 18:48:37,838 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641412338]
[2020-04-17 18:48:37,838 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:37,888 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s)
[2020-04-17 18:48:37,889 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:37,890 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:37,890 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:37,897 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:37,897 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:37,897 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2020-04-17 18:48:37,897 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349550229]
[2020-04-17 18:48:37,897 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:37,897 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:37,898 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:37,898 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:37,898 INFO  L87              Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states.
[2020-04-17 18:48:38,304 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:38,304 INFO  L93              Difference]: Finished difference Result 115 states and 263 transitions.
[2020-04-17 18:48:38,304 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-04-17 18:48:38,305 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 25
[2020-04-17 18:48:38,305 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:38,305 INFO  L225             Difference]: With dead ends: 115
[2020-04-17 18:48:38,305 INFO  L226             Difference]: Without dead ends: 109
[2020-04-17 18:48:38,306 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640
[2020-04-17 18:48:38,306 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2020-04-17 18:48:38,307 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71.
[2020-04-17 18:48:38,307 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 71 states.
[2020-04-17 18:48:38,307 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions.
[2020-04-17 18:48:38,308 INFO  L78                 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25
[2020-04-17 18:48:38,308 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:38,308 INFO  L479      AbstractCegarLoop]: Abstraction has 71 states and 175 transitions.
[2020-04-17 18:48:38,308 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:38,308 INFO  L276                IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions.
[2020-04-17 18:48:38,308 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:38,308 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:38,309 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:38,509 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:38,509 INFO  L427      AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:38,509 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:38,509 INFO  L82        PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times
[2020-04-17 18:48:38,509 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:38,510 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047313757]
[2020-04-17 18:48:38,510 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:38,516 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:38,703 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:38,704 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047313757]
[2020-04-17 18:48:38,704 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095944577]
[2020-04-17 18:48:38,704 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:38,759 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s)
[2020-04-17 18:48:38,760 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:38,760 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:38,761 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:38,777 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:38,786 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:38,786 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:38,786 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:38,786 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058973920]
[2020-04-17 18:48:38,787 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:38,787 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:38,787 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:38,787 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:38,787 INFO  L87              Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states.
[2020-04-17 18:48:39,234 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:39,234 INFO  L93              Difference]: Finished difference Result 129 states and 291 transitions.
[2020-04-17 18:48:39,235 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:48:39,235 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:39,235 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:39,236 INFO  L225             Difference]: With dead ends: 129
[2020-04-17 18:48:39,236 INFO  L226             Difference]: Without dead ends: 123
[2020-04-17 18:48:39,236 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806
[2020-04-17 18:48:39,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 123 states.
[2020-04-17 18:48:39,238 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70.
[2020-04-17 18:48:39,239 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70 states.
[2020-04-17 18:48:39,239 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions.
[2020-04-17 18:48:39,239 INFO  L78                 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25
[2020-04-17 18:48:39,239 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:39,239 INFO  L479      AbstractCegarLoop]: Abstraction has 70 states and 173 transitions.
[2020-04-17 18:48:39,239 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:39,240 INFO  L276                IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions.
[2020-04-17 18:48:39,240 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:39,240 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:39,240 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:39,443 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:39,443 INFO  L427      AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:39,443 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:39,443 INFO  L82        PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times
[2020-04-17 18:48:39,444 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:39,444 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853004904]
[2020-04-17 18:48:39,444 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:39,448 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:39,629 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:39,629 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853004904]
[2020-04-17 18:48:39,629 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435281738]
[2020-04-17 18:48:39,630 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:39,675 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:39,676 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:39,676 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:39,684 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:39,684 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:39,684 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2020-04-17 18:48:39,684 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599038398]
[2020-04-17 18:48:39,685 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:39,685 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:39,685 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:39,685 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:39,685 INFO  L87              Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states.
[2020-04-17 18:48:40,110 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:40,110 INFO  L93              Difference]: Finished difference Result 129 states and 293 transitions.
[2020-04-17 18:48:40,111 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:48:40,111 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 25
[2020-04-17 18:48:40,111 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:40,111 INFO  L225             Difference]: With dead ends: 129
[2020-04-17 18:48:40,111 INFO  L226             Difference]: Without dead ends: 123
[2020-04-17 18:48:40,112 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892
[2020-04-17 18:48:40,112 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 123 states.
[2020-04-17 18:48:40,113 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73.
[2020-04-17 18:48:40,114 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 73 states.
[2020-04-17 18:48:40,114 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions.
[2020-04-17 18:48:40,114 INFO  L78                 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25
[2020-04-17 18:48:40,114 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:40,114 INFO  L479      AbstractCegarLoop]: Abstraction has 73 states and 181 transitions.
[2020-04-17 18:48:40,114 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:40,115 INFO  L276                IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions.
[2020-04-17 18:48:40,115 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:40,115 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:40,115 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:40,315 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:40,316 INFO  L427      AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:40,316 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:40,316 INFO  L82        PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times
[2020-04-17 18:48:40,317 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:40,317 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723185463]
[2020-04-17 18:48:40,317 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:40,322 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:40,505 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:40,506 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723185463]
[2020-04-17 18:48:40,506 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781253497]
[2020-04-17 18:48:40,506 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:40,555 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:40,555 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:40,555 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:40,556 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:40,574 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:40,582 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:40,583 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:40,583 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:40,583 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917327781]
[2020-04-17 18:48:40,583 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:40,583 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:40,584 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:40,584 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:40,584 INFO  L87              Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states.
[2020-04-17 18:48:41,079 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:41,079 INFO  L93              Difference]: Finished difference Result 126 states and 287 transitions.
[2020-04-17 18:48:41,080 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:48:41,080 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:41,080 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:41,081 INFO  L225             Difference]: With dead ends: 126
[2020-04-17 18:48:41,081 INFO  L226             Difference]: Without dead ends: 120
[2020-04-17 18:48:41,081 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980
[2020-04-17 18:48:41,082 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 120 states.
[2020-04-17 18:48:41,083 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72.
[2020-04-17 18:48:41,083 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 72 states.
[2020-04-17 18:48:41,084 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions.
[2020-04-17 18:48:41,084 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25
[2020-04-17 18:48:41,084 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:41,084 INFO  L479      AbstractCegarLoop]: Abstraction has 72 states and 179 transitions.
[2020-04-17 18:48:41,084 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:41,084 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions.
[2020-04-17 18:48:41,084 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:41,085 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:41,085 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:41,286 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:41,287 INFO  L427      AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:41,287 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:41,287 INFO  L82        PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times
[2020-04-17 18:48:41,287 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:41,288 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269823513]
[2020-04-17 18:48:41,288 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:41,293 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:41,466 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:41,467 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269823513]
[2020-04-17 18:48:41,467 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630521935]
[2020-04-17 18:48:41,467 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:41,519 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s)
[2020-04-17 18:48:41,519 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:41,520 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:41,521 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:41,544 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:41,544 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:41,544 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2020-04-17 18:48:41,544 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363624402]
[2020-04-17 18:48:41,544 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:41,544 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:41,544 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:41,545 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:41,545 INFO  L87              Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states.
[2020-04-17 18:48:42,045 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:42,045 INFO  L93              Difference]: Finished difference Result 127 states and 291 transitions.
[2020-04-17 18:48:42,046 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-04-17 18:48:42,046 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 25
[2020-04-17 18:48:42,046 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:42,047 INFO  L225             Difference]: With dead ends: 127
[2020-04-17 18:48:42,047 INFO  L226             Difference]: Without dead ends: 121
[2020-04-17 18:48:42,047 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070
[2020-04-17 18:48:42,047 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 121 states.
[2020-04-17 18:48:42,049 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75.
[2020-04-17 18:48:42,049 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-04-17 18:48:42,049 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions.
[2020-04-17 18:48:42,049 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25
[2020-04-17 18:48:42,049 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:42,049 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 187 transitions.
[2020-04-17 18:48:42,050 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:42,050 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions.
[2020-04-17 18:48:42,050 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:42,050 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:42,050 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:42,251 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:42,251 INFO  L427      AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:42,251 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:42,252 INFO  L82        PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times
[2020-04-17 18:48:42,252 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:42,252 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987875694]
[2020-04-17 18:48:42,252 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:42,257 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:42,429 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:42,429 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987875694]
[2020-04-17 18:48:42,429 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157033469]
[2020-04-17 18:48:42,429 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:42,475 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:42,475 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:42,476 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:42,476 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:42,490 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:42,498 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:42,499 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:42,499 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:42,499 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226885729]
[2020-04-17 18:48:42,499 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:42,499 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:42,499 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:42,499 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:42,499 INFO  L87              Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states.
[2020-04-17 18:48:43,087 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:43,087 INFO  L93              Difference]: Finished difference Result 124 states and 285 transitions.
[2020-04-17 18:48:43,088 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-04-17 18:48:43,088 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:43,088 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:43,088 INFO  L225             Difference]: With dead ends: 124
[2020-04-17 18:48:43,089 INFO  L226             Difference]: Without dead ends: 118
[2020-04-17 18:48:43,089 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162
[2020-04-17 18:48:43,089 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 118 states.
[2020-04-17 18:48:43,091 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74.
[2020-04-17 18:48:43,091 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:48:43,091 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions.
[2020-04-17 18:48:43,091 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25
[2020-04-17 18:48:43,091 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:43,091 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 185 transitions.
[2020-04-17 18:48:43,092 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:43,092 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions.
[2020-04-17 18:48:43,092 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:43,092 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:43,092 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:43,292 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:43,293 INFO  L427      AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:43,293 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:43,293 INFO  L82        PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times
[2020-04-17 18:48:43,294 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:43,294 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516268718]
[2020-04-17 18:48:43,294 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:43,299 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:43,482 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:43,482 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516268718]
[2020-04-17 18:48:43,483 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908281551]
[2020-04-17 18:48:43,483 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:43,536 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s)
[2020-04-17 18:48:43,536 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:43,537 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:43,538 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:43,564 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:43,565 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:43,565 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2020-04-17 18:48:43,565 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183591096]
[2020-04-17 18:48:43,565 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:43,565 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:43,566 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:43,566 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:43,566 INFO  L87              Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states.
[2020-04-17 18:48:44,106 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:44,106 INFO  L93              Difference]: Finished difference Result 125 states and 289 transitions.
[2020-04-17 18:48:44,107 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-04-17 18:48:44,107 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 25
[2020-04-17 18:48:44,107 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:44,107 INFO  L225             Difference]: With dead ends: 125
[2020-04-17 18:48:44,108 INFO  L226             Difference]: Without dead ends: 119
[2020-04-17 18:48:44,108 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256
[2020-04-17 18:48:44,108 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 119 states.
[2020-04-17 18:48:44,109 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77.
[2020-04-17 18:48:44,110 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 77 states.
[2020-04-17 18:48:44,110 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions.
[2020-04-17 18:48:44,110 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25
[2020-04-17 18:48:44,110 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:44,110 INFO  L479      AbstractCegarLoop]: Abstraction has 77 states and 193 transitions.
[2020-04-17 18:48:44,111 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:44,111 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions.
[2020-04-17 18:48:44,111 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:44,111 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:44,111 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:44,312 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:44,312 INFO  L427      AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:44,312 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:44,312 INFO  L82        PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times
[2020-04-17 18:48:44,313 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:44,313 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098561418]
[2020-04-17 18:48:44,313 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:44,318 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:44,478 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:44,479 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098561418]
[2020-04-17 18:48:44,479 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246054558]
[2020-04-17 18:48:44,479 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:44,531 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s)
[2020-04-17 18:48:44,532 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:44,532 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:44,533 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:44,547 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:44,556 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:44,557 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:44,557 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:44,557 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915210201]
[2020-04-17 18:48:44,557 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:44,557 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:44,557 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:44,557 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:44,557 INFO  L87              Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states.
[2020-04-17 18:48:45,217 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:45,217 INFO  L93              Difference]: Finished difference Result 122 states and 283 transitions.
[2020-04-17 18:48:45,217 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-04-17 18:48:45,217 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:45,218 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:45,218 INFO  L225             Difference]: With dead ends: 122
[2020-04-17 18:48:45,218 INFO  L226             Difference]: Without dead ends: 116
[2020-04-17 18:48:45,218 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352
[2020-04-17 18:48:45,219 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 116 states.
