/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c


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


This is Ultimate 0.1.25-3af5e1f
[2020-09-04 13:19:25,658 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2020-09-04 13:19:25,761 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-04 13:19:25,792 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-04 13:19:25,793 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-04 13:19:25,795 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-04 13:19:25,795 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-04 13:19:25,795 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-04 13:19:25,796 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-04 13:19:25,796 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-04 13:19:25,796 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-04 13:19:25,796 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-04 13:19:25,797 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-04 13:19:25,797 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-04 13:19:25,797 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-04 13:19:25,797 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-04 13:19:25,798 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-04 13:19:25,798 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-04 13:19:25,798 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-04 13:19:25,798 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-04 13:19:25,799 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-04 13:19:25,799 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-04 13:19:25,799 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-04 13:19:25,800 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-04 13:19:25,800 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-04 13:19:25,800 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-04 13:19:25,800 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-04 13:19:25,801 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-04 13:19:25,801 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-04 13:19:25,801 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-04 13:19:25,801 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-04 13:19:25,802 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-04 13:19:25,802 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2020-09-04 13:19:26,359 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-04 13:19:26,390 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-04 13:19:26,396 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-04 13:19:26,398 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-04 13:19:26,399 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-04 13:19:26,401 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c
[2020-09-04 13:19:26,513 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5eef45b97/25fdde60b4c64d3b8d9ae759a735eae8/FLAG570d6c96d
[2020-09-04 13:19:27,171 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-04 13:19:27,172 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c
[2020-09-04 13:19:27,183 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5eef45b97/25fdde60b4c64d3b8d9ae759a735eae8/FLAG570d6c96d
[2020-09-04 13:19:27,502 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5eef45b97/25fdde60b4c64d3b8d9ae759a735eae8
[2020-09-04 13:19:27,519 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-04 13:19:27,522 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-04 13:19:27,524 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-04 13:19:27,524 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-04 13:19:27,529 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-04 13:19:27,531 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:19:27" (1/1) ...
[2020-09-04 13:19:27,536 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155d8a11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27, skipping insertion in model container
[2020-09-04 13:19:27,537 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:19:27" (1/1) ...
[2020-09-04 13:19:27,548 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-04 13:19:27,578 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-04 13:19:27,906 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-04 13:19:27,921 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-04 13:19:27,957 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-04 13:19:27,985 INFO  L208         MainTranslator]: Completed translation
[2020-09-04 13:19:27,987 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27 WrapperNode
[2020-09-04 13:19:27,988 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-04 13:19:27,989 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-04 13:19:27,990 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-04 13:19:27,991 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-04 13:19:28,012 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ...
[2020-09-04 13:19:28,016 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ...
[2020-09-04 13:19:28,163 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ...
[2020-09-04 13:19:28,163 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ...
[2020-09-04 13:19:28,184 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ...
[2020-09-04 13:19:28,191 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ...
[2020-09-04 13:19:28,194 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ...
[2020-09-04 13:19:28,205 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-04 13:19:28,206 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-04 13:19:28,206 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-04 13:19:28,206 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-04 13:19:28,208 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/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
[2020-09-04 13:19:28,307 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-04 13:19:28,308 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-04 13:19:28,308 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo1
[2020-09-04 13:19:28,309 INFO  L138     BoogieDeclarations]: Found implementation of procedure fibo2
[2020-09-04 13:19:28,309 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-04 13:19:28,309 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-04 13:19:28,309 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-04 13:19:28,310 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo1
[2020-09-04 13:19:28,310 INFO  L130     BoogieDeclarations]: Found specification of procedure fibo2
[2020-09-04 13:19:28,310 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-04 13:19:28,310 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-04 13:19:28,310 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-04 13:19:28,585 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-04 13:19:28,585 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-04 13:19:28,593 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:19:28 BoogieIcfgContainer
[2020-09-04 13:19:28,593 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-04 13:19:28,596 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-04 13:19:28,596 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-04 13:19:28,602 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-04 13:19:28,603 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:19:27" (1/3) ...
[2020-09-04 13:19:28,605 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544c608e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:19:28, skipping insertion in model container
[2020-09-04 13:19:28,605 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:19:27" (2/3) ...
[2020-09-04 13:19:28,605 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@544c608e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:19:28, skipping insertion in model container
[2020-09-04 13:19:28,606 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:19:28" (3/3) ...
