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_label21.c


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This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 18:06:41,133 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-13 18:06:41,224 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
[2019-10-13 18:06:41,243 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 18:06:41,243 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 18:06:41,244 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 18:06:41,245 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 18:06:41,245 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 18:06:41,245 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 18:06:41,245 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 18:06:41,246 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 18:06:41,246 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 18:06:41,246 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 18:06:41,246 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 18:06:41,247 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 18:06:41,247 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 18:06:41,247 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 18:06:41,247 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 18:06:41,247 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 18:06:41,248 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 18:06:41,248 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 18:06:41,248 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 18:06:41,248 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 18:06:41,248 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 18:06:41,249 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 18:06:41,249 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 18:06:41,249 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 18:06:41,249 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 18:06:41,249 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 18:06:41,250 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 18:06:41,250 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 18:06:41,250 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 18:06:41,523 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 18:06:41,535 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 18:06:41,539 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 18:06:41,540 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 18:06:41,541 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 18:06:41,541 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label21.c
[2019-10-13 18:06:41,603 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe8f6dd6/46cbdc05755f4173a015018f47a43bb3/FLAG239882703
[2019-10-13 18:06:42,383 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 18:06:42,385 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label21.c
[2019-10-13 18:06:42,420 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe8f6dd6/46cbdc05755f4173a015018f47a43bb3/FLAG239882703
[2019-10-13 18:06:42,447 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ffe8f6dd6/46cbdc05755f4173a015018f47a43bb3
[2019-10-13 18:06:42,458 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 18:06:42,461 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 18:06:42,463 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 18:06:42,463 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 18:06:42,466 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 18:06:42,468 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:42" (1/1) ...
[2019-10-13 18:06:42,471 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9fb768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42, skipping insertion in model container
[2019-10-13 18:06:42,471 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:42" (1/1) ...
[2019-10-13 18:06:42,479 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 18:06:42,608 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 18:06:43,755 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:06:43,768 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 18:06:44,362 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:06:44,390 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 18:06:44,391 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44 WrapperNode
[2019-10-13 18:06:44,392 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 18:06:44,393 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 18:06:44,393 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 18:06:44,393 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 18:06:44,408 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44" (1/1) ...
[2019-10-13 18:06:44,408 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44" (1/1) ...
[2019-10-13 18:06:44,464 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44" (1/1) ...
[2019-10-13 18:06:44,466 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44" (1/1) ...
[2019-10-13 18:06:44,561 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44" (1/1) ...
[2019-10-13 18:06:44,592 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44" (1/1) ...
[2019-10-13 18:06:44,609 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44" (1/1) ...
[2019-10-13 18:06:44,627 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 18:06:44,628 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 18:06:44,628 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 18:06:44,628 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 18:06:44,630 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44" (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
[2019-10-13 18:06:44,701 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 18:06:44,702 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 18:06:44,702 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 18:06:44,702 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-13 18:06:44,702 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-13 18:06:44,702 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 18:06:44,702 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 18:06:44,703 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-13 18:06:44,703 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-13 18:06:44,703 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 18:06:44,703 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 18:06:44,703 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 18:06:44,704 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 18:06:44,704 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 18:06:44,704 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 18:06:48,685 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 18:06:48,685 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 18:06:48,687 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:48 BoogieIcfgContainer
[2019-10-13 18:06:48,687 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 18:06:48,689 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 18:06:48,689 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 18:06:48,692 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 18:06:48,692 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:42" (1/3) ...
[2019-10-13 18:06:48,693 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51de864f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:48, skipping insertion in model container
[2019-10-13 18:06:48,693 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:44" (2/3) ...
[2019-10-13 18:06:48,694 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51de864f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:48, skipping insertion in model container
[2019-10-13 18:06:48,694 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:48" (3/3) ...
[2019-10-13 18:06:48,698 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem18_label21.c
[2019-10-13 18:06:48,709 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 18:06:48,720 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 18:06:48,730 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 18:06:48,764 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 18:06:48,764 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 18:06:48,764 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 18:06:48,764 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 18:06:48,765 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 18:06:48,765 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 18:06:48,765 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 18:06:48,765 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 18:06:48,805 INFO  L276                IsEmpty]: Start isEmpty. Operand 774 states.
[2019-10-13 18:06:48,818 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 65
[2019-10-13 18:06:48,819 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:06:48,820 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:06:48,822 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:06:48,828 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:06:48,829 INFO  L82        PathProgramCache]: Analyzing trace with hash -242469919, now seen corresponding path program 1 times
[2019-10-13 18:06:48,838 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:06:48,839 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683720249]
[2019-10-13 18:06:48,839 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:06:48,840 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:06:48,840 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:06:49,038 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:06:49,282 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:06:49,335 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:06:49,336 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683720249]
[2019-10-13 18:06:49,338 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:06:49,338 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 18:06:49,339 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460361598]
[2019-10-13 18:06:49,344 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:06:49,344 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:06:49,359 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:06:49,360 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:06:49,362 INFO  L87              Difference]: Start difference. First operand 774 states. Second operand 5 states.
