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_label12.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 21:58:32,530 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-14 21:58:32,533 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-14 21:58:32,589 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 21:58:32,609 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 21:58:32,610 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 21:58:32,612 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 21:58:32,612 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 21:58:32,612 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 21:58:32,612 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 21:58:32,613 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 21:58:32,613 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 21:58:32,613 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 21:58:32,613 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 21:58:32,614 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 21:58:32,614 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 21:58:32,615 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 21:58:32,615 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 21:58:32,615 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 21:58:32,615 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 21:58:32,616 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 21:58:32,616 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 21:58:32,616 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 21:58:32,616 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 21:58:32,617 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 21:58:32,617 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 21:58:32,617 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 21:58:32,617 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 21:58:32,617 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 21:58:32,618 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 21:58:32,618 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 21:58:32,618 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 21:58:32,618 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 21:58:32,919 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 21:58:32,932 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 21:58:32,936 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 21:58:32,937 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 21:58:32,938 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 21:58:32,939 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label12.c
[2019-10-14 21:58:33,013 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d5e4188/c7146c3daf3448aaa26eb81277993fea/FLAG668b621e8
[2019-10-14 21:58:33,683 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 21:58:33,684 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label12.c
[2019-10-14 21:58:33,699 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d5e4188/c7146c3daf3448aaa26eb81277993fea/FLAG668b621e8
[2019-10-14 21:58:33,879 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4d5e4188/c7146c3daf3448aaa26eb81277993fea
[2019-10-14 21:58:33,888 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 21:58:33,890 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 21:58:33,893 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 21:58:33,893 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 21:58:33,897 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 21:58:33,898 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:33" (1/1) ...
[2019-10-14 21:58:33,901 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5627da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:33, skipping insertion in model container
[2019-10-14 21:58:33,901 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:58:33" (1/1) ...
[2019-10-14 21:58:33,910 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 21:58:33,975 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 21:58:34,705 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:58:34,710 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 21:58:34,934 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:58:34,957 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 21:58:34,957 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34 WrapperNode
[2019-10-14 21:58:34,958 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 21:58:34,959 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 21:58:34,959 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 21:58:34,959 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 21:58:34,974 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ...
[2019-10-14 21:58:34,975 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ...
[2019-10-14 21:58:35,005 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ...
[2019-10-14 21:58:35,006 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ...
[2019-10-14 21:58:35,079 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ...
[2019-10-14 21:58:35,106 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ...
[2019-10-14 21:58:35,122 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (1/1) ...
[2019-10-14 21:58:35,135 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 21:58:35,136 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 21:58:35,136 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 21:58:35,137 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 21:58:35,138 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (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 21:58:35,208 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 21:58:35,208 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 21:58:35,208 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 21:58:35,208 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 21:58:35,209 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 21:58:35,210 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 21:58:35,210 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 21:58:35,210 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 21:58:35,210 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 21:58:35,210 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 21:58:35,210 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 21:58:37,185 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 21:58:37,185 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 21:58:37,187 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:37 BoogieIcfgContainer
[2019-10-14 21:58:37,188 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 21:58:37,189 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 21:58:37,190 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 21:58:37,194 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 21:58:37,195 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:58:33" (1/3) ...
[2019-10-14 21:58:37,196 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aee9096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:37, skipping insertion in model container
[2019-10-14 21:58:37,196 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:58:34" (2/3) ...
[2019-10-14 21:58:37,197 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aee9096 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:58:37, skipping insertion in model container
[2019-10-14 21:58:37,197 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:58:37" (3/3) ...