[2020-09-04 13:19:28,609 INFO  L109   eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c
[2020-09-04 13:19:28,626 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-09-04 13:19:28,644 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-04 13:19:28,675 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-04 13:19:28,744 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-04 13:19:28,745 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-04 13:19:28,745 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-09-04 13:19:28,745 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-04 13:19:28,746 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-04 13:19:28,746 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-04 13:19:28,746 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-04 13:19:28,746 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-04 13:19:28,782 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states.
[2020-09-04 13:19:28,791 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-09-04 13:19:28,792 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:28,793 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:28,794 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:28,803 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:28,803 INFO  L82        PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times
[2020-09-04 13:19:28,824 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:28,838 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617520064]
[2020-09-04 13:19:28,839 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:28,987 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,096 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:29,098 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,105 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:29,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,172 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-04 13:19:29,174 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617520064]
[2020-09-04 13:19:29,175 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-04 13:19:29,175 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-04 13:19:29,177 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240201650]
[2020-09-04 13:19:29,186 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-04 13:19:29,187 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:29,207 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-04 13:19:29,209 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-04 13:19:29,212 INFO  L87              Difference]: Start difference. First operand 33 states. Second operand 5 states.
[2020-09-04 13:19:29,362 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:29,363 INFO  L93              Difference]: Finished difference Result 44 states and 53 transitions.
[2020-09-04 13:19:29,364 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-04 13:19:29,366 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-09-04 13:19:29,367 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:29,383 INFO  L225             Difference]: With dead ends: 44
[2020-09-04 13:19:29,384 INFO  L226             Difference]: Without dead ends: 30
[2020-09-04 13:19:29,390 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-04 13:19:29,417 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-09-04 13:19:29,454 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-09-04 13:19:29,457 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-09-04 13:19:29,459 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions.
[2020-09-04 13:19:29,462 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13
[2020-09-04 13:19:29,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:29,463 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 37 transitions.
[2020-09-04 13:19:29,463 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-04 13:19:29,463 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions.
[2020-09-04 13:19:29,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-09-04 13:19:29,466 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:29,467 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:29,468 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-04 13:19:29,468 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:29,469 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:29,469 INFO  L82        PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times
[2020-09-04 13:19:29,470 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:29,470 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49082943]
[2020-09-04 13:19:29,470 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:29,484 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,516 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:29,518 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,524 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:29,535 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,567 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-04 13:19:29,568 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49082943]
[2020-09-04 13:19:29,569 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-04 13:19:29,569 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-04 13:19:29,570 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092237698]
[2020-09-04 13:19:29,572 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-04 13:19:29,573 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:29,573 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-04 13:19:29,574 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-04 13:19:29,574 INFO  L87              Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states.
[2020-09-04 13:19:29,669 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:29,670 INFO  L93              Difference]: Finished difference Result 36 states and 44 transitions.
[2020-09-04 13:19:29,671 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-04 13:19:29,672 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 14
[2020-09-04 13:19:29,672 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:29,674 INFO  L225             Difference]: With dead ends: 36
[2020-09-04 13:19:29,674 INFO  L226             Difference]: Without dead ends: 32
[2020-09-04 13:19:29,676 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-04 13:19:29,677 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2020-09-04 13:19:29,687 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30.
[2020-09-04 13:19:29,688 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-09-04 13:19:29,689 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions.
[2020-09-04 13:19:29,690 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14
[2020-09-04 13:19:29,690 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:29,690 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 37 transitions.
[2020-09-04 13:19:29,691 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-04 13:19:29,691 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions.
[2020-09-04 13:19:29,692 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-09-04 13:19:29,693 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:29,693 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:29,694 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-04 13:19:29,694 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:29,695 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:29,695 INFO  L82        PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times
[2020-09-04 13:19:29,695 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:29,696 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332423124]
[2020-09-04 13:19:29,696 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:29,714 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,749 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:29,751 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,754 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:29,766 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,810 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:29,816 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,850 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-09-04 13:19:29,854 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,863 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-04 13:19:29,864 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332423124]
[2020-09-04 13:19:29,865 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258380771]
[2020-09-04 13:19:29,865 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:29,919 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:29,923 INFO  L263         TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 6 conjunts are in the unsatisfiable core
[2020-09-04 13:19:29,933 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-09-04 13:19:30,125 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-04 13:19:30,127 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-09-04 13:19:30,127 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10
[2020-09-04 13:19:30,128 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531487175]
[2020-09-04 13:19:30,129 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-09-04 13:19:30,129 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:30,130 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-09-04 13:19:30,130 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90
[2020-09-04 13:19:30,130 INFO  L87              Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states.
