/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/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 23:11:08,401 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 23:11:08,403 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 23:11:08,423 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 23:11:08,423 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 23:11:08,424 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 23:11:08,426 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 23:11:08,427 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 23:11:08,429 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 23:11:08,430 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 23:11:08,431 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 23:11:08,432 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 23:11:08,432 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 23:11:08,433 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 23:11:08,434 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 23:11:08,435 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 23:11:08,436 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 23:11:08,437 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 23:11:08,439 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 23:11:08,441 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 23:11:08,442 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 23:11:08,443 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 23:11:08,445 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 23:11:08,445 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 23:11:08,448 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 23:11:08,448 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 23:11:08,449 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 23:11:08,449 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 23:11:08,450 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 23:11:08,451 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 23:11:08,451 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 23:11:08,452 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 23:11:08,452 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 23:11:08,453 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 23:11:08,454 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 23:11:08,454 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 23:11:08,455 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 23:11:08,455 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 23:11:08,455 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 23:11:08,456 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 23:11:08,457 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 23:11:08,458 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 23:11:08,472 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 23:11:08,473 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 23:11:08,474 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 23:11:08,474 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 23:11:08,474 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 23:11:08,475 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 23:11:08,475 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 23:11:08,475 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 23:11:08,475 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 23:11:08,475 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 23:11:08,476 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 23:11:08,476 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 23:11:08,476 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 23:11:08,476 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 23:11:08,476 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 23:11:08,477 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 23:11:08,477 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 23:11:08,477 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 23:11:08,477 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 23:11:08,477 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 23:11:08,478 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 23:11:08,478 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 23:11:08,478 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 23:11:08,478 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 23:11:08,478 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 23:11:08,479 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 23:11:08,479 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:08,479 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 23:11:08,479 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 23:11:08,479 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 23:11:08,755 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 23:11:08,768 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 23:11:08,772 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 23:11:08,773 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 23:11:08,773 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 23:11:08,774 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-07-20 23:11:08,834 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadc35409/adffe9deadb24d68a89076b56ac80cd8/FLAG0420bbf0d
[2020-07-20 23:11:09,540 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 23:11:09,540 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-07-20 23:11:09,571 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadc35409/adffe9deadb24d68a89076b56ac80cd8/FLAG0420bbf0d
[2020-07-20 23:11:09,703 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fadc35409/adffe9deadb24d68a89076b56ac80cd8
[2020-07-20 23:11:09,713 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 23:11:09,716 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 23:11:09,717 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 23:11:09,717 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 23:11:09,721 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 23:11:09,722 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:11:09" (1/1) ...
[2020-07-20 23:11:09,725 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d0f554d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:09, skipping insertion in model container
[2020-07-20 23:11:09,725 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:11:09" (1/1) ...
[2020-07-20 23:11:09,733 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 23:11:09,923 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 23:11:11,478 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 23:11:11,496 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 23:11:12,556 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 23:11:12,602 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 23:11:12,603 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12 WrapperNode
[2020-07-20 23:11:12,604 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 23:11:12,605 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 23:11:12,605 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 23:11:12,605 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 23:11:12,626 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12" (1/1) ...
[2020-07-20 23:11:12,628 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12" (1/1) ...
[2020-07-20 23:11:12,692 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12" (1/1) ...
[2020-07-20 23:11:12,693 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12" (1/1) ...
[2020-07-20 23:11:12,778 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12" (1/1) ...
[2020-07-20 23:11:12,819 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12" (1/1) ...
[2020-07-20 23:11:12,834 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12" (1/1) ...
[2020-07-20 23:11:12,852 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 23:11:12,852 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 23:11:12,852 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 23:11:12,853 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 23:11:12,858 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12" (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 23:11:12,938 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 23:11:12,938 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 23:11:12,938 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 23:11:12,938 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 23:11:12,939 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 23:11:12,940 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-07-20 23:11:12,940 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-07-20 23:11:12,940 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-20 23:11:12,940 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-07-20 23:11:12,940 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 23:11:12,941 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 23:11:12,942 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-07-20 23:11:12,942 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-07-20 23:11:12,942 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-07-20 23:11:12,942 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-07-20 23:11:12,943 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-07-20 23:11:12,943 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-07-20 23:11:12,944 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2020-07-20 23:11:12,944 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-07-20 23:11:12,944 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-07-20 23:11:12,944 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 23:11:12,945 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 23:11:12,945 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 23:11:17,337 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 23:11:17,338 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 23:11:17,354 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:11:17 BoogieIcfgContainer
[2020-07-20 23:11:17,354 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 23:11:17,356 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 23:11:17,356 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 23:11:17,358 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 23:11:17,359 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:11:09" (1/3) ...
[2020-07-20 23:11:17,359 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e813d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:11:17, skipping insertion in model container
[2020-07-20 23:11:17,360 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:12" (2/3) ...
[2020-07-20 23:11:17,360 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16e813d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:11:17, skipping insertion in model container
[2020-07-20 23:11:17,360 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:11:17" (3/3) ...
[2020-07-20 23:11:17,362 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-07-20 23:11:17,373 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 23:11:17,382 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 23:11:17,397 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 23:11:17,432 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 23:11:17,432 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 23:11:17,432 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 23:11:17,432 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 23:11:17,433 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 23:11:17,433 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 23:11:17,433 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 23:11:17,433 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 23:11:17,476 INFO  L276                IsEmpty]: Start isEmpty. Operand 1449 states.