[2019-10-13 18:06:59,377 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:06:59,378 INFO  L93              Difference]: Finished difference Result 2984 states and 5770 transitions.
[2019-10-13 18:06:59,379 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:06:59,380 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 64
[2019-10-13 18:06:59,381 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:06:59,416 INFO  L225             Difference]: With dead ends: 2984
[2019-10-13 18:06:59,416 INFO  L226             Difference]: Without dead ends: 2142
[2019-10-13 18:06:59,429 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:06:59,448 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2142 states.
[2019-10-13 18:06:59,583 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2132.
[2019-10-13 18:06:59,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2132 states.
[2019-10-13 18:06:59,597 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 3753 transitions.
[2019-10-13 18:06:59,599 INFO  L78                 Accepts]: Start accepts. Automaton has 2132 states and 3753 transitions. Word has length 64
[2019-10-13 18:06:59,600 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:06:59,600 INFO  L462      AbstractCegarLoop]: Abstraction has 2132 states and 3753 transitions.
[2019-10-13 18:06:59,600 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:06:59,600 INFO  L276                IsEmpty]: Start isEmpty. Operand 2132 states and 3753 transitions.
[2019-10-13 18:06:59,607 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 138
[2019-10-13 18:06:59,608 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:06:59,608 INFO  L380         BasicCegarLoop]: trace histogram [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]
[2019-10-13 18:06:59,609 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:06:59,609 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:06:59,609 INFO  L82        PathProgramCache]: Analyzing trace with hash 1527115477, now seen corresponding path program 1 times
[2019-10-13 18:06:59,610 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:06:59,610 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922889966]
[2019-10-13 18:06:59,610 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:06:59,610 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:06:59,611 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:06:59,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:06:59,773 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:06:59,809 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:06:59,981 INFO  L134       CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:06:59,981 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922889966]
[2019-10-13 18:06:59,981 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:06:59,982 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2019-10-13 18:06:59,982 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812032596]
[2019-10-13 18:06:59,987 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-10-13 18:06:59,987 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:06:59,988 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-10-13 18:06:59,988 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-13 18:06:59,988 INFO  L87              Difference]: Start difference. First operand 2132 states and 3753 transitions. Second operand 9 states.
[2019-10-13 18:07:11,190 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:07:11,191 INFO  L93              Difference]: Finished difference Result 8648 states and 15579 transitions.
[2019-10-13 18:07:11,191 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-13 18:07:11,191 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 137
[2019-10-13 18:07:11,192 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:07:11,233 INFO  L225             Difference]: With dead ends: 8648
[2019-10-13 18:07:11,233 INFO  L226             Difference]: Without dead ends: 6522
[2019-10-13 18:07:11,241 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272
[2019-10-13 18:07:11,257 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6522 states.
[2019-10-13 18:07:11,409 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6522 to 6483.
[2019-10-13 18:07:11,409 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6483 states.
[2019-10-13 18:07:11,432 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6483 states to 6483 states and 10418 transitions.
[2019-10-13 18:07:11,432 INFO  L78                 Accepts]: Start accepts. Automaton has 6483 states and 10418 transitions. Word has length 137
[2019-10-13 18:07:11,433 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:07:11,433 INFO  L462      AbstractCegarLoop]: Abstraction has 6483 states and 10418 transitions.
[2019-10-13 18:07:11,433 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-10-13 18:07:11,433 INFO  L276                IsEmpty]: Start isEmpty. Operand 6483 states and 10418 transitions.
[2019-10-13 18:07:11,447 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 227
[2019-10-13 18:07:11,448 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:07:11,448 INFO  L380         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:07:11,449 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:07:11,450 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:07:11,451 INFO  L82        PathProgramCache]: Analyzing trace with hash -1106833084, now seen corresponding path program 1 times
[2019-10-13 18:07:11,451 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:07:11,451 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11334203]
[2019-10-13 18:07:11,451 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:07:11,452 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:07:11,452 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:07:11,532 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:11,611 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:11,666 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:11,876 INFO  L134       CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:07:11,877 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11334203]
[2019-10-13 18:07:11,877 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:07:11,877 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2019-10-13 18:07:11,877 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50868507]
[2019-10-13 18:07:11,878 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-10-13 18:07:11,878 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:07:11,879 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-10-13 18:07:11,879 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-13 18:07:11,879 INFO  L87              Difference]: Start difference. First operand 6483 states and 10418 transitions. Second operand 9 states.