[2020-09-04 13:19:30,445 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:30,446 INFO  L93              Difference]: Finished difference Result 58 states and 78 transitions.
[2020-09-04 13:19:30,447 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-09-04 13:19:30,447 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 26
[2020-09-04 13:19:30,448 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:30,450 INFO  L225             Difference]: With dead ends: 58
[2020-09-04 13:19:30,450 INFO  L226             Difference]: Without dead ends: 34
[2020-09-04 13:19:30,452 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210
[2020-09-04 13:19:30,452 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-09-04 13:19:30,460 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32.
[2020-09-04 13:19:30,460 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-09-04 13:19:30,462 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions.
[2020-09-04 13:19:30,463 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26
[2020-09-04 13:19:30,463 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:30,463 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 39 transitions.
[2020-09-04 13:19:30,463 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-09-04 13:19:30,464 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions.
[2020-09-04 13:19:30,465 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-09-04 13:19:30,465 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:30,466 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:30,679 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2
[2020-09-04 13:19:30,681 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:30,682 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:30,682 INFO  L82        PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times
[2020-09-04 13:19:30,683 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:30,683 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967855575]
[2020-09-04 13:19:30,683 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:30,706 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:30,737 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:30,739 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:30,744 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:30,756 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:30,790 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:30,795 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:30,823 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:30,828 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:30,835 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-04 13:19:30,836 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967855575]
[2020-09-04 13:19:30,836 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100937108]
[2020-09-04 13:19:30,836 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:30,876 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:30,881 INFO  L263         TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core
[2020-09-04 13:19:30,887 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-09-04 13:19:30,956 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-09-04 13:19:30,957 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-09-04 13:19:30,957 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9
[2020-09-04 13:19:30,958 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092347708]
[2020-09-04 13:19:30,958 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-09-04 13:19:30,959 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:30,959 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-09-04 13:19:30,959 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72
[2020-09-04 13:19:30,960 INFO  L87              Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 9 states.
[2020-09-04 13:19:31,197 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:31,198 INFO  L93              Difference]: Finished difference Result 54 states and 74 transitions.
[2020-09-04 13:19:31,198 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-09-04 13:19:31,198 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 27
[2020-09-04 13:19:31,199 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:31,204 INFO  L225             Difference]: With dead ends: 54
[2020-09-04 13:19:31,204 INFO  L226             Difference]: Without dead ends: 50
[2020-09-04 13:19:31,206 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110
[2020-09-04 13:19:31,207 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2020-09-04 13:19:31,219 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48.
[2020-09-04 13:19:31,220 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2020-09-04 13:19:31,222 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions.
[2020-09-04 13:19:31,223 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27
[2020-09-04 13:19:31,223 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:31,223 INFO  L479      AbstractCegarLoop]: Abstraction has 48 states and 65 transitions.
[2020-09-04 13:19:31,223 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-09-04 13:19:31,224 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions.
[2020-09-04 13:19:31,226 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2020-09-04 13:19:31,226 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:31,226 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:31,441 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:31,443 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:31,444 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:31,444 INFO  L82        PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times
[2020-09-04 13:19:31,445 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:31,445 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322937712]
[2020-09-04 13:19:31,445 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:31,459 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:31,497 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:31,502 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:31,505 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:31,526 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:31,554 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:31,576 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:31,627 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:31,639 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:31,668 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-09-04 13:19:31,671 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:31,675 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2020-09-04 13:19:31,677 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:31,683 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-09-04 13:19:31,684 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322937712]
[2020-09-04 13:19:31,684 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735503322]
[2020-09-04 13:19:31,685 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:31,731 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:31,733 INFO  L263         TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-09-04 13:19:31,743 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-09-04 13:19:31,866 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-09-04 13:19:31,867 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-09-04 13:19:31,868 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11
[2020-09-04 13:19:31,868 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705876549]
[2020-09-04 13:19:31,869 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-09-04 13:19:31,870 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:31,870 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-09-04 13:19:31,871 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110
[2020-09-04 13:19:31,871 INFO  L87              Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 11 states.
[2020-09-04 13:19:32,279 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:32,280 INFO  L93              Difference]: Finished difference Result 108 states and 170 transitions.
[2020-09-04 13:19:32,280 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-09-04 13:19:32,281 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 39
[2020-09-04 13:19:32,282 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:32,285 INFO  L225             Difference]: With dead ends: 108
[2020-09-04 13:19:32,285 INFO  L226             Difference]: Without dead ends: 66
[2020-09-04 13:19:32,288 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306
[2020-09-04 13:19:32,289 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 66 states.
