/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 21:13:49,102 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 21:13:49,105 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 21:13:49,125 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 21:13:49,126 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 21:13:49,128 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 21:13:49,131 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 21:13:49,143 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2020-07-20 21:13:49,150 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 21:13:49,151 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 21:13:49,154 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 21:13:49,154 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 21:13:49,155 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 21:13:49,156 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 21:13:49,160 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 21:13:49,163 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 21:13:49,165 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 21:13:49,167 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 21:13:49,173 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 21:13:49,180 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 21:13:49,184 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 21:13:49,186 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 21:13:49,187 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 21:13:49,190 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 21:13:49,190 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 21:13:49,190 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 21:13:49,193 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 21:13:49,194 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 21:13:49,196 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 21:13:49,197 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 21:13:49,199 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
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[2020-07-20 21:13:49,203 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 21:13:49,203 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 21:13:49,203 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-07-20 21:13:49,204 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 21:13:49,207 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 21:13:49,208 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 21:13:49,241 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 21:13:49,245 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 21:13:49,246 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 21:13:49,247 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 21:13:49,247 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 21:13:49,247 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 21:13:49,247 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 21:13:49,247 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 21:13:49,248 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 21:13:49,248 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 21:13:49,248 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 21:13:49,248 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 21:13:49,248 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 21:13:49,249 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 21:13:49,249 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 21:13:49,249 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 21:13:49,249 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 21:13:49,250 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 21:13:49,250 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 21:13:49,250 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 21:13:49,250 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 21:13:49,250 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 21:13:49,251 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 21:13:49,251 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 21:13:49,251 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 21:13:49,251 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 21:13:49,252 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:13:49,252 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 21:13:49,252 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 21:13:49,252 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 21:13:49,613 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 21:13:49,641 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 21:13:49,646 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 21:13:49,648 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 21:13:49,648 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 21:13:49,649 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c
[2020-07-20 21:13:49,758 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e8d196c/84b2e50d5a23438188eb14300a2c2cee/FLAGf7beb55ed
[2020-07-20 21:13:50,362 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 21:13:50,363 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi03-2.c
[2020-07-20 21:13:50,371 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e8d196c/84b2e50d5a23438188eb14300a2c2cee/FLAGf7beb55ed
[2020-07-20 21:13:50,701 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e8d196c/84b2e50d5a23438188eb14300a2c2cee
[2020-07-20 21:13:50,712 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 21:13:50,715 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 21:13:50,717 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 21:13:50,717 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 21:13:50,722 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 21:13:50,723 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,727 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba21af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50, skipping insertion in model container
[2020-07-20 21:13:50,728 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,737 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 21:13:50,760 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 21:13:50,934 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:13:50,940 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 21:13:50,955 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:13:50,971 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 21:13:50,972 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50 WrapperNode
[2020-07-20 21:13:50,972 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 21:13:50,973 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 21:13:50,974 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 21:13:50,974 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 21:13:50,985 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,986 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,992 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,992 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,997 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,999 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:51,001 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:51,002 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 21:13:51,003 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 21:13:51,003 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 21:13:51,003 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 21:13:51,005 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 21:13:51,173 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 21:13:51,174 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 21:13:51,174 INFO  L138     BoogieDeclarations]: Found implementation of procedure hanoi
[2020-07-20 21:13:51,174 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 21:13:51,174 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 21:13:51,175 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 21:13:51,175 INFO  L130     BoogieDeclarations]: Found specification of procedure hanoi
[2020-07-20 21:13:51,176 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 21:13:51,176 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 21:13:51,176 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 21:13:51,376 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 21:13:51,376 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 21:13:51,381 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:51 BoogieIcfgContainer
[2020-07-20 21:13:51,381 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 21:13:51,383 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 21:13:51,383 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 21:13:51,386 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 21:13:51,387 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:13:50" (1/3) ...
[2020-07-20 21:13:51,388 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d7e9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:51, skipping insertion in model container
[2020-07-20 21:13:51,388 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (2/3) ...
[2020-07-20 21:13:51,389 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d7e9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:51, skipping insertion in model container
[2020-07-20 21:13:51,389 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:51" (3/3) ...
[2020-07-20 21:13:51,391 INFO  L109   eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c
[2020-07-20 21:13:51,405 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 21:13:51,415 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 21:13:51,436 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 21:13:51,464 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 21:13:51,464 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 21:13:51,464 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 21:13:51,464 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 21:13:51,465 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 21:13:51,465 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 21:13:51,465 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 21:13:51,465 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 21:13:51,485 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states.
