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/eca-rers2012/Problem18_label12.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 22:05:19,422 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-14 22:05:19,502 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-14 22:05:19,515 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 22:05:19,516 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 22:05:19,517 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 22:05:19,517 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 22:05:19,517 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 22:05:19,517 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 22:05:19,518 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 22:05:19,518 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 22:05:19,518 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 22:05:19,518 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 22:05:19,518 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 22:05:19,519 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 22:05:19,519 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 22:05:19,519 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 22:05:19,519 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 22:05:19,519 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 22:05:19,520 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 22:05:19,520 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 22:05:19,520 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 22:05:19,520 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 22:05:19,520 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 22:05:19,521 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 22:05:19,521 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 22:05:19,521 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 22:05:19,521 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 22:05:19,521 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 22:05:19,522 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 22:05:19,522 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 22:05:19,522 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 22:05:19,803 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 22:05:19,819 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 22:05:19,823 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 22:05:19,825 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 22:05:19,825 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 22:05:19,826 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label12.c
[2019-10-14 22:05:19,909 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73613d855/4bcb95570ab54ca4b8609514ada32a47/FLAG4ce0fc6e7
[2019-10-14 22:05:20,654 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 22:05:20,655 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label12.c
[2019-10-14 22:05:20,684 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73613d855/4bcb95570ab54ca4b8609514ada32a47/FLAG4ce0fc6e7
[2019-10-14 22:05:20,810 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73613d855/4bcb95570ab54ca4b8609514ada32a47
[2019-10-14 22:05:20,824 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 22:05:20,825 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 22:05:20,826 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 22:05:20,827 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 22:05:20,830 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 22:05:20,831 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:20" (1/1) ...
[2019-10-14 22:05:20,834 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33b5c0b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:20, skipping insertion in model container
[2019-10-14 22:05:20,834 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:20" (1/1) ...
[2019-10-14 22:05:20,843 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 22:05:20,961 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 22:05:22,067 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:05:22,078 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 22:05:22,641 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:05:22,669 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 22:05:22,670 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22 WrapperNode
[2019-10-14 22:05:22,671 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 22:05:22,672 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 22:05:22,672 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 22:05:22,673 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 22:05:22,687 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22" (1/1) ...
[2019-10-14 22:05:22,688 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22" (1/1) ...
[2019-10-14 22:05:22,740 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22" (1/1) ...
[2019-10-14 22:05:22,742 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22" (1/1) ...
[2019-10-14 22:05:22,880 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22" (1/1) ...
[2019-10-14 22:05:22,918 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22" (1/1) ...
[2019-10-14 22:05:22,935 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22" (1/1) ...
[2019-10-14 22:05:22,956 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 22:05:22,957 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 22:05:22,957 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 22:05:22,957 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 22:05:22,961 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 22:05:23,036 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 22:05:23,037 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 22:05:23,037 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 22:05:23,037 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-14 22:05:23,038 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-14 22:05:23,038 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 22:05:23,038 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 22:05:23,038 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-14 22:05:23,038 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-14 22:05:23,039 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 22:05:23,039 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 22:05:23,039 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 22:05:23,040 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 22:05:23,040 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 22:05:23,041 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 22:05:27,100 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 22:05:27,104 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 22:05:27,106 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:27 BoogieIcfgContainer
[2019-10-14 22:05:27,108 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 22:05:27,110 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 22:05:27,110 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 22:05:27,113 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 22:05:27,113 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:05:20" (1/3) ...
[2019-10-14 22:05:27,114 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d278d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:27, skipping insertion in model container
[2019-10-14 22:05:27,115 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:22" (2/3) ...
[2019-10-14 22:05:27,116 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d278d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:27, skipping insertion in model container
[2019-10-14 22:05:27,116 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:27" (3/3) ...
[2019-10-14 22:05:27,120 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem18_label12.c
[2019-10-14 22:05:27,135 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 22:05:27,148 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 22:05:27,162 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 22:05:27,213 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 22:05:27,213 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 22:05:27,213 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 22:05:27,213 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 22:05:27,213 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 22:05:27,213 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 22:05:27,214 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 22:05:27,214 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 22:05:27,262 INFO  L276                IsEmpty]: Start isEmpty. Operand 774 states.
[2019-10-14 22:05:27,269 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2019-10-14 22:05:27,269 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:27,270 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:05:27,272 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:27,280 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:27,280 INFO  L82        PathProgramCache]: Analyzing trace with hash -1916525318, now seen corresponding path program 1 times
[2019-10-14 22:05:27,290 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:27,290 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179771448]
[2019-10-14 22:05:27,290 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:27,291 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:27,291 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:27,451 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:27,591 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:27,612 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:05:27,613 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179771448]
[2019-10-14 22:05:27,614 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 22:05:27,614 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 22:05:27,614 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377037650]
[2019-10-14 22:05:27,620 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:27,620 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:27,635 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:27,636 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 22:05:27,638 INFO  L87              Difference]: Start difference. First operand 774 states. Second operand 5 states.
[2019-10-14 22:05:37,198 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:37,198 INFO  L93              Difference]: Finished difference Result 2984 states and 5770 transitions.
[2019-10-14 22:05:37,199 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 22:05:37,200 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 23
[2019-10-14 22:05:37,201 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:37,234 INFO  L225             Difference]: With dead ends: 2984
[2019-10-14 22:05:37,235 INFO  L226             Difference]: Without dead ends: 2142
[2019-10-14 22:05:37,245 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-14 22:05:37,269 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2142 states.
[2019-10-14 22:05:37,400 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132.
[2019-10-14 22:05:37,402 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2132 states.
[2019-10-14 22:05:37,414 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions.
[2019-10-14 22:05:37,416 INFO  L78                 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 23
[2019-10-14 22:05:37,416 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:37,417 INFO  L462      AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions.