[2020-04-17 18:48:45,220 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76.
[2020-04-17 18:48:45,220 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 76 states.
[2020-04-17 18:48:45,220 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions.
[2020-04-17 18:48:45,221 INFO  L78                 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25
[2020-04-17 18:48:45,221 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:45,221 INFO  L479      AbstractCegarLoop]: Abstraction has 76 states and 191 transitions.
[2020-04-17 18:48:45,221 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:45,221 INFO  L276                IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions.
[2020-04-17 18:48:45,221 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:45,221 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:45,221 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:45,422 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:45,422 INFO  L427      AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:45,423 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:45,423 INFO  L82        PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times
[2020-04-17 18:48:45,423 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:45,423 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675781284]
[2020-04-17 18:48:45,424 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:45,428 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:45,586 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:45,586 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675781284]
[2020-04-17 18:48:45,586 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794315422]
[2020-04-17 18:48:45,586 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:45,632 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:45,633 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:45,633 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:45,643 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:45,644 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:45,644 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2020-04-17 18:48:45,644 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405940184]
[2020-04-17 18:48:45,644 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:45,644 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:45,644 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:45,644 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:45,645 INFO  L87              Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states.
[2020-04-17 18:48:46,232 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:46,232 INFO  L93              Difference]: Finished difference Result 123 states and 287 transitions.
[2020-04-17 18:48:46,233 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. 
[2020-04-17 18:48:46,233 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 25
[2020-04-17 18:48:46,233 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:46,234 INFO  L225             Difference]: With dead ends: 123
[2020-04-17 18:48:46,234 INFO  L226             Difference]: Without dead ends: 117
[2020-04-17 18:48:46,234 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450
[2020-04-17 18:48:46,235 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 117 states.
[2020-04-17 18:48:46,236 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79.
[2020-04-17 18:48:46,236 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 79 states.
[2020-04-17 18:48:46,236 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions.
[2020-04-17 18:48:46,236 INFO  L78                 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25
[2020-04-17 18:48:46,236 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:46,236 INFO  L479      AbstractCegarLoop]: Abstraction has 79 states and 199 transitions.
[2020-04-17 18:48:46,236 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:46,236 INFO  L276                IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions.
[2020-04-17 18:48:46,237 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:46,237 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:46,237 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:46,437 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:46,438 INFO  L427      AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:46,438 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:46,438 INFO  L82        PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times
[2020-04-17 18:48:46,438 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:46,439 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104467538]
[2020-04-17 18:48:46,439 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:46,445 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:46,640 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:46,640 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104467538]
[2020-04-17 18:48:46,641 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694376131]
[2020-04-17 18:48:46,641 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:46,687 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:46,687 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:46,688 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:46,689 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:46,704 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:46,713 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:46,713 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:46,713 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:46,713 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148588639]
[2020-04-17 18:48:46,714 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:46,714 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:46,714 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:46,714 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:46,714 INFO  L87              Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states.
[2020-04-17 18:48:47,421 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:47,421 INFO  L93              Difference]: Finished difference Result 120 states and 281 transitions.
[2020-04-17 18:48:47,422 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. 
[2020-04-17 18:48:47,422 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:47,422 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:47,422 INFO  L225             Difference]: With dead ends: 120
[2020-04-17 18:48:47,423 INFO  L226             Difference]: Without dead ends: 114
[2020-04-17 18:48:47,423 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550
[2020-04-17 18:48:47,423 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 114 states.
[2020-04-17 18:48:47,425 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78.
[2020-04-17 18:48:47,425 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 78 states.
[2020-04-17 18:48:47,425 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions.
[2020-04-17 18:48:47,425 INFO  L78                 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25
[2020-04-17 18:48:47,425 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:47,425 INFO  L479      AbstractCegarLoop]: Abstraction has 78 states and 197 transitions.
[2020-04-17 18:48:47,426 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:47,426 INFO  L276                IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions.
[2020-04-17 18:48:47,426 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:47,426 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:47,426 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:47,627 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:47,627 INFO  L427      AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:47,627 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:47,628 INFO  L82        PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times
[2020-04-17 18:48:47,628 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:47,628 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757514928]
[2020-04-17 18:48:47,628 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:47,633 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:47,789 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:47,790 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757514928]
[2020-04-17 18:48:47,790 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67769299]
[2020-04-17 18:48:47,790 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:47,844 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s)
[2020-04-17 18:48:47,844 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:47,846 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core
[2020-04-17 18:48:47,846 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:47,858 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:47,858 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:47,858 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2020-04-17 18:48:47,858 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394185067]
[2020-04-17 18:48:47,858 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:47,858 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:47,859 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:47,859 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:47,859 INFO  L87              Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states.
[2020-04-17 18:48:48,460 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:48,460 INFO  L93              Difference]: Finished difference Result 121 states and 285 transitions.
[2020-04-17 18:48:48,461 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. 
[2020-04-17 18:48:48,461 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 25
[2020-04-17 18:48:48,461 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:48,461 INFO  L225             Difference]: With dead ends: 121
[2020-04-17 18:48:48,462 INFO  L226             Difference]: Without dead ends: 115
[2020-04-17 18:48:48,462 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652
[2020-04-17 18:48:48,462 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 115 states.
[2020-04-17 18:48:48,464 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81.
[2020-04-17 18:48:48,464 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-04-17 18:48:48,464 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions.
[2020-04-17 18:48:48,464 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25
[2020-04-17 18:48:48,464 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:48,464 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 205 transitions.
[2020-04-17 18:48:48,465 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:48,465 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions.
[2020-04-17 18:48:48,465 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:48,465 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:48,465 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:48,665 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:48,666 INFO  L427      AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:48,666 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:48,666 INFO  L82        PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times
[2020-04-17 18:48:48,667 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:48,667 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737314224]
[2020-04-17 18:48:48,667 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:48,672 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:48,826 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:48,827 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737314224]
[2020-04-17 18:48:48,827 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689697452]
[2020-04-17 18:48:48,827 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:48,875 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:48,875 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:48,876 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:48,876 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:48,892 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:48,901 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:48,901 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:48,901 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:48,901 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821273668]
[2020-04-17 18:48:48,902 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:48,902 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:48,902 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:48,902 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:48,902 INFO  L87              Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states.
[2020-04-17 18:48:49,670 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:49,670 INFO  L93              Difference]: Finished difference Result 118 states and 279 transitions.
[2020-04-17 18:48:49,671 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. 
[2020-04-17 18:48:49,671 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:49,671 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:49,671 INFO  L225             Difference]: With dead ends: 118
[2020-04-17 18:48:49,672 INFO  L226             Difference]: Without dead ends: 112
[2020-04-17 18:48:49,672 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756
[2020-04-17 18:48:49,672 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2020-04-17 18:48:49,673 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80.
[2020-04-17 18:48:49,674 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-04-17 18:48:49,674 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions.
[2020-04-17 18:48:49,674 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25
[2020-04-17 18:48:49,674 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:49,674 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 203 transitions.
[2020-04-17 18:48:49,674 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:49,674 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions.
[2020-04-17 18:48:49,674 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:49,675 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:49,675 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:49,875 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:49,875 INFO  L427      AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:49,876 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:49,876 INFO  L82        PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times
[2020-04-17 18:48:49,876 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:49,876 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146284061]
[2020-04-17 18:48:49,877 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:49,882 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:50,032 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:50,032 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146284061]
[2020-04-17 18:48:50,032 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640381102]
[2020-04-17 18:48:50,033 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:50,082 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s)
[2020-04-17 18:48:50,083 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:50,084 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:50,084 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:50,096 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:50,096 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:50,096 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2020-04-17 18:48:50,096 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044692774]
[2020-04-17 18:48:50,096 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:50,097 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:50,097 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:50,097 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:50,097 INFO  L87              Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states.
[2020-04-17 18:48:50,760 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:50,761 INFO  L93              Difference]: Finished difference Result 119 states and 283 transitions.
[2020-04-17 18:48:50,761 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. 
[2020-04-17 18:48:50,761 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 25
[2020-04-17 18:48:50,761 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:50,762 INFO  L225             Difference]: With dead ends: 119
[2020-04-17 18:48:50,762 INFO  L226             Difference]: Without dead ends: 113
[2020-04-17 18:48:50,762 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862
[2020-04-17 18:48:50,763 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 113 states.
[2020-04-17 18:48:50,765 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83.
[2020-04-17 18:48:50,765 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 83 states.
[2020-04-17 18:48:50,765 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions.
[2020-04-17 18:48:50,765 INFO  L78                 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25
[2020-04-17 18:48:50,765 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:50,766 INFO  L479      AbstractCegarLoop]: Abstraction has 83 states and 211 transitions.
[2020-04-17 18:48:50,766 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:50,766 INFO  L276                IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions.
[2020-04-17 18:48:50,766 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:50,766 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:50,766 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:50,969 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:50,969 INFO  L427      AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:50,970 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:50,970 INFO  L82        PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times
[2020-04-17 18:48:50,970 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:50,970 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974436687]
[2020-04-17 18:48:50,970 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:50,975 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:51,126 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:51,126 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974436687]
[2020-04-17 18:48:51,127 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108069452]
[2020-04-17 18:48:51,127 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:51,179 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s)
[2020-04-17 18:48:51,179 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:51,180 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 26 conjunts are in the unsatisfiable core
[2020-04-17 18:48:51,180 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:51,222 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:51,223 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:51,223 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:51,223 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865745827]
[2020-04-17 18:48:51,223 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:51,223 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:51,223 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:51,223 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:51,223 INFO  L87              Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states.
[2020-04-17 18:48:52,020 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:52,020 INFO  L93              Difference]: Finished difference Result 116 states and 277 transitions.
[2020-04-17 18:48:52,021 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2020-04-17 18:48:52,021 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:52,021 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:52,021 INFO  L225             Difference]: With dead ends: 116
[2020-04-17 18:48:52,021 INFO  L226             Difference]: Without dead ends: 110
[2020-04-17 18:48:52,022 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=812, Invalid=2158, Unknown=0, NotChecked=0, Total=2970
[2020-04-17 18:48:52,022 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2020-04-17 18:48:52,026 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82.
[2020-04-17 18:48:52,026 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 82 states.
[2020-04-17 18:48:52,026 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions.
[2020-04-17 18:48:52,026 INFO  L78                 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25
[2020-04-17 18:48:52,027 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:52,027 INFO  L479      AbstractCegarLoop]: Abstraction has 82 states and 209 transitions.
[2020-04-17 18:48:52,027 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:52,027 INFO  L276                IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions.
[2020-04-17 18:48:52,027 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:52,027 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:52,027 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:52,230 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:52,231 INFO  L427      AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:52,231 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:52,231 INFO  L82        PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times
[2020-04-17 18:48:52,232 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:52,232 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946759587]
[2020-04-17 18:48:52,232 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:52,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:52,385 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:52,386 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946759587]
[2020-04-17 18:48:52,386 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805496412]
[2020-04-17 18:48:52,386 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:52,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:52,434 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core
[2020-04-17 18:48:52,435 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:52,448 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:52,448 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:52,449 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19
[2020-04-17 18:48:52,449 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222958443]
[2020-04-17 18:48:52,449 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-04-17 18:48:52,449 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:52,449 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-04-17 18:48:52,449 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420
[2020-04-17 18:48:52,450 INFO  L87              Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states.
[2020-04-17 18:48:53,359 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:53,359 INFO  L93              Difference]: Finished difference Result 136 states and 327 transitions.
[2020-04-17 18:48:53,360 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. 
[2020-04-17 18:48:53,360 INFO  L78                 Accepts]: Start accepts. Automaton has 21 states. Word has length 25
[2020-04-17 18:48:53,360 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:53,360 INFO  L225             Difference]: With dead ends: 136
[2020-04-17 18:48:53,360 INFO  L226             Difference]: Without dead ends: 130
[2020-04-17 18:48:53,361 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080
[2020-04-17 18:48:53,361 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 130 states.
[2020-04-17 18:48:53,362 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88.
[2020-04-17 18:48:53,362 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 88 states.
[2020-04-17 18:48:53,362 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions.
[2020-04-17 18:48:53,363 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25
[2020-04-17 18:48:53,363 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:53,363 INFO  L479      AbstractCegarLoop]: Abstraction has 88 states and 229 transitions.