[2020-07-20 21:13:51,492 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-20 21:13:51,493 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:13:51,494 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:13:51,495 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:13:51,500 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:13:51,501 INFO  L82        PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times
[2020-07-20 21:13:51,509 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:13:51,510 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232753291]
[2020-07-20 21:13:51,511 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:13:51,601 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:13:51,602 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:13:51,609 INFO  L263         TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 21:13:51,623 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:13:51,843 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 21:13:51,844 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:13:51,845 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232753291]
[2020-07-20 21:13:51,846 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:13:51,846 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-20 21:13:51,848 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195593202]
[2020-07-20 21:13:51,854 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 21:13:51,855 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:13:51,867 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 21:13:51,868 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-07-20 21:13:51,870 INFO  L87              Difference]: Start difference. First operand 21 states. Second operand 6 states.
[2020-07-20 21:13:52,039 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:13:52,039 INFO  L93              Difference]: Finished difference Result 33 states and 37 transitions.
[2020-07-20 21:13:52,040 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-07-20 21:13:52,042 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 14
[2020-07-20 21:13:52,043 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:13:52,056 INFO  L225             Difference]: With dead ends: 33
[2020-07-20 21:13:52,056 INFO  L226             Difference]: Without dead ends: 19
[2020-07-20 21:13:52,061 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-07-20 21:13:52,085 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2020-07-20 21:13:52,114 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2020-07-20 21:13:52,116 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2020-07-20 21:13:52,117 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions.
[2020-07-20 21:13:52,121 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14
[2020-07-20 21:13:52,121 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:13:52,122 INFO  L479      AbstractCegarLoop]: Abstraction has 19 states and 20 transitions.
[2020-07-20 21:13:52,122 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 21:13:52,122 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions.
[2020-07-20 21:13:52,124 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-20 21:13:52,125 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:13:52,125 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:13:52,340 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:13:52,342 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:13:52,342 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:13:52,343 INFO  L82        PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times
[2020-07-20 21:13:52,343 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:13:52,344 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323697399]
[2020-07-20 21:13:52,344 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:13:52,385 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:13:52,386 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:13:52,387 INFO  L263         TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-07-20 21:13:52,390 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:13:52,593 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-20 21:13:52,594 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:13:52,999 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:13:53,009 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:14:19,135 WARN  L193               SmtUtils]: Spent 9.60 s on a formula simplification that was a NOOP. DAG size: 19
[2020-07-20 21:14:30,721 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:14:32,474 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 21:14:32,475 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323697399]
[2020-07-20 21:14:32,475 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 21:14:32,476 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15
[2020-07-20 21:14:32,476 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385521794]
[2020-07-20 21:14:32,478 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 21:14:32,478 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:14:32,479 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 21:14:32,479 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=161, Unknown=10, NotChecked=0, Total=210
[2020-07-20 21:14:32,480 INFO  L87              Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states.
[2020-07-20 21:14:39,717 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:14:39,717 INFO  L93              Difference]: Finished difference Result 31 states and 33 transitions.
[2020-07-20 21:14:39,720 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-07-20 21:14:39,720 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 20
[2020-07-20 21:14:39,721 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:14:39,722 INFO  L225             Difference]: With dead ends: 31
[2020-07-20 21:14:39,722 INFO  L226             Difference]: Without dead ends: 25
[2020-07-20 21:14:39,724 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=76, Invalid=291, Unknown=13, NotChecked=0, Total=380
[2020-07-20 21:14:39,725 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2020-07-20 21:14:39,731 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2020-07-20 21:14:39,731 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2020-07-20 21:14:39,732 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions.
[2020-07-20 21:14:39,732 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20
[2020-07-20 21:14:39,733 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:14:39,733 INFO  L479      AbstractCegarLoop]: Abstraction has 25 states and 26 transitions.
[2020-07-20 21:14:39,733 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 21:14:39,733 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions.
