/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/locks/test_locks_7.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 21:49:39,222 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 21:49:39,226 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 21:49:39,247 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 21:49:39,248 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 21:49:39,250 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 21:49:39,252 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 21:49:39,263 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 21:49:39,269 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 21:49:39,273 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 21:49:39,274 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 21:49:39,275 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 21:49:39,276 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 21:49:39,278 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 21:49:39,280 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 21:49:39,281 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 21:49:39,283 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 21:49:39,284 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 21:49:39,286 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 21:49:39,292 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 21:49:39,298 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 21:49:39,302 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 21:49:39,303 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 21:49:39,304 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 21:49:39,307 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 21:49:39,307 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 21:49:39,307 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 21:49:39,310 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 21:49:39,310 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 21:49:39,312 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 21:49:39,312 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 21:49:39,313 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 21:49:39,314 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 21:49:39,315 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 21:49:39,316 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 21:49:39,316 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 21:49:39,317 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 21:49:39,317 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 21:49:39,318 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 21:49:39,318 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 21:49:39,320 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 21:49:39,321 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 21:49:39,357 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 21:49:39,357 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 21:49:39,363 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 21:49:39,363 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 21:49:39,363 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 21:49:39,364 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 21:49:39,364 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 21:49:39,364 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 21:49:39,364 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 21:49:39,365 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 21:49:39,365 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 21:49:39,365 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 21:49:39,367 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 21:49:39,367 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 21:49:39,368 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 21:49:39,368 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 21:49:39,368 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 21:49:39,368 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 21:49:39,369 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 21:49:39,369 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 21:49:39,369 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 21:49:39,369 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 21:49:39,369 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 21:49:39,370 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 21:49:39,370 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 21:49:39,370 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 21:49:39,371 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:39,371 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 21:49:39,372 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 21:49:39,372 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 21:49:39,676 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 21:49:39,690 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 21:49:39,694 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 21:49:39,696 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 21:49:39,697 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 21:49:39,698 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_7.c
[2020-07-20 21:49:39,775 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82d78dc2/f4b0795fc28c40cbad7c9ef7f0c8d8cd/FLAG8de20a630
[2020-07-20 21:49:40,335 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 21:49:40,336 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_7.c
[2020-07-20 21:49:40,346 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82d78dc2/f4b0795fc28c40cbad7c9ef7f0c8d8cd/FLAG8de20a630
[2020-07-20 21:49:40,681 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82d78dc2/f4b0795fc28c40cbad7c9ef7f0c8d8cd
[2020-07-20 21:49:40,692 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 21:49:40,694 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 21:49:40,696 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 21:49:40,696 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 21:49:40,700 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 21:49:40,701 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:40" (1/1) ...
[2020-07-20 21:49:40,705 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19eb74fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:40, skipping insertion in model container
[2020-07-20 21:49:40,705 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:49:40" (1/1) ...
[2020-07-20 21:49:40,715 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 21:49:40,739 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 21:49:40,981 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:49:40,987 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 21:49:41,016 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:49:41,031 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 21:49:41,031 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41 WrapperNode
[2020-07-20 21:49:41,032 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 21:49:41,033 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 21:49:41,033 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 21:49:41,033 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 21:49:41,143 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ...
[2020-07-20 21:49:41,145 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ...
[2020-07-20 21:49:41,152 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ...
[2020-07-20 21:49:41,153 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ...
[2020-07-20 21:49:41,158 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ...
[2020-07-20 21:49:41,166 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ...
[2020-07-20 21:49:41,168 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (1/1) ...
[2020-07-20 21:49:41,170 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 21:49:41,171 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 21:49:41,171 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 21:49:41,171 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 21:49:41,173 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (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 21:49:41,243 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 21:49:41,243 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 21:49:41,243 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 21:49:41,243 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 21:49:41,244 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 21:49:41,244 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 21:49:41,244 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 21:49:41,244 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 21:49:41,545 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 21:49:41,545 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 21:49:41,552 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:41 BoogieIcfgContainer
[2020-07-20 21:49:41,553 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 21:49:41,554 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 21:49:41,554 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 21:49:41,560 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 21:49:41,560 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:49:40" (1/3) ...
[2020-07-20 21:49:41,561 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aafc6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:41, skipping insertion in model container
[2020-07-20 21:49:41,562 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:49:41" (2/3) ...
[2020-07-20 21:49:41,562 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aafc6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:49:41, skipping insertion in model container
[2020-07-20 21:49:41,563 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:49:41" (3/3) ...
[2020-07-20 21:49:41,566 INFO  L109   eAbstractionObserver]: Analyzing ICFG test_locks_7.c
[2020-07-20 21:49:41,584 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 21:49:41,594 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 21:49:41,616 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 21:49:41,655 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 21:49:41,655 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 21:49:41,655 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 21:49:41,655 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 21:49:41,656 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 21:49:41,656 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 21:49:41,656 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 21:49:41,657 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 21:49:41,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states.
[2020-07-20 21:49:41,691 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-07-20 21:49:41,691 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:41,693 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:41,693 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:41,700 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:41,701 INFO  L82        PathProgramCache]: Analyzing trace with hash 1819770524, now seen corresponding path program 1 times
[2020-07-20 21:49:41,713 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:41,713 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259527886]
[2020-07-20 21:49:41,714 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 21:49:41,816 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:49:41,816 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:41,820 INFO  L263         TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:41,826 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:41,872 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 21:49:41,872 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:41,874 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259527886]
[2020-07-20 21:49:41,875 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:41,876 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:41,877 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121060607]
[2020-07-20 21:49:41,881 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:41,882 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:41,893 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:41,894 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:41,896 INFO  L87              Difference]: Start difference. First operand 35 states. Second operand 3 states.