[2020-07-20 23:11:17,509 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 497
[2020-07-20 23:11:17,509 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:17,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:17,511 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:17,518 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:17,519 INFO  L82        PathProgramCache]: Analyzing trace with hash -2033441387, now seen corresponding path program 1 times
[2020-07-20 23:11:17,529 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:17,530 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522147704]
[2020-07-20 23:11:17,531 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 23:11:17,991 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 23:11:17,992 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:17,999 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 23:11:18,023 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:18,445 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 23:11:18,445 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:18,447 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522147704]
[2020-07-20 23:11:18,447 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:18,448 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:11:18,449 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139975271]
[2020-07-20 23:11:18,455 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:11:18,455 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:18,469 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:11:18,470 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:11:18,472 INFO  L87              Difference]: Start difference. First operand 1449 states. Second operand 3 states.
[2020-07-20 23:11:18,897 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:18,897 INFO  L93              Difference]: Finished difference Result 1974 states and 3501 transitions.
[2020-07-20 23:11:18,898 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:11:18,899 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 496
[2020-07-20 23:11:18,903 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:18,931 INFO  L225             Difference]: With dead ends: 1974
[2020-07-20 23:11:18,932 INFO  L226             Difference]: Without dead ends: 1732
[2020-07-20 23:11:18,939 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 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 23:11:18,963 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1732 states.
[2020-07-20 23:11:19,069 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1730.
[2020-07-20 23:11:19,070 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1730 states.
[2020-07-20 23:11:19,079 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1730 states to 1730 states and 2860 transitions.
[2020-07-20 23:11:19,081 INFO  L78                 Accepts]: Start accepts. Automaton has 1730 states and 2860 transitions. Word has length 496
[2020-07-20 23:11:19,082 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:11:19,082 INFO  L479      AbstractCegarLoop]: Abstraction has 1730 states and 2860 transitions.
[2020-07-20 23:11:19,083 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:11:19,083 INFO  L276                IsEmpty]: Start isEmpty. Operand 1730 states and 2860 transitions.
[2020-07-20 23:11:19,094 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 497
[2020-07-20 23:11:19,094 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:19,095 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:19,308 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:19,309 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:19,309 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:19,310 INFO  L82        PathProgramCache]: Analyzing trace with hash 426855444, now seen corresponding path program 1 times
[2020-07-20 23:11:19,310 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:19,310 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341670913]
[2020-07-20 23:11:19,310 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 23:11:19,807 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:11:19,807 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:19,816 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 23:11:19,826 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:20,186 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 23:11:20,187 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:20,187 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341670913]
[2020-07-20 23:11:20,187 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:20,188 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 23:11:20,188 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059906773]
[2020-07-20 23:11:20,190 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 23:11:20,191 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:20,191 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 23:11:20,191 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-20 23:11:20,191 INFO  L87              Difference]: Start difference. First operand 1730 states and 2860 transitions. Second operand 4 states.
[2020-07-20 23:11:20,512 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:20,513 INFO  L93              Difference]: Finished difference Result 5127 states and 8477 transitions.
[2020-07-20 23:11:20,513 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 23:11:20,514 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 496
[2020-07-20 23:11:20,514 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:20,534 INFO  L225             Difference]: With dead ends: 5127
[2020-07-20 23:11:20,534 INFO  L226             Difference]: Without dead ends: 3412
[2020-07-20 23:11:20,540 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 493 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-20 23:11:20,546 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3412 states.
[2020-07-20 23:11:20,667 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3410.
[2020-07-20 23:11:20,668 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3410 states.
[2020-07-20 23:11:20,682 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 5616 transitions.
[2020-07-20 23:11:20,682 INFO  L78                 Accepts]: Start accepts. Automaton has 3410 states and 5616 transitions. Word has length 496
[2020-07-20 23:11:20,683 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:11:20,683 INFO  L479      AbstractCegarLoop]: Abstraction has 3410 states and 5616 transitions.
[2020-07-20 23:11:20,683 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 23:11:20,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 3410 states and 5616 transitions.
[2020-07-20 23:11:20,697 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 499
[2020-07-20 23:11:20,698 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:20,698 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:20,912 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:20,913 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:20,913 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:20,913 INFO  L82        PathProgramCache]: Analyzing trace with hash 598630969, now seen corresponding path program 1 times
[2020-07-20 23:11:20,914 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:20,914 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926391126]
[2020-07-20 23:11:20,915 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 23:11:21,390 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:11:21,390 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:21,399 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:11:21,408 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:21,655 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 23:11:21,655 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:21,656 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926391126]
[2020-07-20 23:11:21,656 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:21,656 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:11:21,656 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036044697]
[2020-07-20 23:11:21,658 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:11:21,661 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:21,661 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:11:21,661 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:11:21,661 INFO  L87              Difference]: Start difference. First operand 3410 states and 5616 transitions. Second operand 3 states.
[2020-07-20 23:11:22,149 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:22,150 INFO  L93              Difference]: Finished difference Result 9907 states and 16272 transitions.
[2020-07-20 23:11:22,151 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:11:22,151 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 498
[2020-07-20 23:11:22,152 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:22,197 INFO  L225             Difference]: With dead ends: 9907
[2020-07-20 23:11:22,197 INFO  L226             Difference]: Without dead ends: 6726
[2020-07-20 23:11:22,209 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 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 23:11:22,220 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6726 states.
