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/Problem11_label21.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 21:58:58,304 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-14 21:58:58,306 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-14 21:58:58,386 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 21:58:58,399 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 21:58:58,400 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 21:58:58,401 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 21:58:58,401 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 21:58:58,401 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 21:58:58,401 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 21:58:58,402 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 21:58:58,402 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 21:58:58,402 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 21:58:58,402 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 21:58:58,402 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 21:58:58,403 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 21:58:58,403 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 21:58:58,403 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 21:58:58,403 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 21:58:58,403 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 21:58:58,403 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 21:58:58,404 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 21:58:58,404 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 21:58:58,404 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 21:58:58,404 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 21:58:58,404 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 21:58:58,405 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 21:58:58,405 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 21:58:58,405 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 21:58:58,405 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 21:58:58,405 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 21:58:58,406 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 21:58:58,406 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 21:58:58,691 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 21:58:58,707 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 21:58:58,711 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 21:58:58,712 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 21:58:58,713 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 21:58:58,714 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label21.c
[2019-10-14 21:58:58,783 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924e88908/198195a8e22a465f921ff61f24d923c0/FLAG2adacd89d
[2019-10-14 21:58:59,413 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 21:58:59,414 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label21.c
[2019-10-14 21:58:59,433 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924e88908/198195a8e22a465f921ff61f24d923c0/FLAG2adacd89d
[2019-10-14 21:58:59,616 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/924e88908/198195a8e22a465f921ff61f24d923c0
[2019-10-14 21:58:59,626 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 21:58:59,628 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 21:58:59,629 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 21:58:59,629 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 21:58:59,637 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 21:58:59,638 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:59" (1/1) ...
[2019-10-14 21:58:59,641 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71518f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:59, skipping insertion in model container
[2019-10-14 21:58:59,641 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:59" (1/1) ...
[2019-10-14 21:58:59,649 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 21:58:59,725 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 21:59:00,628 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:59:00,634 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 21:59:00,823 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:59:00,840 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 21:59:00,841 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00 WrapperNode
[2019-10-14 21:59:00,841 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 21:59:00,842 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 21:59:00,842 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 21:59:00,842 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 21:59:00,867 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00" (1/1) ...
[2019-10-14 21:59:00,867 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00" (1/1) ...
[2019-10-14 21:59:00,918 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00" (1/1) ...
[2019-10-14 21:59:00,918 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00" (1/1) ...
[2019-10-14 21:59:00,977 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00" (1/1) ...
[2019-10-14 21:59:00,990 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00" (1/1) ...
[2019-10-14 21:59:00,999 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00" (1/1) ...
[2019-10-14 21:59:01,014 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 21:59:01,015 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 21:59:01,018 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 21:59:01,018 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 21:59:01,020 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00" (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 21:59:01,095 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 21:59:01,095 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 21:59:01,096 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 21:59:01,096 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 21:59:01,096 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 21:59:01,096 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 21:59:01,096 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 21:59:01,097 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 21:59:01,098 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 21:59:01,098 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 21:59:01,098 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 21:59:03,154 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 21:59:03,154 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 21:59:03,156 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:03 BoogieIcfgContainer
[2019-10-14 21:59:03,156 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 21:59:03,158 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 21:59:03,158 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 21:59:03,161 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 21:59:03,161 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:58:59" (1/3) ...
[2019-10-14 21:59:03,162 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394af214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:03, skipping insertion in model container
[2019-10-14 21:59:03,162 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:00" (2/3) ...
[2019-10-14 21:59:03,163 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@394af214 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:03, skipping insertion in model container
[2019-10-14 21:59:03,163 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:03" (3/3) ...
[2019-10-14 21:59:03,165 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label21.c
[2019-10-14 21:59:03,175 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 21:59:03,189 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 21:59:03,201 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 21:59:03,243 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 21:59:03,243 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 21:59:03,244 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 21:59:03,244 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 21:59:03,244 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 21:59:03,245 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 21:59:03,245 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 21:59:03,245 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 21:59:03,278 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-10-14 21:59:03,286 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2019-10-14 21:59:03,286 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:03,287 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]
[2019-10-14 21:59:03,290 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:03,295 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:03,295 INFO  L82        PathProgramCache]: Analyzing trace with hash 1029260131, now seen corresponding path program 1 times
[2019-10-14 21:59:03,304 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:03,305 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224270059]
[2019-10-14 21:59:03,305 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:03,305 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:03,306 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:03,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:03,647 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:03,677 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 21:59:03,678 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224270059]
[2019-10-14 21:59:03,679 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:59:03,679 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 21:59:03,680 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217629470]
[2019-10-14 21:59:03,684 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:59:03,685 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:03,699 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:59:03,700 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 21:59:03,702 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-10-14 21:59:07,308 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:07,308 INFO  L93              Difference]: Finished difference Result 990 states and 1774 transitions.