[2019-10-14 22:05:37,417 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:05:37,417 INFO  L276                IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions.
[2019-10-14 22:05:37,422 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 112
[2019-10-14 22:05:37,423 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:37,423 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:05:37,423 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:37,424 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:37,424 INFO  L82        PathProgramCache]: Analyzing trace with hash -819711902, now seen corresponding path program 1 times
[2019-10-14 22:05:37,424 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:37,425 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293220689]
[2019-10-14 22:05:37,425 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:37,425 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:37,425 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:37,509 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:37,592 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:37,636 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:37,787 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:05:37,788 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293220689]
[2019-10-14 22:05:37,788 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 22:05:37,788 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2019-10-14 22:05:37,788 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484301961]
[2019-10-14 22:05:37,791 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-10-14 22:05:37,791 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:37,791 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-10-14 22:05:37,792 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-14 22:05:37,792 INFO  L87              Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states.
[2019-10-14 22:05:48,654 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:48,654 INFO  L93              Difference]: Finished difference Result 8649 states and 15485 transitions.
[2019-10-14 22:05:48,655 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-14 22:05:48,655 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 111
[2019-10-14 22:05:48,655 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:48,692 INFO  L225             Difference]: With dead ends: 8649
[2019-10-14 22:05:48,692 INFO  L226             Difference]: Without dead ends: 6523
[2019-10-14 22:05:48,700 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272
[2019-10-14 22:05:48,708 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6523 states.
[2019-10-14 22:05:48,891 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6523 to 6502.
[2019-10-14 22:05:48,891 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6502 states.
[2019-10-14 22:05:48,917 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6502 states to 6502 states and 9753 transitions.
[2019-10-14 22:05:48,917 INFO  L78                 Accepts]: Start accepts. Automaton has 6502 states and 9753 transitions. Word has length 111
[2019-10-14 22:05:48,918 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:48,919 INFO  L462      AbstractCegarLoop]: Abstraction has 6502 states and 9753 transitions.
[2019-10-14 22:05:48,919 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-10-14 22:05:48,920 INFO  L276                IsEmpty]: Start isEmpty. Operand 6502 states and 9753 transitions.
[2019-10-14 22:05:48,931 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 135
[2019-10-14 22:05:48,932 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:48,932 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:05:48,933 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:48,934 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:48,934 INFO  L82        PathProgramCache]: Analyzing trace with hash 1618208947, now seen corresponding path program 1 times
[2019-10-14 22:05:48,935 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:48,935 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574979515]
[2019-10-14 22:05:48,935 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:48,935 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:48,936 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:48,993 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:49,111 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:49,170 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:49,255 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:05:49,256 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574979515]
[2019-10-14 22:05:49,256 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712120363]
[2019-10-14 22:05:49,256 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/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
[2019-10-14 22:05:49,391 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:49,395 INFO  L256         TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 22:05:49,416 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:49,519 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:05:49,520 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:05:49,531 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 8
[2019-10-14 22:05:49,531 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477967470]
[2019-10-14 22:05:49,532 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 22:05:49,533 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:49,533 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 22:05:49,537 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-10-14 22:05:49,537 INFO  L87              Difference]: Start difference. First operand 6502 states and 9753 transitions. Second operand 3 states.
[2019-10-14 22:05:53,318 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:53,319 INFO  L93              Difference]: Finished difference Result 17267 states and 25492 transitions.
[2019-10-14 22:05:53,320 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 22:05:53,320 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 134
[2019-10-14 22:05:53,323 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:53,370 INFO  L225             Difference]: With dead ends: 17267
[2019-10-14 22:05:53,370 INFO  L226             Difference]: Without dead ends: 10771
[2019-10-14 22:05:53,388 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2019-10-14 22:05:53,401 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10771 states.
[2019-10-14 22:05:53,643 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10771 to 9360.
[2019-10-14 22:05:53,644 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9360 states.
[2019-10-14 22:05:53,668 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9360 states to 9360 states and 13070 transitions.
[2019-10-14 22:05:53,668 INFO  L78                 Accepts]: Start accepts. Automaton has 9360 states and 13070 transitions. Word has length 134
[2019-10-14 22:05:53,728 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:53,728 INFO  L462      AbstractCegarLoop]: Abstraction has 9360 states and 13070 transitions.
[2019-10-14 22:05:53,728 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 22:05:53,729 INFO  L276                IsEmpty]: Start isEmpty. Operand 9360 states and 13070 transitions.
[2019-10-14 22:05:53,734 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 187
[2019-10-14 22:05:53,735 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:53,735 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:05:53,936 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:53,936 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:53,937 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:53,937 INFO  L82        PathProgramCache]: Analyzing trace with hash 1504597139, now seen corresponding path program 1 times
[2019-10-14 22:05:53,937 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:53,938 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662155416]
[2019-10-14 22:05:53,938 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:53,938 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:53,938 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:53,983 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:54,047 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:54,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:54,167 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:54,214 INFO  L134       CoverageAnalysis]: Checked inductivity of 106 backedges. 32 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-14 22:05:54,215 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662155416]
[2019-10-14 22:05:54,215 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437783220]
[2019-10-14 22:05:54,215 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/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
[2019-10-14 22:05:54,295 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:54,296 INFO  L256         TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 22:05:54,301 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:54,381 INFO  L134       CoverageAnalysis]: Checked inductivity of 106 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked.
[2019-10-14 22:05:54,381 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:05:54,382 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-14 22:05:54,383 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189215544]
[2019-10-14 22:05:54,385 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:54,385 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:54,385 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:54,385 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 22:05:54,386 INFO  L87              Difference]: Start difference. First operand 9360 states and 13070 transitions. Second operand 5 states.