[2020-07-20 23:11:22,500 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 6724.
[2020-07-20 23:11:22,501 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6724 states.
[2020-07-20 23:11:22,530 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 11036 transitions.
[2020-07-20 23:11:22,531 INFO  L78                 Accepts]: Start accepts. Automaton has 6724 states and 11036 transitions. Word has length 498
[2020-07-20 23:11:22,531 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:11:22,532 INFO  L479      AbstractCegarLoop]: Abstraction has 6724 states and 11036 transitions.
[2020-07-20 23:11:22,532 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:11:22,532 INFO  L276                IsEmpty]: Start isEmpty. Operand 6724 states and 11036 transitions.
[2020-07-20 23:11:22,574 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 500
[2020-07-20 23:11:22,575 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:22,575 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:22,789 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:22,790 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:22,790 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:22,791 INFO  L82        PathProgramCache]: Analyzing trace with hash 74932662, now seen corresponding path program 1 times
[2020-07-20 23:11:22,791 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:22,791 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297156812]
[2020-07-20 23:11:22,792 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 23:11:23,269 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:11:23,269 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:23,279 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1899 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:11:23,288 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:23,479 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 23:11:23,479 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:23,480 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297156812]
[2020-07-20 23:11:23,480 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:23,480 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:11:23,480 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993571230]
[2020-07-20 23:11:23,482 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:11:23,482 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:23,482 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:11:23,482 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:11:23,482 INFO  L87              Difference]: Start difference. First operand 6724 states and 11036 transitions. Second operand 3 states.
[2020-07-20 23:11:23,839 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:23,840 INFO  L93              Difference]: Finished difference Result 19916 states and 32645 transitions.
[2020-07-20 23:11:23,840 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:11:23,841 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 499
[2020-07-20 23:11:23,841 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:23,908 INFO  L225             Difference]: With dead ends: 19916
[2020-07-20 23:11:23,909 INFO  L226             Difference]: Without dead ends: 13223
[2020-07-20 23:11:23,927 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 23:11:23,944 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13223 states.
[2020-07-20 23:11:24,319 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13223 to 6750.
[2020-07-20 23:11:24,319 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6750 states.
[2020-07-20 23:11:24,338 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6750 states to 6750 states and 11074 transitions.
[2020-07-20 23:11:24,338 INFO  L78                 Accepts]: Start accepts. Automaton has 6750 states and 11074 transitions. Word has length 499
[2020-07-20 23:11:24,338 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:11:24,338 INFO  L479      AbstractCegarLoop]: Abstraction has 6750 states and 11074 transitions.
[2020-07-20 23:11:24,339 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:11:24,339 INFO  L276                IsEmpty]: Start isEmpty. Operand 6750 states and 11074 transitions.
[2020-07-20 23:11:24,361 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 501
[2020-07-20 23:11:24,362 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:24,362 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:24,576 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:24,577 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:24,577 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:24,577 INFO  L82        PathProgramCache]: Analyzing trace with hash 1851088404, now seen corresponding path program 1 times
[2020-07-20 23:11:24,578 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:24,578 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431421802]
[2020-07-20 23:11:24,578 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 23:11:25,009 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:11:25,010 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:25,016 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1898 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:11:25,027 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:25,329 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 23:11:25,329 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:25,329 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431421802]
[2020-07-20 23:11:25,330 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:25,330 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:11:25,330 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614048691]
[2020-07-20 23:11:25,331 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:11:25,332 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:25,332 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:11:25,332 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:11:25,332 INFO  L87              Difference]: Start difference. First operand 6750 states and 11074 transitions. Second operand 3 states.
[2020-07-20 23:11:25,817 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:25,818 INFO  L93              Difference]: Finished difference Result 19714 states and 32282 transitions.
[2020-07-20 23:11:25,818 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:11:25,818 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 500
[2020-07-20 23:11:25,819 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:25,854 INFO  L225             Difference]: With dead ends: 19714
[2020-07-20 23:11:25,855 INFO  L226             Difference]: Without dead ends: 13276
[2020-07-20 23:11:25,873 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 23:11:25,890 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13276 states.
[2020-07-20 23:11:26,913 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13276 to 13274.
[2020-07-20 23:11:26,913 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13274 states.
[2020-07-20 23:11:26,943 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13274 states to 13274 states and 21693 transitions.
[2020-07-20 23:11:26,944 INFO  L78                 Accepts]: Start accepts. Automaton has 13274 states and 21693 transitions. Word has length 500
[2020-07-20 23:11:26,944 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:11:26,944 INFO  L479      AbstractCegarLoop]: Abstraction has 13274 states and 21693 transitions.
[2020-07-20 23:11:26,945 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:11:26,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 13274 states and 21693 transitions.
[2020-07-20 23:11:26,970 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 501
[2020-07-20 23:11:26,971 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:26,971 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:27,184 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:27,185 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:27,185 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:27,185 INFO  L82        PathProgramCache]: Analyzing trace with hash 444801881, now seen corresponding path program 1 times
[2020-07-20 23:11:27,185 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:27,186 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779291807]
[2020-07-20 23:11:27,186 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 23:11:27,516 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 23:11:27,516 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:27,522 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1449 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:11:27,534 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:27,660 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 23:11:27,660 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:27,661 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779291807]
[2020-07-20 23:11:27,661 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:27,661 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:11:27,661 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575438130]
[2020-07-20 23:11:27,662 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:11:27,662 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:27,662 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:11:27,663 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:11:27,663 INFO  L87              Difference]: Start difference. First operand 13274 states and 21693 transitions. Second operand 3 states.
