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_label30.c


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This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 18:06:55,658 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 18:06:55,660 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-13 18:06:55,738 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 18:06:55,752 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 18:06:55,752 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 18:06:55,753 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 18:06:55,754 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 18:06:55,754 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 18:06:55,754 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 18:06:55,754 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 18:06:55,755 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 18:06:55,755 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 18:06:55,755 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 18:06:55,755 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 18:06:55,755 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 18:06:55,755 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 18:06:55,756 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 18:06:55,756 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 18:06:55,756 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 18:06:55,756 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 18:06:55,756 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 18:06:55,757 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 18:06:55,757 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 18:06:55,757 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 18:06:55,757 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 18:06:55,757 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 18:06:55,758 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 18:06:55,758 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 18:06:55,758 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 18:06:55,758 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 18:06:55,758 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 18:06:55,759 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 18:06:56,047 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 18:06:56,060 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 18:06:56,064 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 18:06:56,065 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 18:06:56,066 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 18:06:56,067 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label30.c
[2019-10-13 18:06:56,127 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e73524836/99e50d8d571e4bbfb0ddb45775eb637f/FLAG9a8f7573d
[2019-10-13 18:06:56,865 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 18:06:56,866 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label30.c
[2019-10-13 18:06:56,892 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e73524836/99e50d8d571e4bbfb0ddb45775eb637f/FLAG9a8f7573d
[2019-10-13 18:06:56,975 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e73524836/99e50d8d571e4bbfb0ddb45775eb637f
[2019-10-13 18:06:56,986 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 18:06:56,988 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 18:06:56,990 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 18:06:56,990 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 18:06:56,994 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 18:06:56,995 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:56" (1/1) ...
[2019-10-13 18:06:56,998 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b2e1afb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:56, skipping insertion in model container
[2019-10-13 18:06:56,998 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:56" (1/1) ...
[2019-10-13 18:06:57,007 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 18:06:57,135 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 18:06:58,451 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:06:58,465 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 18:06:58,983 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:06:59,014 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 18:06:59,014 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59 WrapperNode
[2019-10-13 18:06:59,014 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 18:06:59,015 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 18:06:59,016 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 18:06:59,016 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 18:06:59,032 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59" (1/1) ...
[2019-10-13 18:06:59,032 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59" (1/1) ...
[2019-10-13 18:06:59,089 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59" (1/1) ...
[2019-10-13 18:06:59,091 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59" (1/1) ...
[2019-10-13 18:06:59,199 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59" (1/1) ...
[2019-10-13 18:06:59,233 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59" (1/1) ...
[2019-10-13 18:06:59,250 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59" (1/1) ...
[2019-10-13 18:06:59,269 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 18:06:59,270 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 18:06:59,270 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 18:06:59,270 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 18:06:59,272 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59" (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 18:06:59,344 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 18:06:59,344 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 18:06:59,345 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 18:06:59,345 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-13 18:06:59,345 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-13 18:06:59,345 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 18:06:59,345 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 18:06:59,346 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-13 18:06:59,346 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-13 18:06:59,346 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 18:06:59,346 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 18:06:59,346 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 18:06:59,346 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 18:06:59,347 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 18:06:59,347 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 18:07:03,382 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 18:07:03,383 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 18:07:03,387 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:07:03 BoogieIcfgContainer
[2019-10-13 18:07:03,388 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 18:07:03,389 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 18:07:03,390 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 18:07:03,393 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 18:07:03,393 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:56" (1/3) ...
[2019-10-13 18:07:03,394 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4170dd0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:07:03, skipping insertion in model container
[2019-10-13 18:07:03,394 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:59" (2/3) ...
[2019-10-13 18:07:03,395 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4170dd0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:07:03, skipping insertion in model container
[2019-10-13 18:07:03,395 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:07:03" (3/3) ...
[2019-10-13 18:07:03,405 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem18_label30.c
[2019-10-13 18:07:03,416 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 18:07:03,426 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 18:07:03,438 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 18:07:03,483 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 18:07:03,484 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 18:07:03,484 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 18:07:03,485 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 18:07:03,485 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 18:07:03,485 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 18:07:03,485 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 18:07:03,485 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 18:07:03,527 INFO  L276                IsEmpty]: Start isEmpty. Operand 774 states.
[2019-10-13 18:07:03,537 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2019-10-13 18:07:03,537 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:07:03,539 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]
[2019-10-13 18:07:03,542 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:07:03,547 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:07:03,548 INFO  L82        PathProgramCache]: Analyzing trace with hash 2051864770, now seen corresponding path program 1 times
[2019-10-13 18:07:03,557 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:07:03,557 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125764932]
[2019-10-13 18:07:03,558 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:07:03,558 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:07:03,558 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:07:03,693 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:03,957 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:03,977 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 18:07:03,978 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125764932]
[2019-10-13 18:07:03,979 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:07:03,979 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 18:07:03,979 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001173656]
[2019-10-13 18:07:03,985 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:07:03,985 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:07:04,000 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:07:04,002 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:07:04,004 INFO  L87              Difference]: Start difference. First operand 774 states. Second operand 5 states.