[2019-10-14 21:59:07,309 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:59:07,310 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 30
[2019-10-14 21:59:07,310 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:07,331 INFO  L225             Difference]: With dead ends: 990
[2019-10-14 21:59:07,331 INFO  L226             Difference]: Without dead ends: 629
[2019-10-14 21:59:07,341 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
[2019-10-14 21:59:07,360 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 629 states.
[2019-10-14 21:59:07,437 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625.
[2019-10-14 21:59:07,439 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 625 states.
[2019-10-14 21:59:07,443 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions.
[2019-10-14 21:59:07,445 INFO  L78                 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 30
[2019-10-14 21:59:07,445 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:07,446 INFO  L462      AbstractCegarLoop]: Abstraction has 625 states and 865 transitions.
[2019-10-14 21:59:07,446 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:59:07,446 INFO  L276                IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions.
[2019-10-14 21:59:07,451 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 104
[2019-10-14 21:59:07,451 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:07,452 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:07,452 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:07,453 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:07,453 INFO  L82        PathProgramCache]: Analyzing trace with hash -27309419, now seen corresponding path program 1 times
[2019-10-14 21:59:07,453 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:07,454 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80948218]
[2019-10-14 21:59:07,454 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:07,454 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:07,454 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:07,561 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:07,750 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:07,832 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:07,924 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:07,925 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80948218]
[2019-10-14 21:59:07,925 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774220917]
[2019-10-14 21:59:07,925 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 21:59:07,998 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:08,001 INFO  L256         TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:59:08,010 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:08,066 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:08,066 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:59:08,067 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-14 21:59:08,067 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613715970]
[2019-10-14 21:59:08,069 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:59:08,069 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:08,070 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:59:08,070 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:08,070 INFO  L87              Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 3 states.
[2019-10-14 21:59:09,243 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:09,243 INFO  L93              Difference]: Finished difference Result 1826 states and 2564 transitions.
[2019-10-14 21:59:09,244 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:59:09,244 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 103
[2019-10-14 21:59:09,245 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:09,255 INFO  L225             Difference]: With dead ends: 1826
[2019-10-14 21:59:09,255 INFO  L226             Difference]: Without dead ends: 1207
[2019-10-14 21:59:09,258 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:09,260 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1207 states.
[2019-10-14 21:59:09,315 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1197.
[2019-10-14 21:59:09,315 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1197 states.
[2019-10-14 21:59:09,321 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1562 transitions.
[2019-10-14 21:59:09,321 INFO  L78                 Accepts]: Start accepts. Automaton has 1197 states and 1562 transitions. Word has length 103
[2019-10-14 21:59:09,322 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:09,322 INFO  L462      AbstractCegarLoop]: Abstraction has 1197 states and 1562 transitions.
[2019-10-14 21:59:09,322 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:59:09,322 INFO  L276                IsEmpty]: Start isEmpty. Operand 1197 states and 1562 transitions.
[2019-10-14 21:59:09,327 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 105
[2019-10-14 21:59:09,327 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:09,328 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:09,536 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:09,536 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:09,536 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:09,537 INFO  L82        PathProgramCache]: Analyzing trace with hash 1916245598, now seen corresponding path program 1 times
[2019-10-14 21:59:09,537 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:09,537 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854428819]
[2019-10-14 21:59:09,537 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:09,537 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:09,538 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:09,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:09,664 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:09,704 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:09,760 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:09,761 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854428819]
[2019-10-14 21:59:09,762 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761230935]
[2019-10-14 21:59:09,763 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 21:59:09,847 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:09,849 INFO  L256         TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-10-14 21:59:09,868 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:09,923 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-14 21:59:09,966 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:09,966 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:59:09,966 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9
[2019-10-14 21:59:09,967 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560919305]
[2019-10-14 21:59:09,967 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:59:09,968 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:09,968 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:59:09,968 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2019-10-14 21:59:09,968 INFO  L87              Difference]: Start difference. First operand 1197 states and 1562 transitions. Second operand 5 states.