[2020-04-17 18:48:53,363 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-04-17 18:48:53,363 INFO  L276                IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions.
[2020-04-17 18:48:53,364 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-04-17 18:48:53,364 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:53,364 INFO  L425         BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:53,569 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:53,569 INFO  L427      AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:53,569 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:53,569 INFO  L82        PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times
[2020-04-17 18:48:53,569 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:53,570 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880608811]
[2020-04-17 18:48:53,570 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:53,575 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:53,781 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:53,781 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880608811]
[2020-04-17 18:48:53,782 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945193079]
[2020-04-17 18:48:53,782 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:53,831 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:53,831 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:53,832 INFO  L264         TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:48:53,833 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:53,872 INFO  L134       CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:53,872 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:53,872 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20
[2020-04-17 18:48:53,873 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178019556]
[2020-04-17 18:48:53,873 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:53,873 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:53,873 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:53,873 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:53,873 INFO  L87              Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states.
[2020-04-17 18:48:54,716 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:54,716 INFO  L93              Difference]: Finished difference Result 117 states and 283 transitions.
[2020-04-17 18:48:54,716 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. 
[2020-04-17 18:48:54,717 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 25
[2020-04-17 18:48:54,717 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:54,717 INFO  L225             Difference]: With dead ends: 117
[2020-04-17 18:48:54,717 INFO  L226             Difference]: Without dead ends: 109
[2020-04-17 18:48:54,718 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192
[2020-04-17 18:48:54,718 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2020-04-17 18:48:54,720 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85.
[2020-04-17 18:48:54,720 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 85 states.
[2020-04-17 18:48:54,720 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions.
[2020-04-17 18:48:54,720 INFO  L78                 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25
[2020-04-17 18:48:54,721 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:54,721 INFO  L479      AbstractCegarLoop]: Abstraction has 85 states and 217 transitions.
[2020-04-17 18:48:54,721 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:54,721 INFO  L276                IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions.
[2020-04-17 18:48:54,721 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:48:54,721 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:54,721 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:54,922 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:54,922 INFO  L427      AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:54,922 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:54,923 INFO  L82        PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times
[2020-04-17 18:48:54,923 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:54,923 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96585093]
[2020-04-17 18:48:54,923 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:54,929 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:55,132 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:55,132 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96585093]
[2020-04-17 18:48:55,132 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324316067]
[2020-04-17 18:48:55,132 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:55,192 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s)
[2020-04-17 18:48:55,192 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:55,193 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:48:55,194 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:55,202 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:55,202 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:55,203 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2020-04-17 18:48:55,203 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959243041]
[2020-04-17 18:48:55,203 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:55,203 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:55,203 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:55,203 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:55,203 INFO  L87              Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states.
[2020-04-17 18:48:55,572 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:55,572 INFO  L93              Difference]: Finished difference Result 134 states and 315 transitions.
[2020-04-17 18:48:55,572 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:48:55,572 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 26
[2020-04-17 18:48:55,573 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:55,573 INFO  L225             Difference]: With dead ends: 134
[2020-04-17 18:48:55,573 INFO  L226             Difference]: Without dead ends: 128
[2020-04-17 18:48:55,573 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640
[2020-04-17 18:48:55,574 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 128 states.
[2020-04-17 18:48:55,575 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87.
[2020-04-17 18:48:55,575 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-04-17 18:48:55,575 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions.
[2020-04-17 18:48:55,575 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26
[2020-04-17 18:48:55,576 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:55,576 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 221 transitions.
[2020-04-17 18:48:55,576 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:55,576 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions.
[2020-04-17 18:48:55,576 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:48:55,576 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:55,576 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:55,776 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:55,777 INFO  L427      AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:55,777 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:55,777 INFO  L82        PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times
[2020-04-17 18:48:55,778 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:55,778 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302849978]
[2020-04-17 18:48:55,778 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:55,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:55,993 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:55,993 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302849978]
[2020-04-17 18:48:55,993 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163005975]
[2020-04-17 18:48:55,993 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:56,042 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:48:56,043 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:56,043 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:48:56,044 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:56,059 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:56,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:56,066 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:56,066 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:48:56,066 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008042665]
[2020-04-17 18:48:56,067 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:48:56,067 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:56,067 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:48:56,067 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:48:56,067 INFO  L87              Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states.
[2020-04-17 18:48:56,486 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:56,487 INFO  L93              Difference]: Finished difference Result 131 states and 309 transitions.
[2020-04-17 18:48:56,487 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:48:56,487 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:48:56,487 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:56,488 INFO  L225             Difference]: With dead ends: 131
[2020-04-17 18:48:56,488 INFO  L226             Difference]: Without dead ends: 125
[2020-04-17 18:48:56,488 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892
[2020-04-17 18:48:56,489 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 125 states.
[2020-04-17 18:48:56,490 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86.
[2020-04-17 18:48:56,490 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-04-17 18:48:56,490 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions.
[2020-04-17 18:48:56,490 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26
[2020-04-17 18:48:56,490 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:56,490 INFO  L479      AbstractCegarLoop]: Abstraction has 86 states and 219 transitions.
[2020-04-17 18:48:56,490 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:48:56,491 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions.
[2020-04-17 18:48:56,491 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:48:56,491 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:56,491 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:56,691 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:56,692 INFO  L427      AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:56,692 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:56,692 INFO  L82        PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times
[2020-04-17 18:48:56,692 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:56,693 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723977146]
[2020-04-17 18:48:56,693 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:56,698 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:56,893 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:56,893 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723977146]
[2020-04-17 18:48:56,893 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956380497]
[2020-04-17 18:48:56,893 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:56,944 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s)
[2020-04-17 18:48:56,944 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:56,945 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:48:56,946 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:56,977 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:56,977 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:56,977 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2020-04-17 18:48:56,977 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956216447]
[2020-04-17 18:48:56,978 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:56,978 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:56,978 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:56,978 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:56,978 INFO  L87              Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states.
[2020-04-17 18:48:57,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:57,418 INFO  L93              Difference]: Finished difference Result 128 states and 303 transitions.
[2020-04-17 18:48:57,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. 
[2020-04-17 18:48:57,418 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 26
[2020-04-17 18:48:57,418 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:57,419 INFO  L225             Difference]: With dead ends: 128
[2020-04-17 18:48:57,419 INFO  L226             Difference]: Without dead ends: 122
[2020-04-17 18:48:57,419 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806
[2020-04-17 18:48:57,419 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 122 states.
[2020-04-17 18:48:57,421 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87.
[2020-04-17 18:48:57,421 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-04-17 18:48:57,421 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions.
[2020-04-17 18:48:57,421 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26
[2020-04-17 18:48:57,422 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:57,422 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 221 transitions.
[2020-04-17 18:48:57,422 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:57,422 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions.
[2020-04-17 18:48:57,422 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:48:57,422 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:57,422 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:57,623 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:57,623 INFO  L427      AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:57,624 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:57,624 INFO  L82        PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times
[2020-04-17 18:48:57,624 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:57,624 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162544378]
[2020-04-17 18:48:57,625 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:57,629 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:57,838 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:57,838 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162544378]
[2020-04-17 18:48:57,839 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193232503]
[2020-04-17 18:48:57,839 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:57,893 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s)
[2020-04-17 18:48:57,893 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:57,894 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:48:57,895 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:57,924 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:57,932 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:57,932 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:57,932 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:48:57,932 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927343751]
[2020-04-17 18:48:57,932 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:48:57,932 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:57,933 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:48:57,933 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:48:57,933 INFO  L87              Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states.
[2020-04-17 18:48:58,484 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:58,484 INFO  L93              Difference]: Finished difference Result 127 states and 301 transitions.
[2020-04-17 18:48:58,484 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:48:58,484 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:48:58,484 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:58,485 INFO  L225             Difference]: With dead ends: 127
[2020-04-17 18:48:58,485 INFO  L226             Difference]: Without dead ends: 121
[2020-04-17 18:48:58,485 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070
[2020-04-17 18:48:58,486 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 121 states.
[2020-04-17 18:48:58,487 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86.
[2020-04-17 18:48:58,487 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-04-17 18:48:58,487 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions.
[2020-04-17 18:48:58,488 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26
[2020-04-17 18:48:58,488 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:58,488 INFO  L479      AbstractCegarLoop]: Abstraction has 86 states and 219 transitions.
[2020-04-17 18:48:58,488 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:48:58,488 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions.
[2020-04-17 18:48:58,488 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:48:58,488 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:58,489 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:58,689 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:58,690 INFO  L427      AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:58,690 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:58,690 INFO  L82        PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times
[2020-04-17 18:48:58,690 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:58,691 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891081505]
[2020-04-17 18:48:58,691 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:58,696 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:58,882 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:58,882 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891081505]
[2020-04-17 18:48:58,882 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491653985]
[2020-04-17 18:48:58,882 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:58,929 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:58,930 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:48:58,931 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:58,944 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:58,944 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:58,944 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2020-04-17 18:48:58,944 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22750917]
[2020-04-17 18:48:58,944 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:48:58,945 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:58,945 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:48:58,945 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:48:58,945 INFO  L87              Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states.
[2020-04-17 18:48:59,444 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:48:59,444 INFO  L93              Difference]: Finished difference Result 124 states and 295 transitions.
[2020-04-17 18:48:59,444 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:48:59,444 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 26
[2020-04-17 18:48:59,445 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:48:59,445 INFO  L225             Difference]: With dead ends: 124
[2020-04-17 18:48:59,445 INFO  L226             Difference]: Without dead ends: 118
[2020-04-17 18:48:59,446 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980
[2020-04-17 18:48:59,446 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 118 states.
[2020-04-17 18:48:59,448 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87.
[2020-04-17 18:48:59,448 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-04-17 18:48:59,448 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions.
[2020-04-17 18:48:59,448 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26
[2020-04-17 18:48:59,449 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:48:59,449 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 221 transitions.
[2020-04-17 18:48:59,449 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:48:59,449 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions.
[2020-04-17 18:48:59,449 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:48:59,449 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:48:59,449 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:48:59,652 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:59,653 INFO  L427      AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:48:59,653 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:48:59,653 INFO  L82        PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times
[2020-04-17 18:48:59,653 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:48:59,654 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15739071]
[2020-04-17 18:48:59,654 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:48:59,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:48:59,847 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:59,847 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15739071]
[2020-04-17 18:48:59,848 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104032688]
[2020-04-17 18:48:59,848 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:48:59,901 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:48:59,901 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:48:59,902 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:48:59,902 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:48:59,917 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:48:59,926 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:48:59,926 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:48:59,926 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:48:59,926 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817965875]
[2020-04-17 18:48:59,927 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:48:59,927 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:48:59,927 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:48:59,927 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:48:59,927 INFO  L87              Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states.
[2020-04-17 18:49:00,531 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:00,532 INFO  L93              Difference]: Finished difference Result 123 states and 293 transitions.
[2020-04-17 18:49:00,532 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-04-17 18:49:00,532 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:49:00,532 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:00,533 INFO  L225             Difference]: With dead ends: 123
[2020-04-17 18:49:00,533 INFO  L226             Difference]: Without dead ends: 117
[2020-04-17 18:49:00,533 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256
[2020-04-17 18:49:00,533 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 117 states.
[2020-04-17 18:49:00,535 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86.
[2020-04-17 18:49:00,535 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-04-17 18:49:00,535 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions.
[2020-04-17 18:49:00,535 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26
[2020-04-17 18:49:00,535 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:00,535 INFO  L479      AbstractCegarLoop]: Abstraction has 86 states and 219 transitions.
[2020-04-17 18:49:00,536 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:00,536 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions.
[2020-04-17 18:49:00,536 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:00,536 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:00,536 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:00,736 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:00,737 INFO  L427      AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:00,737 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:00,737 INFO  L82        PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times
[2020-04-17 18:49:00,737 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:00,738 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099403236]
[2020-04-17 18:49:00,738 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:00,743 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:00,936 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:00,936 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099403236]
[2020-04-17 18:49:00,936 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862630575]
[2020-04-17 18:49:00,936 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:00,990 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s)
[2020-04-17 18:49:00,990 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:00,991 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:00,992 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:01,002 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:01,002 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:01,002 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2020-04-17 18:49:01,002 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910624408]
[2020-04-17 18:49:01,003 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:49:01,003 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:01,003 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:49:01,003 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:49:01,003 INFO  L87              Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states.
