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/Problem12_label36.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 22:00:33,470 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-10-14 22:00:33,566 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-14 22:00:33,589 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 22:00:33,589 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 22:00:33,592 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 22:00:33,592 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 22:00:33,592 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 22:00:33,593 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 22:00:33,593 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 22:00:33,593 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 22:00:33,593 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 22:00:33,593 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 22:00:33,595 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 22:00:33,595 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 22:00:33,595 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 22:00:33,596 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 22:00:33,596 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 22:00:33,596 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 22:00:33,596 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 22:00:33,597 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 22:00:33,597 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 22:00:33,597 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 22:00:33,597 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 22:00:33,598 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 22:00:33,598 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 22:00:33,598 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 22:00:33,598 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 22:00:33,598 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 22:00:33,599 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 22:00:33,599 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 22:00:33,599 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 22:00:33,909 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 22:00:33,926 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 22:00:33,929 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 22:00:33,931 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 22:00:33,931 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 22:00:33,932 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label36.c
[2019-10-14 22:00:34,006 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/587de31df/3ca84f5a126140d59fd226016cb5b584/FLAGabe2733b5
[2019-10-14 22:00:34,777 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 22:00:34,778 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label36.c
[2019-10-14 22:00:34,821 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/587de31df/3ca84f5a126140d59fd226016cb5b584/FLAGabe2733b5
[2019-10-14 22:00:34,863 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/587de31df/3ca84f5a126140d59fd226016cb5b584
[2019-10-14 22:00:34,876 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 22:00:34,879 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 22:00:34,881 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 22:00:34,881 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 22:00:34,885 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 22:00:34,886 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:00:34" (1/1) ...
[2019-10-14 22:00:34,889 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5782f2d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34, skipping insertion in model container
[2019-10-14 22:00:34,890 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:00:34" (1/1) ...
[2019-10-14 22:00:34,898 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 22:00:35,044 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 22:00:36,398 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:00:36,409 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 22:00:37,175 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 22:00:37,204 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 22:00:37,205 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37 WrapperNode
[2019-10-14 22:00:37,206 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 22:00:37,207 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 22:00:37,207 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 22:00:37,207 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 22:00:37,221 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37" (1/1) ...
[2019-10-14 22:00:37,221 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37" (1/1) ...
[2019-10-14 22:00:37,276 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37" (1/1) ...
[2019-10-14 22:00:37,277 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37" (1/1) ...
[2019-10-14 22:00:37,385 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37" (1/1) ...
[2019-10-14 22:00:37,421 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37" (1/1) ...
[2019-10-14 22:00:37,446 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37" (1/1) ...
[2019-10-14 22:00:37,486 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 22:00:37,486 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 22:00:37,487 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 22:00:37,487 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 22:00:37,488 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 22:00:37,567 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 22:00:37,567 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 22:00:37,568 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 22:00:37,568 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2019-10-14 22:00:37,568 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2019-10-14 22:00:37,569 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2019-10-14 22:00:37,569 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 22:00:37,570 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 22:00:37,570 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2019-10-14 22:00:37,571 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2019-10-14 22:00:37,571 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2019-10-14 22:00:37,571 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 22:00:37,572 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 22:00:37,572 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 22:00:37,573 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 22:00:37,573 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 22:00:37,575 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 22:00:42,513 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 22:00:42,513 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 22:00:42,519 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:42 BoogieIcfgContainer
[2019-10-14 22:00:42,519 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 22:00:42,520 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 22:00:42,521 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 22:00:42,524 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 22:00:42,525 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:00:34" (1/3) ...
[2019-10-14 22:00:42,527 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d145ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:42, skipping insertion in model container
[2019-10-14 22:00:42,527 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:37" (2/3) ...
[2019-10-14 22:00:42,528 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d145ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:42, skipping insertion in model container
[2019-10-14 22:00:42,528 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:42" (3/3) ...
[2019-10-14 22:00:42,538 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem12_label36.c
[2019-10-14 22:00:42,549 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 22:00:42,562 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 22:00:42,575 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 22:00:42,621 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 22:00:42,621 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 22:00:42,621 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 22:00:42,621 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 22:00:42,622 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 22:00:42,622 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 22:00:42,622 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 22:00:42,622 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 22:00:42,669 INFO  L276                IsEmpty]: Start isEmpty. Operand 839 states.
[2019-10-14 22:00:42,681 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 64
[2019-10-14 22:00:42,681 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:00:42,683 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:00:42,685 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:00:42,692 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:00:42,692 INFO  L82        PathProgramCache]: Analyzing trace with hash -1144100014, now seen corresponding path program 1 times
[2019-10-14 22:00:42,702 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:00:42,703 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788757973]
[2019-10-14 22:00:42,704 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:00:42,704 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:00:42,704 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:00:42,936 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:00:43,212 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:00:43,264 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:00:43,265 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788757973]
[2019-10-14 22:00:43,266 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 22:00:43,266 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 22:00:43,267 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062571953]
[2019-10-14 22:00:43,272 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 22:00:43,272 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:00:43,287 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 22:00:43,287 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 22:00:43,290 INFO  L87              Difference]: Start difference. First operand 839 states. Second operand 5 states.