[2020-07-20 21:14:39,735 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2020-07-20 21:14:39,735 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:14:39,735 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:14:39,949 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:14:39,950 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:14:39,950 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:14:39,951 INFO  L82        PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 2 times
[2020-07-20 21:14:39,952 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:14:39,952 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463453672]
[2020-07-20 21:14:39,953 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:14:39,989 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:14:39,990 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:14:39,991 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-07-20 21:14:39,994 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:14:50,939 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-20 21:14:50,940 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:14:51,817 WARN  L193               SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:14:51,934 WARN  L193               SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:14:52,057 WARN  L193               SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46
[2020-07-20 21:14:53,147 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463453672]
[2020-07-20 21:14:53,147 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-20 21:14:53,148 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-07-20 21:14:53,148 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677223956]
[2020-07-20 21:14:53,149 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 21:14:53,149 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:14:53,149 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 21:14:53,150 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=219, Unknown=5, NotChecked=0, Total=272
[2020-07-20 21:14:53,150 INFO  L87              Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states.
[2020-07-20 21:15:04,688 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:15:04,688 INFO  L93              Difference]: Finished difference Result 32 states and 33 transitions.
[2020-07-20 21:15:04,692 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-07-20 21:15:04,693 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 32
[2020-07-20 21:15:04,694 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:15:04,695 INFO  L225             Difference]: With dead ends: 32
[2020-07-20 21:15:04,695 INFO  L226             Difference]: Without dead ends: 28
[2020-07-20 21:15:04,697 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=90, Invalid=457, Unknown=5, NotChecked=0, Total=552
[2020-07-20 21:15:04,697 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-07-20 21:15:04,703 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2020-07-20 21:15:04,703 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-07-20 21:15:04,705 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions.
[2020-07-20 21:15:04,705 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32
[2020-07-20 21:15:04,705 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:15:04,705 INFO  L479      AbstractCegarLoop]: Abstraction has 28 states and 29 transitions.
[2020-07-20 21:15:04,705 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 21:15:04,706 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions.
[2020-07-20 21:15:04,707 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2020-07-20 21:15:04,707 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:15:04,707 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:15:04,911 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:15:04,912 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:15:04,912 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:15:04,912 INFO  L82        PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 3 times
[2020-07-20 21:15:04,913 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:15:04,913 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362256139]
[2020-07-20 21:15:04,914 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:15:04,960 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:15:04,960 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:15:04,962 INFO  L263         TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-07-20 21:15:04,966 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:15:33,473 INFO  L134       CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2020-07-20 21:15:33,473 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:15:34,510 WARN  L193               SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:15:34,634 WARN  L193               SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:15:34,760 WARN  L193               SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:15:34,886 WARN  L193               SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:15:35,033 WARN  L193               SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:15:35,173 WARN  L193               SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:15:35,369 WARN  L193               SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 57
[2020-07-20 21:15:35,530 WARN  L193               SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 57
[2020-07-20 21:15:36,601 WARN  L193               SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:15:36,710 WARN  L193               SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:15:36,840 WARN  L193               SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:15:36,972 WARN  L193               SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:15:37,169 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362256139]
[2020-07-20 21:15:37,169 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-20 21:15:37,170 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-07-20 21:15:37,170 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432776223]
[2020-07-20 21:15:37,170 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-07-20 21:15:37,170 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:15:37,171 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-07-20 21:15:37,171 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=273, Unknown=13, NotChecked=0, Total=342
[2020-07-20 21:15:37,171 INFO  L87              Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states.
[2020-07-20 21:16:22,208 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:16:22,209 INFO  L93              Difference]: Finished difference Result 35 states and 36 transitions.
[2020-07-20 21:16:22,218 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. 
[2020-07-20 21:16:22,218 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 38
[2020-07-20 21:16:22,219 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:16:22,220 INFO  L225             Difference]: With dead ends: 35
[2020-07-20 21:16:22,220 INFO  L226             Difference]: Without dead ends: 31
[2020-07-20 21:16:22,222 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=110, Invalid=627, Unknown=19, NotChecked=0, Total=756
[2020-07-20 21:16:22,222 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2020-07-20 21:16:22,227 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2020-07-20 21:16:22,228 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2020-07-20 21:16:22,229 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions.
[2020-07-20 21:16:22,229 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38
[2020-07-20 21:16:22,230 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:16:22,230 INFO  L479      AbstractCegarLoop]: Abstraction has 31 states and 32 transitions.
[2020-07-20 21:16:22,230 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-07-20 21:16:22,230 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions.