[2020-07-20 23:11:28,370 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:28,370 INFO  L93              Difference]: Finished difference Result 39686 states and 64847 transitions.
[2020-07-20 23:11:28,371 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:11:28,371 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 500
[2020-07-20 23:11:28,371 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:28,438 INFO  L225             Difference]: With dead ends: 39686
[2020-07-20 23:11:28,439 INFO  L226             Difference]: Without dead ends: 26476
[2020-07-20 23:11:28,471 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 498 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 23:11:28,500 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26476 states.
[2020-07-20 23:11:28,980 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26476 to 13350.
[2020-07-20 23:11:28,980 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13350 states.
[2020-07-20 23:11:29,009 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13350 states to 13350 states and 21799 transitions.
[2020-07-20 23:11:29,010 INFO  L78                 Accepts]: Start accepts. Automaton has 13350 states and 21799 transitions. Word has length 500
[2020-07-20 23:11:29,010 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:11:29,010 INFO  L479      AbstractCegarLoop]: Abstraction has 13350 states and 21799 transitions.
[2020-07-20 23:11:29,010 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:11:29,010 INFO  L276                IsEmpty]: Start isEmpty. Operand 13350 states and 21799 transitions.
[2020-07-20 23:11:29,033 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 502
[2020-07-20 23:11:29,033 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:29,034 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:29,247 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:29,248 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:29,249 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:29,249 INFO  L82        PathProgramCache]: Analyzing trace with hash 397975741, now seen corresponding path program 1 times
[2020-07-20 23:11:29,250 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:29,250 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127096750]
[2020-07-20 23:11:29,251 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 23:11:29,714 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:11:29,714 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:29,724 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1904 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:11:29,735 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:29,998 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 23:11:29,999 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:29,999 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127096750]
[2020-07-20 23:11:29,999 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:30,000 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:11:30,000 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526485915]
[2020-07-20 23:11:30,001 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:11:30,001 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:30,001 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:11:30,002 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:11:30,002 INFO  L87              Difference]: Start difference. First operand 13350 states and 21799 transitions. Second operand 3 states.
[2020-07-20 23:11:30,504 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:30,504 INFO  L93              Difference]: Finished difference Result 39842 states and 65063 transitions.
[2020-07-20 23:11:30,504 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:11:30,504 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 501
[2020-07-20 23:11:30,505 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:30,556 INFO  L225             Difference]: With dead ends: 39842
[2020-07-20 23:11:30,557 INFO  L226             Difference]: Without dead ends: 26568
[2020-07-20 23:11:30,589 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 499 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 23:11:30,617 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26568 states.
[2020-07-20 23:11:31,427 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26568 to 13442.
[2020-07-20 23:11:31,428 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13442 states.
[2020-07-20 23:11:31,453 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13442 states to 13442 states and 21925 transitions.
[2020-07-20 23:11:31,454 INFO  L78                 Accepts]: Start accepts. Automaton has 13442 states and 21925 transitions. Word has length 501
[2020-07-20 23:11:31,454 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:11:31,454 INFO  L479      AbstractCegarLoop]: Abstraction has 13442 states and 21925 transitions.
[2020-07-20 23:11:31,455 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:11:31,455 INFO  L276                IsEmpty]: Start isEmpty. Operand 13442 states and 21925 transitions.
[2020-07-20 23:11:31,475 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 503
[2020-07-20 23:11:31,475 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:31,476 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:31,689 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:31,690 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:31,691 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:31,691 INFO  L82        PathProgramCache]: Analyzing trace with hash 815858906, now seen corresponding path program 1 times
[2020-07-20 23:11:31,691 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:31,692 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017806825]
[2020-07-20 23:11:31,693 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 23:11:32,040 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 23:11:32,040 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:32,044 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1466 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 23:11:32,059 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:32,234 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 23:11:32,235 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:32,235 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017806825]
[2020-07-20 23:11:32,235 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:32,236 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-07-20 23:11:32,237 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423825302]
[2020-07-20 23:11:32,237 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-07-20 23:11:32,238 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:32,238 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-07-20 23:11:32,238 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-07-20 23:11:32,238 INFO  L87              Difference]: Start difference. First operand 13442 states and 21925 transitions. Second operand 9 states.
[2020-07-20 23:11:43,173 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:43,174 INFO  L93              Difference]: Finished difference Result 101669 states and 165041 transitions.
[2020-07-20 23:11:43,174 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. 
[2020-07-20 23:11:43,174 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 502
[2020-07-20 23:11:43,175 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:43,341 INFO  L225             Difference]: With dead ends: 101669
[2020-07-20 23:11:43,341 INFO  L226             Difference]: Without dead ends: 98631
[2020-07-20 23:11:43,379 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=1112, Unknown=0, NotChecked=0, Total=1482
[2020-07-20 23:11:43,488 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98631 states.
[2020-07-20 23:11:45,222 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98631 to 32504.
[2020-07-20 23:11:45,222 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32504 states.
[2020-07-20 23:11:45,265 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32504 states to 32504 states and 52579 transitions.