[2020-04-17 18:49:01,523 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:01,523 INFO  L93              Difference]: Finished difference Result 120 states and 287 transitions.
[2020-04-17 18:49:01,523 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-04-17 18:49:01,524 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 26
[2020-04-17 18:49:01,524 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:01,524 INFO  L225             Difference]: With dead ends: 120
[2020-04-17 18:49:01,524 INFO  L226             Difference]: Without dead ends: 114
[2020-04-17 18:49:01,525 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162
[2020-04-17 18:49:01,525 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 114 states.
[2020-04-17 18:49:01,526 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87.
[2020-04-17 18:49:01,526 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-04-17 18:49:01,527 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions.
[2020-04-17 18:49:01,527 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26
[2020-04-17 18:49:01,527 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:01,527 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 221 transitions.
[2020-04-17 18:49:01,527 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:49:01,527 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions.
[2020-04-17 18:49:01,528 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:01,528 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:01,528 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:01,728 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:01,729 INFO  L427      AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:01,729 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:01,729 INFO  L82        PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times
[2020-04-17 18:49:01,730 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:01,730 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179989302]
[2020-04-17 18:49:01,730 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:01,735 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:01,910 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:01,911 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179989302]
[2020-04-17 18:49:01,911 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008517413]
[2020-04-17 18:49:01,911 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:01,960 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:49:01,960 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:01,961 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:01,962 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:01,979 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:02,001 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:02,001 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:02,002 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:49:02,002 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677299556]
[2020-04-17 18:49:02,002 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:02,002 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:02,002 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:02,002 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:02,003 INFO  L87              Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states.
[2020-04-17 18:49:02,685 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:02,685 INFO  L93              Difference]: Finished difference Result 119 states and 285 transitions.
[2020-04-17 18:49:02,686 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-04-17 18:49:02,686 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:49:02,686 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:02,687 INFO  L225             Difference]: With dead ends: 119
[2020-04-17 18:49:02,687 INFO  L226             Difference]: Without dead ends: 113
[2020-04-17 18:49:02,690 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450
[2020-04-17 18:49:02,691 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 113 states.
[2020-04-17 18:49:02,692 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86.
[2020-04-17 18:49:02,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-04-17 18:49:02,692 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions.
[2020-04-17 18:49:02,692 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26
[2020-04-17 18:49:02,692 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:02,692 INFO  L479      AbstractCegarLoop]: Abstraction has 86 states and 219 transitions.
[2020-04-17 18:49:02,693 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:02,693 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions.
[2020-04-17 18:49:02,693 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:02,693 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:02,693 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:02,896 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:02,896 INFO  L427      AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:02,896 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:02,896 INFO  L82        PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times
[2020-04-17 18:49:02,897 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:02,897 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174997046]
[2020-04-17 18:49:02,897 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:02,901 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:03,074 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:03,074 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174997046]
[2020-04-17 18:49:03,074 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522835273]
[2020-04-17 18:49:03,075 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:03,129 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s)
[2020-04-17 18:49:03,129 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:03,130 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:03,131 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:03,141 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:03,141 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:03,141 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2020-04-17 18:49:03,141 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089421148]
[2020-04-17 18:49:03,141 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:49:03,141 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:03,141 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:49:03,142 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:49:03,142 INFO  L87              Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states.
[2020-04-17 18:49:03,719 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:03,719 INFO  L93              Difference]: Finished difference Result 116 states and 279 transitions.
[2020-04-17 18:49:03,719 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-04-17 18:49:03,720 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 26
[2020-04-17 18:49:03,720 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:03,720 INFO  L225             Difference]: With dead ends: 116
[2020-04-17 18:49:03,721 INFO  L226             Difference]: Without dead ends: 110
[2020-04-17 18:49:03,721 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352
[2020-04-17 18:49:03,721 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 110 states.
[2020-04-17 18:49:03,722 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87.
[2020-04-17 18:49:03,723 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-04-17 18:49:03,723 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions.
[2020-04-17 18:49:03,723 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26
[2020-04-17 18:49:03,723 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:03,723 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 221 transitions.
[2020-04-17 18:49:03,723 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:49:03,724 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions.
[2020-04-17 18:49:03,724 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:03,724 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:03,724 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:03,924 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:03,925 INFO  L427      AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:03,925 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:03,925 INFO  L82        PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times
[2020-04-17 18:49:03,926 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:03,926 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135520128]
[2020-04-17 18:49:03,926 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:03,932 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:04,128 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:04,129 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135520128]
[2020-04-17 18:49:04,129 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152984225]
[2020-04-17 18:49:04,129 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:04,184 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s)
[2020-04-17 18:49:04,184 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:04,186 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:04,186 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:04,202 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:04,211 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:04,211 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:04,211 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:49:04,211 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441345267]
[2020-04-17 18:49:04,212 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:04,212 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:04,212 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:04,212 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:04,212 INFO  L87              Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states.
[2020-04-17 18:49:04,945 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:04,945 INFO  L93              Difference]: Finished difference Result 115 states and 277 transitions.
[2020-04-17 18:49:04,946 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. 
[2020-04-17 18:49:04,946 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:49:04,946 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:04,946 INFO  L225             Difference]: With dead ends: 115
[2020-04-17 18:49:04,947 INFO  L226             Difference]: Without dead ends: 109
[2020-04-17 18:49:04,947 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652
[2020-04-17 18:49:04,948 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2020-04-17 18:49:04,949 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86.
[2020-04-17 18:49:04,949 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-04-17 18:49:04,950 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions.
[2020-04-17 18:49:04,950 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26
[2020-04-17 18:49:04,950 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:04,950 INFO  L479      AbstractCegarLoop]: Abstraction has 86 states and 219 transitions.
[2020-04-17 18:49:04,950 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:04,950 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions.
[2020-04-17 18:49:04,950 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:04,951 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:04,951 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:05,151 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:05,151 INFO  L427      AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:05,152 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:05,152 INFO  L82        PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times
[2020-04-17 18:49:05,152 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:05,153 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804177688]
[2020-04-17 18:49:05,153 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:05,158 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:05,326 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:05,327 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804177688]
[2020-04-17 18:49:05,327 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926776821]
[2020-04-17 18:49:05,327 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:05,377 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:05,378 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:05,378 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:05,389 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:05,389 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:05,389 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2020-04-17 18:49:05,390 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299871224]
[2020-04-17 18:49:05,390 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:49:05,390 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:05,390 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:49:05,390 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:49:05,390 INFO  L87              Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states.
[2020-04-17 18:49:06,017 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:06,017 INFO  L93              Difference]: Finished difference Result 112 states and 271 transitions.
[2020-04-17 18:49:06,018 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. 
[2020-04-17 18:49:06,018 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 26
[2020-04-17 18:49:06,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:06,019 INFO  L225             Difference]: With dead ends: 112
[2020-04-17 18:49:06,019 INFO  L226             Difference]: Without dead ends: 106
[2020-04-17 18:49:06,019 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550
[2020-04-17 18:49:06,019 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 106 states.
[2020-04-17 18:49:06,021 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87.
[2020-04-17 18:49:06,021 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-04-17 18:49:06,021 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions.
[2020-04-17 18:49:06,021 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26
[2020-04-17 18:49:06,021 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:06,021 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 221 transitions.
[2020-04-17 18:49:06,022 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:49:06,022 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions.
[2020-04-17 18:49:06,022 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:06,022 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:06,022 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:06,222 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:06,223 INFO  L427      AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:06,223 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:06,223 INFO  L82        PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times
[2020-04-17 18:49:06,224 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:06,224 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739694210]
[2020-04-17 18:49:06,224 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:06,229 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:06,398 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:06,398 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739694210]
[2020-04-17 18:49:06,398 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754627978]
[2020-04-17 18:49:06,398 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:06,446 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:49:06,446 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:06,447 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:06,448 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:06,464 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:06,478 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:06,478 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:06,478 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:49:06,478 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070435731]
[2020-04-17 18:49:06,478 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:06,478 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:06,478 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:06,479 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:06,479 INFO  L87              Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states.
[2020-04-17 18:49:07,286 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:07,287 INFO  L93              Difference]: Finished difference Result 111 states and 269 transitions.
[2020-04-17 18:49:07,287 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. 
[2020-04-17 18:49:07,287 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:49:07,287 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:07,288 INFO  L225             Difference]: With dead ends: 111
[2020-04-17 18:49:07,288 INFO  L226             Difference]: Without dead ends: 105
[2020-04-17 18:49:07,288 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862
[2020-04-17 18:49:07,288 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 105 states.
[2020-04-17 18:49:07,289 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86.
[2020-04-17 18:49:07,290 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-04-17 18:49:07,290 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions.
[2020-04-17 18:49:07,290 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26
[2020-04-17 18:49:07,290 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:07,290 INFO  L479      AbstractCegarLoop]: Abstraction has 86 states and 219 transitions.
[2020-04-17 18:49:07,291 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:07,291 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions.
[2020-04-17 18:49:07,291 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:07,291 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:07,291 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:07,492 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:07,492 INFO  L427      AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:07,492 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:07,493 INFO  L82        PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times
[2020-04-17 18:49:07,493 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:07,493 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435742725]
[2020-04-17 18:49:07,493 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:07,498 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:07,654 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:07,654 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435742725]
[2020-04-17 18:49:07,654 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492380335]
[2020-04-17 18:49:07,654 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:07,707 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s)
[2020-04-17 18:49:07,707 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:07,708 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 29 conjunts are in the unsatisfiable core
[2020-04-17 18:49:07,709 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:07,721 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:07,721 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:07,722 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2020-04-17 18:49:07,722 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135592905]
[2020-04-17 18:49:07,722 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:49:07,722 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:07,722 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:49:07,722 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:49:07,722 INFO  L87              Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states.
[2020-04-17 18:49:08,378 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:08,378 INFO  L93              Difference]: Finished difference Result 108 states and 263 transitions.
[2020-04-17 18:49:08,379 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. 
[2020-04-17 18:49:08,379 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 26
[2020-04-17 18:49:08,379 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:08,379 INFO  L225             Difference]: With dead ends: 108
[2020-04-17 18:49:08,380 INFO  L226             Difference]: Without dead ends: 102
[2020-04-17 18:49:08,380 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756
[2020-04-17 18:49:08,380 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 102 states.
[2020-04-17 18:49:08,381 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87.
[2020-04-17 18:49:08,382 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-04-17 18:49:08,382 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions.
[2020-04-17 18:49:08,382 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26
[2020-04-17 18:49:08,382 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:08,382 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 221 transitions.
[2020-04-17 18:49:08,383 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:49:08,383 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions.
[2020-04-17 18:49:08,383 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:08,383 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:08,383 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:08,585 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:08,585 INFO  L427      AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:08,585 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:08,585 INFO  L82        PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times
[2020-04-17 18:49:08,585 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:08,585 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431420012]
[2020-04-17 18:49:08,586 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:08,591 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:08,754 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:08,754 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431420012]
[2020-04-17 18:49:08,755 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310901427]
[2020-04-17 18:49:08,755 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:08,804 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:49:08,805 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:08,805 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:08,806 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:08,831 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:08,842 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:08,842 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:08,842 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:49:08,843 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978391062]
[2020-04-17 18:49:08,843 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:08,843 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:08,843 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:08,843 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:08,843 INFO  L87              Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states.
[2020-04-17 18:49:09,711 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:09,711 INFO  L93              Difference]: Finished difference Result 107 states and 261 transitions.
[2020-04-17 18:49:09,712 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2020-04-17 18:49:09,712 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:49:09,712 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:09,713 INFO  L225             Difference]: With dead ends: 107
[2020-04-17 18:49:09,713 INFO  L226             Difference]: Without dead ends: 101
[2020-04-17 18:49:09,713 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080
[2020-04-17 18:49:09,714 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-04-17 18:49:09,715 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86.
[2020-04-17 18:49:09,715 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-04-17 18:49:09,716 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions.
[2020-04-17 18:49:09,716 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26
[2020-04-17 18:49:09,716 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:09,716 INFO  L479      AbstractCegarLoop]: Abstraction has 86 states and 219 transitions.
[2020-04-17 18:49:09,716 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:09,716 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions.
