/usr/bin/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/Problem10_label48.c


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This is Ultimate 0.1.24-fb55353
[2019-11-06 19:06:38,639 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2019-11-06 19:06:38,723 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
[2019-11-06 19:06:38,737 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-06 19:06:38,737 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-06 19:06:38,738 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-06 19:06:38,739 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-06 19:06:38,739 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-06 19:06:38,739 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-06 19:06:38,739 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-06 19:06:38,739 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-06 19:06:38,740 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-06 19:06:38,740 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-06 19:06:38,740 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-06 19:06:38,740 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-06 19:06:38,740 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-06 19:06:38,741 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-06 19:06:38,741 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-06 19:06:38,741 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-06 19:06:38,741 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-06 19:06:38,741 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-06 19:06:38,741 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-06 19:06:38,742 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-06 19:06:38,742 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-06 19:06:38,742 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-06 19:06:38,742 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-06 19:06:38,742 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-06 19:06:38,743 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-06 19:06:38,743 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-06 19:06:38,743 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-06 19:06:38,743 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-06 19:06:38,743 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-11-06 19:06:39,018 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-06 19:06:39,033 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-06 19:06:39,038 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-06 19:06:39,039 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-06 19:06:39,039 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-06 19:06:39,040 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label48.c
[2019-11-06 19:06:39,123 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a029e920e/434e000576634b9a960fa34c31e47579/FLAG18ccdab94
[2019-11-06 19:06:39,692 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-06 19:06:39,693 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label48.c
[2019-11-06 19:06:39,717 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a029e920e/434e000576634b9a960fa34c31e47579/FLAG18ccdab94
[2019-11-06 19:06:39,973 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a029e920e/434e000576634b9a960fa34c31e47579
[2019-11-06 19:06:39,983 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-06 19:06:39,985 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-06 19:06:39,986 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-06 19:06:39,986 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-06 19:06:39,989 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-06 19:06:39,991 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:06:39" (1/1) ...
[2019-11-06 19:06:39,994 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da2c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:39, skipping insertion in model container
[2019-11-06 19:06:39,994 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:06:39" (1/1) ...
[2019-11-06 19:06:40,001 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-06 19:06:40,062 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-06 19:06:40,540 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 19:06:40,549 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-06 19:06:40,739 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-06 19:06:40,757 INFO  L192         MainTranslator]: Completed translation
[2019-11-06 19:06:40,758 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40 WrapperNode
[2019-11-06 19:06:40,758 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-06 19:06:40,759 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-06 19:06:40,759 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-06 19:06:40,759 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-06 19:06:40,772 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40" (1/1) ...
[2019-11-06 19:06:40,772 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40" (1/1) ...
[2019-11-06 19:06:40,789 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40" (1/1) ...
[2019-11-06 19:06:40,790 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40" (1/1) ...
[2019-11-06 19:06:40,827 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40" (1/1) ...
[2019-11-06 19:06:40,843 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40" (1/1) ...
[2019-11-06 19:06:40,849 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40" (1/1) ...
[2019-11-06 19:06:40,859 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-06 19:06:40,859 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-06 19:06:40,859 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-06 19:06:40,860 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-06 19:06:40,861 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40" (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
[2019-11-06 19:06:40,938 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-06 19:06:40,938 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-06 19:06:40,939 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-11-06 19:06:40,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-06 19:06:40,940 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-11-06 19:06:40,941 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-06 19:06:40,941 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-06 19:06:40,942 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-11-06 19:06:40,942 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-06 19:06:40,943 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-06 19:06:40,943 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-06 19:06:42,247 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-06 19:06:42,248 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-11-06 19:06:42,249 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:06:42 BoogieIcfgContainer
[2019-11-06 19:06:42,249 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-06 19:06:42,250 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-06 19:06:42,250 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-06 19:06:42,253 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-06 19:06:42,254 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:06:39" (1/3) ...
[2019-11-06 19:06:42,255 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18580daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:06:42, skipping insertion in model container
[2019-11-06 19:06:42,255 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:06:40" (2/3) ...
[2019-11-06 19:06:42,256 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18580daf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:06:42, skipping insertion in model container
[2019-11-06 19:06:42,256 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:06:42" (3/3) ...
[2019-11-06 19:06:42,266 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem10_label48.c
[2019-11-06 19:06:42,276 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-06 19:06:42,283 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-06 19:06:42,293 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-06 19:06:42,320 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-06 19:06:42,320 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-06 19:06:42,320 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-06 19:06:42,320 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-06 19:06:42,322 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-06 19:06:42,322 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-06 19:06:42,322 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-06 19:06:42,322 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-06 19:06:42,354 INFO  L276                IsEmpty]: Start isEmpty. Operand 215 states.