[2020-07-20 23:11:45,265 INFO  L78                 Accepts]: Start accepts. Automaton has 32504 states and 52579 transitions. Word has length 502
[2020-07-20 23:11:45,266 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:11:45,266 INFO  L479      AbstractCegarLoop]: Abstraction has 32504 states and 52579 transitions.
[2020-07-20 23:11:45,266 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-07-20 23:11:45,266 INFO  L276                IsEmpty]: Start isEmpty. Operand 32504 states and 52579 transitions.
[2020-07-20 23:11:45,302 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 503
[2020-07-20 23:11:45,302 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:45,303 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:45,516 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:45,517 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:45,517 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:45,518 INFO  L82        PathProgramCache]: Analyzing trace with hash -1949345144, now seen corresponding path program 1 times
[2020-07-20 23:11:45,519 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:45,519 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399850316]
[2020-07-20 23:11:45,520 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 23:11:45,929 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:11:45,929 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:45,936 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:11:45,945 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:46,129 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 23:11:46,130 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:46,130 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399850316]
[2020-07-20 23:11:46,131 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:46,131 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:11:46,131 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837352758]
[2020-07-20 23:11:46,132 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:11:46,132 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:46,133 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:11:46,133 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:11:46,133 INFO  L87              Difference]: Start difference. First operand 32504 states and 52579 transitions. Second operand 3 states.
[2020-07-20 23:11:48,026 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:48,026 INFO  L93              Difference]: Finished difference Result 75490 states and 121971 transitions.
[2020-07-20 23:11:48,027 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:11:48,027 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 502
[2020-07-20 23:11:48,027 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:48,112 INFO  L225             Difference]: With dead ends: 75490
[2020-07-20 23:11:48,112 INFO  L226             Difference]: Without dead ends: 47454
[2020-07-20 23:11:48,174 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 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 23:11:48,228 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47454 states.
[2020-07-20 23:11:51,158 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47454 to 41670.
[2020-07-20 23:11:51,158 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 41670 states.
[2020-07-20 23:11:51,231 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41670 states to 41670 states and 67737 transitions.
[2020-07-20 23:11:51,231 INFO  L78                 Accepts]: Start accepts. Automaton has 41670 states and 67737 transitions. Word has length 502
[2020-07-20 23:11:51,232 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:11:51,232 INFO  L479      AbstractCegarLoop]: Abstraction has 41670 states and 67737 transitions.
[2020-07-20 23:11:51,232 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:11:51,232 INFO  L276                IsEmpty]: Start isEmpty. Operand 41670 states and 67737 transitions.
[2020-07-20 23:11:51,253 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 503
[2020-07-20 23:11:51,253 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:11:51,254 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:11:51,454 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:11:51,455 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:11:51,455 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:11:51,456 INFO  L82        PathProgramCache]: Analyzing trace with hash -940914161, now seen corresponding path program 1 times
[2020-07-20 23:11:51,456 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:11:51,457 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819800910]
[2020-07-20 23:11:51,457 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 23:11:51,871 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:11:51,872 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:11:51,878 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:11:51,886 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:11:52,304 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 23:11:52,306 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:11:52,306 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819800910]
[2020-07-20 23:11:52,306 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:11:52,306 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:11:52,306 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793151059]
[2020-07-20 23:11:52,307 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:11:52,307 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:11:52,307 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:11:52,307 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:11:52,308 INFO  L87              Difference]: Start difference. First operand 41670 states and 67737 transitions. Second operand 3 states.
[2020-07-20 23:11:55,392 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:11:55,393 INFO  L93              Difference]: Finished difference Result 122621 states and 199168 transitions.
[2020-07-20 23:11:55,393 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:11:55,393 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 502
[2020-07-20 23:11:55,395 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:11:55,492 INFO  L225             Difference]: With dead ends: 122621
[2020-07-20 23:11:55,492 INFO  L226             Difference]: Without dead ends: 81859
[2020-07-20 23:11:55,545 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 500 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 23:11:55,629 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 81859 states.
[2020-07-20 23:12:00,234 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 81859 to 81857.
[2020-07-20 23:12:00,234 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 81857 states.
[2020-07-20 23:12:00,356 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 81857 states to 81857 states and 132620 transitions.
[2020-07-20 23:12:00,356 INFO  L78                 Accepts]: Start accepts. Automaton has 81857 states and 132620 transitions. Word has length 502
[2020-07-20 23:12:00,357 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:12:00,357 INFO  L479      AbstractCegarLoop]: Abstraction has 81857 states and 132620 transitions.
[2020-07-20 23:12:00,357 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:12:00,357 INFO  L276                IsEmpty]: Start isEmpty. Operand 81857 states and 132620 transitions.
[2020-07-20 23:12:00,408 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 503
[2020-07-20 23:12:00,408 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:12:00,409 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:12:00,622 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:12:00,623 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:12:00,624 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:12:00,624 INFO  L82        PathProgramCache]: Analyzing trace with hash 227329196, now seen corresponding path program 1 times
[2020-07-20 23:12:00,624 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:12:00,625 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533960460]
[2020-07-20 23:12:00,626 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 23:12:01,004 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 23:12:01,004 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:12:01,009 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-20 23:12:01,018 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:12:01,447 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 23:12:01,448 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:12:01,448 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533960460]
[2020-07-20 23:12:01,448 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:12:01,448 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 23:12:01,448 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348611371]
[2020-07-20 23:12:01,449 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 23:12:01,449 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:12:01,449 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 23:12:01,450 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-20 23:12:01,450 INFO  L87              Difference]: Start difference. First operand 81857 states and 132620 transitions. Second operand 4 states.
