/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 NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o10.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 13:38:10,980 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 13:38:10,984 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 13:38:11,002 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 13:38:11,003 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 13:38:11,004 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 13:38:11,007 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-07-20 13:38:11,014 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-07-20 13:38:11,019 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 13:38:11,020 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 13:38:11,021 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 13:38:11,023 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 13:38:11,025 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 13:38:11,026 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 13:38:11,028 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 13:38:11,031 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 13:38:11,034 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 13:38:11,035 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 13:38:11,037 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 13:38:11,038 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 13:38:11,042 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 13:38:11,042 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 13:38:11,043 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 13:38:11,044 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 13:38:11,045 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 13:38:11,046 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
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[2020-07-20 13:38:11,052 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-20 13:38:11,053 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 13:38:11,055 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 13:38:11,057 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 13:38:11,078 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 13:38:11,078 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 13:38:11,080 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 13:38:11,080 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 13:38:11,081 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 13:38:11,081 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 13:38:11,081 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 13:38:11,081 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 13:38:11,082 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 13:38:11,082 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 13:38:11,082 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 13:38:11,082 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 13:38:11,083 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 13:38:11,083 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 13:38:11,083 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 13:38:11,083 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 13:38:11,084 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 13:38:11,084 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 13:38:11,084 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 13:38:11,084 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 13:38:11,085 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 13:38:11,085 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 13:38:11,085 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 13:38:11,085 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 13:38:11,086 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 13:38:11,086 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 13:38:11,086 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:38:11,086 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 13:38:11,086 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 13:38:11,087 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 -> NUM_FUNCTIONS
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 13:38:11,495 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 13:38:11,528 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 13:38:11,534 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 13:38:11,537 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 13:38:11,538 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 13:38:11,541 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c
[2020-07-20 13:38:11,669 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b1b1174c/a37487a1110f4f76876ac90a83eae4e7/FLAGe22a6710e
[2020-07-20 13:38:12,415 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 13:38:12,417 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o10.c
[2020-07-20 13:38:12,432 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b1b1174c/a37487a1110f4f76876ac90a83eae4e7/FLAGe22a6710e
[2020-07-20 13:38:12,756 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b1b1174c/a37487a1110f4f76876ac90a83eae4e7
[2020-07-20 13:38:12,774 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 13:38:12,779 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 13:38:12,785 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 13:38:12,787 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 13:38:12,793 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 13:38:12,794 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:38:12" (1/1) ...
[2020-07-20 13:38:12,799 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b0daa1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:12, skipping insertion in model container
[2020-07-20 13:38:12,800 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 01:38:12" (1/1) ...
[2020-07-20 13:38:12,812 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 13:38:12,836 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 13:38:13,053 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:38:13,061 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 13:38:13,084 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 13:38:13,109 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 13:38:13,110 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13 WrapperNode
[2020-07-20 13:38:13,110 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 13:38:13,112 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 13:38:13,112 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 13:38:13,112 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 13:38:13,134 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13" (1/1) ...
[2020-07-20 13:38:13,134 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13" (1/1) ...
[2020-07-20 13:38:13,142 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13" (1/1) ...
[2020-07-20 13:38:13,142 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13" (1/1) ...
[2020-07-20 13:38:13,148 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13" (1/1) ...
[2020-07-20 13:38:13,151 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13" (1/1) ...
[2020-07-20 13:38:13,153 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13" (1/1) ...
[2020-07-20 13:38:13,156 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 13:38:13,157 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 13:38:13,157 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 13:38:13,157 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 13:38:13,159 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13" (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 13:38:13,369 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 13:38:13,369 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 13:38:13,370 INFO  L138     BoogieDeclarations]: Found implementation of procedure id
[2020-07-20 13:38:13,370 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 13:38:13,370 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-07-20 13:38:13,370 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 13:38:13,371 INFO  L130     BoogieDeclarations]: Found specification of procedure id
[2020-07-20 13:38:13,371 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 13:38:13,371 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 13:38:13,372 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 13:38:13,616 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 13:38:13,616 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 13:38:13,622 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:38:13 BoogieIcfgContainer
[2020-07-20 13:38:13,623 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 13:38:13,625 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 13:38:13,625 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 13:38:13,629 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 13:38:13,630 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 01:38:12" (1/3) ...
[2020-07-20 13:38:13,632 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46166f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:38:13, skipping insertion in model container
[2020-07-20 13:38:13,632 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 01:38:13" (2/3) ...