[2019-10-14 21:58:37,199 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label12.c
[2019-10-14 21:58:37,214 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 21:58:37,226 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 21:58:37,242 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 21:58:37,280 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 21:58:37,281 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 21:58:37,281 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 21:58:37,281 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 21:58:37,282 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 21:58:37,282 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 21:58:37,282 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 21:58:37,283 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 21:58:37,324 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-10-14 21:58:37,334 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2019-10-14 21:58:37,334 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:37,335 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]
[2019-10-14 21:58:37,337 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:37,344 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:37,344 INFO  L82        PathProgramCache]: Analyzing trace with hash 1842297178, now seen corresponding path program 1 times
[2019-10-14 21:58:37,355 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:37,356 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219152346]
[2019-10-14 21:58:37,356 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:37,356 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:37,356 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:37,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:37,792 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:37,877 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 21:58:37,878 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219152346]
[2019-10-14 21:58:37,879 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:58:37,879 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 21:58:37,879 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027209542]
[2019-10-14 21:58:37,886 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:58:37,887 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:37,906 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:58:37,907 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 21:58:37,910 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-10-14 21:58:41,197 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:41,198 INFO  L93              Difference]: Finished difference Result 1004 states and 1802 transitions.
[2019-10-14 21:58:41,199 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:58:41,200 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 31
[2019-10-14 21:58:41,201 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:41,231 INFO  L225             Difference]: With dead ends: 1004
[2019-10-14 21:58:41,231 INFO  L226             Difference]: Without dead ends: 644
[2019-10-14 21:58:41,241 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 21:58:41,260 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 644 states.
[2019-10-14 21:58:41,334 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 623.
[2019-10-14 21:58:41,335 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 623 states.
[2019-10-14 21:58:41,339 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 957 transitions.
[2019-10-14 21:58:41,341 INFO  L78                 Accepts]: Start accepts. Automaton has 623 states and 957 transitions. Word has length 31
[2019-10-14 21:58:41,342 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:41,342 INFO  L462      AbstractCegarLoop]: Abstraction has 623 states and 957 transitions.
[2019-10-14 21:58:41,342 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:58:41,342 INFO  L276                IsEmpty]: Start isEmpty. Operand 623 states and 957 transitions.
[2019-10-14 21:58:41,347 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 107
[2019-10-14 21:58:41,348 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:41,348 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:41,348 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:41,349 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:41,349 INFO  L82        PathProgramCache]: Analyzing trace with hash 1072563117, now seen corresponding path program 1 times
[2019-10-14 21:58:41,349 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:41,349 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826884107]
[2019-10-14 21:58:41,350 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:41,350 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:41,350 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:41,418 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:41,524 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:41,572 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:41,722 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:58:41,723 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826884107]
[2019-10-14 21:58:41,724 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:58:41,724 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-14 21:58:41,724 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572988713]
[2019-10-14 21:58:41,731 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-10-14 21:58:41,731 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:41,731 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-10-14 21:58:41,732 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:58:41,733 INFO  L87              Difference]: Start difference. First operand 623 states and 957 transitions. Second operand 7 states.
[2019-10-14 21:58:44,450 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:44,451 INFO  L93              Difference]: Finished difference Result 1867 states and 2956 transitions.
[2019-10-14 21:58:44,451 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2019-10-14 21:58:44,452 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 106
[2019-10-14 21:58:44,452 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:44,462 INFO  L225             Difference]: With dead ends: 1867
[2019-10-14 21:58:44,463 INFO  L226             Difference]: Without dead ends: 1250
[2019-10-14 21:58:44,466 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2019-10-14 21:58:44,468 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1250 states.
[2019-10-14 21:58:44,527 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1020.
[2019-10-14 21:58:44,527 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1020 states.
[2019-10-14 21:58:44,536 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1452 transitions.
[2019-10-14 21:58:44,536 INFO  L78                 Accepts]: Start accepts. Automaton has 1020 states and 1452 transitions. Word has length 106
[2019-10-14 21:58:44,537 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:44,537 INFO  L462      AbstractCegarLoop]: Abstraction has 1020 states and 1452 transitions.
[2019-10-14 21:58:44,537 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-10-14 21:58:44,537 INFO  L276                IsEmpty]: Start isEmpty. Operand 1020 states and 1452 transitions.