[2020-07-20 23:12:08,857 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:12:08,857 INFO  L93              Difference]: Finished difference Result 237995 states and 384964 transitions.
[2020-07-20 23:12:08,858 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 23:12:08,858 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 502
[2020-07-20 23:12:08,858 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:12:09,056 INFO  L225             Difference]: With dead ends: 237995
[2020-07-20 23:12:09,056 INFO  L226             Difference]: Without dead ends: 158341
[2020-07-20 23:12:09,131 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 499 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-20 23:12:09,243 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 158341 states.
[2020-07-20 23:12:13,300 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 158341 to 83198.
[2020-07-20 23:12:13,300 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 83198 states.
[2020-07-20 23:12:13,416 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 83198 states to 83198 states and 135004 transitions.
[2020-07-20 23:12:13,417 INFO  L78                 Accepts]: Start accepts. Automaton has 83198 states and 135004 transitions. Word has length 502
[2020-07-20 23:12:13,417 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:12:13,417 INFO  L479      AbstractCegarLoop]: Abstraction has 83198 states and 135004 transitions.
[2020-07-20 23:12:13,417 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 23:12:13,417 INFO  L276                IsEmpty]: Start isEmpty. Operand 83198 states and 135004 transitions.
[2020-07-20 23:12:13,465 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 505
[2020-07-20 23:12:13,466 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:12:13,466 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:12:13,679 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:12:13,680 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:12:13,681 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:12:13,681 INFO  L82        PathProgramCache]: Analyzing trace with hash -980640222, now seen corresponding path program 1 times
[2020-07-20 23:12:13,681 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:12:13,682 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698902138]
[2020-07-20 23:12:13,682 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 23:12:15,789 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:12:15,790 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:12:15,798 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1914 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:12:15,804 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:12:15,952 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 23:12:15,953 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:12:15,953 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698902138]
[2020-07-20 23:12:15,953 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:12:15,956 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:12:15,956 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983897252]
[2020-07-20 23:12:15,957 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:12:15,957 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:12:15,958 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:12:15,958 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:12:15,960 INFO  L87              Difference]: Start difference. First operand 83198 states and 135004 transitions. Second operand 3 states.
[2020-07-20 23:12:22,205 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:12:22,206 INFO  L93              Difference]: Finished difference Result 209826 states and 341182 transitions.
[2020-07-20 23:12:22,208 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:12:22,208 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 504
[2020-07-20 23:12:22,208 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:12:22,401 INFO  L225             Difference]: With dead ends: 209826
[2020-07-20 23:12:22,401 INFO  L226             Difference]: Without dead ends: 136836
[2020-07-20 23:12:22,469 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 502 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 23:12:22,568 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 136836 states.
[2020-07-20 23:12:28,785 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 136836 to 121242.
[2020-07-20 23:12:28,785 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 121242 states.
[2020-07-20 23:12:28,984 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 121242 states to 121242 states and 197508 transitions.
[2020-07-20 23:12:28,985 INFO  L78                 Accepts]: Start accepts. Automaton has 121242 states and 197508 transitions. Word has length 504
[2020-07-20 23:12:28,985 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:12:28,985 INFO  L479      AbstractCegarLoop]: Abstraction has 121242 states and 197508 transitions.
[2020-07-20 23:12:28,985 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:12:28,985 INFO  L276                IsEmpty]: Start isEmpty. Operand 121242 states and 197508 transitions.
[2020-07-20 23:12:29,020 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 506
[2020-07-20 23:12:29,020 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:12:29,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:12:29,221 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:12:29,222 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:12:29,222 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:12:29,222 INFO  L82        PathProgramCache]: Analyzing trace with hash 359846569, now seen corresponding path program 1 times
[2020-07-20 23:12:29,223 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:12:29,223 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013177057]
[2020-07-20 23:12:29,224 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 23:12:29,667 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:12:29,667 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:12:29,675 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1920 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 23:12:29,682 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:12:29,959 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 23:12:29,960 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:12:29,960 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013177057]
[2020-07-20 23:12:29,960 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:12:29,960 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-20 23:12:29,961 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626726035]
[2020-07-20 23:12:29,961 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-20 23:12:29,962 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:12:29,962 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-20 23:12:29,962 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-20 23:12:29,962 INFO  L87              Difference]: Start difference. First operand 121242 states and 197508 transitions. Second operand 4 states.
[2020-07-20 23:12:43,016 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:12:43,016 INFO  L93              Difference]: Finished difference Result 359392 states and 585342 transitions.
[2020-07-20 23:12:43,017 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-20 23:12:43,017 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 505
[2020-07-20 23:12:43,017 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:12:43,366 INFO  L225             Difference]: With dead ends: 359392
[2020-07-20 23:12:43,366 INFO  L226             Difference]: Without dead ends: 239232
[2020-07-20 23:12:43,486 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-20 23:12:43,659 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 239232 states.
[2020-07-20 23:12:59,521 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 239232 to 239230.
[2020-07-20 23:12:59,522 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 239230 states.