[2020-07-20 21:16:22,232 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-20 21:16:22,232 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:16:22,232 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:16:22,446 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:16:22,447 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:16:22,448 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:16:22,448 INFO  L82        PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 4 times
[2020-07-20 21:16:22,448 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:16:22,448 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078210227]
[2020-07-20 21:16:22,449 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:16:22,509 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:16:22,510 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:16:22,512 INFO  L263         TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core
[2020-07-20 21:16:22,515 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:17:25,382 INFO  L134       CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2020-07-20 21:17:25,383 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:17:26,411 WARN  L193               SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:17:26,521 WARN  L193               SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:17:26,666 WARN  L193               SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:26,805 WARN  L193               SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:26,964 WARN  L193               SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:17:27,122 WARN  L193               SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:17:27,308 WARN  L193               SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:17:27,484 WARN  L193               SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:17:27,692 WARN  L193               SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:17:27,897 WARN  L193               SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:17:28,120 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:17:28,347 WARN  L193               SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:17:28,611 WARN  L193               SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:17:28,860 WARN  L193               SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:17:29,131 WARN  L193               SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 68
[2020-07-20 21:17:29,400 WARN  L193               SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 68
[2020-07-20 21:17:30,485 WARN  L193               SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:17:30,607 WARN  L193               SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:17:30,739 WARN  L193               SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:30,883 WARN  L193               SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:31,044 WARN  L193               SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:17:31,203 WARN  L193               SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:17:31,387 WARN  L193               SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:17:31,570 WARN  L193               SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:17:31,782 WARN  L193               SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:17:31,982 WARN  L193               SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:17:32,268 WARN  L193               SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:17:32,499 WARN  L193               SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:17:32,655 WARN  L193               SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 46
[2020-07-20 21:17:32,776 WARN  L193               SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:33,032 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078210227]
[2020-07-20 21:17:33,032 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-20 21:17:33,033 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-07-20 21:17:33,033 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317084694]
[2020-07-20 21:17:33,034 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-07-20 21:17:33,034 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:17:33,034 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-07-20 21:17:33,035 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=328, Unknown=28, NotChecked=0, Total=420
[2020-07-20 21:17:33,035 INFO  L87              Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states.
[2020-07-20 21:19:58,994 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:19:58,995 INFO  L93              Difference]: Finished difference Result 38 states and 39 transitions.
[2020-07-20 21:19:59,010 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-07-20 21:19:59,010 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 44
[2020-07-20 21:19:59,011 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:19:59,012 INFO  L225             Difference]: With dead ends: 38
[2020-07-20 21:19:59,012 INFO  L226             Difference]: Without dead ends: 34
[2020-07-20 21:19:59,014 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 149.4s TimeCoverageRelationStatistics Valid=130, Invalid=809, Unknown=53, NotChecked=0, Total=992
[2020-07-20 21:19:59,015 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-07-20 21:19:59,021 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34.
[2020-07-20 21:19:59,021 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-07-20 21:19:59,023 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions.
[2020-07-20 21:19:59,023 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44
[2020-07-20 21:19:59,023 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:19:59,023 INFO  L479      AbstractCegarLoop]: Abstraction has 34 states and 35 transitions.
[2020-07-20 21:19:59,024 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-07-20 21:19:59,024 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions.
[2020-07-20 21:19:59,025 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2020-07-20 21:19:59,026 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:19:59,026 INFO  L422         BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:19:59,229 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:19:59,231 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:19:59,231 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:19:59,231 INFO  L82        PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 5 times
[2020-07-20 21:19:59,232 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:19:59,232 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432876630]
[2020-07-20 21:19:59,233 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:19:59,306 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:19:59,306 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:19:59,308 INFO  L263         TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core
[2020-07-20 21:19:59,323 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:21:44,630 WARN  L193               SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 35
[2020-07-20 21:21:44,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked.