[2020-07-20 21:49:41,959 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:41,960 INFO  L93              Difference]: Finished difference Result 69 states and 114 transitions.
[2020-07-20 21:49:41,961 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:41,963 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 17
[2020-07-20 21:49:41,964 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:41,982 INFO  L225             Difference]: With dead ends: 69
[2020-07-20 21:49:41,982 INFO  L226             Difference]: Without dead ends: 54
[2020-07-20 21:49:41,986 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:42,005 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2020-07-20 21:49:42,036 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38.
[2020-07-20 21:49:42,038 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 38 states.
[2020-07-20 21:49:42,043 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 65 transitions.
[2020-07-20 21:49:42,045 INFO  L78                 Accepts]: Start accepts. Automaton has 38 states and 65 transitions. Word has length 17
[2020-07-20 21:49:42,045 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:42,046 INFO  L479      AbstractCegarLoop]: Abstraction has 38 states and 65 transitions.
[2020-07-20 21:49:42,046 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:42,046 INFO  L276                IsEmpty]: Start isEmpty. Operand 38 states and 65 transitions.
[2020-07-20 21:49:42,047 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-07-20 21:49:42,048 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:42,048 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:42,263 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:42,264 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:42,265 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:42,265 INFO  L82        PathProgramCache]: Analyzing trace with hash 1426743514, now seen corresponding path program 1 times
[2020-07-20 21:49:42,266 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:42,266 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928207769]
[2020-07-20 21:49:42,267 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 21:49:42,324 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:49:42,324 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:42,325 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:42,327 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:42,342 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 21:49:42,343 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:42,344 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928207769]
[2020-07-20 21:49:42,345 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:42,345 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:42,345 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601969313]
[2020-07-20 21:49:42,349 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:42,349 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:42,350 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:42,350 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:42,350 INFO  L87              Difference]: Start difference. First operand 38 states and 65 transitions. Second operand 3 states.
[2020-07-20 21:49:42,385 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:42,386 INFO  L93              Difference]: Finished difference Result 87 states and 152 transitions.
[2020-07-20 21:49:42,387 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:42,387 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 17
[2020-07-20 21:49:42,388 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:42,390 INFO  L225             Difference]: With dead ends: 87
[2020-07-20 21:49:42,390 INFO  L226             Difference]: Without dead ends: 54
[2020-07-20 21:49:42,392 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:42,393 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2020-07-20 21:49:42,400 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52.
[2020-07-20 21:49:42,401 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-07-20 21:49:42,403 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 89 transitions.
[2020-07-20 21:49:42,403 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 89 transitions. Word has length 17
[2020-07-20 21:49:42,404 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:42,404 INFO  L479      AbstractCegarLoop]: Abstraction has 52 states and 89 transitions.
[2020-07-20 21:49:42,404 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:42,404 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 89 transitions.
[2020-07-20 21:49:42,405 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-20 21:49:42,406 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:42,406 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:42,618 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:42,619 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:42,619 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:42,620 INFO  L82        PathProgramCache]: Analyzing trace with hash 578525748, now seen corresponding path program 1 times
[2020-07-20 21:49:42,621 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:42,621 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150148609]
[2020-07-20 21:49:42,621 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 21:49:42,688 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:49:42,688 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:42,689 INFO  L263         TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:42,693 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:42,708 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 21:49:42,709 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:42,709 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150148609]
[2020-07-20 21:49:42,710 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:42,710 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:42,710 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835692211]
[2020-07-20 21:49:42,711 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:42,711 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:42,711 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:42,711 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:42,712 INFO  L87              Difference]: Start difference. First operand 52 states and 89 transitions. Second operand 3 states.
[2020-07-20 21:49:42,736 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:42,736 INFO  L93              Difference]: Finished difference Result 81 states and 135 transitions.
[2020-07-20 21:49:42,737 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:42,737 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 18
[2020-07-20 21:49:42,737 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:42,739 INFO  L225             Difference]: With dead ends: 81
[2020-07-20 21:49:42,739 INFO  L226             Difference]: Without dead ends: 57
[2020-07-20 21:49:42,740 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:42,740 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2020-07-20 21:49:42,754 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55.
[2020-07-20 21:49:42,754 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 55 states.
[2020-07-20 21:49:42,756 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 91 transitions.
[2020-07-20 21:49:42,758 INFO  L78                 Accepts]: Start accepts. Automaton has 55 states and 91 transitions. Word has length 18
[2020-07-20 21:49:42,759 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:42,759 INFO  L479      AbstractCegarLoop]: Abstraction has 55 states and 91 transitions.
[2020-07-20 21:49:42,759 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:42,759 INFO  L276                IsEmpty]: Start isEmpty. Operand 55 states and 91 transitions.