[2019-10-14 21:59:11,694 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:11,695 INFO  L93              Difference]: Finished difference Result 2626 states and 3466 transitions.
[2019-10-14 21:59:11,697 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2019-10-14 21:59:11,697 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 104
[2019-10-14 21:59:11,698 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:11,707 INFO  L225             Difference]: With dead ends: 2626
[2019-10-14 21:59:11,707 INFO  L226             Difference]: Without dead ends: 1435
[2019-10-14 21:59:11,711 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132
[2019-10-14 21:59:11,713 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1435 states.
[2019-10-14 21:59:11,753 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1416.
[2019-10-14 21:59:11,753 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1416 states.
[2019-10-14 21:59:11,759 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 1825 transitions.
[2019-10-14 21:59:11,760 INFO  L78                 Accepts]: Start accepts. Automaton has 1416 states and 1825 transitions. Word has length 104
[2019-10-14 21:59:11,760 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:11,760 INFO  L462      AbstractCegarLoop]: Abstraction has 1416 states and 1825 transitions.
[2019-10-14 21:59:11,761 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:59:11,761 INFO  L276                IsEmpty]: Start isEmpty. Operand 1416 states and 1825 transitions.
[2019-10-14 21:59:11,765 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 162
[2019-10-14 21:59:11,765 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:11,765 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:59:11,976 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:11,976 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:11,977 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:11,977 INFO  L82        PathProgramCache]: Analyzing trace with hash -1980771380, now seen corresponding path program 1 times
[2019-10-14 21:59:11,977 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:11,977 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851512389]
[2019-10-14 21:59:11,977 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:11,978 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:11,978 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:12,028 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:12,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:12,238 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:12,323 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 22 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:12,323 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851512389]
[2019-10-14 21:59:12,324 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911241414]
[2019-10-14 21:59:12,324 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 21:59:12,401 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:12,403 INFO  L256         TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:59:12,407 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:12,454 INFO  L134       CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:12,455 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:59:12,455 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-14 21:59:12,455 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260551332]
[2019-10-14 21:59:12,456 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:59:12,456 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:12,456 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:59:12,457 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:12,457 INFO  L87              Difference]: Start difference. First operand 1416 states and 1825 transitions. Second operand 3 states.
[2019-10-14 21:59:13,512 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:13,513 INFO  L93              Difference]: Finished difference Result 3607 states and 4769 transitions.
[2019-10-14 21:59:13,515 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:59:13,516 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 161
[2019-10-14 21:59:13,517 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:13,528 INFO  L225             Difference]: With dead ends: 3607
[2019-10-14 21:59:13,528 INFO  L226             Difference]: Without dead ends: 2197
[2019-10-14 21:59:13,532 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:13,535 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2197 states.
[2019-10-14 21:59:13,585 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1995.
[2019-10-14 21:59:13,586 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1995 states.
[2019-10-14 21:59:13,595 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 2622 transitions.
[2019-10-14 21:59:13,595 INFO  L78                 Accepts]: Start accepts. Automaton has 1995 states and 2622 transitions. Word has length 161
[2019-10-14 21:59:13,596 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:13,596 INFO  L462      AbstractCegarLoop]: Abstraction has 1995 states and 2622 transitions.
[2019-10-14 21:59:13,596 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:59:13,596 INFO  L276                IsEmpty]: Start isEmpty. Operand 1995 states and 2622 transitions.
[2019-10-14 21:59:13,599 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 177
[2019-10-14 21:59:13,599 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:13,600 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, 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]
[2019-10-14 21:59:13,803 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:13,804 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:13,805 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:13,805 INFO  L82        PathProgramCache]: Analyzing trace with hash 943896253, now seen corresponding path program 1 times
[2019-10-14 21:59:13,806 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:13,806 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911432908]
[2019-10-14 21:59:13,807 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:13,807 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:13,807 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:13,831 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:13,916 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:13,951 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:14,044 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:14,120 INFO  L134       CoverageAnalysis]: Checked inductivity of 118 backedges. 46 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-14 21:59:14,121 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911432908]
[2019-10-14 21:59:14,121 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563422299]
[2019-10-14 21:59:14,121 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 21:59:14,210 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:14,212 INFO  L256         TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 21:59:14,215 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:14,320 INFO  L134       CoverageAnalysis]: Checked inductivity of 118 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked.