[2020-09-04 13:19:32,304 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66.
[2020-09-04 13:19:32,305 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 66 states.
[2020-09-04 13:19:32,308 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions.
[2020-09-04 13:19:32,309 INFO  L78                 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39
[2020-09-04 13:19:32,309 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:32,309 INFO  L479      AbstractCegarLoop]: Abstraction has 66 states and 95 transitions.
[2020-09-04 13:19:32,310 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-09-04 13:19:32,310 INFO  L276                IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions.
[2020-09-04 13:19:32,312 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2020-09-04 13:19:32,313 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:32,313 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:32,526 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:32,527 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:32,528 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:32,528 INFO  L82        PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times
[2020-09-04 13:19:32,530 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:32,530 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802108556]
[2020-09-04 13:19:32,531 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:32,544 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:32,629 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:32,631 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:32,633 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:32,651 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:32,687 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:32,702 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:32,782 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:32,786 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:32,791 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:32,793 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:32,798 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-09-04 13:19:32,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:32,821 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-09-04 13:19:32,822 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802108556]
[2020-09-04 13:19:32,822 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303614125]
[2020-09-04 13:19:32,823 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:32,860 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:32,862 INFO  L263         TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-09-04 13:19:32,866 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-09-04 13:19:32,978 INFO  L134       CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-09-04 13:19:32,979 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-09-04 13:19:32,979 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13
[2020-09-04 13:19:32,980 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952648779]
[2020-09-04 13:19:32,981 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-09-04 13:19:32,981 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:32,981 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-09-04 13:19:32,982 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156
[2020-09-04 13:19:32,982 INFO  L87              Difference]: Start difference. First operand 66 states and 95 transitions. Second operand 13 states.
[2020-09-04 13:19:33,509 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:33,510 INFO  L93              Difference]: Finished difference Result 180 states and 324 transitions.
[2020-09-04 13:19:33,511 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. 
[2020-09-04 13:19:33,511 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 40
[2020-09-04 13:19:33,513 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:33,522 INFO  L225             Difference]: With dead ends: 180
[2020-09-04 13:19:33,523 INFO  L226             Difference]: Without dead ends: 120
[2020-09-04 13:19:33,531 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462
[2020-09-04 13:19:33,532 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 120 states.
[2020-09-04 13:19:33,583 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106.
[2020-09-04 13:19:33,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 106 states.
[2020-09-04 13:19:33,591 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 169 transitions.
[2020-09-04 13:19:33,591 INFO  L78                 Accepts]: Start accepts. Automaton has 106 states and 169 transitions. Word has length 40
[2020-09-04 13:19:33,595 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:33,595 INFO  L479      AbstractCegarLoop]: Abstraction has 106 states and 169 transitions.
[2020-09-04 13:19:33,595 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-09-04 13:19:33,595 INFO  L276                IsEmpty]: Start isEmpty. Operand 106 states and 169 transitions.
[2020-09-04 13:19:33,604 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2020-09-04 13:19:33,604 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:33,604 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:33,808 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:33,810 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:33,810 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:33,811 INFO  L82        PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times
[2020-09-04 13:19:33,811 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:33,812 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771535870]
[2020-09-04 13:19:33,812 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:33,832 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:33,864 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:33,865 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:33,868 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:33,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:33,897 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:33,906 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:33,927 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:33,933 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:33,986 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:33,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:33,995 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:33,997 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:34,001 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-09-04 13:19:34,003 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:34,021 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36
[2020-09-04 13:19:34,024 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:34,033 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2020-09-04 13:19:34,034 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771535870]
[2020-09-04 13:19:34,035 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714224541]
[2020-09-04 13:19:34,035 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:34,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:34,081 INFO  L263         TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-09-04 13:19:34,085 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-09-04 13:19:34,240 INFO  L134       CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2020-09-04 13:19:34,241 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-09-04 13:19:34,242 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14
[2020-09-04 13:19:34,242 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273319753]
[2020-09-04 13:19:34,243 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-09-04 13:19:34,243 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:34,244 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-09-04 13:19:34,244 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182
[2020-09-04 13:19:34,244 INFO  L87              Difference]: Start difference. First operand 106 states and 169 transitions. Second operand 14 states.
[2020-09-04 13:19:34,987 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:34,987 INFO  L93              Difference]: Finished difference Result 258 states and 498 transitions.
[2020-09-04 13:19:34,991 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. 