[2020-07-20 13:38:13,633 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46166f04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 01:38:13, skipping insertion in model container
[2020-07-20 13:38:13,633 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 01:38:13" (3/3) ...
[2020-07-20 13:38:13,636 INFO  L109   eAbstractionObserver]: Analyzing ICFG id_o10.c
[2020-07-20 13:38:13,653 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 13:38:13,665 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 13:38:13,688 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 13:38:13,724 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 13:38:13,725 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 13:38:13,725 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 13:38:13,725 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 13:38:13,725 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 13:38:13,725 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 13:38:13,726 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 13:38:13,726 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 13:38:13,748 INFO  L276                IsEmpty]: Start isEmpty. Operand 20 states.
[2020-07-20 13:38:13,759 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-07-20 13:38:13,760 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:38:13,762 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:38:13,762 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:38:13,772 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:38:13,773 INFO  L82        PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times
[2020-07-20 13:38:13,784 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:38:13,785 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459560718]
[2020-07-20 13:38:13,785 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 13:38:13,880 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 13:38:13,881 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:38:13,885 INFO  L263         TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 13:38:13,895 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:38:14,040 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 13:38:14,041 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 13:38:14,043 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459560718]
[2020-07-20 13:38:14,045 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 13:38:14,046 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 13:38:14,048 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088619069]
[2020-07-20 13:38:14,057 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 13:38:14,058 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:38:14,077 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 13:38:14,078 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 13:38:14,084 INFO  L87              Difference]: Start difference. First operand 20 states. Second operand 5 states.
[2020-07-20 13:38:14,165 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:38:14,165 INFO  L93              Difference]: Finished difference Result 32 states and 35 transitions.
[2020-07-20 13:38:14,167 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-20 13:38:14,169 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-07-20 13:38:14,170 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:38:14,187 INFO  L225             Difference]: With dead ends: 32
[2020-07-20 13:38:14,188 INFO  L226             Difference]: Without dead ends: 18
[2020-07-20 13:38:14,193 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 13:38:14,219 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2020-07-20 13:38:14,255 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2020-07-20 13:38:14,257 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2020-07-20 13:38:14,259 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions.
[2020-07-20 13:38:14,262 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13
[2020-07-20 13:38:14,263 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:38:14,263 INFO  L479      AbstractCegarLoop]: Abstraction has 18 states and 19 transitions.
[2020-07-20 13:38:14,263 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 13:38:14,264 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions.
[2020-07-20 13:38:14,266 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-20 13:38:14,267 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:38:14,267 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:38:14,481 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:38:14,482 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:38:14,482 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:38:14,483 INFO  L82        PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times
[2020-07-20 13:38:14,483 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:38:14,484 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556390331]
[2020-07-20 13:38:14,484 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 13:38:14,532 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:38:14,532 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:38:14,534 INFO  L263         TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-07-20 13:38:14,537 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:38:14,613 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-20 13:38:14,614 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:38:14,892 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-20 13:38:14,893 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556390331]
[2020-07-20 13:38:14,893 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:38:14,894 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12
[2020-07-20 13:38:14,894 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210711901]
[2020-07-20 13:38:14,897 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 13:38:14,897 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:38:14,898 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 13:38:14,898 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132
[2020-07-20 13:38:14,898 INFO  L87              Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 12 states.
[2020-07-20 13:38:15,000 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:38:15,000 INFO  L93              Difference]: Finished difference Result 30 states and 32 transitions.
[2020-07-20 13:38:15,001 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-07-20 13:38:15,002 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 19
[2020-07-20 13:38:15,002 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:38:15,003 INFO  L225             Difference]: With dead ends: 30
[2020-07-20 13:38:15,003 INFO  L226             Difference]: Without dead ends: 24
[2020-07-20 13:38:15,007 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132
[2020-07-20 13:38:15,011 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-07-20 13:38:15,027 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2020-07-20 13:38:15,028 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-07-20 13:38:15,033 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions.
[2020-07-20 13:38:15,034 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 19
[2020-07-20 13:38:15,035 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:38:15,035 INFO  L479      AbstractCegarLoop]: Abstraction has 24 states and 25 transitions.
[2020-07-20 13:38:15,035 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 13:38:15,037 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions.