[2020-04-17 18:49:09,717 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:09,717 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:09,717 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:09,919 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:09,920 INFO  L427      AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:09,920 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:09,920 INFO  L82        PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times
[2020-04-17 18:49:09,921 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:09,921 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285201512]
[2020-04-17 18:49:09,921 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:09,926 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:10,082 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:10,083 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285201512]
[2020-04-17 18:49:10,083 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175532441]
[2020-04-17 18:49:10,083 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:10,135 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s)
[2020-04-17 18:49:10,135 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:10,136 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:10,137 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:10,151 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:10,151 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:10,151 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2020-04-17 18:49:10,151 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844146705]
[2020-04-17 18:49:10,151 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:49:10,151 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:10,152 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:49:10,152 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:49:10,152 INFO  L87              Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states.
[2020-04-17 18:49:10,869 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:10,869 INFO  L93              Difference]: Finished difference Result 104 states and 255 transitions.
[2020-04-17 18:49:10,870 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. 
[2020-04-17 18:49:10,870 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 26
[2020-04-17 18:49:10,870 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:10,871 INFO  L225             Difference]: With dead ends: 104
[2020-04-17 18:49:10,871 INFO  L226             Difference]: Without dead ends: 98
[2020-04-17 18:49:10,871 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970
[2020-04-17 18:49:10,872 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-04-17 18:49:10,872 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87.
[2020-04-17 18:49:10,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-04-17 18:49:10,873 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions.
[2020-04-17 18:49:10,873 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26
[2020-04-17 18:49:10,873 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:10,873 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 221 transitions.
[2020-04-17 18:49:10,873 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:49:10,873 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions.
[2020-04-17 18:49:10,873 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:10,873 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:10,873 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:11,074 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 189 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:11,074 INFO  L427      AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:11,075 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:11,075 INFO  L82        PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times
[2020-04-17 18:49:11,075 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:11,075 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900264981]
[2020-04-17 18:49:11,076 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:11,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:11,239 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:11,239 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900264981]
[2020-04-17 18:49:11,239 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632872619]
[2020-04-17 18:49:11,239 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:11,297 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s)
[2020-04-17 18:49:11,298 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:11,299 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 27 conjunts are in the unsatisfiable core
[2020-04-17 18:49:11,300 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:11,329 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:11,330 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:11,330 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:49:11,330 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477523610]
[2020-04-17 18:49:11,330 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:11,330 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:11,330 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:11,330 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:11,330 INFO  L87              Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states.
[2020-04-17 18:49:12,187 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:12,187 INFO  L93              Difference]: Finished difference Result 101 states and 249 transitions.
[2020-04-17 18:49:12,187 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2020-04-17 18:49:12,188 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:49:12,188 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:12,188 INFO  L225             Difference]: With dead ends: 101
[2020-04-17 18:49:12,188 INFO  L226             Difference]: Without dead ends: 95
[2020-04-17 18:49:12,189 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=825, Invalid=2255, Unknown=0, NotChecked=0, Total=3080
[2020-04-17 18:49:12,189 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 95 states.
[2020-04-17 18:49:12,190 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 86.
[2020-04-17 18:49:12,190 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-04-17 18:49:12,191 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions.
[2020-04-17 18:49:12,191 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26
[2020-04-17 18:49:12,191 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:12,191 INFO  L479      AbstractCegarLoop]: Abstraction has 86 states and 219 transitions.
[2020-04-17 18:49:12,191 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:12,191 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions.
[2020-04-17 18:49:12,191 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:12,192 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:12,192 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:12,392 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:12,392 INFO  L427      AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:12,393 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:12,393 INFO  L82        PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times
[2020-04-17 18:49:12,393 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:12,394 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045923936]
[2020-04-17 18:49:12,394 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:12,401 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:12,551 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:12,551 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045923936]
[2020-04-17 18:49:12,551 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990363262]
[2020-04-17 18:49:12,552 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:12,604 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:12,604 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:12,605 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:12,618 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:12,618 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:12,618 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20
[2020-04-17 18:49:12,619 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432227365]
[2020-04-17 18:49:12,619 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-04-17 18:49:12,619 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:12,619 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-04-17 18:49:12,619 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462
[2020-04-17 18:49:12,619 INFO  L87              Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states.
[2020-04-17 18:49:13,356 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:13,356 INFO  L93              Difference]: Finished difference Result 119 states and 293 transitions.
[2020-04-17 18:49:13,357 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. 
[2020-04-17 18:49:13,357 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 26
[2020-04-17 18:49:13,357 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:13,357 INFO  L225             Difference]: With dead ends: 119
[2020-04-17 18:49:13,358 INFO  L226             Difference]: Without dead ends: 113
[2020-04-17 18:49:13,358 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192
[2020-04-17 18:49:13,358 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 113 states.
[2020-04-17 18:49:13,360 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90.
[2020-04-17 18:49:13,360 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 90 states.
[2020-04-17 18:49:13,360 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions.
[2020-04-17 18:49:13,361 INFO  L78                 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26
[2020-04-17 18:49:13,361 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:13,361 INFO  L479      AbstractCegarLoop]: Abstraction has 90 states and 233 transitions.
[2020-04-17 18:49:13,361 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-04-17 18:49:13,361 INFO  L276                IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions.
[2020-04-17 18:49:13,361 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:13,361 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:13,361 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:13,561 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:13,562 INFO  L427      AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:13,562 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:13,562 INFO  L82        PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times
[2020-04-17 18:49:13,563 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:13,563 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916835604]
[2020-04-17 18:49:13,563 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:13,568 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:13,725 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:13,726 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916835604]
[2020-04-17 18:49:13,726 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001786018]
[2020-04-17 18:49:13,726 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:13,774 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:49:13,774 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:13,775 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:13,775 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:13,792 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:13,804 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:13,804 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:13,805 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:49:13,805 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927926185]
[2020-04-17 18:49:13,805 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:13,805 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:13,805 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:13,805 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:13,806 INFO  L87              Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states.
[2020-04-17 18:49:14,772 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:14,773 INFO  L93              Difference]: Finished difference Result 100 states and 249 transitions.
[2020-04-17 18:49:14,773 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. 
[2020-04-17 18:49:14,773 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:49:14,773 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:14,774 INFO  L225             Difference]: With dead ends: 100
[2020-04-17 18:49:14,774 INFO  L226             Difference]: Without dead ends: 92
[2020-04-17 18:49:14,774 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540
[2020-04-17 18:49:14,775 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 92 states.
[2020-04-17 18:49:14,776 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65.
[2020-04-17 18:49:14,776 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 65 states.
[2020-04-17 18:49:14,776 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions.
[2020-04-17 18:49:14,777 INFO  L78                 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26
[2020-04-17 18:49:14,777 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:14,777 INFO  L479      AbstractCegarLoop]: Abstraction has 65 states and 158 transitions.
[2020-04-17 18:49:14,777 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:14,777 INFO  L276                IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions.
[2020-04-17 18:49:14,777 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-04-17 18:49:14,777 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:14,777 INFO  L425         BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:14,979 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:14,979 INFO  L427      AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:14,980 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:14,980 INFO  L82        PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times
[2020-04-17 18:49:14,980 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:14,980 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6833932]
[2020-04-17 18:49:14,981 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:14,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:15,142 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:15,142 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6833932]
[2020-04-17 18:49:15,143 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401007462]
[2020-04-17 18:49:15,143 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:15,198 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s)
[2020-04-17 18:49:15,198 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:15,199 INFO  L264         TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core
[2020-04-17 18:49:15,200 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:15,216 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:15,228 INFO  L134       CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:15,229 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:15,229 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21
[2020-04-17 18:49:15,229 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813187564]
[2020-04-17 18:49:15,229 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:15,229 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:15,229 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:15,229 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:15,230 INFO  L87              Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states.
[2020-04-17 18:49:16,148 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:16,148 INFO  L93              Difference]: Finished difference Result 116 states and 283 transitions.
[2020-04-17 18:49:16,149 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. 
[2020-04-17 18:49:16,149 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 26
[2020-04-17 18:49:16,149 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:16,149 INFO  L225             Difference]: With dead ends: 116
[2020-04-17 18:49:16,150 INFO  L226             Difference]: Without dead ends: 111
[2020-04-17 18:49:16,150 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540
[2020-04-17 18:49:16,150 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2020-04-17 18:49:16,151 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88.
[2020-04-17 18:49:16,152 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 88 states.
[2020-04-17 18:49:16,152 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions.
[2020-04-17 18:49:16,152 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26
[2020-04-17 18:49:16,152 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:16,152 INFO  L479      AbstractCegarLoop]: Abstraction has 88 states and 225 transitions.
[2020-04-17 18:49:16,152 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:16,153 INFO  L276                IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions.
[2020-04-17 18:49:16,153 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:16,153 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:16,153 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:16,353 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:16,354 INFO  L427      AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:16,354 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:16,354 INFO  L82        PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times
[2020-04-17 18:49:16,355 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:16,355 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953092014]
[2020-04-17 18:49:16,355 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:16,360 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:16,526 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:16,526 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953092014]
[2020-04-17 18:49:16,526 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569730767]
[2020-04-17 18:49:16,526 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:16,576 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:49:16,576 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:16,577 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:16,577 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:16,592 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:16,607 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:16,607 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:16,607 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:16,607 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167886674]
[2020-04-17 18:49:16,608 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:16,608 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:16,608 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:16,608 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:16,608 INFO  L87              Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states.
[2020-04-17 18:49:17,551 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:17,552 INFO  L93              Difference]: Finished difference Result 96 states and 245 transitions.
[2020-04-17 18:49:17,552 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. 
[2020-04-17 18:49:17,552 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:17,552 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:17,553 INFO  L225             Difference]: With dead ends: 96
[2020-04-17 18:49:17,553 INFO  L226             Difference]: Without dead ends: 91
[2020-04-17 18:49:17,553 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660
[2020-04-17 18:49:17,553 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 91 states.
[2020-04-17 18:49:17,554 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66.
[2020-04-17 18:49:17,555 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2020-04-17 18:49:17,555 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions.
[2020-04-17 18:49:17,555 INFO  L78                 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27
[2020-04-17 18:49:17,555 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:17,555 INFO  L479      AbstractCegarLoop]: Abstraction has 66 states and 162 transitions.
[2020-04-17 18:49:17,555 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:17,555 INFO  L276                IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions.
[2020-04-17 18:49:17,556 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:17,556 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:17,556 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:17,756 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:17,757 INFO  L427      AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:17,757 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:17,757 INFO  L82        PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times
[2020-04-17 18:49:17,757 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:17,758 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645282635]
[2020-04-17 18:49:17,758 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:17,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:17,991 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:17,992 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645282635]
[2020-04-17 18:49:17,992 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366171507]
[2020-04-17 18:49:17,992 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:18,045 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s)
[2020-04-17 18:49:18,045 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:18,047 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:18,047 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:18,053 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:18,053 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:18,053 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:18,053 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068202161]
[2020-04-17 18:49:18,053 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:18,053 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:18,053 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:18,054 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:18,054 INFO  L87              Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states.
[2020-04-17 18:49:18,425 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:18,425 INFO  L93              Difference]: Finished difference Result 102 states and 237 transitions.
[2020-04-17 18:49:18,426 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-04-17 18:49:18,426 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:18,426 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:18,426 INFO  L225             Difference]: With dead ends: 102
[2020-04-17 18:49:18,427 INFO  L226             Difference]: Without dead ends: 96
[2020-04-17 18:49:18,427 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722
[2020-04-17 18:49:18,427 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 96 states.
[2020-04-17 18:49:18,428 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74.
[2020-04-17 18:49:18,428 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:49:18,429 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions.
[2020-04-17 18:49:18,429 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27
[2020-04-17 18:49:18,429 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:18,429 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 181 transitions.
[2020-04-17 18:49:18,429 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:18,429 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions.
[2020-04-17 18:49:18,430 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:18,430 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:18,430 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:18,630 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:18,631 INFO  L427      AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:18,631 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:18,631 INFO  L82        PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times
[2020-04-17 18:49:18,632 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:18,632 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721936253]
[2020-04-17 18:49:18,632 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:18,637 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:18,873 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:18,873 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721936253]
[2020-04-17 18:49:18,873 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610324827]
[2020-04-17 18:49:18,873 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:18,935 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s)
[2020-04-17 18:49:18,935 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:18,936 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:18,937 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:18,952 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:18,959 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:18,959 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:18,959 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:18,959 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122759913]
[2020-04-17 18:49:18,959 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:18,960 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:18,960 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:18,960 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:18,960 INFO  L87              Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states.