[2020-09-04 13:19:34,991 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 54
[2020-09-04 13:19:34,992 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:34,996 INFO  L225             Difference]: With dead ends: 258
[2020-09-04 13:19:34,997 INFO  L226             Difference]: Without dead ends: 158
[2020-09-04 13:19:35,000 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552
[2020-09-04 13:19:35,001 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 158 states.
[2020-09-04 13:19:35,027 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 112.
[2020-09-04 13:19:35,028 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 112 states.
[2020-09-04 13:19:35,031 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 180 transitions.
[2020-09-04 13:19:35,031 INFO  L78                 Accepts]: Start accepts. Automaton has 112 states and 180 transitions. Word has length 54
[2020-09-04 13:19:35,032 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:35,032 INFO  L479      AbstractCegarLoop]: Abstraction has 112 states and 180 transitions.
[2020-09-04 13:19:35,032 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-09-04 13:19:35,032 INFO  L276                IsEmpty]: Start isEmpty. Operand 112 states and 180 transitions.
[2020-09-04 13:19:35,035 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2020-09-04 13:19:35,035 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:35,036 INFO  L422         BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:35,249 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6
[2020-09-04 13:19:35,250 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:35,251 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:35,251 INFO  L82        PathProgramCache]: Analyzing trace with hash -1504181040, now seen corresponding path program 1 times
[2020-09-04 13:19:35,252 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:35,253 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252441473]
[2020-09-04 13:19:35,253 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:35,277 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,317 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:35,319 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,321 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:35,339 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,361 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:35,375 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,399 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:35,409 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,441 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:35,448 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,505 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:35,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,513 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:35,515 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,520 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-09-04 13:19:35,522 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,527 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-09-04 13:19:35,529 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,551 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51
[2020-09-04 13:19:35,556 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,562 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:35,563 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,566 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:35,569 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,606 INFO  L134       CoverageAnalysis]: Checked inductivity of 140 backedges. 39 proven. 38 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked.
[2020-09-04 13:19:35,607 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252441473]
[2020-09-04 13:19:35,608 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603154153]
[2020-09-04 13:19:35,608 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:35,676 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:35,679 INFO  L263         TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-09-04 13:19:35,684 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-09-04 13:19:35,812 INFO  L134       CoverageAnalysis]: Checked inductivity of 140 backedges. 31 proven. 31 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked.
[2020-09-04 13:19:35,813 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-09-04 13:19:35,813 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14
[2020-09-04 13:19:35,814 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831094225]
[2020-09-04 13:19:35,815 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-09-04 13:19:35,815 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:35,816 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-09-04 13:19:35,816 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182
[2020-09-04 13:19:35,816 INFO  L87              Difference]: Start difference. First operand 112 states and 180 transitions. Second operand 14 states.
[2020-09-04 13:19:36,480 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:36,480 INFO  L93              Difference]: Finished difference Result 244 states and 474 transitions.
[2020-09-04 13:19:36,481 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-09-04 13:19:36,481 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 82
[2020-09-04 13:19:36,482 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:36,487 INFO  L225             Difference]: With dead ends: 244
[2020-09-04 13:19:36,487 INFO  L226             Difference]: Without dead ends: 123
[2020-09-04 13:19:36,491 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506
[2020-09-04 13:19:36,492 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 123 states.
[2020-09-04 13:19:36,539 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 101.
[2020-09-04 13:19:36,542 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 101 states.
[2020-09-04 13:19:36,546 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 154 transitions.
[2020-09-04 13:19:36,548 INFO  L78                 Accepts]: Start accepts. Automaton has 101 states and 154 transitions. Word has length 82
[2020-09-04 13:19:36,548 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:36,548 INFO  L479      AbstractCegarLoop]: Abstraction has 101 states and 154 transitions.
[2020-09-04 13:19:36,549 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-09-04 13:19:36,549 INFO  L276                IsEmpty]: Start isEmpty. Operand 101 states and 154 transitions.
[2020-09-04 13:19:36,556 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 137
[2020-09-04 13:19:36,556 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:36,556 INFO  L422         BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:36,771 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:36,772 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:36,773 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:36,773 INFO  L82        PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 1 times
[2020-09-04 13:19:36,773 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:36,774 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083405212]
[2020-09-04 13:19:36,774 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:36,802 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:36,855 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:36,856 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:36,858 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:36,879 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:36,927 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:36,939 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:36,986 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:36,995 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,036 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:37,044 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,073 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:37,078 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,108 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:37,112 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,118 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-09-04 13:19:37,121 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,127 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-09-04 13:19:37,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,139 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:37,141 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,148 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:37,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,159 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-09-04 13:19:37,176 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,211 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:37,224 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,267 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:37,281 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,349 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:37,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,356 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:37,362 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,366 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-09-04 13:19:37,368 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,376 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-09-04 13:19:37,384 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,392 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:37,393 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,396 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:37,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,477 INFO  L134       CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked.