[2020-07-20 21:49:42,760 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-20 21:49:42,760 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:42,761 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:42,976 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:42,977 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:42,978 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:42,978 INFO  L82        PathProgramCache]: Analyzing trace with hash 1279590326, now seen corresponding path program 1 times
[2020-07-20 21:49:42,978 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:42,978 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964189279]
[2020-07-20 21:49:42,979 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 21:49:43,023 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:49:43,023 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:43,025 INFO  L263         TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:43,027 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:43,046 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 21:49:43,046 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:43,047 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964189279]
[2020-07-20 21:49:43,047 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:43,048 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:43,048 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925254015]
[2020-07-20 21:49:43,049 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:43,049 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:43,050 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:43,051 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:43,051 INFO  L87              Difference]: Start difference. First operand 55 states and 91 transitions. Second operand 3 states.
[2020-07-20 21:49:43,082 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:43,082 INFO  L93              Difference]: Finished difference Result 100 states and 168 transitions.
[2020-07-20 21:49:43,083 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:43,083 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 18
[2020-07-20 21:49:43,084 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:43,085 INFO  L225             Difference]: With dead ends: 100
[2020-07-20 21:49:43,086 INFO  L226             Difference]: Without dead ends: 98
[2020-07-20 21:49:43,087 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:43,087 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98 states.
[2020-07-20 21:49:43,096 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 72.
[2020-07-20 21:49:43,097 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 72 states.
[2020-07-20 21:49:43,098 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 120 transitions.
[2020-07-20 21:49:43,099 INFO  L78                 Accepts]: Start accepts. Automaton has 72 states and 120 transitions. Word has length 18
[2020-07-20 21:49:43,099 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:43,099 INFO  L479      AbstractCegarLoop]: Abstraction has 72 states and 120 transitions.
[2020-07-20 21:49:43,100 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:43,100 INFO  L276                IsEmpty]: Start isEmpty. Operand 72 states and 120 transitions.
[2020-07-20 21:49:43,101 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-07-20 21:49:43,101 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:43,101 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:43,316 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:43,317 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:43,317 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:43,318 INFO  L82        PathProgramCache]: Analyzing trace with hash 886563316, now seen corresponding path program 1 times
[2020-07-20 21:49:43,318 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:43,319 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1337762684]
[2020-07-20 21:49:43,320 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 21:49:43,360 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:49:43,361 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:43,362 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:43,364 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:43,372 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 21:49:43,372 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:43,373 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1337762684]
[2020-07-20 21:49:43,373 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:43,373 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:43,374 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655724657]
[2020-07-20 21:49:43,374 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:43,374 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:43,375 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:43,375 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:43,375 INFO  L87              Difference]: Start difference. First operand 72 states and 120 transitions. Second operand 3 states.
[2020-07-20 21:49:43,407 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:43,408 INFO  L93              Difference]: Finished difference Result 164 states and 278 transitions.
[2020-07-20 21:49:43,422 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:43,422 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 18
[2020-07-20 21:49:43,422 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:43,425 INFO  L225             Difference]: With dead ends: 164
[2020-07-20 21:49:43,425 INFO  L226             Difference]: Without dead ends: 100
[2020-07-20 21:49:43,427 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:43,428 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 100 states.
[2020-07-20 21:49:43,445 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98.
[2020-07-20 21:49:43,446 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 98 states.
[2020-07-20 21:49:43,447 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 162 transitions.
[2020-07-20 21:49:43,448 INFO  L78                 Accepts]: Start accepts. Automaton has 98 states and 162 transitions. Word has length 18
[2020-07-20 21:49:43,448 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:43,448 INFO  L479      AbstractCegarLoop]: Abstraction has 98 states and 162 transitions.
[2020-07-20 21:49:43,448 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:43,448 INFO  L276                IsEmpty]: Start isEmpty. Operand 98 states and 162 transitions.
[2020-07-20 21:49:43,450 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-20 21:49:43,450 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:43,450 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:43,665 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:43,666 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:43,667 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:43,667 INFO  L82        PathProgramCache]: Analyzing trace with hash 1012809135, now seen corresponding path program 1 times
[2020-07-20 21:49:43,668 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:43,668 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80317654]
[2020-07-20 21:49:43,668 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 21:49:43,716 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:49:43,716 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:43,719 INFO  L263         TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:43,722 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:43,741 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 21:49:43,744 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:43,744 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80317654]
[2020-07-20 21:49:43,745 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:43,745 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:43,745 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465224649]
[2020-07-20 21:49:43,746 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:43,746 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:43,746 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:43,746 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:43,747 INFO  L87              Difference]: Start difference. First operand 98 states and 162 transitions. Second operand 3 states.
[2020-07-20 21:49:43,782 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:43,783 INFO  L93              Difference]: Finished difference Result 147 states and 241 transitions.
[2020-07-20 21:49:43,783 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:43,784 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 19
[2020-07-20 21:49:43,784 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:43,785 INFO  L225             Difference]: With dead ends: 147
[2020-07-20 21:49:43,785 INFO  L226             Difference]: Without dead ends: 102
[2020-07-20 21:49:43,791 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:43,792 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 102 states.
[2020-07-20 21:49:43,809 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100.
[2020-07-20 21:49:43,809 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 100 states.
[2020-07-20 21:49:43,812 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 162 transitions.
[2020-07-20 21:49:43,814 INFO  L78                 Accepts]: Start accepts. Automaton has 100 states and 162 transitions. Word has length 19
[2020-07-20 21:49:43,814 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:43,814 INFO  L479      AbstractCegarLoop]: Abstraction has 100 states and 162 transitions.
[2020-07-20 21:49:43,814 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:43,815 INFO  L276                IsEmpty]: Start isEmpty. Operand 100 states and 162 transitions.