[2020-04-17 18:49:19,421 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:19,421 INFO  L93              Difference]: Finished difference Result 122 states and 277 transitions.
[2020-04-17 18:49:19,422 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-04-17 18:49:19,422 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:19,422 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:19,423 INFO  L225             Difference]: With dead ends: 122
[2020-04-17 18:49:19,423 INFO  L226             Difference]: Without dead ends: 116
[2020-04-17 18:49:19,423 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892
[2020-04-17 18:49:19,424 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 116 states.
[2020-04-17 18:49:19,425 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72.
[2020-04-17 18:49:19,425 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 72 states.
[2020-04-17 18:49:19,426 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions.
[2020-04-17 18:49:19,426 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27
[2020-04-17 18:49:19,426 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:19,426 INFO  L479      AbstractCegarLoop]: Abstraction has 72 states and 177 transitions.
[2020-04-17 18:49:19,426 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:19,426 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions.
[2020-04-17 18:49:19,426 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:19,427 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:19,427 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:19,630 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:19,630 INFO  L427      AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:19,630 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:19,630 INFO  L82        PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times
[2020-04-17 18:49:19,631 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:19,631 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911293352]
[2020-04-17 18:49:19,631 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:19,639 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:19,855 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:19,856 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911293352]
[2020-04-17 18:49:19,856 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767352042]
[2020-04-17 18:49:19,856 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:19,904 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:19,905 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:19,906 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:19,914 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:19,914 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:19,914 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:19,914 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988122044]
[2020-04-17 18:49:19,914 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:19,914 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:19,914 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:19,915 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:19,915 INFO  L87              Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states.
[2020-04-17 18:49:20,376 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:20,376 INFO  L93              Difference]: Finished difference Result 123 states and 281 transitions.
[2020-04-17 18:49:20,376 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. 
[2020-04-17 18:49:20,376 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:20,377 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:20,377 INFO  L225             Difference]: With dead ends: 123
[2020-04-17 18:49:20,377 INFO  L226             Difference]: Without dead ends: 117
[2020-04-17 18:49:20,377 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980
[2020-04-17 18:49:20,378 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 117 states.
[2020-04-17 18:49:20,379 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75.
[2020-04-17 18:49:20,379 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 75 states.
[2020-04-17 18:49:20,379 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions.
[2020-04-17 18:49:20,379 INFO  L78                 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27
[2020-04-17 18:49:20,379 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:20,379 INFO  L479      AbstractCegarLoop]: Abstraction has 75 states and 185 transitions.
[2020-04-17 18:49:20,380 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:20,380 INFO  L276                IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions.
[2020-04-17 18:49:20,380 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:20,380 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:20,380 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:20,580 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:20,581 INFO  L427      AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:20,581 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:20,581 INFO  L82        PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times
[2020-04-17 18:49:20,582 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:20,582 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289874979]
[2020-04-17 18:49:20,582 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:20,587 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:20,819 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:20,820 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289874979]
[2020-04-17 18:49:20,820 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208746064]
[2020-04-17 18:49:20,820 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:20,865 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:49:20,865 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:20,866 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:20,867 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:20,882 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:20,891 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:20,891 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:20,891 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:20,892 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467078296]
[2020-04-17 18:49:20,892 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:20,892 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:20,892 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:20,892 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:20,892 INFO  L87              Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states.
[2020-04-17 18:49:21,391 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:21,391 INFO  L93              Difference]: Finished difference Result 139 states and 313 transitions.
[2020-04-17 18:49:21,391 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. 
[2020-04-17 18:49:21,392 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:21,392 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:21,392 INFO  L225             Difference]: With dead ends: 139
[2020-04-17 18:49:21,392 INFO  L226             Difference]: Without dead ends: 133
[2020-04-17 18:49:21,393 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162
[2020-04-17 18:49:21,393 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 133 states.
[2020-04-17 18:49:21,395 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74.
[2020-04-17 18:49:21,395 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 74 states.
[2020-04-17 18:49:21,395 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions.
[2020-04-17 18:49:21,396 INFO  L78                 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27
[2020-04-17 18:49:21,396 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:21,396 INFO  L479      AbstractCegarLoop]: Abstraction has 74 states and 183 transitions.
[2020-04-17 18:49:21,396 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:21,396 INFO  L276                IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions.
[2020-04-17 18:49:21,396 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:21,396 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:21,397 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:21,600 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:21,600 INFO  L427      AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:21,600 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:21,601 INFO  L82        PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times
[2020-04-17 18:49:21,601 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:21,601 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691478439]
[2020-04-17 18:49:21,601 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:21,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:21,813 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:21,813 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691478439]
[2020-04-17 18:49:21,813 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095513125]
[2020-04-17 18:49:21,813 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:21,867 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s)
[2020-04-17 18:49:21,867 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:21,869 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:21,869 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:21,878 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:21,878 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:21,878 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:21,878 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981586071]
[2020-04-17 18:49:21,878 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:21,878 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:21,878 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:21,879 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:21,879 INFO  L87              Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states.
[2020-04-17 18:49:22,397 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:22,397 INFO  L93              Difference]: Finished difference Result 139 states and 315 transitions.
[2020-04-17 18:49:22,398 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-04-17 18:49:22,398 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:22,398 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:22,398 INFO  L225             Difference]: With dead ends: 139
[2020-04-17 18:49:22,398 INFO  L226             Difference]: Without dead ends: 133
[2020-04-17 18:49:22,399 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256
[2020-04-17 18:49:22,399 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 133 states.
[2020-04-17 18:49:22,400 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77.
[2020-04-17 18:49:22,401 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 77 states.
[2020-04-17 18:49:22,401 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions.
[2020-04-17 18:49:22,401 INFO  L78                 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27
[2020-04-17 18:49:22,401 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:22,401 INFO  L479      AbstractCegarLoop]: Abstraction has 77 states and 191 transitions.
[2020-04-17 18:49:22,401 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:22,402 INFO  L276                IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions.
[2020-04-17 18:49:22,402 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:22,402 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:22,402 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:22,602 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:22,603 INFO  L427      AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:22,603 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:22,603 INFO  L82        PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times
[2020-04-17 18:49:22,604 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:22,604 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867112273]
[2020-04-17 18:49:22,604 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:22,609 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:22,821 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:22,822 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867112273]
[2020-04-17 18:49:22,822 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669836937]
[2020-04-17 18:49:22,822 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:22,872 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:49:22,873 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:22,873 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:22,874 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:22,889 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:22,897 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:22,898 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:22,898 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:22,898 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270985444]
[2020-04-17 18:49:22,898 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:22,898 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:22,898 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:22,898 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:22,898 INFO  L87              Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states.
[2020-04-17 18:49:23,491 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:23,491 INFO  L93              Difference]: Finished difference Result 136 states and 309 transitions.
[2020-04-17 18:49:23,491 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-04-17 18:49:23,491 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:23,492 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:23,492 INFO  L225             Difference]: With dead ends: 136
[2020-04-17 18:49:23,492 INFO  L226             Difference]: Without dead ends: 130
[2020-04-17 18:49:23,492 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352
[2020-04-17 18:49:23,493 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 130 states.
[2020-04-17 18:49:23,494 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76.
[2020-04-17 18:49:23,494 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 76 states.
[2020-04-17 18:49:23,494 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions.
[2020-04-17 18:49:23,494 INFO  L78                 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27
[2020-04-17 18:49:23,495 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:23,495 INFO  L479      AbstractCegarLoop]: Abstraction has 76 states and 189 transitions.
[2020-04-17 18:49:23,495 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:23,495 INFO  L276                IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions.
[2020-04-17 18:49:23,495 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:23,495 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:23,495 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:23,696 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:23,696 INFO  L427      AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:23,697 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:23,697 INFO  L82        PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times
[2020-04-17 18:49:23,697 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:23,697 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212202464]
[2020-04-17 18:49:23,698 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:23,702 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:23,902 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:23,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212202464]
[2020-04-17 18:49:23,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130127991]
[2020-04-17 18:49:23,902 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:23,957 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s)
[2020-04-17 18:49:23,957 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:23,958 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:23,958 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:23,967 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:23,967 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:23,967 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:23,967 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989033437]
[2020-04-17 18:49:23,968 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:23,968 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:23,968 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:23,968 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:23,968 INFO  L87              Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states.
[2020-04-17 18:49:24,530 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:24,531 INFO  L93              Difference]: Finished difference Result 137 states and 313 transitions.
[2020-04-17 18:49:24,531 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-04-17 18:49:24,531 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:24,531 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:24,532 INFO  L225             Difference]: With dead ends: 137
[2020-04-17 18:49:24,532 INFO  L226             Difference]: Without dead ends: 131
[2020-04-17 18:49:24,533 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450
[2020-04-17 18:49:24,533 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 131 states.
[2020-04-17 18:49:24,534 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79.
[2020-04-17 18:49:24,534 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 79 states.
[2020-04-17 18:49:24,535 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions.
[2020-04-17 18:49:24,535 INFO  L78                 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27
[2020-04-17 18:49:24,535 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:24,535 INFO  L479      AbstractCegarLoop]: Abstraction has 79 states and 197 transitions.
[2020-04-17 18:49:24,535 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:24,535 INFO  L276                IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions.
[2020-04-17 18:49:24,535 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:24,535 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:24,535 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:24,736 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:24,736 INFO  L427      AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:24,736 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:24,737 INFO  L82        PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times
[2020-04-17 18:49:24,737 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:24,737 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215508052]
[2020-04-17 18:49:24,737 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:24,743 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:24,979 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:24,979 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215508052]
[2020-04-17 18:49:24,979 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115387330]
[2020-04-17 18:49:24,979 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:25,042 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s)
[2020-04-17 18:49:25,043 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:25,044 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:25,044 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:25,066 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:25,076 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:25,077 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:25,077 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:25,077 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540574723]
[2020-04-17 18:49:25,077 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:25,077 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:25,078 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:25,078 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:25,078 INFO  L87              Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states.
[2020-04-17 18:49:25,738 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:25,738 INFO  L93              Difference]: Finished difference Result 134 states and 307 transitions.
[2020-04-17 18:49:25,738 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-04-17 18:49:25,739 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:25,739 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:25,739 INFO  L225             Difference]: With dead ends: 134
[2020-04-17 18:49:25,739 INFO  L226             Difference]: Without dead ends: 128
[2020-04-17 18:49:25,740 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550
[2020-04-17 18:49:25,740 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 128 states.
[2020-04-17 18:49:25,742 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78.
[2020-04-17 18:49:25,742 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 78 states.
[2020-04-17 18:49:25,742 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions.
[2020-04-17 18:49:25,742 INFO  L78                 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27
[2020-04-17 18:49:25,742 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:25,743 INFO  L479      AbstractCegarLoop]: Abstraction has 78 states and 195 transitions.
[2020-04-17 18:49:25,743 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:25,743 INFO  L276                IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions.
[2020-04-17 18:49:25,743 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:25,743 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:25,743 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:25,946 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:25,947 INFO  L427      AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:25,947 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:25,947 INFO  L82        PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times
[2020-04-17 18:49:25,948 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:25,948 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116624913]
[2020-04-17 18:49:25,948 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:25,953 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:26,141 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:26,141 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116624913]
[2020-04-17 18:49:26,142 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258726245]
[2020-04-17 18:49:26,142 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:26,190 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:26,191 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:26,191 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:26,201 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:26,201 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:26,201 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:26,201 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850402943]
[2020-04-17 18:49:26,201 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:26,201 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:26,202 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:26,202 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:26,202 INFO  L87              Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states.
[2020-04-17 18:49:26,811 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:26,811 INFO  L93              Difference]: Finished difference Result 135 states and 311 transitions.
[2020-04-17 18:49:26,811 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. 
[2020-04-17 18:49:26,811 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:26,812 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:26,812 INFO  L225             Difference]: With dead ends: 135
[2020-04-17 18:49:26,812 INFO  L226             Difference]: Without dead ends: 129
[2020-04-17 18:49:26,812 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652
[2020-04-17 18:49:26,813 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 129 states.
[2020-04-17 18:49:26,814 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81.
[2020-04-17 18:49:26,814 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81 states.