[2019-10-13 18:07:14,998 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:07:14,999 INFO  L93              Difference]: Finished difference Result 3000 states and 5781 transitions.
[2019-10-13 18:07:14,999 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:07:15,001 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 49
[2019-10-13 18:07:15,001 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:07:15,094 INFO  L225             Difference]: With dead ends: 3000
[2019-10-13 18:07:15,094 INFO  L226             Difference]: Without dead ends: 2142
[2019-10-13 18:07:15,106 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:07:15,125 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2142 states.
[2019-10-13 18:07:15,267 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2138.
[2019-10-13 18:07:15,268 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2138 states.
[2019-10-13 18:07:15,282 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3344 transitions.
[2019-10-13 18:07:15,284 INFO  L78                 Accepts]: Start accepts. Automaton has 2138 states and 3344 transitions. Word has length 49
[2019-10-13 18:07:15,285 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:07:15,286 INFO  L462      AbstractCegarLoop]: Abstraction has 2138 states and 3344 transitions.
[2019-10-13 18:07:15,286 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:07:15,286 INFO  L276                IsEmpty]: Start isEmpty. Operand 2138 states and 3344 transitions.
[2019-10-13 18:07:15,306 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 119
[2019-10-13 18:07:15,306 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:07:15,307 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:15,308 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:07:15,308 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:07:15,308 INFO  L82        PathProgramCache]: Analyzing trace with hash -600771033, now seen corresponding path program 1 times
[2019-10-13 18:07:15,308 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:07:15,309 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718136793]
[2019-10-13 18:07:15,309 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:07:15,311 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:07:15,312 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:07:15,352 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:15,439 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:15,500 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:15,585 INFO  L134       CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:07:15,586 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718136793]
[2019-10-13 18:07:15,586 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:07:15,586 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-13 18:07:15,587 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922889966]
[2019-10-13 18:07:15,589 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 18:07:15,589 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:07:15,590 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 18:07:15,590 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2019-10-13 18:07:15,590 INFO  L87              Difference]: Start difference. First operand 2138 states and 3344 transitions. Second operand 8 states.
[2019-10-13 18:07:26,010 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:07:26,010 INFO  L93              Difference]: Finished difference Result 8662 states and 13798 transitions.
[2019-10-13 18:07:26,011 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-13 18:07:26,011 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 118
[2019-10-13 18:07:26,011 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:07:26,045 INFO  L225             Difference]: With dead ends: 8662
[2019-10-13 18:07:26,046 INFO  L226             Difference]: Without dead ends: 6530
[2019-10-13 18:07:26,053 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240
[2019-10-13 18:07:26,060 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6530 states.
[2019-10-13 18:07:26,200 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6530 to 6509.
[2019-10-13 18:07:26,200 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 6509 states.
[2019-10-13 18:07:26,220 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 6509 states to 6509 states and 8974 transitions.
[2019-10-13 18:07:26,221 INFO  L78                 Accepts]: Start accepts. Automaton has 6509 states and 8974 transitions. Word has length 118
[2019-10-13 18:07:26,221 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:07:26,222 INFO  L462      AbstractCegarLoop]: Abstraction has 6509 states and 8974 transitions.
[2019-10-13 18:07:26,222 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-13 18:07:26,222 INFO  L276                IsEmpty]: Start isEmpty. Operand 6509 states and 8974 transitions.
[2019-10-13 18:07:26,227 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 268
[2019-10-13 18:07:26,228 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:07:26,228 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:07:26,228 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:07:26,229 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:07:26,229 INFO  L82        PathProgramCache]: Analyzing trace with hash 1361568454, now seen corresponding path program 1 times
[2019-10-13 18:07:26,229 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:07:26,229 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669561301]
[2019-10-13 18:07:26,230 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:07:26,230 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:07:26,230 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:07:26,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:26,411 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:26,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:26,608 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:26,794 INFO  L134       CoverageAnalysis]: Checked inductivity of 180 backedges. 177 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-13 18:07:26,794 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669561301]
[2019-10-13 18:07:26,795 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050860598]
[2019-10-13 18:07:26,795 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
[2019-10-13 18:07:26,915 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:07:26,918 INFO  L256         TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 18:07:26,932 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:07:27,064 INFO  L134       CoverageAnalysis]: Checked inductivity of 180 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:07:27,065 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:07:27,065 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11
[2019-10-13 18:07:27,065 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490567350]
[2019-10-13 18:07:27,067 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-13 18:07:27,067 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:07:27,067 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-13 18:07:27,068 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-13 18:07:27,068 INFO  L87              Difference]: Start difference. First operand 6509 states and 8974 transitions. Second operand 11 states.