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/Problem16_label57.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 22:05:09,755 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-14 22:05:09,758 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-14 22:05:09,836 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 22:05:09,860 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 22:05:09,860 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 22:05:09,864 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 22:05:09,865 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 22:05:09,866 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 22:05:09,866 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 22:05:09,866 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 22:05:09,866 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 22:05:09,866 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 22:05:09,867 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 22:05:09,868 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 22:05:09,868 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 22:05:09,868 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 22:05:09,869 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 22:05:09,869 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 22:05:09,869 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 22:05:09,869 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 22:05:09,869 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 22:05:09,870 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 22:05:09,870 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 22:05:09,870 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 22:05:09,870 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 22:05:09,870 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 22:05:09,871 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 22:05:09,871 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 22:05:09,871 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 22:05:09,871 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 22:05:09,871 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 22:05:09,871 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 22:05:10,161 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 22:05:10,182 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 22:05:10,186 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 22:05:10,187 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 22:05:10,188 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 22:05:10,188 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label57.c
[2019-10-14 22:05:10,259 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97edb30a/244a714352ef4b2582a4b628ae8a7c97/FLAG54c797832
[2019-10-14 22:05:10,906 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 22:05:10,907 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label57.c
[2019-10-14 22:05:10,929 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97edb30a/244a714352ef4b2582a4b628ae8a7c97/FLAG54c797832
[2019-10-14 22:05:11,077 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b97edb30a/244a714352ef4b2582a4b628ae8a7c97
[2019-10-14 22:05:11,088 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 22:05:11,092 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 22:05:11,093 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 22:05:11,093 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 22:05:11,097 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 22:05:11,098 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:11" (1/1) ...
[2019-10-14 22:05:11,102 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d60e989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:11, skipping insertion in model container
[2019-10-14 22:05:11,103 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:05:11" (1/1) ...
[2019-10-14 22:05:11,112 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 22:05:11,193 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 22:05:11,988 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:05:12,003 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 22:05:12,336 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:05:12,360 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 22:05:12,361 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12 WrapperNode
[2019-10-14 22:05:12,362 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 22:05:12,363 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 22:05:12,364 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 22:05:12,364 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 22:05:12,383 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12" (1/1) ...
[2019-10-14 22:05:12,384 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12" (1/1) ...
[2019-10-14 22:05:12,435 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12" (1/1) ...
[2019-10-14 22:05:12,437 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12" (1/1) ...
[2019-10-14 22:05:12,511 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12" (1/1) ...
[2019-10-14 22:05:12,542 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12" (1/1) ...
[2019-10-14 22:05:12,556 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12" (1/1) ...
[2019-10-14 22:05:12,572 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 22:05:12,573 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 22:05:12,573 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 22:05:12,573 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 22:05:12,574 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12" (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 22:05:12,646 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 22:05:12,646 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 22:05:12,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 22:05:12,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-14 22:05:12,647 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 22:05:12,648 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 22:05:12,648 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-14 22:05:12,648 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 22:05:12,649 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 22:05:12,649 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 22:05:12,649 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 22:05:12,649 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 22:05:12,650 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 22:05:14,981 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 22:05:14,982 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 22:05:14,987 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:14 BoogieIcfgContainer
[2019-10-14 22:05:14,991 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 22:05:14,992 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 22:05:14,993 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 22:05:14,997 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 22:05:14,997 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:05:11" (1/3) ...
[2019-10-14 22:05:14,999 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e78ab8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:14, skipping insertion in model container
[2019-10-14 22:05:14,999 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:05:12" (2/3) ...
[2019-10-14 22:05:14,999 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e78ab8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:05:14, skipping insertion in model container
[2019-10-14 22:05:15,000 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:05:14" (3/3) ...
[2019-10-14 22:05:15,009 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem16_label57.c
[2019-10-14 22:05:15,021 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 22:05:15,033 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 22:05:15,045 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 22:05:15,091 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 22:05:15,091 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 22:05:15,091 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 22:05:15,092 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 22:05:15,092 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 22:05:15,092 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 22:05:15,092 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 22:05:15,092 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 22:05:15,130 INFO  L276                IsEmpty]: Start isEmpty. Operand 409 states.