[2019-10-14 21:58:44,553 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 120
[2019-10-14 21:58:44,553 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:44,554 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:44,554 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:44,554 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:44,554 INFO  L82        PathProgramCache]: Analyzing trace with hash -329605510, now seen corresponding path program 1 times
[2019-10-14 21:58:44,555 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:44,555 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847635240]
[2019-10-14 21:58:44,556 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:44,557 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:44,557 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:44,622 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:44,726 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:44,762 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:44,876 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:58:44,876 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847635240]
[2019-10-14 21:58:44,877 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:58:44,877 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-14 21:58:44,877 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428799116]
[2019-10-14 21:58:44,878 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-14 21:58:44,878 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:44,878 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-14 21:58:44,879 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-14 21:58:44,879 INFO  L87              Difference]: Start difference. First operand 1020 states and 1452 transitions. Second operand 8 states.
[2019-10-14 21:58:47,830 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:47,830 INFO  L93              Difference]: Finished difference Result 3063 states and 4491 transitions.
[2019-10-14 21:58:47,831 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2019-10-14 21:58:47,832 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 119
[2019-10-14 21:58:47,832 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:47,846 INFO  L225             Difference]: With dead ends: 3063
[2019-10-14 21:58:47,847 INFO  L226             Difference]: Without dead ends: 2049
[2019-10-14 21:58:47,851 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-10-14 21:58:47,853 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2049 states.
[2019-10-14 21:58:47,914 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1822.
[2019-10-14 21:58:47,915 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1822 states.
[2019-10-14 21:58:47,922 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1822 states to 1822 states and 2445 transitions.
[2019-10-14 21:58:47,923 INFO  L78                 Accepts]: Start accepts. Automaton has 1822 states and 2445 transitions. Word has length 119
[2019-10-14 21:58:47,923 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:47,924 INFO  L462      AbstractCegarLoop]: Abstraction has 1822 states and 2445 transitions.
[2019-10-14 21:58:47,924 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-14 21:58:47,924 INFO  L276                IsEmpty]: Start isEmpty. Operand 1822 states and 2445 transitions.
[2019-10-14 21:58:47,927 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 163
[2019-10-14 21:58:47,927 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:47,928 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:58:47,928 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:47,928 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:47,928 INFO  L82        PathProgramCache]: Analyzing trace with hash 1681837426, now seen corresponding path program 1 times
[2019-10-14 21:58:47,929 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:47,929 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747704153]
[2019-10-14 21:58:47,929 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:47,929 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:47,929 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:47,962 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:48,046 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:48,082 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:48,154 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:58:48,155 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747704153]
[2019-10-14 21:58:48,155 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588465836]
[2019-10-14 21:58:48,156 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 21:58:48,253 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:48,256 INFO  L256         TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:58:48,282 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:58:48,384 INFO  L134       CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:58:48,385 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:58:48,385 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7
[2019-10-14 21:58:48,385 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185099318]
[2019-10-14 21:58:48,387 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:58:48,388 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:48,388 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:58:48,389 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:58:48,390 INFO  L87              Difference]: Start difference. First operand 1822 states and 2445 transitions. Second operand 3 states.
[2019-10-14 21:58:49,714 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:49,715 INFO  L93              Difference]: Finished difference Result 4442 states and 6217 transitions.
[2019-10-14 21:58:49,715 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:58:49,716 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 162
[2019-10-14 21:58:49,717 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:49,732 INFO  L225             Difference]: With dead ends: 4442
[2019-10-14 21:58:49,732 INFO  L226             Difference]: Without dead ends: 2814
[2019-10-14 21:58:49,738 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:58:49,741 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2814 states.
[2019-10-14 21:58:49,812 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2814 to 2809.
[2019-10-14 21:58:49,812 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2809 states.