[2020-07-20 21:49:43,816 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-20 21:49:43,816 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:43,816 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:44,032 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:44,033 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:44,034 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:44,034 INFO  L82        PathProgramCache]: Analyzing trace with hash 1713873713, now seen corresponding path program 1 times
[2020-07-20 21:49:44,035 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:44,035 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995949189]
[2020-07-20 21:49:44,036 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 21:49:44,080 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:49:44,081 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:44,082 INFO  L263         TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:44,086 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:44,102 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 21:49:44,103 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:44,103 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995949189]
[2020-07-20 21:49:44,104 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:44,104 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:44,104 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100892771]
[2020-07-20 21:49:44,104 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:44,105 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:44,105 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:44,105 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:44,105 INFO  L87              Difference]: Start difference. First operand 100 states and 162 transitions. Second operand 3 states.
[2020-07-20 21:49:44,127 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:44,128 INFO  L93              Difference]: Finished difference Result 180 states and 296 transitions.
[2020-07-20 21:49:44,128 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:44,128 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 19
[2020-07-20 21:49:44,129 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:44,130 INFO  L225             Difference]: With dead ends: 180
[2020-07-20 21:49:44,130 INFO  L226             Difference]: Without dead ends: 178
[2020-07-20 21:49:44,131 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:44,132 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 178 states.
[2020-07-20 21:49:44,142 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136.
[2020-07-20 21:49:44,143 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 136 states.
[2020-07-20 21:49:44,144 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 218 transitions.
[2020-07-20 21:49:44,145 INFO  L78                 Accepts]: Start accepts. Automaton has 136 states and 218 transitions. Word has length 19
[2020-07-20 21:49:44,145 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:44,145 INFO  L479      AbstractCegarLoop]: Abstraction has 136 states and 218 transitions.
[2020-07-20 21:49:44,145 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:44,145 INFO  L276                IsEmpty]: Start isEmpty. Operand 136 states and 218 transitions.
[2020-07-20 21:49:44,147 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-20 21:49:44,147 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:44,147 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:44,362 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:44,363 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:44,363 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:44,364 INFO  L82        PathProgramCache]: Analyzing trace with hash 1320846703, now seen corresponding path program 1 times
[2020-07-20 21:49:44,364 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:44,365 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245162645]
[2020-07-20 21:49:44,365 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:44,398 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:49:44,399 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:44,400 INFO  L263         TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:44,401 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:44,408 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 21:49:44,409 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:44,409 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245162645]
[2020-07-20 21:49:44,410 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:44,410 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:44,410 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968111242]
[2020-07-20 21:49:44,411 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:44,411 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:44,411 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:44,411 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:44,411 INFO  L87              Difference]: Start difference. First operand 136 states and 218 transitions. Second operand 3 states.
[2020-07-20 21:49:44,443 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:44,443 INFO  L93              Difference]: Finished difference Result 312 states and 504 transitions.
[2020-07-20 21:49:44,444 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:44,444 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 19
[2020-07-20 21:49:44,445 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:44,446 INFO  L225             Difference]: With dead ends: 312
[2020-07-20 21:49:44,446 INFO  L226             Difference]: Without dead ends: 186
[2020-07-20 21:49:44,448 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:44,449 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 186 states.
[2020-07-20 21:49:44,460 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184.
[2020-07-20 21:49:44,460 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 184 states.
[2020-07-20 21:49:44,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 290 transitions.
[2020-07-20 21:49:44,462 INFO  L78                 Accepts]: Start accepts. Automaton has 184 states and 290 transitions. Word has length 19
[2020-07-20 21:49:44,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:44,463 INFO  L479      AbstractCegarLoop]: Abstraction has 184 states and 290 transitions.
[2020-07-20 21:49:44,463 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:44,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 184 states and 290 transitions.
[2020-07-20 21:49:44,465 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-20 21:49:44,465 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:44,465 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:44,680 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:44,681 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:44,682 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:44,682 INFO  L82        PathProgramCache]: Analyzing trace with hash 1590692585, now seen corresponding path program 1 times
[2020-07-20 21:49:44,683 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:44,683 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2628704]
[2020-07-20 21:49:44,684 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:44,713 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:49:44,714 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:44,715 INFO  L263         TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:44,716 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:44,732 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 21:49:44,732 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:44,732 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2628704]
[2020-07-20 21:49:44,733 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:44,733 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:44,733 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784747982]
[2020-07-20 21:49:44,734 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:44,734 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:44,734 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:44,735 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:44,735 INFO  L87              Difference]: Start difference. First operand 184 states and 290 transitions. Second operand 3 states.
[2020-07-20 21:49:44,764 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:44,764 INFO  L93              Difference]: Finished difference Result 328 states and 524 transitions.
[2020-07-20 21:49:44,764 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:44,765 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 20
[2020-07-20 21:49:44,765 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:44,768 INFO  L225             Difference]: With dead ends: 328
[2020-07-20 21:49:44,771 INFO  L226             Difference]: Without dead ends: 326
[2020-07-20 21:49:44,772 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:44,773 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 326 states.
[2020-07-20 21:49:44,811 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 260.
[2020-07-20 21:49:44,811 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 260 states.
[2020-07-20 21:49:44,813 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 402 transitions.
[2020-07-20 21:49:44,814 INFO  L78                 Accepts]: Start accepts. Automaton has 260 states and 402 transitions. Word has length 20
[2020-07-20 21:49:44,814 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:44,814 INFO  L479      AbstractCegarLoop]: Abstraction has 260 states and 402 transitions.
