/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/loop-acceleration/phases_2-2.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 22:20:22,501 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 22:20:22,504 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 22:20:22,519 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 22:20:22,519 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 22:20:22,520 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 22:20:22,522 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 22:20:22,524 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 22:20:22,525 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 22:20:22,526 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 22:20:22,527 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 22:20:22,528 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 22:20:22,529 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 22:20:22,530 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 22:20:22,531 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 22:20:22,532 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 22:20:22,533 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 22:20:22,534 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 22:20:22,536 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 22:20:22,538 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 22:20:22,540 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 22:20:22,541 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 22:20:22,542 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 22:20:22,543 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 22:20:22,546 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 22:20:22,546 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 22:20:22,546 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 22:20:22,547 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 22:20:22,548 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 22:20:22,549 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 22:20:22,549 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-20 22:20:22,550 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 22:20:22,551 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 22:20:22,552 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 22:20:22,552 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 22:20:22,553 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-07-20 22:20:22,554 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 22:20:22,555 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 22:20:22,556 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 22:20:22,572 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 22:20:22,572 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 22:20:22,574 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 22:20:22,574 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 22:20:22,574 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 22:20:22,574 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 22:20:22,574 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 22:20:22,575 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 22:20:22,575 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 22:20:22,575 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 22:20:22,575 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 22:20:22,575 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 22:20:22,576 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 22:20:22,576 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 22:20:22,576 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 22:20:22,576 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 22:20:22,576 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 22:20:22,577 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 22:20:22,577 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 22:20:22,577 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 22:20:22,577 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 22:20:22,578 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 22:20:22,578 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 22:20:22,578 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 22:20:22,578 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 22:20:22,578 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 22:20:22,579 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:20:22,579 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 22:20:22,579 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 22:20:22,579 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 22:20:22,882 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 22:20:22,897 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 22:20:22,901 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 22:20:22,903 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 22:20:22,903 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 22:20:22,904 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-2.c
[2020-07-20 22:20:22,976 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2dbe7680/cce0d3acefac4e6b9b30541a29b78ff2/FLAGa6d21fa4b
[2020-07-20 22:20:23,479 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 22:20:23,480 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_2-2.c
[2020-07-20 22:20:23,488 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2dbe7680/cce0d3acefac4e6b9b30541a29b78ff2/FLAGa6d21fa4b
[2020-07-20 22:20:23,882 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2dbe7680/cce0d3acefac4e6b9b30541a29b78ff2
[2020-07-20 22:20:23,892 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 22:20:23,895 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 22:20:23,896 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 22:20:23,897 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 22:20:23,900 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 22:20:23,902 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:20:23" (1/1) ...
[2020-07-20 22:20:23,905 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e6d448f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:23, skipping insertion in model container
[2020-07-20 22:20:23,905 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:20:23" (1/1) ...
[2020-07-20 22:20:23,913 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 22:20:23,932 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 22:20:24,115 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 22:20:24,120 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 22:20:24,137 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 22:20:24,153 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 22:20:24,153 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24 WrapperNode
[2020-07-20 22:20:24,154 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 22:20:24,155 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 22:20:24,155 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 22:20:24,155 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 22:20:24,170 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24" (1/1) ...
[2020-07-20 22:20:24,170 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24" (1/1) ...
[2020-07-20 22:20:24,176 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24" (1/1) ...
[2020-07-20 22:20:24,177 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24" (1/1) ...
[2020-07-20 22:20:24,181 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24" (1/1) ...
[2020-07-20 22:20:24,187 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24" (1/1) ...
[2020-07-20 22:20:24,188 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24" (1/1) ...
[2020-07-20 22:20:24,275 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 22:20:24,279 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 22:20:24,279 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 22:20:24,279 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 22:20:24,280 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24" (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 22:20:24,355 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 22:20:24,355 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 22:20:24,355 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 22:20:24,355 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 22:20:24,356 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 22:20:24,356 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 22:20:24,356 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 22:20:24,356 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 22:20:24,356 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-07-20 22:20:24,356 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 22:20:24,357 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 22:20:24,357 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 22:20:24,357 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 22:20:24,587 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 22:20:24,587 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 22:20:24,591 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:20:24 BoogieIcfgContainer
[2020-07-20 22:20:24,591 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 22:20:24,592 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 22:20:24,592 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 22:20:24,596 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 22:20:24,596 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:20:23" (1/3) ...
[2020-07-20 22:20:24,597 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696909f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:20:24, skipping insertion in model container
[2020-07-20 22:20:24,597 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:20:24" (2/3) ...
[2020-07-20 22:20:24,598 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@696909f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:20:24, skipping insertion in model container
[2020-07-20 22:20:24,598 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:20:24" (3/3) ...
[2020-07-20 22:20:24,600 INFO  L109   eAbstractionObserver]: Analyzing ICFG phases_2-2.c
[2020-07-20 22:20:24,612 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 22:20:24,620 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 22:20:24,636 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 22:20:24,663 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 22:20:24,663 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 22:20:24,664 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 22:20:24,664 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 22:20:24,664 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 22:20:24,664 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 22:20:24,665 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 22:20:24,665 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 22:20:24,693 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states.
[2020-07-20 22:20:24,701 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-07-20 22:20:24,701 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 22:20:24,702 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 22:20:24,703 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 22:20:24,717 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 22:20:24,717 INFO  L82        PathProgramCache]: Analyzing trace with hash 900249630, now seen corresponding path program 1 times
[2020-07-20 22:20:24,739 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 22:20:24,739 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821641793]
[2020-07-20 22:20:24,740 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 22:20:24,852 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 22:20:24,853 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 22:20:24,855 INFO  L263         TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 22:20:24,871 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 22:20:24,900 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 22:20:24,901 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 22:20:24,902 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821641793]
[2020-07-20 22:20:24,903 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 22:20:24,904 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 22:20:24,905 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533398342]
[2020-07-20 22:20:24,911 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 22:20:24,912 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 22:20:24,925 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 22:20:24,926 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 22:20:24,929 INFO  L87              Difference]: Start difference. First operand 19 states. Second operand 2 states.