[2020-09-04 13:19:37,478 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083405212]
[2020-09-04 13:19:37,478 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714568009]
[2020-09-04 13:19:37,479 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:37,561 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:37,563 INFO  L263         TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 12 conjunts are in the unsatisfiable core
[2020-09-04 13:19:37,579 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-09-04 13:19:37,717 INFO  L134       CoverageAnalysis]: Checked inductivity of 437 backedges. 131 proven. 51 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked.
[2020-09-04 13:19:37,719 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-09-04 13:19:37,719 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 18
[2020-09-04 13:19:37,720 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358492774]
[2020-09-04 13:19:37,721 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-09-04 13:19:37,721 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:37,722 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-09-04 13:19:37,722 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306
[2020-09-04 13:19:37,722 INFO  L87              Difference]: Start difference. First operand 101 states and 154 transitions. Second operand 18 states.
[2020-09-04 13:19:38,777 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:38,778 INFO  L93              Difference]: Finished difference Result 238 states and 428 transitions.
[2020-09-04 13:19:38,779 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-09-04 13:19:38,779 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 136
[2020-09-04 13:19:38,780 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:38,785 INFO  L225             Difference]: With dead ends: 238
[2020-09-04 13:19:38,786 INFO  L226             Difference]: Without dead ends: 135
[2020-09-04 13:19:38,792 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406
[2020-09-04 13:19:38,793 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 135 states.
[2020-09-04 13:19:38,822 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 112.
[2020-09-04 13:19:38,822 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 112 states.
[2020-09-04 13:19:38,826 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 160 transitions.
[2020-09-04 13:19:38,828 INFO  L78                 Accepts]: Start accepts. Automaton has 112 states and 160 transitions. Word has length 136
[2020-09-04 13:19:38,829 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:38,829 INFO  L479      AbstractCegarLoop]: Abstraction has 112 states and 160 transitions.
[2020-09-04 13:19:38,829 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-09-04 13:19:38,829 INFO  L276                IsEmpty]: Start isEmpty. Operand 112 states and 160 transitions.
[2020-09-04 13:19:38,833 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 96
[2020-09-04 13:19:38,833 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:38,834 INFO  L422         BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:39,050 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:39,052 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:39,052 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:39,053 INFO  L82        PathProgramCache]: Analyzing trace with hash -46122593, now seen corresponding path program 2 times
[2020-09-04 13:19:39,054 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:39,054 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307563893]
[2020-09-04 13:19:39,055 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:39,079 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,118 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-04 13:19:39,119 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,122 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-09-04 13:19:39,138 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,174 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:39,186 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,221 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:39,229 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,267 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:39,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,341 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:39,346 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,351 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:39,353 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,356 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-09-04 13:19:39,358 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,363 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-09-04 13:19:39,367 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,374 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:39,377 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,380 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:39,381 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,389 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-09-04 13:19:39,393 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,428 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-09-04 13:19:39,432 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,454 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-09-04 13:19:39,457 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,486 INFO  L134       CoverageAnalysis]: Checked inductivity of 188 backedges. 59 proven. 50 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked.
[2020-09-04 13:19:39,487 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307563893]
[2020-09-04 13:19:39,488 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996812869]
[2020-09-04 13:19:39,488 INFO  L93    rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2020-09-04 13:19:39,556 INFO  L228   tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s)
[2020-09-04 13:19:39,557 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-09-04 13:19:39,559 INFO  L263         TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-09-04 13:19:39,564 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-09-04 13:19:39,652 INFO  L134       CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked.
[2020-09-04 13:19:39,653 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-09-04 13:19:39,654 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15
[2020-09-04 13:19:39,654 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909459686]
[2020-09-04 13:19:39,655 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-09-04 13:19:39,656 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-09-04 13:19:39,656 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-09-04 13:19:39,656 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210
[2020-09-04 13:19:39,657 INFO  L87              Difference]: Start difference. First operand 112 states and 160 transitions. Second operand 15 states.
[2020-09-04 13:19:40,250 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-04 13:19:40,250 INFO  L93              Difference]: Finished difference Result 228 states and 340 transitions.