[2020-07-20 21:49:44,814 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:44,814 INFO  L276                IsEmpty]: Start isEmpty. Operand 260 states and 402 transitions.
[2020-07-20 21:49:44,822 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-20 21:49:44,825 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:44,826 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:45,026 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:45,027 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:45,028 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:45,028 INFO  L82        PathProgramCache]: Analyzing trace with hash 1197665575, now seen corresponding path program 1 times
[2020-07-20 21:49:45,029 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:45,029 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348423831]
[2020-07-20 21:49:45,029 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:45,074 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:49:45,074 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:45,075 INFO  L263         TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:45,077 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:45,087 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 21:49:45,087 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:45,088 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348423831]
[2020-07-20 21:49:45,088 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:45,088 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:45,088 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508619645]
[2020-07-20 21:49:45,089 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:45,089 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:45,089 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:45,090 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:45,090 INFO  L87              Difference]: Start difference. First operand 260 states and 402 transitions. Second operand 3 states.
[2020-07-20 21:49:45,112 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:45,112 INFO  L93              Difference]: Finished difference Result 388 states and 596 transitions.
[2020-07-20 21:49:45,113 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:45,113 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 20
[2020-07-20 21:49:45,113 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:45,115 INFO  L225             Difference]: With dead ends: 388
[2020-07-20 21:49:45,115 INFO  L226             Difference]: Without dead ends: 266
[2020-07-20 21:49:45,116 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:45,117 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 266 states.
[2020-07-20 21:49:45,126 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 264.
[2020-07-20 21:49:45,126 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 264 states.
[2020-07-20 21:49:45,128 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 398 transitions.
[2020-07-20 21:49:45,128 INFO  L78                 Accepts]: Start accepts. Automaton has 264 states and 398 transitions. Word has length 20
[2020-07-20 21:49:45,128 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:45,128 INFO  L479      AbstractCegarLoop]: Abstraction has 264 states and 398 transitions.
[2020-07-20 21:49:45,128 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:45,128 INFO  L276                IsEmpty]: Start isEmpty. Operand 264 states and 398 transitions.
[2020-07-20 21:49:45,130 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-20 21:49:45,130 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:45,130 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:45,344 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:45,345 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:45,346 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:45,346 INFO  L82        PathProgramCache]: Analyzing trace with hash 1898730153, now seen corresponding path program 1 times
[2020-07-20 21:49:45,347 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:45,347 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442325954]
[2020-07-20 21:49:45,347 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:45,376 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:49:45,377 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:45,377 INFO  L263         TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:45,379 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:45,390 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 21:49:45,390 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:45,390 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442325954]
[2020-07-20 21:49:45,390 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:45,391 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:45,391 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074227916]
[2020-07-20 21:49:45,391 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:45,392 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:45,392 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:45,392 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:45,392 INFO  L87              Difference]: Start difference. First operand 264 states and 398 transitions. Second operand 3 states.
[2020-07-20 21:49:45,424 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:45,424 INFO  L93              Difference]: Finished difference Result 604 states and 912 transitions.
[2020-07-20 21:49:45,425 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:45,425 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 20
[2020-07-20 21:49:45,425 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:45,428 INFO  L225             Difference]: With dead ends: 604
[2020-07-20 21:49:45,428 INFO  L226             Difference]: Without dead ends: 354
[2020-07-20 21:49:45,435 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:45,436 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 354 states.
[2020-07-20 21:49:45,454 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 352.
[2020-07-20 21:49:45,454 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 352 states.
[2020-07-20 21:49:45,456 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 518 transitions.
[2020-07-20 21:49:45,457 INFO  L78                 Accepts]: Start accepts. Automaton has 352 states and 518 transitions. Word has length 20
[2020-07-20 21:49:45,457 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:45,457 INFO  L479      AbstractCegarLoop]: Abstraction has 352 states and 518 transitions.
[2020-07-20 21:49:45,457 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:45,457 INFO  L276                IsEmpty]: Start isEmpty. Operand 352 states and 518 transitions.
[2020-07-20 21:49:45,460 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 21:49:45,460 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:45,460 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:45,673 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:45,674 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:45,675 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:45,675 INFO  L82        PathProgramCache]: Analyzing trace with hash -1969756604, now seen corresponding path program 1 times
[2020-07-20 21:49:45,676 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:45,676 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722884010]
[2020-07-20 21:49:45,676 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:45,704 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:49:45,704 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:45,705 INFO  L263         TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:45,706 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:45,717 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 21:49:45,717 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:45,718 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722884010]
[2020-07-20 21:49:45,718 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:45,718 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:45,718 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715968371]
[2020-07-20 21:49:45,719 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:45,719 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:45,719 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:45,720 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:45,720 INFO  L87              Difference]: Start difference. First operand 352 states and 518 transitions. Second operand 3 states.
[2020-07-20 21:49:45,754 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:45,754 INFO  L93              Difference]: Finished difference Result 612 states and 912 transitions.
[2020-07-20 21:49:45,755 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:45,755 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-20 21:49:45,755 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:45,759 INFO  L225             Difference]: With dead ends: 612
[2020-07-20 21:49:45,759 INFO  L226             Difference]: Without dead ends: 610
[2020-07-20 21:49:45,760 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:45,761 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 610 states.
[2020-07-20 21:49:45,777 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 512.