[2020-04-17 18:49:26,814 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions.
[2020-04-17 18:49:26,814 INFO  L78                 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27
[2020-04-17 18:49:26,815 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:26,815 INFO  L479      AbstractCegarLoop]: Abstraction has 81 states and 203 transitions.
[2020-04-17 18:49:26,815 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:26,815 INFO  L276                IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions.
[2020-04-17 18:49:26,815 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:26,815 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:26,815 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:27,015 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:27,016 INFO  L427      AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:27,016 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:27,016 INFO  L82        PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times
[2020-04-17 18:49:27,017 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:27,017 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262298714]
[2020-04-17 18:49:27,017 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:27,023 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:27,217 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:27,218 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262298714]
[2020-04-17 18:49:27,218 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724260668]
[2020-04-17 18:49:27,218 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:27,266 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:49:27,266 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:27,267 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:27,267 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:27,283 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:27,293 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:27,294 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:27,294 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:27,294 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527558093]
[2020-04-17 18:49:27,294 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:27,294 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:27,294 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:27,294 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:27,294 INFO  L87              Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states.
[2020-04-17 18:49:28,009 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:28,009 INFO  L93              Difference]: Finished difference Result 132 states and 305 transitions.
[2020-04-17 18:49:28,009 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. 
[2020-04-17 18:49:28,009 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:28,010 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:28,010 INFO  L225             Difference]: With dead ends: 132
[2020-04-17 18:49:28,010 INFO  L226             Difference]: Without dead ends: 126
[2020-04-17 18:49:28,010 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756
[2020-04-17 18:49:28,011 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 126 states.
[2020-04-17 18:49:28,012 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80.
[2020-04-17 18:49:28,012 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 80 states.
[2020-04-17 18:49:28,013 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions.
[2020-04-17 18:49:28,013 INFO  L78                 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27
[2020-04-17 18:49:28,013 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:28,013 INFO  L479      AbstractCegarLoop]: Abstraction has 80 states and 201 transitions.
[2020-04-17 18:49:28,013 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:28,013 INFO  L276                IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions.
[2020-04-17 18:49:28,013 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:28,013 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:28,014 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:28,214 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:28,214 INFO  L427      AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:28,215 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:28,215 INFO  L82        PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times
[2020-04-17 18:49:28,215 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:28,215 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157589142]
[2020-04-17 18:49:28,216 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:28,220 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:28,408 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:28,408 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157589142]
[2020-04-17 18:49:28,409 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422306901]
[2020-04-17 18:49:28,409 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:28,465 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s)
[2020-04-17 18:49:28,465 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:28,466 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:28,467 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:28,478 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:28,478 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:28,478 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:28,478 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616265069]
[2020-04-17 18:49:28,479 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:28,479 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:28,479 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:28,479 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:28,479 INFO  L87              Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states.
[2020-04-17 18:49:29,126 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:29,126 INFO  L93              Difference]: Finished difference Result 133 states and 309 transitions.
[2020-04-17 18:49:29,126 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. 
[2020-04-17 18:49:29,126 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:29,127 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:29,127 INFO  L225             Difference]: With dead ends: 133
[2020-04-17 18:49:29,127 INFO  L226             Difference]: Without dead ends: 127
[2020-04-17 18:49:29,127 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862
[2020-04-17 18:49:29,128 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 127 states.
[2020-04-17 18:49:29,129 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83.
[2020-04-17 18:49:29,129 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 83 states.
[2020-04-17 18:49:29,130 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions.
[2020-04-17 18:49:29,130 INFO  L78                 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27
[2020-04-17 18:49:29,130 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:29,130 INFO  L479      AbstractCegarLoop]: Abstraction has 83 states and 209 transitions.
[2020-04-17 18:49:29,130 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:29,130 INFO  L276                IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions.
[2020-04-17 18:49:29,130 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:29,131 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:29,131 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:29,331 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:29,331 INFO  L427      AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:29,332 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:29,332 INFO  L82        PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times
[2020-04-17 18:49:29,332 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:29,332 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95469090]
[2020-04-17 18:49:29,333 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:29,338 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:29,526 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:29,526 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95469090]
[2020-04-17 18:49:29,526 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733003376]
[2020-04-17 18:49:29,526 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:29,576 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:49:29,577 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:29,577 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:29,578 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:29,595 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:29,613 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:29,614 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:29,614 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:29,614 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657853049]
[2020-04-17 18:49:29,614 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:29,615 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:29,615 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:29,615 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:29,615 INFO  L87              Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states.
[2020-04-17 18:49:30,409 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:30,409 INFO  L93              Difference]: Finished difference Result 130 states and 303 transitions.
[2020-04-17 18:49:30,409 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. 
[2020-04-17 18:49:30,409 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:30,410 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:30,410 INFO  L225             Difference]: With dead ends: 130
[2020-04-17 18:49:30,410 INFO  L226             Difference]: Without dead ends: 124
[2020-04-17 18:49:30,410 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970
[2020-04-17 18:49:30,411 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 124 states.
[2020-04-17 18:49:30,412 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82.
[2020-04-17 18:49:30,412 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 82 states.
[2020-04-17 18:49:30,413 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions.
[2020-04-17 18:49:30,413 INFO  L78                 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27
[2020-04-17 18:49:30,413 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:30,413 INFO  L479      AbstractCegarLoop]: Abstraction has 82 states and 207 transitions.
[2020-04-17 18:49:30,413 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:30,413 INFO  L276                IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions.
[2020-04-17 18:49:30,413 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:30,414 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:30,414 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:30,614 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:30,614 INFO  L427      AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:30,615 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:30,615 INFO  L82        PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times
[2020-04-17 18:49:30,615 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:30,616 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462778737]
[2020-04-17 18:49:30,616 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:30,621 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:30,806 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:30,807 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462778737]
[2020-04-17 18:49:30,807 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072850398]
[2020-04-17 18:49:30,807 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:30,863 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s)
[2020-04-17 18:49:30,863 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:30,864 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:30,864 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:30,875 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:30,876 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:30,876 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:30,876 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391706879]
[2020-04-17 18:49:30,876 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:30,876 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:30,876 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:30,876 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:30,876 INFO  L87              Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states.
[2020-04-17 18:49:31,568 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:31,568 INFO  L93              Difference]: Finished difference Result 131 states and 307 transitions.
[2020-04-17 18:49:31,568 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. 
[2020-04-17 18:49:31,568 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:31,569 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:31,569 INFO  L225             Difference]: With dead ends: 131
[2020-04-17 18:49:31,569 INFO  L226             Difference]: Without dead ends: 125
[2020-04-17 18:49:31,569 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080
[2020-04-17 18:49:31,570 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 125 states.
[2020-04-17 18:49:31,572 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85.
[2020-04-17 18:49:31,572 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 85 states.
[2020-04-17 18:49:31,572 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions.
[2020-04-17 18:49:31,572 INFO  L78                 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27
[2020-04-17 18:49:31,572 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:31,572 INFO  L479      AbstractCegarLoop]: Abstraction has 85 states and 215 transitions.
[2020-04-17 18:49:31,573 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:31,573 INFO  L276                IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions.
[2020-04-17 18:49:31,573 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:31,573 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:31,573 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:31,776 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:31,776 INFO  L427      AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:31,777 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:31,777 INFO  L82        PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times
[2020-04-17 18:49:31,777 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:31,777 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738219106]
[2020-04-17 18:49:31,778 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:31,783 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:31,968 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:31,969 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738219106]
[2020-04-17 18:49:31,969 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919381710]
[2020-04-17 18:49:31,969 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:32,022 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s)
[2020-04-17 18:49:32,022 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:32,023 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:32,023 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:32,046 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:32,056 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:32,056 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:32,056 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:32,057 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135699886]
[2020-04-17 18:49:32,057 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:32,057 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:32,057 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:32,057 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:32,057 INFO  L87              Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states.
[2020-04-17 18:49:32,904 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:32,905 INFO  L93              Difference]: Finished difference Result 128 states and 301 transitions.
[2020-04-17 18:49:32,905 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. 
[2020-04-17 18:49:32,905 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:32,905 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:32,906 INFO  L225             Difference]: With dead ends: 128
[2020-04-17 18:49:32,906 INFO  L226             Difference]: Without dead ends: 122
[2020-04-17 18:49:32,906 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192
[2020-04-17 18:49:32,907 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 122 states.
[2020-04-17 18:49:32,908 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84.
[2020-04-17 18:49:32,908 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 84 states.
[2020-04-17 18:49:32,908 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions.
[2020-04-17 18:49:32,909 INFO  L78                 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27
[2020-04-17 18:49:32,909 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:32,909 INFO  L479      AbstractCegarLoop]: Abstraction has 84 states and 213 transitions.
[2020-04-17 18:49:32,909 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:32,909 INFO  L276                IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions.
[2020-04-17 18:49:32,909 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:32,909 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:32,909 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:33,109 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:33,110 INFO  L427      AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:33,110 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:33,110 INFO  L82        PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times
[2020-04-17 18:49:33,111 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:33,111 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532556909]
[2020-04-17 18:49:33,111 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:33,120 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:33,299 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:33,299 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532556909]
[2020-04-17 18:49:33,300 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254372815]
[2020-04-17 18:49:33,300 INFO  L92    rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:33,347 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:33,348 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:33,349 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:33,360 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:33,361 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:33,361 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:33,361 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677507883]
[2020-04-17 18:49:33,361 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:33,361 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:33,361 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:33,361 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:33,362 INFO  L87              Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states.
[2020-04-17 18:49:34,088 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:34,088 INFO  L93              Difference]: Finished difference Result 129 states and 305 transitions.
[2020-04-17 18:49:34,089 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. 
[2020-04-17 18:49:34,089 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:34,089 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:34,089 INFO  L225             Difference]: With dead ends: 129
[2020-04-17 18:49:34,089 INFO  L226             Difference]: Without dead ends: 123
[2020-04-17 18:49:34,090 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306
[2020-04-17 18:49:34,090 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 123 states.
[2020-04-17 18:49:34,092 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87.
[2020-04-17 18:49:34,092 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 87 states.
[2020-04-17 18:49:34,092 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions.
[2020-04-17 18:49:34,092 INFO  L78                 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27
[2020-04-17 18:49:34,092 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:34,092 INFO  L479      AbstractCegarLoop]: Abstraction has 87 states and 221 transitions.
[2020-04-17 18:49:34,093 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:34,093 INFO  L276                IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions.
[2020-04-17 18:49:34,093 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:34,093 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:34,093 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:34,293 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:34,294 INFO  L427      AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:34,294 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:34,294 INFO  L82        PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times
[2020-04-17 18:49:34,295 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:34,295 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046632286]
[2020-04-17 18:49:34,295 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:34,300 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:34,470 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:34,470 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046632286]
[2020-04-17 18:49:34,470 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789966478]
[2020-04-17 18:49:34,470 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:34,527 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-04-17 18:49:34,527 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:34,528 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:34,529 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:34,546 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:34,557 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:34,557 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:34,557 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:34,557 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084544141]
[2020-04-17 18:49:34,557 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:34,557 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:34,558 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:34,558 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:34,558 INFO  L87              Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states.
[2020-04-17 18:49:35,471 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:35,471 INFO  L93              Difference]: Finished difference Result 126 states and 299 transitions.
[2020-04-17 18:49:35,472 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. 
[2020-04-17 18:49:35,472 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:35,472 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:35,472 INFO  L225             Difference]: With dead ends: 126
[2020-04-17 18:49:35,472 INFO  L226             Difference]: Without dead ends: 120
[2020-04-17 18:49:35,473 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422
[2020-04-17 18:49:35,473 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 120 states.
[2020-04-17 18:49:35,474 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86.
[2020-04-17 18:49:35,475 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 86 states.
[2020-04-17 18:49:35,475 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions.
[2020-04-17 18:49:35,475 INFO  L78                 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27
[2020-04-17 18:49:35,475 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:35,475 INFO  L479      AbstractCegarLoop]: Abstraction has 86 states and 219 transitions.
[2020-04-17 18:49:35,475 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:35,476 INFO  L276                IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions.