[2019-11-06 19:06:42,361 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2019-11-06 19:06:42,362 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:06:42,363 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:06:42,365 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:06:42,369 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:06:42,370 INFO  L82        PathProgramCache]: Analyzing trace with hash 54045006, now seen corresponding path program 1 times
[2019-11-06 19:06:42,378 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:06:42,378 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945270606]
[2019-11-06 19:06:42,379 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:06:42,492 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:42,619 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:42,664 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:06:42,665 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945270606]
[2019-11-06 19:06:42,666 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 19:06:42,666 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-06 19:06:42,668 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672317174]
[2019-11-06 19:06:42,673 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-11-06 19:06:42,674 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:06:42,687 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-11-06 19:06:42,688 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-11-06 19:06:42,690 INFO  L87              Difference]: Start difference. First operand 215 states. Second operand 5 states.
[2019-11-06 19:06:44,586 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:06:44,587 INFO  L93              Difference]: Finished difference Result 730 states and 1301 transitions.
[2019-11-06 19:06:44,588 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-06 19:06:44,589 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2019-11-06 19:06:44,590 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:06:44,623 INFO  L225             Difference]: With dead ends: 730
[2019-11-06 19:06:44,623 INFO  L226             Difference]: Without dead ends: 447
[2019-11-06 19:06:44,636 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-11-06 19:06:44,656 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 447 states.
[2019-11-06 19:06:44,722 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441.
[2019-11-06 19:06:44,723 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 441 states.
[2019-11-06 19:06:44,726 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions.
[2019-11-06 19:06:44,728 INFO  L78                 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 13
[2019-11-06 19:06:44,728 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:06:44,729 INFO  L462      AbstractCegarLoop]: Abstraction has 441 states and 672 transitions.
[2019-11-06 19:06:44,729 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-11-06 19:06:44,729 INFO  L276                IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions.
[2019-11-06 19:06:44,733 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 87
[2019-11-06 19:06:44,733 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:06:44,733 INFO  L410         BasicCegarLoop]: trace histogram [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]
[2019-11-06 19:06:44,734 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:06:44,734 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:06:44,734 INFO  L82        PathProgramCache]: Analyzing trace with hash 58156773, now seen corresponding path program 1 times
[2019-11-06 19:06:44,735 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:06:44,735 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587129045]
[2019-11-06 19:06:44,735 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:06:44,802 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:44,921 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:44,983 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:45,069 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:06:45,070 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587129045]
[2019-11-06 19:06:45,070 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 19:06:45,070 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2019-11-06 19:06:45,091 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754093483]
[2019-11-06 19:06:45,095 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-11-06 19:06:45,095 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:06:45,095 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-11-06 19:06:45,096 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-11-06 19:06:45,096 INFO  L87              Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 9 states.
[2019-11-06 19:06:46,543 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:06:46,544 INFO  L93              Difference]: Finished difference Result 1041 states and 1612 transitions.
[2019-11-06 19:06:46,544 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-11-06 19:06:46,544 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 86
[2019-11-06 19:06:46,545 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:06:46,549 INFO  L225             Difference]: With dead ends: 1041
[2019-11-06 19:06:46,549 INFO  L226             Difference]: Without dead ends: 606
[2019-11-06 19:06:46,551 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182
[2019-11-06 19:06:46,552 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 606 states.
[2019-11-06 19:06:46,585 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 592.
[2019-11-06 19:06:46,586 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 592 states.
[2019-11-06 19:06:46,589 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 829 transitions.
[2019-11-06 19:06:46,589 INFO  L78                 Accepts]: Start accepts. Automaton has 592 states and 829 transitions. Word has length 86
[2019-11-06 19:06:46,589 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:06:46,590 INFO  L462      AbstractCegarLoop]: Abstraction has 592 states and 829 transitions.
[2019-11-06 19:06:46,590 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-11-06 19:06:46,590 INFO  L276                IsEmpty]: Start isEmpty. Operand 592 states and 829 transitions.