[2020-07-20 21:49:45,777 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 512 states.
[2020-07-20 21:49:45,780 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 734 transitions.
[2020-07-20 21:49:45,780 INFO  L78                 Accepts]: Start accepts. Automaton has 512 states and 734 transitions. Word has length 21
[2020-07-20 21:49:45,781 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:45,781 INFO  L479      AbstractCegarLoop]: Abstraction has 512 states and 734 transitions.
[2020-07-20 21:49:45,781 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:45,781 INFO  L276                IsEmpty]: Start isEmpty. Operand 512 states and 734 transitions.
[2020-07-20 21:49:45,783 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-07-20 21:49:45,783 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:45,783 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:45,997 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:45,997 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:45,998 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:45,998 INFO  L82        PathProgramCache]: Analyzing trace with hash 1932183682, now seen corresponding path program 1 times
[2020-07-20 21:49:45,999 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:45,999 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357393955]
[2020-07-20 21:49:46,000 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:46,033 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:49:46,033 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:46,034 INFO  L263         TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:46,036 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:46,043 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 21:49:46,043 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:46,043 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357393955]
[2020-07-20 21:49:46,044 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:46,044 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:46,044 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253936512]
[2020-07-20 21:49:46,045 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:46,045 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:46,045 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:46,045 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:46,046 INFO  L87              Difference]: Start difference. First operand 512 states and 734 transitions. Second operand 3 states.
[2020-07-20 21:49:46,078 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:46,079 INFO  L93              Difference]: Finished difference Result 1172 states and 1680 transitions.
[2020-07-20 21:49:46,080 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:46,080 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 21
[2020-07-20 21:49:46,081 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:46,085 INFO  L225             Difference]: With dead ends: 1172
[2020-07-20 21:49:46,085 INFO  L226             Difference]: Without dead ends: 674
[2020-07-20 21:49:46,087 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:46,088 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 674 states.
[2020-07-20 21:49:46,126 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 672.
[2020-07-20 21:49:46,126 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 672 states.
[2020-07-20 21:49:46,129 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 934 transitions.
[2020-07-20 21:49:46,130 INFO  L78                 Accepts]: Start accepts. Automaton has 672 states and 934 transitions. Word has length 21
[2020-07-20 21:49:46,130 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:46,130 INFO  L479      AbstractCegarLoop]: Abstraction has 672 states and 934 transitions.
[2020-07-20 21:49:46,130 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:46,131 INFO  L276                IsEmpty]: Start isEmpty. Operand 672 states and 934 transitions.
[2020-07-20 21:49:46,132 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 21:49:46,132 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:46,133 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:46,345 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:46,346 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:46,347 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:46,347 INFO  L82        PathProgramCache]: Analyzing trace with hash -932696864, now seen corresponding path program 1 times
[2020-07-20 21:49:46,347 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:46,348 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973543724]
[2020-07-20 21:49:46,348 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:46,397 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:49:46,397 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:46,399 INFO  L263         TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:46,400 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:46,413 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 21:49:46,413 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:46,414 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973543724]
[2020-07-20 21:49:46,414 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:46,414 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:46,415 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288969831]
[2020-07-20 21:49:46,415 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:46,415 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:46,416 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:46,416 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:46,416 INFO  L87              Difference]: Start difference. First operand 672 states and 934 transitions. Second operand 3 states.
[2020-07-20 21:49:46,460 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:46,461 INFO  L93              Difference]: Finished difference Result 1140 states and 1592 transitions.
[2020-07-20 21:49:46,461 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:46,462 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-20 21:49:46,463 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:46,471 INFO  L225             Difference]: With dead ends: 1140
[2020-07-20 21:49:46,472 INFO  L226             Difference]: Without dead ends: 1138
[2020-07-20 21:49:46,474 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:46,477 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1138 states.
[2020-07-20 21:49:46,514 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1008.
[2020-07-20 21:49:46,515 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1008 states.
[2020-07-20 21:49:46,521 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1366 transitions.
[2020-07-20 21:49:46,522 INFO  L78                 Accepts]: Start accepts. Automaton has 1008 states and 1366 transitions. Word has length 22
[2020-07-20 21:49:46,522 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:46,523 INFO  L479      AbstractCegarLoop]: Abstraction has 1008 states and 1366 transitions.
[2020-07-20 21:49:46,523 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:46,523 INFO  L276                IsEmpty]: Start isEmpty. Operand 1008 states and 1366 transitions.
[2020-07-20 21:49:46,526 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 23
[2020-07-20 21:49:46,526 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:46,527 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:46,740 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:46,741 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:46,741 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:46,742 INFO  L82        PathProgramCache]: Analyzing trace with hash -1325723874, now seen corresponding path program 1 times
[2020-07-20 21:49:46,742 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:46,743 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650278288]
[2020-07-20 21:49:46,743 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:46,788 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:49:46,788 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:46,789 INFO  L263         TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:46,797 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:46,813 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 21:49:46,813 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:46,814 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650278288]
[2020-07-20 21:49:46,814 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:46,815 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:46,816 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745977028]
[2020-07-20 21:49:46,816 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:46,816 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:46,817 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:46,817 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:46,817 INFO  L87              Difference]: Start difference. First operand 1008 states and 1366 transitions. Second operand 3 states.
[2020-07-20 21:49:46,872 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:46,872 INFO  L93              Difference]: Finished difference Result 2292 states and 3096 transitions.