[2020-09-04 13:19:40,251 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2020-09-04 13:19:40,251 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 95
[2020-09-04 13:19:40,253 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-04 13:19:40,256 INFO  L225             Difference]: With dead ends: 228
[2020-09-04 13:19:40,256 INFO  L226             Difference]: Without dead ends: 129
[2020-09-04 13:19:40,258 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600
[2020-09-04 13:19:40,259 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 129 states.
[2020-09-04 13:19:40,273 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 117.
[2020-09-04 13:19:40,273 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 117 states.
[2020-09-04 13:19:40,276 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 163 transitions.
[2020-09-04 13:19:40,276 INFO  L78                 Accepts]: Start accepts. Automaton has 117 states and 163 transitions. Word has length 95
[2020-09-04 13:19:40,277 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-04 13:19:40,278 INFO  L479      AbstractCegarLoop]: Abstraction has 117 states and 163 transitions.
[2020-09-04 13:19:40,278 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-09-04 13:19:40,278 INFO  L276                IsEmpty]: Start isEmpty. Operand 117 states and 163 transitions.
[2020-09-04 13:19:40,280 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 110
[2020-09-04 13:19:40,281 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-04 13:19:40,281 INFO  L422         BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-04 13:19:40,494 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9
[2020-09-04 13:19:40,495 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-04 13:19:40,496 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-04 13:19:40,498 INFO  L82        PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times
[2020-09-04 13:19:40,498 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-09-04 13:19:40,499 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718333154]
[2020-09-04 13:19:40,499 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-04 13:19:40,540 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-04 13:19:40,540 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-09-04 13:19:40,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-04 13:19:40,589 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-09-04 13:19:40,654 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2020-09-04 13:19:40,655 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-09-04 13:19:40,656 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-09-04 13:19:40,798 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:19:40 BoogieIcfgContainer
[2020-09-04 13:19:40,798 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-04 13:19:40,805 INFO  L168              Benchmark]: Toolchain (without parser) took 13279.79 ms. Allocated memory was 136.8 MB in the beginning and 332.9 MB in the end (delta: 196.1 MB). Free memory was 100.6 MB in the beginning and 303.5 MB in the end (delta: -202.8 MB). Peak memory consumption was 209.6 MB. Max. memory is 7.1 GB.
[2020-09-04 13:19:40,806 INFO  L168              Benchmark]: CDTParser took 0.68 ms. Allocated memory is still 136.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
[2020-09-04 13:19:40,807 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 464.89 ms. Allocated memory is still 136.8 MB. Free memory was 100.4 MB in the beginning and 90.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
[2020-09-04 13:19:40,808 INFO  L168              Benchmark]: Boogie Preprocessor took 215.66 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB.
[2020-09-04 13:19:40,817 INFO  L168              Benchmark]: RCFGBuilder took 387.36 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 165.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
[2020-09-04 13:19:40,822 INFO  L168              Benchmark]: TraceAbstraction took 12202.62 ms. Allocated memory was 200.8 MB in the beginning and 332.9 MB in the end (delta: 132.1 MB). Free memory was 165.6 MB in the beginning and 303.5 MB in the end (delta: -137.8 MB). Peak memory consumption was 210.6 MB. Max. memory is 7.1 GB.