[2020-07-20 21:21:44,691 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:21:45,712 WARN  L193               SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20
[2020-07-20 21:21:45,837 WARN  L193               SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20
[2020-07-20 21:21:45,995 WARN  L193               SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 25
[2020-07-20 21:21:46,149 WARN  L193               SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 25
[2020-07-20 21:21:46,339 WARN  L193               SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:21:46,526 WARN  L193               SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:21:46,745 WARN  L193               SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:21:46,961 WARN  L193               SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:21:47,209 WARN  L193               SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:21:47,457 WARN  L193               SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:21:47,738 WARN  L193               SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:21:48,021 WARN  L193               SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:21:48,335 WARN  L193               SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:21:48,646 WARN  L193               SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:21:49,006 WARN  L193               SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:21:49,350 WARN  L193               SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:21:49,729 WARN  L193               SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:21:50,107 WARN  L193               SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:21:50,523 WARN  L193               SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 69
[2020-07-20 21:21:50,932 WARN  L193               SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 69
[2020-07-20 21:21:51,400 WARN  L193               SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 75
[2020-07-20 21:21:51,846 WARN  L193               SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 75
[2020-07-20 21:21:52,336 WARN  L193               SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 79
[2020-07-20 21:21:52,827 WARN  L193               SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 79
[2020-07-20 21:21:53,919 WARN  L193               SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20
[2020-07-20 21:21:54,045 WARN  L193               SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20
[2020-07-20 21:21:54,201 WARN  L193               SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 25
[2020-07-20 21:21:54,359 WARN  L193               SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 25
[2020-07-20 21:21:54,546 WARN  L193               SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:21:54,735 WARN  L193               SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:21:54,958 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:21:55,174 WARN  L193               SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:21:55,427 WARN  L193               SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:21:55,678 WARN  L193               SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:21:55,961 WARN  L193               SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:21:56,247 WARN  L193               SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:21:56,570 WARN  L193               SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:21:56,893 WARN  L193               SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:21:57,243 WARN  L193               SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:21:57,596 WARN  L193               SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:21:57,984 WARN  L193               SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:21:58,370 WARN  L193               SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:21:58,790 WARN  L193               SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 69
[2020-07-20 21:21:59,219 WARN  L193               SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 69
[2020-07-20 21:21:59,516 WARN  L193               SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 54
[2020-07-20 21:21:59,779 WARN  L193               SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 50
[2020-07-20 21:22:00,019 WARN  L193               SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 46
[2020-07-20 21:22:00,243 WARN  L193               SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 43
[2020-07-20 21:22:00,433 WARN  L193               SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 40
[2020-07-20 21:22:00,609 WARN  L193               SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:22:01,039 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432876630]
[2020-07-20 21:22:01,039 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-20 21:22:01,039 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18
[2020-07-20 21:22:01,040 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123533929]
[2020-07-20 21:22:01,040 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-07-20 21:22:01,040 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:22:01,041 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-07-20 21:22:01,041 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=392, Unknown=42, NotChecked=0, Total=506
[2020-07-20 21:22:01,041 INFO  L87              Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states.
[2020-07-20 21:25:09,481 WARN  L193               SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:25:21,716 WARN  L193               SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 33
[2020-07-20 21:25:31,707 WARN  L193               SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 35
[2020-07-20 21:25:38,602 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:25:38,602 INFO  L93              Difference]: Finished difference Result 41 states and 42 transitions.
[2020-07-20 21:25:38,620 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2020-07-20 21:25:38,621 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 50
[2020-07-20 21:25:38,621 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:25:38,622 INFO  L225             Difference]: With dead ends: 41
[2020-07-20 21:25:38,623 INFO  L226             Difference]: Without dead ends: 37
[2020-07-20 21:25:38,626 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 236.9s TimeCoverageRelationStatistics Valid=150, Invalid=1034, Unknown=76, NotChecked=0, Total=1260
[2020-07-20 21:25:38,626 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2020-07-20 21:25:38,638 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37.
[2020-07-20 21:25:38,638 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2020-07-20 21:25:38,639 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions.
[2020-07-20 21:25:38,639 INFO  L78                 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50
[2020-07-20 21:25:38,640 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:25:38,640 INFO  L479      AbstractCegarLoop]: Abstraction has 37 states and 38 transitions.
[2020-07-20 21:25:38,640 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-07-20 21:25:38,640 INFO  L276                IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions.