[2020-07-20 21:49:46,873 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:46,873 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 22
[2020-07-20 21:49:46,873 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:46,881 INFO  L225             Difference]: With dead ends: 2292
[2020-07-20 21:49:46,882 INFO  L226             Difference]: Without dead ends: 1298
[2020-07-20 21:49:46,887 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:46,889 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1298 states.
[2020-07-20 21:49:46,933 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1296.
[2020-07-20 21:49:46,934 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1296 states.
[2020-07-20 21:49:46,942 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1686 transitions.
[2020-07-20 21:49:46,942 INFO  L78                 Accepts]: Start accepts. Automaton has 1296 states and 1686 transitions. Word has length 22
[2020-07-20 21:49:46,943 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:46,943 INFO  L479      AbstractCegarLoop]: Abstraction has 1296 states and 1686 transitions.
[2020-07-20 21:49:46,943 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:46,943 INFO  L276                IsEmpty]: Start isEmpty. Operand 1296 states and 1686 transitions.
[2020-07-20 21:49:46,946 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 21:49:46,946 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:46,947 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:47,162 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:47,162 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:47,162 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:47,163 INFO  L82        PathProgramCache]: Analyzing trace with hash 1151384345, now seen corresponding path program 1 times
[2020-07-20 21:49:47,163 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:47,163 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573000455]
[2020-07-20 21:49:47,163 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:47,203 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:49:47,203 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:47,204 INFO  L263         TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:47,206 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:47,215 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 21:49:47,216 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:47,216 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573000455]
[2020-07-20 21:49:47,217 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:47,217 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:47,217 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422918567]
[2020-07-20 21:49:47,218 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:47,218 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:47,226 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:47,227 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:47,227 INFO  L87              Difference]: Start difference. First operand 1296 states and 1686 transitions. Second operand 3 states.
[2020-07-20 21:49:47,288 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:47,288 INFO  L93              Difference]: Finished difference Result 2130 states and 2743 transitions.
[2020-07-20 21:49:47,289 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:47,289 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-20 21:49:47,290 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:47,301 INFO  L225             Difference]: With dead ends: 2130
[2020-07-20 21:49:47,302 INFO  L226             Difference]: Without dead ends: 2128
[2020-07-20 21:49:47,304 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:47,307 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2128 states.
[2020-07-20 21:49:47,369 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 2000.
[2020-07-20 21:49:47,369 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2000 states.
[2020-07-20 21:49:47,380 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2000 states to 2000 states and 2550 transitions.
[2020-07-20 21:49:47,380 INFO  L78                 Accepts]: Start accepts. Automaton has 2000 states and 2550 transitions. Word has length 23
[2020-07-20 21:49:47,381 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:47,381 INFO  L479      AbstractCegarLoop]: Abstraction has 2000 states and 2550 transitions.
[2020-07-20 21:49:47,381 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:47,381 INFO  L276                IsEmpty]: Start isEmpty. Operand 2000 states and 2550 transitions.
[2020-07-20 21:49:47,386 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 21:49:47,387 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 21:49:47,387 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:49:47,602 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:47,603 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:49:47,603 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:49:47,603 INFO  L82        PathProgramCache]: Analyzing trace with hash 758357335, now seen corresponding path program 1 times
[2020-07-20 21:49:47,604 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:49:47,604 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212814852]
[2020-07-20 21:49:47,605 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 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:47,635 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:49:47,635 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:49:47,636 INFO  L263         TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 21:49:47,638 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:49:47,651 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 21:49:47,651 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:49:47,652 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212814852]
[2020-07-20 21:49:47,652 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:49:47,652 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 21:49:47,653 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847127316]
[2020-07-20 21:49:47,653 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 21:49:47,657 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:49:47,657 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 21:49:47,657 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:47,657 INFO  L87              Difference]: Start difference. First operand 2000 states and 2550 transitions. Second operand 3 states.
[2020-07-20 21:49:47,723 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:49:47,723 INFO  L93              Difference]: Finished difference Result 4496 states and 5686 transitions.
[2020-07-20 21:49:47,724 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 21:49:47,724 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 23
[2020-07-20 21:49:47,724 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:49:47,724 INFO  L225             Difference]: With dead ends: 4496
[2020-07-20 21:49:47,725 INFO  L226             Difference]: Without dead ends: 0
[2020-07-20 21:49:47,733 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 21:49:47,734 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 21:49:47,734 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 21:49:47,734 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 21:49:47,734 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 21:49:47,734 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23
[2020-07-20 21:49:47,735 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:49:47,735 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 21:49:47,735 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 21:49:47,735 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 21:49:47,735 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 21:49:47,951 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:49:47,954 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 21:49:48,035 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-07-20 21:49:48,035 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 21:49:48,035 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 21:49:48,035 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-07-20 21:49:48,036 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-07-20 21:49:48,036 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-07-20 21:49:48,036 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 4 121)  no Hoare annotation was computed.
[2020-07-20 21:49:48,036 INFO  L268        CegarLoopResult]: For program point  L102(line 102)  no Hoare annotation was computed.
[2020-07-20 21:49:48,036 INFO  L268        CegarLoopResult]: For program point  L86-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,036 INFO  L271        CegarLoopResult]: At program point  L111-1(lines 30 116)  the Hoare annotation is:  true
[2020-07-20 21:49:48,036 INFO  L268        CegarLoopResult]: For program point  L87(line 87)  no Hoare annotation was computed.