[2020-07-20 22:20:24,956 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 22:20:24,957 INFO  L93              Difference]: Finished difference Result 30 states and 35 transitions.
[2020-07-20 22:20:24,957 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-20 22:20:24,958 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 11
[2020-07-20 22:20:24,959 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 22:20:24,969 INFO  L225             Difference]: With dead ends: 30
[2020-07-20 22:20:24,970 INFO  L226             Difference]: Without dead ends: 13
[2020-07-20 22:20:24,974 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 22:20:24,996 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2020-07-20 22:20:25,015 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2020-07-20 22:20:25,017 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13 states.
[2020-07-20 22:20:25,018 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions.
[2020-07-20 22:20:25,020 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11
[2020-07-20 22:20:25,021 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 22:20:25,021 INFO  L479      AbstractCegarLoop]: Abstraction has 13 states and 14 transitions.
[2020-07-20 22:20:25,021 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 22:20:25,021 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions.
[2020-07-20 22:20:25,022 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-07-20 22:20:25,022 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 22:20:25,022 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 22:20:25,237 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:20:25,238 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 22:20:25,238 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 22:20:25,239 INFO  L82        PathProgramCache]: Analyzing trace with hash 891014420, now seen corresponding path program 1 times
[2020-07-20 22:20:25,239 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 22:20:25,240 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113563280]
[2020-07-20 22:20:25,241 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 22:20:25,272 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 22:20:25,272 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 22:20:25,273 INFO  L263         TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 22:20:25,275 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 22:20:25,363 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 22:20:25,416 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 22:20:25,416 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 22:20:25,417 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113563280]
[2020-07-20 22:20:25,417 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 22:20:25,417 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-07-20 22:20:25,418 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362256139]
[2020-07-20 22:20:25,419 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 22:20:25,420 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 22:20:25,420 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 22:20:25,421 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-07-20 22:20:25,421 INFO  L87              Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states.
[2020-07-20 22:20:25,507 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 22:20:25,507 INFO  L93              Difference]: Finished difference Result 20 states and 22 transitions.
[2020-07-20 22:20:25,507 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 22:20:25,508 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 11
[2020-07-20 22:20:25,508 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 22:20:25,509 INFO  L225             Difference]: With dead ends: 20
[2020-07-20 22:20:25,509 INFO  L226             Difference]: Without dead ends: 15
[2020-07-20 22:20:25,510 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2020-07-20 22:20:25,511 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2020-07-20 22:20:25,514 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2020-07-20 22:20:25,515 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2020-07-20 22:20:25,515 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions.
[2020-07-20 22:20:25,516 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11
[2020-07-20 22:20:25,516 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 22:20:25,516 INFO  L479      AbstractCegarLoop]: Abstraction has 15 states and 17 transitions.
[2020-07-20 22:20:25,516 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 22:20:25,517 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions.
[2020-07-20 22:20:25,517 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-07-20 22:20:25,518 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 22:20:25,518 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 22:20:25,725 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:20:25,726 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 22:20:25,728 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 22:20:25,729 INFO  L82        PathProgramCache]: Analyzing trace with hash -1596010865, now seen corresponding path program 1 times
[2020-07-20 22:20:25,729 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 22:20:25,730 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075038564]
[2020-07-20 22:20:25,730 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 22:20:25,764 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 22:20:25,765 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 22:20:25,768 INFO  L263         TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-07-20 22:20:25,770 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 22:20:25,848 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 22:20:25,893 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 22:20:25,894 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 22:20:25,938 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 22:20:26,056 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 22:20:26,057 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075038564]
[2020-07-20 22:20:26,061 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2020-07-20 22:20:26,062 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 11
[2020-07-20 22:20:26,065 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306384409]
[2020-07-20 22:20:26,065 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 22:20:26,066 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 22:20:26,066 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 22:20:26,067 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2020-07-20 22:20:26,067 INFO  L87              Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 7 states.
[2020-07-20 22:20:32,386 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 22:20:32,386 INFO  L93              Difference]: Finished difference Result 21 states and 23 transitions.
[2020-07-20 22:20:32,387 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 22:20:32,387 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 13
[2020-07-20 22:20:32,388 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 22:20:32,388 INFO  L225             Difference]: With dead ends: 21
[2020-07-20 22:20:32,388 INFO  L226             Difference]: Without dead ends: 16
[2020-07-20 22:20:32,389 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156
[2020-07-20 22:20:32,390 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2020-07-20 22:20:32,393 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2020-07-20 22:20:32,393 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2020-07-20 22:20:32,394 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions.
[2020-07-20 22:20:32,394 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13
[2020-07-20 22:20:32,395 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 22:20:32,395 INFO  L479      AbstractCegarLoop]: Abstraction has 16 states and 18 transitions.
[2020-07-20 22:20:32,395 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 22:20:32,395 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions.
[2020-07-20 22:20:32,396 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-20 22:20:32,396 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 22:20:32,396 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 22:20:32,597 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 22:20:32,598 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 22:20:32,598 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 22:20:32,598 INFO  L82        PathProgramCache]: Analyzing trace with hash 612215820, now seen corresponding path program 1 times
[2020-07-20 22:20:32,599 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 22:20:32,600 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575048007]
[2020-07-20 22:20:32,600 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