[2020-04-17 18:49:35,476 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:35,476 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:35,476 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:35,677 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:35,677 INFO  L427      AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:35,677 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:35,677 INFO  L82        PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times
[2020-04-17 18:49:35,677 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:35,677 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157571128]
[2020-04-17 18:49:35,677 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:35,683 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:35,854 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:35,854 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157571128]
[2020-04-17 18:49:35,854 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800134508]
[2020-04-17 18:49:35,854 INFO  L92    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:35,909 INFO  L249   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s)
[2020-04-17 18:49:35,909 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:35,910 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core
[2020-04-17 18:49:35,910 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:35,924 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:35,924 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:35,924 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:35,924 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235124090]
[2020-04-17 18:49:35,924 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:35,924 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:35,924 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:35,925 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:35,925 INFO  L87              Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states.
[2020-04-17 18:49:36,698 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:36,699 INFO  L93              Difference]: Finished difference Result 127 states and 303 transitions.
[2020-04-17 18:49:36,699 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. 
[2020-04-17 18:49:36,699 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:36,699 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:36,700 INFO  L225             Difference]: With dead ends: 127
[2020-04-17 18:49:36,700 INFO  L226             Difference]: Without dead ends: 121
[2020-04-17 18:49:36,700 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540
[2020-04-17 18:49:36,701 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 121 states.
[2020-04-17 18:49:36,702 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89.
[2020-04-17 18:49:36,702 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 89 states.
[2020-04-17 18:49:36,703 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions.
[2020-04-17 18:49:36,703 INFO  L78                 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27
[2020-04-17 18:49:36,703 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:36,703 INFO  L479      AbstractCegarLoop]: Abstraction has 89 states and 227 transitions.
[2020-04-17 18:49:36,703 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:36,703 INFO  L276                IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions.
[2020-04-17 18:49:36,704 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:36,704 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:36,704 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:36,906 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:36,907 INFO  L427      AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:36,907 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:36,908 INFO  L82        PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times
[2020-04-17 18:49:36,908 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:36,908 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765426839]
[2020-04-17 18:49:36,908 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:36,913 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:37,078 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:37,079 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765426839]
[2020-04-17 18:49:37,079 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482296853]
[2020-04-17 18:49:37,079 INFO  L92    rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:37,129 INFO  L249   tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s)
[2020-04-17 18:49:37,130 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:37,130 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:37,131 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:37,147 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2020-04-17 18:49:37,159 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:37,159 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:37,159 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:37,159 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166573631]
[2020-04-17 18:49:37,159 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:37,159 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:37,160 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:37,160 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:37,160 INFO  L87              Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states.
[2020-04-17 18:49:38,155 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:38,156 INFO  L93              Difference]: Finished difference Result 124 states and 297 transitions.
[2020-04-17 18:49:38,156 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. 
[2020-04-17 18:49:38,156 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:38,156 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:38,157 INFO  L225             Difference]: With dead ends: 124
[2020-04-17 18:49:38,157 INFO  L226             Difference]: Without dead ends: 118
[2020-04-17 18:49:38,157 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660
[2020-04-17 18:49:38,158 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 118 states.
[2020-04-17 18:49:38,159 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88.
[2020-04-17 18:49:38,159 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 88 states.
[2020-04-17 18:49:38,159 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions.
[2020-04-17 18:49:38,160 INFO  L78                 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27
[2020-04-17 18:49:38,160 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:38,160 INFO  L479      AbstractCegarLoop]: Abstraction has 88 states and 225 transitions.
[2020-04-17 18:49:38,160 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:38,160 INFO  L276                IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions.
[2020-04-17 18:49:38,160 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:38,160 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:38,160 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:38,361 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:38,361 INFO  L427      AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:38,361 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:38,362 INFO  L82        PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times
[2020-04-17 18:49:38,362 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:38,362 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236446163]
[2020-04-17 18:49:38,362 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:38,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:38,535 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:38,535 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236446163]
[2020-04-17 18:49:38,535 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838035455]
[2020-04-17 18:49:38,535 INFO  L92    rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:38,588 INFO  L249   tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s)
[2020-04-17 18:49:38,589 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:38,590 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-04-17 18:49:38,590 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:38,604 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:38,605 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:38,605 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21
[2020-04-17 18:49:38,605 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37802433]
[2020-04-17 18:49:38,605 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-04-17 18:49:38,605 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:38,605 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-04-17 18:49:38,606 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506
[2020-04-17 18:49:38,606 INFO  L87              Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states.
[2020-04-17 18:49:39,413 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:39,413 INFO  L93              Difference]: Finished difference Result 144 states and 347 transitions.
[2020-04-17 18:49:39,414 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. 
[2020-04-17 18:49:39,414 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 27
[2020-04-17 18:49:39,414 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:39,414 INFO  L225             Difference]: With dead ends: 144
[2020-04-17 18:49:39,414 INFO  L226             Difference]: Without dead ends: 138
[2020-04-17 18:49:39,415 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782
[2020-04-17 18:49:39,415 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 138 states.
[2020-04-17 18:49:39,417 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94.
[2020-04-17 18:49:39,417 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 94 states.
[2020-04-17 18:49:39,418 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions.
[2020-04-17 18:49:39,418 INFO  L78                 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27
[2020-04-17 18:49:39,418 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:39,418 INFO  L479      AbstractCegarLoop]: Abstraction has 94 states and 245 transitions.
[2020-04-17 18:49:39,418 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-04-17 18:49:39,418 INFO  L276                IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions.
[2020-04-17 18:49:39,418 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-04-17 18:49:39,418 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:39,418 INFO  L425         BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:39,619 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:39,619 INFO  L427      AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:39,619 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:39,620 INFO  L82        PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times
[2020-04-17 18:49:39,620 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:39,620 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450913833]
[2020-04-17 18:49:39,620 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:39,625 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-04-17 18:49:39,791 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:39,791 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450913833]
[2020-04-17 18:49:39,791 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094933202]
[2020-04-17 18:49:39,792 INFO  L92    rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:39,843 INFO  L249   tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s)
[2020-04-17 18:49:39,844 INFO  L250   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-04-17 18:49:39,845 INFO  L264         TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core
[2020-04-17 18:49:39,846 INFO  L287         TraceCheckSpWp]: Computing forward predicates...
[2020-04-17 18:49:39,876 INFO  L134       CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-04-17 18:49:39,876 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-04-17 18:49:39,877 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22
[2020-04-17 18:49:39,877 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135356629]
[2020-04-17 18:49:39,877 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 24 states
[2020-04-17 18:49:39,877 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-04-17 18:49:39,877 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants.
[2020-04-17 18:49:39,877 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552
[2020-04-17 18:49:39,877 INFO  L87              Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states.
[2020-04-17 18:49:40,837 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-04-17 18:49:40,838 INFO  L93              Difference]: Finished difference Result 125 states and 303 transitions.
[2020-04-17 18:49:40,838 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. 
[2020-04-17 18:49:40,838 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states. Word has length 27
[2020-04-17 18:49:40,838 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-04-17 18:49:40,839 INFO  L225             Difference]: With dead ends: 125
[2020-04-17 18:49:40,839 INFO  L226             Difference]: Without dead ends: 117
[2020-04-17 18:49:40,839 INFO  L678         BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906
[2020-04-17 18:49:40,840 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 117 states.
[2020-04-17 18:49:40,841 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91.
[2020-04-17 18:49:40,841 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 91 states.
[2020-04-17 18:49:40,841 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions.
[2020-04-17 18:49:40,841 INFO  L78                 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27
[2020-04-17 18:49:40,841 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-04-17 18:49:40,841 INFO  L479      AbstractCegarLoop]: Abstraction has 91 states and 233 transitions.
[2020-04-17 18:49:40,841 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 24 states.
[2020-04-17 18:49:40,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions.
[2020-04-17 18:49:40,842 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-04-17 18:49:40,842 INFO  L417         BasicCegarLoop]: Found error trace
[2020-04-17 18:49:40,842 INFO  L425         BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-04-17 18:49:41,042 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-04-17 18:49:41,042 INFO  L427      AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-04-17 18:49:41,043 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-04-17 18:49:41,043 INFO  L82        PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times
[2020-04-17 18:49:41,043 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-04-17 18:49:41,044 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467141011]
[2020-04-17 18:49:41,044 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-04-17 18:49:41,050 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-04-17 18:49:41,058 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-04-17 18:49:41,086 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2020-04-17 18:49:41,086 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2020-04-17 18:49:41,155 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.04 06:49:41 BasicIcfg
[2020-04-17 18:49:41,156 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-04-17 18:49:41,157 INFO  L168              Benchmark]: Toolchain (without parser) took 192258.78 ms. Allocated memory was 140.0 MB in the beginning and 250.6 MB in the end (delta: 110.6 MB). Free memory was 102.3 MB in the beginning and 183.5 MB in the end (delta: -81.1 MB). Peak memory consumption was 29.5 MB. Max. memory is 7.1 GB.
[2020-04-17 18:49:41,158 INFO  L168              Benchmark]: CDTParser took 0.42 ms. Allocated memory is still 140.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB.
[2020-04-17 18:49:41,158 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 679.61 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 100.4 MB in the beginning and 163.6 MB in the end (delta: -63.2 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB.
[2020-04-17 18:49:41,159 INFO  L168              Benchmark]: Boogie Procedure Inliner took 43.54 ms. Allocated memory is still 203.9 MB. Free memory was 163.0 MB in the beginning and 161.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB.
[2020-04-17 18:49:41,159 INFO  L168              Benchmark]: Boogie Preprocessor took 27.62 ms. Allocated memory is still 203.9 MB. Free memory was 161.0 MB in the beginning and 159.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB.
[2020-04-17 18:49:41,159 INFO  L168              Benchmark]: RCFGBuilder took 387.93 ms. Allocated memory is still 203.9 MB. Free memory was 159.7 MB in the beginning and 139.5 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB.
[2020-04-17 18:49:41,160 INFO  L168              Benchmark]: TraceAbstraction took 191094.54 ms. Allocated memory was 203.9 MB in the beginning and 250.6 MB in the end (delta: 46.7 MB). Free memory was 139.5 MB in the beginning and 183.5 MB in the end (delta: -43.9 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB.
[2020-04-17 18:49:41,162 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.42 ms. Allocated memory is still 140.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 679.61 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 100.4 MB in the beginning and 163.6 MB in the end (delta: -63.2 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB.
 * Boogie Procedure Inliner took 43.54 ms. Allocated memory is still 203.9 MB. Free memory was 163.0 MB in the beginning and 161.0 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 27.62 ms. Allocated memory is still 203.9 MB. Free memory was 161.0 MB in the beginning and 159.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 387.93 ms. Allocated memory is still 203.9 MB. Free memory was 159.7 MB in the beginning and 139.5 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 191094.54 ms. Allocated memory was 203.9 MB in the beginning and 250.6 MB in the end (delta: 46.7 MB). Free memory was 139.5 MB in the beginning and 183.5 MB in the end (delta: -43.9 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - StatisticsResult: PetriNetLargeBlockEncoding benchmarks
    LbeTime: 1.4s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions
  - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L675]               0  int i = 3, j = 6;
[L693]               0  pthread_t id1, id2;
[L694]  FCALL, FORK  0  pthread_create(&id1, ((void *)0), t1, ((void *)0))
        VAL             [arg={0:0}, i=3, j=6]
[L677]               1  int k = 0;
        VAL             [arg={0:0}, arg={0:0}, i=3, j=6, k=0]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, i=7, j=6, k=1]
[L695]  FCALL, FORK  0  pthread_create(&id2, ((void *)0), t2, ((void *)0))
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1]
[L685]               2  int k = 0;
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0]
[L697]               0  int condI = i >= (2*10 +6);
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=6]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9]
[L677]  COND TRUE    1  k < 10
[L679]               1  i = j + 1
[L677]               1  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9]
[L685]  COND TRUE    2  k < 10
[L687]               2  j = i + 1
[L685]               2  k++
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10]
[L700]               0  int condJ = j >= (2*10 +6);
[L702]  COND TRUE    0  condI || condJ
[L703]               0  __VERIFIER_error()
        VAL             [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 190.9s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 99.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.4s, HoareTripleCheckerStatistics: 3460 SDtfs, 12481 SDslu, 21815 SDs, 0 SdLazy, 24291 SolverSat, 13840 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11868 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7741 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75461 ImplicationChecksByTransitivity, 98.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 218 MinimizatonAttempts, 5497 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 33.0s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2763 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3653 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...