[2020-07-20 21:49:48,036 INFO  L268        CegarLoopResult]: For program point  L112(line 112)  no Hoare annotation was computed.
[2020-07-20 21:49:48,037 INFO  L264        CegarLoopResult]: At program point  L112-1(lines 5 121)  the Hoare annotation is:  false
[2020-07-20 21:49:48,037 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 4 121)  no Hoare annotation was computed.
[2020-07-20 21:49:48,037 INFO  L268        CegarLoopResult]: For program point  L71-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,037 INFO  L268        CegarLoopResult]: For program point  mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 119)  no Hoare annotation was computed.
[2020-07-20 21:49:48,037 INFO  L268        CegarLoopResult]: For program point  L96-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,037 INFO  L268        CegarLoopResult]: For program point  L63-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,038 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 4 121)  the Hoare annotation is:  true
[2020-07-20 21:49:48,038 INFO  L268        CegarLoopResult]: For program point  L55-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,038 INFO  L268        CegarLoopResult]: For program point  L97(line 97)  no Hoare annotation was computed.
[2020-07-20 21:49:48,038 INFO  L268        CegarLoopResult]: For program point  L81-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,038 INFO  L268        CegarLoopResult]: For program point  L106-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,038 INFO  L268        CegarLoopResult]: For program point  L32(lines 32 34)  no Hoare annotation was computed.
[2020-07-20 21:49:48,038 INFO  L268        CegarLoopResult]: For program point  L82(line 82)  no Hoare annotation was computed.
[2020-07-20 21:49:48,040 INFO  L268        CegarLoopResult]: For program point  L107(line 107)  no Hoare annotation was computed.
[2020-07-20 21:49:48,040 INFO  L268        CegarLoopResult]: For program point  L91-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,040 INFO  L268        CegarLoopResult]: For program point  L75-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,040 INFO  L268        CegarLoopResult]: For program point  L67-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,040 INFO  L268        CegarLoopResult]: For program point  L92(line 92)  no Hoare annotation was computed.
[2020-07-20 21:49:48,040 INFO  L268        CegarLoopResult]: For program point  L59-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,041 INFO  L271        CegarLoopResult]: At program point  L117(lines 5 121)  the Hoare annotation is:  true
[2020-07-20 21:49:48,041 INFO  L268        CegarLoopResult]: For program point  L51(lines 51 53)  no Hoare annotation was computed.
[2020-07-20 21:49:48,041 INFO  L268        CegarLoopResult]: For program point  L51-2(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,041 INFO  L268        CegarLoopResult]: For program point  L101-1(lines 30 116)  no Hoare annotation was computed.
[2020-07-20 21:49:48,056 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:49:48 BoogieIcfgContainer
[2020-07-20 21:49:48,057 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 21:49:48,060 INFO  L168              Benchmark]: Toolchain (without parser) took 7365.74 ms. Allocated memory was 137.4 MB in the beginning and 250.1 MB in the end (delta: 112.7 MB). Free memory was 102.1 MB in the beginning and 217.1 MB in the end (delta: -115.0 MB). Peak memory consumption was 123.9 MB. Max. memory is 7.1 GB.
[2020-07-20 21:49:48,061 INFO  L168              Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 21:49:48,062 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 336.67 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB.
[2020-07-20 21:49:48,063 INFO  L168              Benchmark]: Boogie Preprocessor took 137.74 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 178.5 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
[2020-07-20 21:49:48,063 INFO  L168              Benchmark]: RCFGBuilder took 382.11 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 162.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB.
[2020-07-20 21:49:48,068 INFO  L168              Benchmark]: TraceAbstraction took 6502.68 ms. Allocated memory was 201.3 MB in the beginning and 250.1 MB in the end (delta: 48.8 MB). Free memory was 161.3 MB in the beginning and 217.1 MB in the end (delta: -55.8 MB). Peak memory consumption was 119.1 MB. Max. memory is 7.1 GB.
[2020-07-20 21:49:48,071 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.26 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 336.67 ms. Allocated memory is still 137.4 MB. Free memory was 101.7 MB in the beginning and 91.5 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 137.74 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 91.5 MB in the beginning and 178.5 MB in the end (delta: -87.0 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 382.11 ms. Allocated memory is still 201.3 MB. Free memory was 178.5 MB in the beginning and 162.0 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 6502.68 ms. Allocated memory was 201.3 MB in the beginning and 250.1 MB in the end (delta: 48.8 MB). Free memory was 161.3 MB in the beginning and 217.1 MB in the end (delta: -55.8 MB). Peak memory consumption was 119.1 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 119]: call of __VERIFIER_error() unreachable
    For all program executions holds that call of __VERIFIER_error() unreachable at this location
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - InvariantResult [Line: 30]: Loop Invariant
    Derived loop invariant: 1
  - InvariantResult [Line: 5]: Loop Invariant
    Derived loop invariant: 0
  - InvariantResult [Line: 5]: Loop Invariant
    Derived loop invariant: 1
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 3 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6.3s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1049 SDtfs, 481 SDslu, 712 SDs, 0 SdLazy, 92 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 320 GetRequests, 303 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2000occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 17 MinimizatonAttempts, 524 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 138 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 337 NumberOfCodeBlocks, 227 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 320 ConstructedInterpolants, 0 QuantifiedInterpolants, 11208 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1230 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 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 correct!
Received shutdown request...