[2020-07-20 23:12:59,936 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 239230 states to 239230 states and 388570 transitions.
[2020-07-20 23:12:59,937 INFO  L78                 Accepts]: Start accepts. Automaton has 239230 states and 388570 transitions. Word has length 505
[2020-07-20 23:12:59,937 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:12:59,937 INFO  L479      AbstractCegarLoop]: Abstraction has 239230 states and 388570 transitions.
[2020-07-20 23:12:59,937 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-20 23:12:59,937 INFO  L276                IsEmpty]: Start isEmpty. Operand 239230 states and 388570 transitions.
[2020-07-20 23:13:00,009 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 508
[2020-07-20 23:13:00,009 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:13:00,010 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:13:00,210 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:13:00,211 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:13:00,211 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:13:00,212 INFO  L82        PathProgramCache]: Analyzing trace with hash 304002454, now seen corresponding path program 1 times
[2020-07-20 23:13:00,212 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:13:00,213 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670183442]
[2020-07-20 23:13:00,213 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 23:13:00,560 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 23:13:00,561 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:13:00,565 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:13:00,572 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:13:00,738 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 23:13:00,739 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:13:00,739 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670183442]
[2020-07-20 23:13:00,740 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:13:00,740 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:13:00,740 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077498005]
[2020-07-20 23:13:00,741 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:13:00,742 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:13:00,742 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:13:00,742 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:13:00,743 INFO  L87              Difference]: Start difference. First operand 239230 states and 388570 transitions. Second operand 3 states.
[2020-07-20 23:13:34,029 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:13:34,029 INFO  L93              Difference]: Finished difference Result 705317 states and 1143394 transitions.
[2020-07-20 23:13:34,030 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:13:34,030 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 507
[2020-07-20 23:13:34,030 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:13:34,770 INFO  L225             Difference]: With dead ends: 705317
[2020-07-20 23:13:34,771 INFO  L226             Difference]: Without dead ends: 472288
[2020-07-20 23:13:34,972 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 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 23:13:35,339 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 472288 states.
[2020-07-20 23:13:50,848 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 472288 to 240174.
[2020-07-20 23:13:50,848 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 240174 states.
[2020-07-20 23:13:51,321 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 240174 states to 240174 states and 389965 transitions.
[2020-07-20 23:13:51,322 INFO  L78                 Accepts]: Start accepts. Automaton has 240174 states and 389965 transitions. Word has length 507
[2020-07-20 23:13:51,322 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:13:51,322 INFO  L479      AbstractCegarLoop]: Abstraction has 240174 states and 389965 transitions.
[2020-07-20 23:13:51,322 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:13:51,322 INFO  L276                IsEmpty]: Start isEmpty. Operand 240174 states and 389965 transitions.
[2020-07-20 23:13:51,398 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 508
[2020-07-20 23:13:51,398 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:13:51,399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:13:51,599 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:13:51,600 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:13:51,600 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:13:51,601 INFO  L82        PathProgramCache]: Analyzing trace with hash 920041644, now seen corresponding path program 1 times
[2020-07-20 23:13:51,601 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:13:51,602 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681986746]
[2020-07-20 23:13:51,602 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 23:13:52,740 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:13:52,740 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:13:52,746 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:13:52,751 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:13:52,946 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 23:13:52,946 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:13:52,946 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681986746]
[2020-07-20 23:13:52,946 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:13:52,946 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:13:52,947 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865452704]
[2020-07-20 23:13:52,947 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:13:52,947 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:13:52,947 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:13:52,948 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:13:52,948 INFO  L87              Difference]: Start difference. First operand 240174 states and 389965 transitions. Second operand 3 states.
[2020-07-20 23:14:25,837 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:14:25,837 INFO  L93              Difference]: Finished difference Result 707859 states and 1147984 transitions.
[2020-07-20 23:14:25,837 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:14:25,837 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 507
[2020-07-20 23:14:25,838 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:14:26,656 INFO  L225             Difference]: With dead ends: 707859
[2020-07-20 23:14:26,657 INFO  L226             Difference]: Without dead ends: 471577
[2020-07-20 23:14:26,876 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 505 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 23:14:27,251 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 471577 states.
[2020-07-20 23:15:01,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 471577 to 471575.
[2020-07-20 23:15:01,508 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 471575 states.
[2020-07-20 23:15:02,453 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 471575 states to 471575 states and 762740 transitions.
[2020-07-20 23:15:02,454 INFO  L78                 Accepts]: Start accepts. Automaton has 471575 states and 762740 transitions. Word has length 507
[2020-07-20 23:15:02,454 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:15:02,454 INFO  L479      AbstractCegarLoop]: Abstraction has 471575 states and 762740 transitions.
[2020-07-20 23:15:02,454 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:15:02,455 INFO  L276                IsEmpty]: Start isEmpty. Operand 471575 states and 762740 transitions.
[2020-07-20 23:15:02,616 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 509
[2020-07-20 23:15:02,616 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:15:02,617 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:15:02,817 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:15:02,818 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:15:02,818 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:15:02,819 INFO  L82        PathProgramCache]: Analyzing trace with hash -45068728, now seen corresponding path program 1 times
[2020-07-20 23:15:02,819 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:15:02,820 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990391905]
[2020-07-20 23:15:02,820 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 23:15:03,269 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:15:03,269 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:15:03,280 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:15:03,291 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:15:04,396 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 23:15:04,396 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:15:04,396 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990391905]
[2020-07-20 23:15:04,397 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:15:04,397 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:15:04,397 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878551326]
[2020-07-20 23:15:04,398 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:15:04,398 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:15:04,398 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:15:04,398 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:15:04,399 INFO  L87              Difference]: Start difference. First operand 471575 states and 762740 transitions. Second operand 3 states.