[2019-10-14 22:05:15,138 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2019-10-14 22:05:15,139 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:15,140 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]
[2019-10-14 22:05:15,142 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:15,147 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:15,147 INFO  L82        PathProgramCache]: Analyzing trace with hash 10915389, now seen corresponding path program 1 times
[2019-10-14 22:05:15,156 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:15,157 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204661911]
[2019-10-14 22:05:15,157 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:15,157 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:15,158 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:15,332 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:15,575 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:15,614 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 22:05:15,615 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204661911]
[2019-10-14 22:05:15,616 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 22:05:15,616 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 22:05:15,617 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98614253]
[2019-10-14 22:05:15,622 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:15,622 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:15,636 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:15,637 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 22:05:15,639 INFO  L87              Difference]: Start difference. First operand 409 states. Second operand 5 states.
[2019-10-14 22:05:20,682 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:20,682 INFO  L93              Difference]: Finished difference Result 1515 states and 2848 transitions.
[2019-10-14 22:05:20,683 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 22:05:20,684 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 46
[2019-10-14 22:05:20,685 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:20,711 INFO  L225             Difference]: With dead ends: 1515
[2019-10-14 22:05:20,712 INFO  L226             Difference]: Without dead ends: 1038
[2019-10-14 22:05:20,724 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
[2019-10-14 22:05:20,745 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1038 states.
[2019-10-14 22:05:20,870 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031.
[2019-10-14 22:05:20,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1031 states.
[2019-10-14 22:05:20,879 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1666 transitions.
[2019-10-14 22:05:20,882 INFO  L78                 Accepts]: Start accepts. Automaton has 1031 states and 1666 transitions. Word has length 46
[2019-10-14 22:05:20,884 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:20,884 INFO  L462      AbstractCegarLoop]: Abstraction has 1031 states and 1666 transitions.
[2019-10-14 22:05:20,884 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:05:20,885 INFO  L276                IsEmpty]: Start isEmpty. Operand 1031 states and 1666 transitions.
[2019-10-14 22:05:20,912 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 214
[2019-10-14 22:05:20,912 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:20,913 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, 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]
[2019-10-14 22:05:20,917 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:20,918 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:20,918 INFO  L82        PathProgramCache]: Analyzing trace with hash 626309048, now seen corresponding path program 1 times
[2019-10-14 22:05:20,918 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:20,918 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436012128]
[2019-10-14 22:05:20,918 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:20,919 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:20,919 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:20,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:21,046 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:21,094 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:21,228 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:21,334 INFO  L134       CoverageAnalysis]: Checked inductivity of 153 backedges. 78 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-14 22:05:21,334 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436012128]
[2019-10-14 22:05:21,334 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319093506]
[2019-10-14 22:05:21,335 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 22:05:21,453 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:21,456 INFO  L256         TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 22:05:21,469 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:21,604 INFO  L134       CoverageAnalysis]: Checked inductivity of 153 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2019-10-14 22:05:21,605 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:05:21,605 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9
[2019-10-14 22:05:21,605 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283888501]
[2019-10-14 22:05:21,610 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:21,611 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:21,611 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:21,611 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-14 22:05:21,612 INFO  L87              Difference]: Start difference. First operand 1031 states and 1666 transitions. Second operand 5 states.
[2019-10-14 22:05:25,130 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:25,131 INFO  L93              Difference]: Finished difference Result 3131 states and 5147 transitions.
[2019-10-14 22:05:25,131 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-14 22:05:25,132 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 213
[2019-10-14 22:05:25,132 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:25,147 INFO  L225             Difference]: With dead ends: 3131
[2019-10-14 22:05:25,147 INFO  L226             Difference]: Without dead ends: 2106
[2019-10-14 22:05:25,151 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132
[2019-10-14 22:05:25,154 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2106 states.
[2019-10-14 22:05:25,212 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2078.
[2019-10-14 22:05:25,213 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2078 states.
[2019-10-14 22:05:25,222 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2078 states to 2078 states and 3239 transitions.
[2019-10-14 22:05:25,223 INFO  L78                 Accepts]: Start accepts. Automaton has 2078 states and 3239 transitions. Word has length 213
[2019-10-14 22:05:25,223 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:25,223 INFO  L462      AbstractCegarLoop]: Abstraction has 2078 states and 3239 transitions.
[2019-10-14 22:05:25,224 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:05:25,224 INFO  L276                IsEmpty]: Start isEmpty. Operand 2078 states and 3239 transitions.