[2019-10-14 22:00:54,914 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:00:54,915 INFO  L93              Difference]: Finished difference Result 3253 states and 6294 transitions.
[2019-10-14 22:00:54,916 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 22:00:54,917 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 63
[2019-10-14 22:00:54,918 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:00:54,963 INFO  L225             Difference]: With dead ends: 3253
[2019-10-14 22:00:54,963 INFO  L226             Difference]: Without dead ends: 2346
[2019-10-14 22:00:54,974 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-14 22:00:54,996 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2346 states.
[2019-10-14 22:00:55,156 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2331.
[2019-10-14 22:00:55,157 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2331 states.
[2019-10-14 22:00:55,169 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 3787 transitions.
[2019-10-14 22:00:55,171 INFO  L78                 Accepts]: Start accepts. Automaton has 2331 states and 3787 transitions. Word has length 63
[2019-10-14 22:00:55,172 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:00:55,172 INFO  L462      AbstractCegarLoop]: Abstraction has 2331 states and 3787 transitions.
[2019-10-14 22:00:55,172 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 22:00:55,172 INFO  L276                IsEmpty]: Start isEmpty. Operand 2331 states and 3787 transitions.
[2019-10-14 22:00:55,179 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 139
[2019-10-14 22:00:55,179 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:00:55,180 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:00:55,180 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:00:55,180 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:00:55,181 INFO  L82        PathProgramCache]: Analyzing trace with hash -1744493685, now seen corresponding path program 1 times
[2019-10-14 22:00:55,181 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:00:55,181 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364585458]
[2019-10-14 22:00:55,181 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:00:55,182 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:00:55,182 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:00:55,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:00:55,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:00:55,432 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:00:55,499 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 52 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:00:55,500 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364585458]
[2019-10-14 22:00:55,500 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111531938]
[2019-10-14 22:00:55,500 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:00:55,596 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:00:55,599 INFO  L256         TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 22:00:55,615 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 22:00:55,699 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:00:55,699 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 22:00:55,700 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9
[2019-10-14 22:00:55,700 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957026711]
[2019-10-14 22:00:55,704 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 22:00:55,704 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:00:55,704 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 22:00:55,705 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2019-10-14 22:00:55,705 INFO  L87              Difference]: Start difference. First operand 2331 states and 3787 transitions. Second operand 3 states.
[2019-10-14 22:01:00,580 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 22:01:00,580 INFO  L93              Difference]: Finished difference Result 6979 states and 11460 transitions.
[2019-10-14 22:01:00,581 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 22:01:00,581 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 138
[2019-10-14 22:01:00,582 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 22:01:00,609 INFO  L225             Difference]: With dead ends: 6979
[2019-10-14 22:01:00,609 INFO  L226             Difference]: Without dead ends: 4654
[2019-10-14 22:01:00,616 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72
[2019-10-14 22:01:00,623 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4654 states.
[2019-10-14 22:01:00,725 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4654 to 4654.
[2019-10-14 22:01:00,726 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4654 states.
[2019-10-14 22:01:00,742 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 7184 transitions.
[2019-10-14 22:01:00,742 INFO  L78                 Accepts]: Start accepts. Automaton has 4654 states and 7184 transitions. Word has length 138
[2019-10-14 22:01:00,743 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 22:01:00,743 INFO  L462      AbstractCegarLoop]: Abstraction has 4654 states and 7184 transitions.
[2019-10-14 22:01:00,744 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 22:01:00,744 INFO  L276                IsEmpty]: Start isEmpty. Operand 4654 states and 7184 transitions.
[2019-10-14 22:01:00,747 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 143
[2019-10-14 22:01:00,748 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 22:01:00,748 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 22:01:00,954 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 22:01:00,955 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 22:01:00,955 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 22:01:00,956 INFO  L82        PathProgramCache]: Analyzing trace with hash 1318770259, now seen corresponding path program 1 times
[2019-10-14 22:01:00,956 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 22:01:00,957 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820174548]
[2019-10-14 22:01:00,957 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:01:00,957 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 22:01:00,957 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 22:01:01,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:01:01,095 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:01:01,140 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 22:01:01,230 INFO  L134       CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 22:01:01,231 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820174548]
[2019-10-14 22:01:01,231 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 22:01:01,231 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2019-10-14 22:01:01,231 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689038590]
[2019-10-14 22:01:01,233 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-10-14 22:01:01,234 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 22:01:01,234 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-10-14 22:01:01,235 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2019-10-14 22:01:01,235 INFO  L87              Difference]: Start difference. First operand 4654 states and 7184 transitions. Second operand 7 states.