[2020-07-20 21:25:38,644 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-20 21:25:38,645 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:25:38,645 INFO  L422         BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:25:38,850 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:25:38,851 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:25:38,852 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:25:38,852 INFO  L82        PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 6 times
[2020-07-20 21:25:38,853 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:25:38,853 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664757858]
[2020-07-20 21:25:38,854 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:25:38,948 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 21:25:38,948 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:25:38,950 INFO  L263         TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core
[2020-07-20 21:25:38,953 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:26:37,173 WARN  L193               SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:26:53,886 WARN  L193               SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 33
[2020-07-20 21:27:26,621 WARN  L193               SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 35
[2020-07-20 21:28:18,213 WARN  L193               SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 37
[2020-07-20 21:28:34,825 WARN  L194               Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory")

[2020-07-20 21:28:34,827 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664757858]
[2020-07-20 21:28:34,828 WARN  L333   FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory")

[2020-07-20 21:28:34,828 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:28:34,829 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0
[2020-07-20 21:28:34,829 ERROR L206   FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible
[2020-07-20 21:28:34,829 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 21:28:35,037 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:28:35,062 WARN  L231   ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2020-07-20 21:28:35,063 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:28:35 BoogieIcfgContainer
[2020-07-20 21:28:35,063 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 21:28:35,067 INFO  L168              Benchmark]: Toolchain (without parser) took 884352.13 ms. Allocated memory was 137.9 MB in the beginning and 228.6 MB in the end (delta: 90.7 MB). Free memory was 103.0 MB in the beginning and 187.6 MB in the end (delta: -84.6 MB). Peak memory consumption was 6.1 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,068 INFO  L168              Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,069 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 255.88 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,070 INFO  L168              Benchmark]: Boogie Preprocessor took 29.07 ms. Allocated memory is still 137.9 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,071 INFO  L168              Benchmark]: RCFGBuilder took 378.28 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 170.0 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,071 INFO  L168              Benchmark]: TraceAbstraction took 883680.87 ms. Allocated memory was 201.9 MB in the beginning and 228.6 MB in the end (delta: 26.7 MB). Free memory was 169.6 MB in the beginning and 187.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,075 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.73 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 255.88 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 29.07 ms. Allocated memory is still 137.9 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 378.28 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 170.0 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 883680.87 ms. Allocated memory was 201.9 MB in the beginning and 228.6 MB in the end (delta: 26.7 MB). Free memory was 169.6 MB in the beginning and 187.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - UnprovableResult [Line: 33]: Unable to prove that call of __VERIFIER_error() unreachable
    Unable to prove that call of __VERIFIER_error() unreachable
 Reason: unable to decide satisfiability of path constraint. 
Possible FailurePath: 
[L25]              int n = __VERIFIER_nondet_int();
[L26]  COND FALSE  !(n < 1 || n > 31)
[L29]  CALL, EXPR  hanoi(n)
[L17]  COND FALSE  !(n == 1)
[L20]  CALL, EXPR  hanoi(n-1)
[L17]  COND FALSE  !(n == 1)
[L20]  CALL, EXPR  hanoi(n-1)
[L17]  COND FALSE  !(n == 1)
[L20]  CALL, EXPR  hanoi(n-1)
[L17]  COND FALSE  !(n == 1)
[L20]  CALL, EXPR  hanoi(n-1)
[L17]  COND FALSE  !(n == 1)
[L20]  CALL, EXPR  hanoi(n-1)
[L17]  COND FALSE  !(n == 1)
[L20]  CALL, EXPR  hanoi(n-1)
[L17]  COND FALSE  !(n == 1)
[L20]  CALL, EXPR  hanoi(n-1)
[L17]  COND TRUE   n == 1
[L18]              return 1;
[L20]  RET, EXPR   hanoi(n-1)
[L20]              return 2 * (hanoi(n-1)) + 1;
[L20]  RET, EXPR   hanoi(n-1)
[L20]              return 2 * (hanoi(n-1)) + 1;
[L20]  RET, EXPR   hanoi(n-1)
[L20]              return 2 * (hanoi(n-1)) + 1;
[L20]  RET, EXPR   hanoi(n-1)
[L20]              return 2 * (hanoi(n-1)) + 1;
[L20]  RET, EXPR   hanoi(n-1)
[L20]              return 2 * (hanoi(n-1)) + 1;
[L20]  RET, EXPR   hanoi(n-1)
[L20]              return 2 * (hanoi(n-1)) + 1;
[L20]  RET, EXPR   hanoi(n-1)
[L20]              return 2 * (hanoi(n-1)) + 1;
[L29]  RET, EXPR   hanoi(n)
[L29]              int result = hanoi(n);
[L30]  COND FALSE  !(result >= n)
[L33]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 883.5s, OverallIterations: 7, TraceHistogramMax: 8, AutomataDifference: 427.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 48 SDslu, 785 SDs, 0 SdLazy, 963 SolverSat, 22 SolverUnsat, 75 SolverUnknown, 0 SolverNotchecked, 161.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 503.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 277.9s InterpolantComputationTime, 198 NumberOfCodeBlocks, 149 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 211 ConstructedInterpolants, 54 QuantifiedInterpolants, 84029 SizeOfPredicates, 38 NumberOfNonLiveVariables, 411 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 141/284 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 could not prove your program: unable to determine feasibility of some traces