[2019-10-14 22:05:25,227 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 218
[2019-10-14 22:05:25,227 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:25,228 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, 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]
[2019-10-14 22:05:25,431 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:25,432 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:25,432 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:25,433 INFO  L82        PathProgramCache]: Analyzing trace with hash 537819504, now seen corresponding path program 1 times
[2019-10-14 22:05:25,434 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:25,434 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536268094]
[2019-10-14 22:05:25,434 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:25,435 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:25,435 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:25,468 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:25,571 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:25,606 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:25,691 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:25,765 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 78 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-14 22:05:25,766 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536268094]
[2019-10-14 22:05:25,766 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437531812]
[2019-10-14 22:05:25,766 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 22:05:25,866 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:25,868 INFO  L256         TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 22:05:25,874 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:25,950 INFO  L134       CoverageAnalysis]: Checked inductivity of 157 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2019-10-14 22:05:25,951 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:05:25,951 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-14 22:05:25,951 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781028192]
[2019-10-14 22:05:25,952 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:25,953 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:25,953 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:25,953 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 22:05:25,953 INFO  L87              Difference]: Start difference. First operand 2078 states and 3239 transitions. Second operand 5 states.
[2019-10-14 22:05:28,747 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:28,748 INFO  L93              Difference]: Finished difference Result 6302 states and 10079 transitions.
[2019-10-14 22:05:28,749 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-14 22:05:28,749 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 217
[2019-10-14 22:05:28,750 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:28,778 INFO  L225             Difference]: With dead ends: 6302
[2019-10-14 22:05:28,778 INFO  L226             Difference]: Without dead ends: 4230
[2019-10-14 22:05:28,785 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182
[2019-10-14 22:05:28,791 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4230 states.
[2019-10-14 22:05:28,925 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4230 to 4208.
[2019-10-14 22:05:28,925 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4208 states.
[2019-10-14 22:05:28,943 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 5867 transitions.
[2019-10-14 22:05:28,944 INFO  L78                 Accepts]: Start accepts. Automaton has 4208 states and 5867 transitions. Word has length 217
[2019-10-14 22:05:28,945 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:28,945 INFO  L462      AbstractCegarLoop]: Abstraction has 4208 states and 5867 transitions.
[2019-10-14 22:05:28,945 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:05:28,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 4208 states and 5867 transitions.
[2019-10-14 22:05:28,953 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 337
[2019-10-14 22:05:28,953 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:28,954 INFO  L380         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 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]
[2019-10-14 22:05:29,165 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:29,166 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:29,167 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:29,167 INFO  L82        PathProgramCache]: Analyzing trace with hash -1755403504, now seen corresponding path program 1 times
[2019-10-14 22:05:29,168 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:29,168 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80813412]
[2019-10-14 22:05:29,168 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:29,169 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:29,169 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:29,205 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,292 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,346 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,410 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,474 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,589 INFO  L134       CoverageAnalysis]: Checked inductivity of 374 backedges. 198 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked.
[2019-10-14 22:05:29,589 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80813412]
[2019-10-14 22:05:29,589 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268241092]
[2019-10-14 22:05:29,590 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:29,696 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:29,698 INFO  L256         TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 22:05:29,705 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:29,868 INFO  L134       CoverageAnalysis]: Checked inductivity of 374 backedges. 332 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2019-10-14 22:05:29,869 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 22:05:29,869 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11
[2019-10-14 22:05:29,869 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070860613]
[2019-10-14 22:05:29,870 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-14 22:05:29,870 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:29,871 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-14 22:05:29,871 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 22:05:29,871 INFO  L87              Difference]: Start difference. First operand 4208 states and 5867 transitions. Second operand 11 states.
[2019-10-14 22:05:34,416 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:34,418 INFO  L93              Difference]: Finished difference Result 10864 states and 15765 transitions.
[2019-10-14 22:05:34,419 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-10-14 22:05:34,419 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 336
[2019-10-14 22:05:34,421 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:34,451 INFO  L225             Difference]: With dead ends: 10864
[2019-10-14 22:05:34,451 INFO  L226             Difference]: Without dead ends: 6662
[2019-10-14 22:05:34,463 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 343 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240
[2019-10-14 22:05:34,470 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 6662 states.
[2019-10-14 22:05:34,601 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 6662 to 4591.
[2019-10-14 22:05:34,602 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4591 states.
[2019-10-14 22:05:34,613 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4591 states to 4591 states and 6444 transitions.