[2019-10-14 21:58:49,823 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2809 states to 2809 states and 3803 transitions.
[2019-10-14 21:58:49,824 INFO  L78                 Accepts]: Start accepts. Automaton has 2809 states and 3803 transitions. Word has length 162
[2019-10-14 21:58:49,824 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:49,825 INFO  L462      AbstractCegarLoop]: Abstraction has 2809 states and 3803 transitions.
[2019-10-14 21:58:49,825 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:58:49,825 INFO  L276                IsEmpty]: Start isEmpty. Operand 2809 states and 3803 transitions.
[2019-10-14 21:58:49,829 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 188
[2019-10-14 21:58:49,829 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:49,830 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, 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]
[2019-10-14 21:58:50,034 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:58:50,034 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:50,035 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:50,035 INFO  L82        PathProgramCache]: Analyzing trace with hash 1420666926, now seen corresponding path program 1 times
[2019-10-14 21:58:50,036 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:50,037 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811244326]
[2019-10-14 21:58:50,037 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:50,037 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:50,038 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:50,072 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:50,145 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:50,172 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:50,227 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:50,384 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-14 21:58:50,385 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811244326]
[2019-10-14 21:58:50,386 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74260824]
[2019-10-14 21:58:50,386 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 21:58:50,531 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:50,533 INFO  L256         TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-10-14 21:58:50,539 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:58:50,612 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 119 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:58:50,613 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:58:50,613 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9
[2019-10-14 21:58:50,614 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702464139]
[2019-10-14 21:58:50,614 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-10-14 21:58:50,615 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:50,615 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-10-14 21:58:50,615 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-10-14 21:58:50,616 INFO  L87              Difference]: Start difference. First operand 2809 states and 3803 transitions. Second operand 9 states.
[2019-10-14 21:58:52,949 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:52,950 INFO  L93              Difference]: Finished difference Result 5448 states and 7595 transitions.
[2019-10-14 21:58:52,950 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-10-14 21:58:52,951 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 187
[2019-10-14 21:58:52,952 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:52,966 INFO  L225             Difference]: With dead ends: 5448
[2019-10-14 21:58:52,966 INFO  L226             Difference]: Without dead ends: 2833
[2019-10-14 21:58:52,974 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-10-14 21:58:52,978 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2833 states.
[2019-10-14 21:58:53,041 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2833 to 2788.
[2019-10-14 21:58:53,042 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2788 states.
[2019-10-14 21:58:53,051 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 3468 transitions.
[2019-10-14 21:58:53,051 INFO  L78                 Accepts]: Start accepts. Automaton has 2788 states and 3468 transitions. Word has length 187
[2019-10-14 21:58:53,052 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:53,052 INFO  L462      AbstractCegarLoop]: Abstraction has 2788 states and 3468 transitions.
[2019-10-14 21:58:53,052 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-10-14 21:58:53,052 INFO  L276                IsEmpty]: Start isEmpty. Operand 2788 states and 3468 transitions.
[2019-10-14 21:58:53,056 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 193
[2019-10-14 21:58:53,056 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:53,057 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, 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]
[2019-10-14 21:58:53,260 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:58:53,261 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:53,261 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:53,262 INFO  L82        PathProgramCache]: Analyzing trace with hash 1590808865, now seen corresponding path program 1 times
[2019-10-14 21:58:53,262 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:53,263 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870466711]
[2019-10-14 21:58:53,263 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:53,263 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:53,263 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:53,300 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:53,380 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:53,399 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:53,429 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:53,486 INFO  L134       CoverageAnalysis]: Checked inductivity of 122 backedges. 49 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked.
[2019-10-14 21:58:53,486 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870466711]
[2019-10-14 21:58:53,495 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317966089]
[2019-10-14 21:58:53,496 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 21:58:53,588 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:53,591 INFO  L256         TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:58:53,599 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:58:53,631 INFO  L134       CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked.