[2019-10-14 21:59:14,321 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:59:14,323 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-14 21:59:14,323 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263187756]
[2019-10-14 21:59:14,324 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:59:14,327 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:14,328 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:59:14,329 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-14 21:59:14,329 INFO  L87              Difference]: Start difference. First operand 1995 states and 2622 transitions. Second operand 5 states.
[2019-10-14 21:59:16,155 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:16,156 INFO  L93              Difference]: Finished difference Result 4832 states and 6597 transitions.
[2019-10-14 21:59:16,157 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:59:16,158 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 176
[2019-10-14 21:59:16,162 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:16,180 INFO  L225             Difference]: With dead ends: 4832
[2019-10-14 21:59:16,180 INFO  L226             Difference]: Without dead ends: 2843
[2019-10-14 21:59:16,186 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 177 SyntacticMatches, 0 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 21:59:16,190 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2843 states.
[2019-10-14 21:59:16,261 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2843 to 2805.
[2019-10-14 21:59:16,262 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2805 states.
[2019-10-14 21:59:16,272 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2805 states to 2805 states and 3710 transitions.
[2019-10-14 21:59:16,273 INFO  L78                 Accepts]: Start accepts. Automaton has 2805 states and 3710 transitions. Word has length 176
[2019-10-14 21:59:16,273 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:16,273 INFO  L462      AbstractCegarLoop]: Abstraction has 2805 states and 3710 transitions.
[2019-10-14 21:59:16,273 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:59:16,274 INFO  L276                IsEmpty]: Start isEmpty. Operand 2805 states and 3710 transitions.
[2019-10-14 21:59:16,277 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 221
[2019-10-14 21:59:16,277 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:16,277 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, 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]
[2019-10-14 21:59:16,482 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:16,482 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:16,483 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:16,483 INFO  L82        PathProgramCache]: Analyzing trace with hash 2096041879, now seen corresponding path program 1 times
[2019-10-14 21:59:16,484 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:16,485 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719818649]
[2019-10-14 21:59:16,485 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:16,486 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:16,486 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:16,535 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,656 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,680 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,742 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,833 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked.
[2019-10-14 21:59:16,834 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719818649]
[2019-10-14 21:59:16,834 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463901640]
[2019-10-14 21:59:16,835 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 21:59:16,973 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,975 INFO  L256         TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 15 conjunts are in the unsatisfiable core
[2019-10-14 21:59:16,981 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:17,092 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-14 21:59:17,093 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,094 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,094 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,095 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,096 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,097 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,099 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,100 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,101 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,102 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,103 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,104 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,104 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,106 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,107 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,108 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,110 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,111 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,112 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,113 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,114 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,115 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,116 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,117 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,118 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,119 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,120 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,121 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,122 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,123 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,125 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,126 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,457 WARN  L191               SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 48
[2019-10-14 21:59:17,462 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:17,647 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 71 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:17,648 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:17,648 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13
[2019-10-14 21:59:17,648 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362361414]
[2019-10-14 21:59:17,650 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 13 states
[2019-10-14 21:59:17,650 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:17,650 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2019-10-14 21:59:17,651 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156
[2019-10-14 21:59:17,651 INFO  L87              Difference]: Start difference. First operand 2805 states and 3710 transitions. Second operand 13 states.
[2019-10-14 21:59:25,857 WARN  L191               SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 63
[2019-10-14 21:59:29,907 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:29,907 INFO  L93              Difference]: Finished difference Result 15530 states and 22816 transitions.
[2019-10-14 21:59:29,908 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. 
[2019-10-14 21:59:29,908 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 220
[2019-10-14 21:59:29,909 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:29,985 INFO  L225             Difference]: With dead ends: 15530
[2019-10-14 21:59:29,985 INFO  L226             Difference]: Without dead ends: 12919
[2019-10-14 21:59:30,001 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=713, Invalid=2593, Unknown=0, NotChecked=0, Total=3306
[2019-10-14 21:59:30,014 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12919 states.
[2019-10-14 21:59:30,352 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12919 to 10316.
[2019-10-14 21:59:30,356 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 10316 states.
[2019-10-14 21:59:30,381 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 10316 states to 10316 states and 13348 transitions.
[2019-10-14 21:59:30,381 INFO  L78                 Accepts]: Start accepts. Automaton has 10316 states and 13348 transitions. Word has length 220
[2019-10-14 21:59:30,382 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:30,382 INFO  L462      AbstractCegarLoop]: Abstraction has 10316 states and 13348 transitions.