[2020-07-20 13:38:15,040 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-07-20 13:38:15,041 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:38:15,042 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:38:15,257 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:38:15,258 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:38:15,258 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:38:15,259 INFO  L82        PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 2 times
[2020-07-20 13:38:15,259 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:38:15,259 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025892528]
[2020-07-20 13:38:15,260 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 13:38:15,325 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:38:15,326 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:38:15,328 INFO  L263         TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-07-20 13:38:15,332 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:38:15,471 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-20 13:38:15,472 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:38:16,089 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-20 13:38:16,091 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025892528]
[2020-07-20 13:38:16,091 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:38:16,091 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20
[2020-07-20 13:38:16,092 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409747607]
[2020-07-20 13:38:16,093 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-07-20 13:38:16,093 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:38:16,094 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-07-20 13:38:16,094 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380
[2020-07-20 13:38:16,094 INFO  L87              Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 20 states.
[2020-07-20 13:38:16,570 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:38:16,571 INFO  L93              Difference]: Finished difference Result 42 states and 46 transitions.
[2020-07-20 13:38:16,571 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-07-20 13:38:16,571 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 31
[2020-07-20 13:38:16,572 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:38:16,573 INFO  L225             Difference]: With dead ends: 42
[2020-07-20 13:38:16,574 INFO  L226             Difference]: Without dead ends: 36
[2020-07-20 13:38:16,575 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552
[2020-07-20 13:38:16,576 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 36 states.
[2020-07-20 13:38:16,584 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36.
[2020-07-20 13:38:16,585 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 36 states.
[2020-07-20 13:38:16,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions.
[2020-07-20 13:38:16,587 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31
[2020-07-20 13:38:16,588 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:38:16,588 INFO  L479      AbstractCegarLoop]: Abstraction has 36 states and 37 transitions.
[2020-07-20 13:38:16,588 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-07-20 13:38:16,588 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions.
[2020-07-20 13:38:16,590 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2020-07-20 13:38:16,590 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:38:16,591 INFO  L422         BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:38:16,801 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:38:16,802 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:38:16,802 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:38:16,803 INFO  L82        PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 3 times
[2020-07-20 13:38:16,803 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:38:16,803 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705325693]
[2020-07-20 13:38:16,804 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 13:38:16,915 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:38:16,915 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 13:38:16,917 INFO  L263         TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 35 conjunts are in the unsatisfiable core
[2020-07-20 13:38:16,929 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 13:38:17,244 INFO  L134       CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked.
[2020-07-20 13:38:17,245 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 13:38:21,029 INFO  L134       CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked.
[2020-07-20 13:38:21,030 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705325693]
[2020-07-20 13:38:21,031 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 13:38:21,031 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36
[2020-07-20 13:38:21,034 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325548609]
[2020-07-20 13:38:21,036 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 36 states
[2020-07-20 13:38:21,036 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 13:38:21,037 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2020-07-20 13:38:21,038 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1100, Unknown=1, NotChecked=0, Total=1260
[2020-07-20 13:38:21,038 INFO  L87              Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 36 states.
[2020-07-20 13:38:23,678 WARN  L193               SmtUtils]: Spent 2.11 s on a formula simplification that was a NOOP. DAG size: 11
[2020-07-20 13:38:23,740 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 13:38:23,740 INFO  L93              Difference]: Finished difference Result 51 states and 54 transitions.
[2020-07-20 13:38:23,742 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-07-20 13:38:23,742 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states. Word has length 55
[2020-07-20 13:38:23,743 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 13:38:23,745 INFO  L225             Difference]: With dead ends: 51
[2020-07-20 13:38:23,745 INFO  L226             Difference]: Without dead ends: 45
[2020-07-20 13:38:23,747 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=182, Invalid=1223, Unknown=1, NotChecked=0, Total=1406
[2020-07-20 13:38:23,748 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 45 states.
[2020-07-20 13:38:23,756 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45.
[2020-07-20 13:38:23,757 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 45 states.
[2020-07-20 13:38:23,758 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions.
[2020-07-20 13:38:23,759 INFO  L78                 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 55
[2020-07-20 13:38:23,759 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 13:38:23,760 INFO  L479      AbstractCegarLoop]: Abstraction has 45 states and 46 transitions.
[2020-07-20 13:38:23,760 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 36 states.
[2020-07-20 13:38:23,760 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions.