[2019-10-14 21:58:53,632 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:58:53,632 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 6
[2019-10-14 21:58:53,632 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143842229]
[2019-10-14 21:58:53,633 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:58:53,633 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:53,634 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:58:53,634 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-14 21:58:53,634 INFO  L87              Difference]: Start difference. First operand 2788 states and 3468 transitions. Second operand 3 states.
[2019-10-14 21:58:54,551 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:54,551 INFO  L93              Difference]: Finished difference Result 6145 states and 7716 transitions.
[2019-10-14 21:58:54,555 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:58:54,557 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 192
[2019-10-14 21:58:54,557 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:54,573 INFO  L225             Difference]: With dead ends: 6145
[2019-10-14 21:58:54,574 INFO  L226             Difference]: Without dead ends: 3551
[2019-10-14 21:58:54,581 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-14 21:58:54,585 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3551 states.
[2019-10-14 21:58:54,664 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 3359.
[2019-10-14 21:58:54,665 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3359 states.
[2019-10-14 21:58:54,672 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3359 states to 3359 states and 4181 transitions.
[2019-10-14 21:58:54,673 INFO  L78                 Accepts]: Start accepts. Automaton has 3359 states and 4181 transitions. Word has length 192
[2019-10-14 21:58:54,673 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:54,673 INFO  L462      AbstractCegarLoop]: Abstraction has 3359 states and 4181 transitions.
[2019-10-14 21:58:54,673 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:58:54,674 INFO  L276                IsEmpty]: Start isEmpty. Operand 3359 states and 4181 transitions.
[2019-10-14 21:58:54,681 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 271
[2019-10-14 21:58:54,681 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:54,682 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:58:54,888 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:58:54,888 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:54,889 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:54,889 INFO  L82        PathProgramCache]: Analyzing trace with hash -310950367, now seen corresponding path program 1 times
[2019-10-14 21:58:54,889 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:54,889 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417421900]
[2019-10-14 21:58:54,889 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:54,890 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:54,890 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:54,961 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:55,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:55,135 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:55,226 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:55,591 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 5 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-14 21:58:55,591 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417421900]
[2019-10-14 21:58:55,591 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930335479]
[2019-10-14 21:58:55,591 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 21:58:55,690 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:55,691 INFO  L256         TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-10-14 21:58:55,696 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:58:55,752 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-14 21:58:55,852 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2019-10-14 21:58:55,853 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:58:55,854 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 17
[2019-10-14 21:58:55,854 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386563752]
[2019-10-14 21:58:55,855 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:58:55,856 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:55,856 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:58:55,857 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272
[2019-10-14 21:58:55,857 INFO  L87              Difference]: Start difference. First operand 3359 states and 4181 transitions. Second operand 5 states.
[2019-10-14 21:58:57,306 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:58:57,307 INFO  L93              Difference]: Finished difference Result 6785 states and 8535 transitions.
[2019-10-14 21:58:57,307 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:58:57,307 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 270
[2019-10-14 21:58:57,307 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:58:57,322 INFO  L225             Difference]: With dead ends: 6785
[2019-10-14 21:58:57,322 INFO  L226             Difference]: Without dead ends: 3620
[2019-10-14 21:58:57,330 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342
[2019-10-14 21:58:57,334 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3620 states.
[2019-10-14 21:58:57,465 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 3561.
[2019-10-14 21:58:57,465 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3561 states.
[2019-10-14 21:58:57,474 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3561 states to 3561 states and 4404 transitions.
[2019-10-14 21:58:57,475 INFO  L78                 Accepts]: Start accepts. Automaton has 3561 states and 4404 transitions. Word has length 270
[2019-10-14 21:58:57,475 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:58:57,475 INFO  L462      AbstractCegarLoop]: Abstraction has 3561 states and 4404 transitions.
[2019-10-14 21:58:57,475 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:58:57,476 INFO  L276                IsEmpty]: Start isEmpty. Operand 3561 states and 4404 transitions.