[2019-10-14 21:59:30,382 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2019-10-14 21:59:30,382 INFO  L276                IsEmpty]: Start isEmpty. Operand 10316 states and 13348 transitions.
[2019-10-14 21:59:30,395 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 326
[2019-10-14 21:59:30,395 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:30,396 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, 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, 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]
[2019-10-14 21:59:30,608 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:30,609 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:30,609 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:30,609 INFO  L82        PathProgramCache]: Analyzing trace with hash -675949199, now seen corresponding path program 1 times
[2019-10-14 21:59:30,609 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:30,609 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625089140]
[2019-10-14 21:59:30,610 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:30,610 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:30,610 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:30,683 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:30,795 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:30,813 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:30,861 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:30,902 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:31,122 INFO  L134       CoverageAnalysis]: Checked inductivity of 333 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked.
[2019-10-14 21:59:31,123 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625089140]
[2019-10-14 21:59:31,123 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786676086]
[2019-10-14 21:59:31,123 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:31,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:31,237 INFO  L256         TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:59:31,243 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:31,307 INFO  L134       CoverageAnalysis]: Checked inductivity of 333 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 258 trivial. 0 not checked.
[2019-10-14 21:59:31,307 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:59:31,307 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9
[2019-10-14 21:59:31,308 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56427366]
[2019-10-14 21:59:31,308 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:59:31,308 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:31,308 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:59:31,309 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2019-10-14 21:59:31,309 INFO  L87              Difference]: Start difference. First operand 10316 states and 13348 transitions. Second operand 3 states.
[2019-10-14 21:59:32,542 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:32,543 INFO  L93              Difference]: Finished difference Result 22331 states and 29475 transitions.
[2019-10-14 21:59:32,543 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:59:32,543 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 325
[2019-10-14 21:59:32,544 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:32,591 INFO  L225             Difference]: With dead ends: 22331
[2019-10-14 21:59:32,591 INFO  L226             Difference]: Without dead ends: 12021
[2019-10-14 21:59:32,614 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 330 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72
[2019-10-14 21:59:32,626 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12021 states.
[2019-10-14 21:59:32,869 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12021 to 12021.
[2019-10-14 21:59:32,870 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12021 states.
[2019-10-14 21:59:32,892 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12021 states to 12021 states and 15690 transitions.
[2019-10-14 21:59:32,893 INFO  L78                 Accepts]: Start accepts. Automaton has 12021 states and 15690 transitions. Word has length 325
[2019-10-14 21:59:32,895 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:32,895 INFO  L462      AbstractCegarLoop]: Abstraction has 12021 states and 15690 transitions.
[2019-10-14 21:59:32,895 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:59:32,895 INFO  L276                IsEmpty]: Start isEmpty. Operand 12021 states and 15690 transitions.
[2019-10-14 21:59:32,928 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 402
[2019-10-14 21:59:32,928 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:32,929 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, 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, 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]
[2019-10-14 21:59:33,134 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:33,136 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:33,136 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:33,136 INFO  L82        PathProgramCache]: Analyzing trace with hash 1454489130, now seen corresponding path program 1 times
[2019-10-14 21:59:33,136 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:33,137 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534226322]
[2019-10-14 21:59:33,137 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:33,137 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:33,137 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:33,209 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:33,329 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:33,354 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:33,398 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:33,457 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:33,771 INFO  L134       CoverageAnalysis]: Checked inductivity of 357 backedges. 72 proven. 3 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked.
[2019-10-14 21:59:33,771 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534226322]
[2019-10-14 21:59:33,771 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566282937]
[2019-10-14 21:59:33,772 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:33,915 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:33,917 INFO  L256         TraceCheckSpWp]: Trace formula consists of 649 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 21:59:33,922 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:34,050 INFO  L134       CoverageAnalysis]: Checked inductivity of 357 backedges. 248 proven. 22 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked.
[2019-10-14 21:59:34,050 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:34,051 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7
[2019-10-14 21:59:34,051 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592014595]
[2019-10-14 21:59:34,052 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-10-14 21:59:34,052 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:34,052 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-10-14 21:59:34,053 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:34,053 INFO  L87              Difference]: Start difference. First operand 12021 states and 15690 transitions. Second operand 7 states.