[2020-09-04 13:19:40,832 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.68 ms. Allocated memory is still 136.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 464.89 ms. Allocated memory is still 136.8 MB. Free memory was 100.4 MB in the beginning and 90.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 215.66 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 90.9 MB in the beginning and 179.1 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 387.36 ms. Allocated memory is still 200.8 MB. Free memory was 179.1 MB in the beginning and 165.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 12202.62 ms. Allocated memory was 200.8 MB in the beginning and 332.9 MB in the end (delta: 132.1 MB). Free memory was 165.6 MB in the beginning and 303.5 MB in the end (delta: -137.8 MB). Peak memory consumption was 210.6 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L36]              int x = 5;
       VAL         [x=5]
[L37]  CALL, EXPR  fibo1(x)
       VAL         [\old(n)=5]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=5, n=5]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=5, n=5]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=4]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=4, n=4]
[L20]  COND FALSE  !(n == 1)
       VAL         [\old(n)=4, n=4]
[L23]  CALL, EXPR  fibo1(n-1)
       VAL         [\old(n)=3]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=3, n=3]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=3, n=3]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=2]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=2, n=2]
[L20]  COND FALSE  !(n == 1)
       VAL         [\old(n)=2, n=2]
[L23]  CALL, EXPR  fibo1(n-1)
       VAL         [\old(n)=1]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L10]  COND TRUE   n == 1
[L11]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L23]  RET, EXPR   fibo1(n-1)
       VAL         [\old(n)=2, fibo1(n-1)=1, n=2]
[L23]  CALL, EXPR  fibo1(n-2)
       VAL         [\old(n)=0]
[L8]   COND TRUE   n < 1
[L9]               return 0;
       VAL         [\old(n)=0, \result=0, n=0]
[L23]  RET, EXPR   fibo1(n-2)
       VAL         [\old(n)=2, fibo1(n-1)=1, fibo1(n-2)=0, n=2]
[L23]              return fibo1(n-1) + fibo1(n-2);
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=3, fibo2(n-1)=1, n=3]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=1]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L20]  COND TRUE   n == 1
[L21]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=3, fibo2(n-1)=1, fibo2(n-2)=1, n=3]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L23]  RET, EXPR   fibo1(n-1)
       VAL         [\old(n)=4, fibo1(n-1)=2, n=4]
[L23]  CALL, EXPR  fibo1(n-2)
       VAL         [\old(n)=2]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=2, n=2]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=2, n=2]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=1]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L20]  COND TRUE   n == 1
[L21]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=2, fibo2(n-1)=1, n=2]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=0]
[L18]  COND TRUE   n < 1
[L19]              return 0;
       VAL         [\old(n)=0, \result=0, n=0]
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L23]  RET, EXPR   fibo1(n-2)
       VAL         [\old(n)=4, fibo1(n-1)=2, fibo1(n-2)=1, n=4]
[L23]              return fibo1(n-1) + fibo1(n-2);
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=5, fibo2(n-1)=3, n=5]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=3]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=3, n=3]
[L20]  COND FALSE  !(n == 1)
       VAL         [\old(n)=3, n=3]
[L23]  CALL, EXPR  fibo1(n-1)
       VAL         [\old(n)=2]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=2, n=2]
[L10]  COND FALSE  !(n == 1)
       VAL         [\old(n)=2, n=2]
[L13]  CALL, EXPR  fibo2(n-1)
       VAL         [\old(n)=1]
[L18]  COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L20]  COND TRUE   n == 1
[L21]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L13]  RET, EXPR   fibo2(n-1)
       VAL         [\old(n)=2, fibo2(n-1)=1, n=2]
[L13]  CALL, EXPR  fibo2(n-2)
       VAL         [\old(n)=0]
[L18]  COND TRUE   n < 1
[L19]              return 0;
       VAL         [\old(n)=0, \result=0, n=0]
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=2, fibo2(n-1)=1, fibo2(n-2)=0, n=2]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L23]  RET, EXPR   fibo1(n-1)
       VAL         [\old(n)=3, fibo1(n-1)=1, n=3]
[L23]  CALL, EXPR  fibo1(n-2)
       VAL         [\old(n)=1]
[L8]   COND FALSE  !(n < 1)
       VAL         [\old(n)=1, n=1]
[L10]  COND TRUE   n == 1
[L11]              return 1;
       VAL         [\old(n)=1, \result=1, n=1]
[L23]  RET, EXPR   fibo1(n-2)
       VAL         [\old(n)=3, fibo1(n-1)=1, fibo1(n-2)=1, n=3]
[L23]              return fibo1(n-1) + fibo1(n-2);
[L13]  RET, EXPR   fibo2(n-2)
       VAL         [\old(n)=5, fibo2(n-1)=3, fibo2(n-2)=2, n=5]
[L13]              return fibo2(n-1) + fibo2(n-2);
[L37]  RET, EXPR   fibo1(x)
       VAL         [fibo1(x)=5, x=5]
[L37]              int result = fibo1(x);
[L38]  COND TRUE   result == 5
       VAL         [result=5, x=5]
[L39]              __VERIFIER_error()
       VAL         [result=5, x=5]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.9s, OverallIterations: 11, TraceHistogramMax: 10, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 301 SDtfs, 433 SDslu, 1735 SDs, 0 SdLazy, 2418 SolverSat, 421 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 822 GetRequests, 654 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 10 MinimizatonAttempts, 123 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 1134 NumberOfCodeBlocks, 1134 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 1007 ConstructedInterpolants, 0 QuantifiedInterpolants, 138229 SizeOfPredicates, 33 NumberOfNonLiveVariables, 1125 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 1301/1700 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...