[2019-10-14 21:58:57,486 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 310
[2019-10-14 21:58:57,487 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:58:57,487 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-14 21:58:57,692 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:58:57,692 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:58:57,692 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:58:57,692 INFO  L82        PathProgramCache]: Analyzing trace with hash -725104376, now seen corresponding path program 1 times
[2019-10-14 21:58:57,693 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:58:57,695 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536352669]
[2019-10-14 21:58:57,695 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:57,696 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:58:57,696 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:58:57,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:57,829 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:57,868 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:57,939 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:58:58,048 INFO  L134       CoverageAnalysis]: Checked inductivity of 177 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked.
[2019-10-14 21:58:58,049 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536352669]
[2019-10-14 21:58:58,049 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:58:58,049 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-14 21:58:58,049 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695444226]
[2019-10-14 21:58:58,050 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 6 states
[2019-10-14 21:58:58,050 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:58:58,050 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2019-10-14 21:58:58,053 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-10-14 21:58:58,054 INFO  L87              Difference]: Start difference. First operand 3561 states and 4404 transitions. Second operand 6 states.
[2019-10-14 21:59:00,902 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:00,903 INFO  L93              Difference]: Finished difference Result 9057 states and 11383 transitions.
[2019-10-14 21:59:00,903 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:59:00,903 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 309
[2019-10-14 21:59:00,904 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:00,924 INFO  L225             Difference]: With dead ends: 9057
[2019-10-14 21:59:00,925 INFO  L226             Difference]: Without dead ends: 5690
[2019-10-14 21:59:00,933 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56
[2019-10-14 21:59:00,939 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5690 states.
[2019-10-14 21:59:01,041 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4522.
[2019-10-14 21:59:01,041 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4522 states.
[2019-10-14 21:59:01,049 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4522 states to 4522 states and 5511 transitions.
[2019-10-14 21:59:01,049 INFO  L78                 Accepts]: Start accepts. Automaton has 4522 states and 5511 transitions. Word has length 309
[2019-10-14 21:59:01,049 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:01,050 INFO  L462      AbstractCegarLoop]: Abstraction has 4522 states and 5511 transitions.
[2019-10-14 21:59:01,050 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2019-10-14 21:59:01,050 INFO  L276                IsEmpty]: Start isEmpty. Operand 4522 states and 5511 transitions.
[2019-10-14 21:59:01,060 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 345
[2019-10-14 21:59:01,060 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:01,060 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-14 21:59:01,060 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:01,061 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:01,061 INFO  L82        PathProgramCache]: Analyzing trace with hash 111570783, now seen corresponding path program 1 times
[2019-10-14 21:59:01,061 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:01,061 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360016560]
[2019-10-14 21:59:01,062 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:01,062 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:01,062 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:01,112 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:01,289 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:01,332 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:01,406 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:01,683 INFO  L134       CoverageAnalysis]: Checked inductivity of 195 backedges. 166 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-14 21:59:01,683 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360016560]
[2019-10-14 21:59:01,684 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944507906]
[2019-10-14 21:59:01,684 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 21:59:01,806 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:01,808 INFO  L256         TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 12 conjunts are in the unsatisfiable core
[2019-10-14 21:59:01,814 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:01,844 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:01,847 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:07,101 WARN  L191               SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 26 DAG size of output: 15
[2019-10-14 21:59:07,331 INFO  L134       CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:07,331 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:07,331 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16
[2019-10-14 21:59:07,332 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003798807]
[2019-10-14 21:59:07,333 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 16 states
[2019-10-14 21:59:07,333 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:07,333 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2019-10-14 21:59:07,333 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=193, Unknown=1, NotChecked=0, Total=240
[2019-10-14 21:59:07,334 INFO  L87              Difference]: Start difference. First operand 4522 states and 5511 transitions. Second operand 16 states.