[2020-07-20 23:15:59,385 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:15:59,385 INFO  L93              Difference]: Finished difference Result 1004264 states and 1619332 transitions.
[2020-07-20 23:15:59,386 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:15:59,386 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 508
[2020-07-20 23:15:59,386 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:16:00,617 INFO  L225             Difference]: With dead ends: 1004264
[2020-07-20 23:16:00,617 INFO  L226             Difference]: Without dead ends: 734925
[2020-07-20 23:16:00,952 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 506 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 23:16:01,548 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 734925 states.
[2020-07-20 23:16:43,637 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 734925 to 470079.
[2020-07-20 23:16:43,637 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 470079 states.
[2020-07-20 23:16:44,474 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 470079 states to 470079 states and 760079 transitions.
[2020-07-20 23:16:44,474 INFO  L78                 Accepts]: Start accepts. Automaton has 470079 states and 760079 transitions. Word has length 508
[2020-07-20 23:16:44,474 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:16:44,474 INFO  L479      AbstractCegarLoop]: Abstraction has 470079 states and 760079 transitions.
[2020-07-20 23:16:44,474 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:16:44,475 INFO  L276                IsEmpty]: Start isEmpty. Operand 470079 states and 760079 transitions.
[2020-07-20 23:16:44,618 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 509
[2020-07-20 23:16:44,618 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:16:44,619 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:16:44,819 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:16:44,820 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:16:44,820 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:16:44,821 INFO  L82        PathProgramCache]: Analyzing trace with hash -833023124, now seen corresponding path program 1 times
[2020-07-20 23:16:44,821 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:16:44,821 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250956697]
[2020-07-20 23:16:44,822 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 23:16:45,250 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:16:45,250 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:16:45,257 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1919 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:16:45,262 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:16:45,506 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 23:16:45,506 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:16:45,506 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250956697]
[2020-07-20 23:16:45,506 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:16:45,507 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:16:45,507 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895436073]
[2020-07-20 23:16:45,508 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:16:45,508 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:16:45,508 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:16:45,508 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:16:45,508 INFO  L87              Difference]: Start difference. First operand 470079 states and 760079 transitions. Second operand 3 states.
[2020-07-20 23:17:49,608 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:17:49,608 INFO  L93              Difference]: Finished difference Result 1395250 states and 2255197 transitions.
[2020-07-20 23:17:49,609 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:17:49,609 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 508
[2020-07-20 23:17:49,609 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:17:52,075 INFO  L225             Difference]: With dead ends: 1395250
[2020-07-20 23:17:52,076 INFO  L226             Difference]: Without dead ends: 926828
[2020-07-20 23:17:52,491 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 506 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 23:17:53,177 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 926828 states.
[2020-07-20 23:19:25,794 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 926828 to 926826.
[2020-07-20 23:19:25,794 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 926826 states.
[2020-07-20 23:19:29,295 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 926826 states to 926826 states and 1493341 transitions.
[2020-07-20 23:19:29,296 INFO  L78                 Accepts]: Start accepts. Automaton has 926826 states and 1493341 transitions. Word has length 508
[2020-07-20 23:19:29,296 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 23:19:29,297 INFO  L479      AbstractCegarLoop]: Abstraction has 926826 states and 1493341 transitions.
[2020-07-20 23:19:29,297 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 23:19:29,297 INFO  L276                IsEmpty]: Start isEmpty. Operand 926826 states and 1493341 transitions.
[2020-07-20 23:19:29,592 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 511
[2020-07-20 23:19:29,592 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 23:19:29,592 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 23:19:29,793 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:19:29,794 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 23:19:29,794 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 23:19:29,794 INFO  L82        PathProgramCache]: Analyzing trace with hash 358210033, now seen corresponding path program 1 times
[2020-07-20 23:19:29,795 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 23:19:29,795 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140614751]
[2020-07-20 23:19:29,795 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 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 23:19:30,218 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 23:19:30,218 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 23:19:30,225 INFO  L263         TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 23:19:30,230 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 23:19:30,360 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 23:19:30,361 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 23:19:30,361 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140614751]
[2020-07-20 23:19:30,361 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 23:19:30,361 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 23:19:30,361 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121882101]
[2020-07-20 23:19:30,362 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 23:19:30,362 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 23:19:30,362 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 23:19:30,363 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 23:19:30,363 INFO  L87              Difference]: Start difference. First operand 926826 states and 1493341 transitions. Second operand 3 states.
[2020-07-20 23:21:45,467 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 23:21:45,468 INFO  L93              Difference]: Finished difference Result 2441806 states and 3947295 transitions.
[2020-07-20 23:21:45,468 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 23:21:45,468 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 510
[2020-07-20 23:21:45,469 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 23:21:48,510 INFO  L225             Difference]: With dead ends: 2441806
[2020-07-20 23:21:48,511 INFO  L226             Difference]: Without dead ends: 1598220
[2020-07-20 23:21:49,239 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 509 GetRequests, 508 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 23:21:50,602 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1598220 states.