[2020-07-20 13:38:23,763 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 74
[2020-07-20 13:38:23,763 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 13:38:23,763 INFO  L422         BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 13:38:23,969 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:38:23,970 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 13:38:23,971 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 13:38:23,971 INFO  L82        PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 4 times
[2020-07-20 13:38:23,972 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 13:38:23,973 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531963209]
[2020-07-20 13:38:23,973 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 13:38:24,278 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 13:38:24,279 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 13:38:24,279 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:38:24,553 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 13:38:24,553 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 13:38:24,594 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 13:38:24,595 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 13:38:24,796 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 13:38:24,840 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 01:38:24 BoogieIcfgContainer
[2020-07-20 13:38:24,840 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 13:38:24,843 INFO  L168              Benchmark]: Toolchain (without parser) took 12066.87 ms. Allocated memory was 143.7 MB in the beginning and 250.6 MB in the end (delta: 107.0 MB). Free memory was 101.7 MB in the beginning and 155.0 MB in the end (delta: -53.4 MB). Peak memory consumption was 53.6 MB. Max. memory is 7.1 GB.
[2020-07-20 13:38:24,844 INFO  L168              Benchmark]: CDTParser took 1.25 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
[2020-07-20 13:38:24,845 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 325.70 ms. Allocated memory is still 143.7 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
[2020-07-20 13:38:24,846 INFO  L168              Benchmark]: Boogie Preprocessor took 44.18 ms. Allocated memory is still 143.7 MB. Free memory was 92.1 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-07-20 13:38:24,847 INFO  L168              Benchmark]: RCFGBuilder took 466.30 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 90.7 MB in the beginning and 170.4 MB in the end (delta: -79.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
[2020-07-20 13:38:24,848 INFO  L168              Benchmark]: TraceAbstraction took 11215.63 ms. Allocated memory was 201.9 MB in the beginning and 250.6 MB in the end (delta: 48.8 MB). Free memory was 170.4 MB in the beginning and 155.0 MB in the end (delta: 15.3 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB.
[2020-07-20 13:38:24,854 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 1.25 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 325.70 ms. Allocated memory is still 143.7 MB. Free memory was 101.3 MB in the beginning and 92.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 44.18 ms. Allocated memory is still 143.7 MB. Free memory was 92.1 MB in the beginning and 90.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 466.30 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 90.7 MB in the beginning and 170.4 MB in the end (delta: -79.7 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 11215.63 ms. Allocated memory was 201.9 MB in the beginning and 250.6 MB in the end (delta: 48.8 MB). Free memory was 170.4 MB in the beginning and 155.0 MB in the end (delta: 15.3 MB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L10]              unsigned int input = __VERIFIER_nondet_uint();
[L11]  CALL, EXPR  id(input)
       VAL         [\old(x)=10]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=10, x=10]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=9]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=9, x=9]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=8]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=8, x=8]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=7]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=7, x=7]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=6]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=6, x=6]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=5]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=5, x=5]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=4]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=4, x=4]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=3]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=3, x=3]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=2]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=2, x=2]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=1]
[L5]   COND FALSE  !(x==0)
       VAL         [\old(x)=1, x=1]
[L6]   CALL, EXPR  id(x-1)
       VAL         [\old(x)=0]
[L5]   COND TRUE   x==0
[L5]               return 0;
       VAL         [\old(x)=0, \result=0, x=0]
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=1, id(x-1)=0, x=1]
[L6]               return id(x-1) + 1;
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=2, id(x-1)=1, x=2]
[L6]               return id(x-1) + 1;
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=3, id(x-1)=2, x=3]
[L6]               return id(x-1) + 1;
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=4, id(x-1)=3, x=4]
[L6]               return id(x-1) + 1;
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=5, id(x-1)=4, x=5]
[L6]               return id(x-1) + 1;
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=6, id(x-1)=5, x=6]
[L6]               return id(x-1) + 1;
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=7, id(x-1)=6, x=7]
[L6]               return id(x-1) + 1;
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=8, id(x-1)=7, x=8]
[L6]               return id(x-1) + 1;
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=9, id(x-1)=8, x=9]
[L6]               return id(x-1) + 1;
[L6]   RET, EXPR   id(x-1)
       VAL         [\old(x)=10, id(x-1)=9, x=10]
[L6]               return id(x-1) + 1;
[L11]  RET, EXPR   id(input)
       VAL         [id(input)=10, input=10]
[L11]              unsigned int result = id(input);
[L12]  COND TRUE   result == 10
       VAL         [input=10, result=10]
[L13]              __VERIFIER_error()
       VAL         [input=10, result=10]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.0s, OverallIterations: 5, TraceHistogramMax: 11, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 86 SDtfs, 2 SDslu, 871 SDs, 0 SdLazy, 316 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 225 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 191 NumberOfCodeBlocks, 190 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 216 ConstructedInterpolants, 0 QuantifiedInterpolants, 22632 SizeOfPredicates, 4 NumberOfNonLiveVariables, 251 ConjunctsInSsa, 72 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 188/376 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...