[2019-10-14 22:05:34,613 INFO  L78                 Accepts]: Start accepts. Automaton has 4591 states and 6444 transitions. Word has length 336
[2019-10-14 22:05:34,615 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:34,615 INFO  L462      AbstractCegarLoop]: Abstraction has 4591 states and 6444 transitions.
[2019-10-14 22:05:34,615 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-10-14 22:05:34,615 INFO  L276                IsEmpty]: Start isEmpty. Operand 4591 states and 6444 transitions.
[2019-10-14 22:05:34,624 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 413
[2019-10-14 22:05:34,625 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:34,625 INFO  L380         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 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 22:05:34,830 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:34,834 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:34,835 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:34,835 INFO  L82        PathProgramCache]: Analyzing trace with hash 1593066728, now seen corresponding path program 1 times
[2019-10-14 22:05:34,835 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:34,835 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313159460]
[2019-10-14 22:05:34,835 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:34,836 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:34,836 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:34,870 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:34,962 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:35,005 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:35,162 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:35,212 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:35,492 INFO  L134       CoverageAnalysis]: Checked inductivity of 463 backedges. 117 proven. 221 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked.
[2019-10-14 22:05:35,492 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313159460]
[2019-10-14 22:05:35,492 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133331519]
[2019-10-14 22:05:35,493 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:35,624 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:35,627 INFO  L256         TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 22:05:35,633 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:35,779 INFO  L134       CoverageAnalysis]: Checked inductivity of 463 backedges. 268 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked.
[2019-10-14 22:05:35,779 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:05:35,780 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-14 22:05:35,780 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629203137]
[2019-10-14 22:05:35,782 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:05:35,783 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:35,783 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:05:35,788 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 22:05:35,789 INFO  L87              Difference]: Start difference. First operand 4591 states and 6444 transitions. Second operand 5 states.
[2019-10-14 22:05:38,342 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:05:38,342 INFO  L93              Difference]: Finished difference Result 10581 states and 14860 transitions.
[2019-10-14 22:05:38,343 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-10-14 22:05:38,343 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 412
[2019-10-14 22:05:38,343 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:05:38,380 INFO  L225             Difference]: With dead ends: 10581
[2019-10-14 22:05:38,381 INFO  L226             Difference]: Without dead ends: 5996
[2019-10-14 22:05:38,392 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 414 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132
[2019-10-14 22:05:38,399 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5996 states.
[2019-10-14 22:05:38,534 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5996 to 5968.
[2019-10-14 22:05:38,534 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5968 states.
[2019-10-14 22:05:38,548 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5968 states to 5968 states and 7680 transitions.
[2019-10-14 22:05:38,549 INFO  L78                 Accepts]: Start accepts. Automaton has 5968 states and 7680 transitions. Word has length 412
[2019-10-14 22:05:38,549 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:05:38,557 INFO  L462      AbstractCegarLoop]: Abstraction has 5968 states and 7680 transitions.
[2019-10-14 22:05:38,557 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:05:38,558 INFO  L276                IsEmpty]: Start isEmpty. Operand 5968 states and 7680 transitions.
[2019-10-14 22:05:38,574 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 527
[2019-10-14 22:05:38,574 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:05:38,575 INFO  L380         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:05:38,788 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:38,788 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:05:38,788 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:05:38,789 INFO  L82        PathProgramCache]: Analyzing trace with hash -330925460, now seen corresponding path program 1 times
[2019-10-14 22:05:38,789 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:05:38,789 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833951802]
[2019-10-14 22:05:38,789 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:38,789 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:05:38,790 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:05:38,859 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:38,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:39,005 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:39,148 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:39,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:39,952 INFO  L134       CoverageAnalysis]: Checked inductivity of 463 backedges. 233 proven. 114 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked.
[2019-10-14 22:05:39,952 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833951802]
[2019-10-14 22:05:39,953 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564019420]
[2019-10-14 22:05:39,953 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:05:40,195 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:05:40,198 INFO  L256         TraceCheckSpWp]: Trace formula consists of 755 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 22:05:40,209 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:05:40,592 INFO  L134       CoverageAnalysis]: Checked inductivity of 463 backedges. 421 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2019-10-14 22:05:40,593 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 22:05:40,593 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11
[2019-10-14 22:05:40,594 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056515082]
[2019-10-14 22:05:40,595 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-10-14 22:05:40,596 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:05:40,596 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-10-14 22:05:40,596 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 22:05:40,596 INFO  L87              Difference]: Start difference. First operand 5968 states and 7680 transitions. Second operand 11 states.