[2019-11-06 19:06:46,593 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 93
[2019-11-06 19:06:46,593 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:06:46,594 INFO  L410         BasicCegarLoop]: trace histogram [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]
[2019-11-06 19:06:46,594 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:06:46,594 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:06:46,594 INFO  L82        PathProgramCache]: Analyzing trace with hash -1907689263, now seen corresponding path program 1 times
[2019-11-06 19:06:46,595 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:06:46,595 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001098661]
[2019-11-06 19:06:46,595 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:06:46,618 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:46,662 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:46,687 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:46,726 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:06:46,726 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001098661]
[2019-11-06 19:06:46,726 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577023973]
[2019-11-06 19:06:46,727 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
[2019-11-06 19:06:46,814 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:46,817 INFO  L256         TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:06:46,830 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:06:46,885 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:06:46,886 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-06 19:06:46,886 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6
[2019-11-06 19:06:46,887 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256563315]
[2019-11-06 19:06:46,887 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 19:06:46,887 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:06:46,888 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 19:06:46,888 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-11-06 19:06:46,888 INFO  L87              Difference]: Start difference. First operand 592 states and 829 transitions. Second operand 3 states.
[2019-11-06 19:06:47,497 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:06:47,498 INFO  L93              Difference]: Finished difference Result 1615 states and 2274 transitions.
[2019-11-06 19:06:47,498 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-06 19:06:47,499 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 92
[2019-11-06 19:06:47,507 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:06:47,515 INFO  L225             Difference]: With dead ends: 1615
[2019-11-06 19:06:47,515 INFO  L226             Difference]: Without dead ends: 1029
[2019-11-06 19:06:47,520 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-11-06 19:06:47,525 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1029 states.
[2019-11-06 19:06:47,570 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 886.
[2019-11-06 19:06:47,570 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 886 states.
[2019-11-06 19:06:47,578 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1150 transitions.
[2019-11-06 19:06:47,578 INFO  L78                 Accepts]: Start accepts. Automaton has 886 states and 1150 transitions. Word has length 92
[2019-11-06 19:06:47,579 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:06:47,579 INFO  L462      AbstractCegarLoop]: Abstraction has 886 states and 1150 transitions.
[2019-11-06 19:06:47,579 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-06 19:06:47,579 INFO  L276                IsEmpty]: Start isEmpty. Operand 886 states and 1150 transitions.
[2019-11-06 19:06:47,586 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 150
[2019-11-06 19:06:47,586 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:06:47,586 INFO  L410         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:06:47,792 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:06:47,793 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:06:47,793 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:06:47,793 INFO  L82        PathProgramCache]: Analyzing trace with hash -1911741586, now seen corresponding path program 1 times
[2019-11-06 19:06:47,793 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:06:47,794 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198621451]
[2019-11-06 19:06:47,794 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:06:47,835 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:47,908 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:47,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:48,175 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:06:48,176 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198621451]
[2019-11-06 19:06:48,176 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-06 19:06:48,176 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2019-11-06 19:06:48,176 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404451927]
[2019-11-06 19:06:48,177 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 9 states
[2019-11-06 19:06:48,177 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:06:48,178 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2019-11-06 19:06:48,178 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-11-06 19:06:48,178 INFO  L87              Difference]: Start difference. First operand 886 states and 1150 transitions. Second operand 9 states.
[2019-11-06 19:06:49,989 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:06:49,989 INFO  L93              Difference]: Finished difference Result 2245 states and 2959 transitions.
[2019-11-06 19:06:49,994 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-11-06 19:06:49,994 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 149
[2019-11-06 19:06:49,995 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:06:50,002 INFO  L225             Difference]: With dead ends: 2245
[2019-11-06 19:06:50,002 INFO  L226             Difference]: Without dead ends: 1365
[2019-11-06 19:06:50,004 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272
[2019-11-06 19:06:50,006 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1365 states.
[2019-11-06 19:06:50,038 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1057.
[2019-11-06 19:06:50,038 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1057 states.
[2019-11-06 19:06:50,042 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1317 transitions.
[2019-11-06 19:06:50,043 INFO  L78                 Accepts]: Start accepts. Automaton has 1057 states and 1317 transitions. Word has length 149
[2019-11-06 19:06:50,043 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:06:50,043 INFO  L462      AbstractCegarLoop]: Abstraction has 1057 states and 1317 transitions.
[2019-11-06 19:06:50,044 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2019-11-06 19:06:50,044 INFO  L276                IsEmpty]: Start isEmpty. Operand 1057 states and 1317 transitions.
[2019-11-06 19:06:50,046 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 174
[2019-11-06 19:06:50,047 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:06:50,047 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:06:50,047 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:06:50,047 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:06:50,048 INFO  L82        PathProgramCache]: Analyzing trace with hash -1989322578, now seen corresponding path program 1 times
[2019-11-06 19:06:50,048 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:06:50,048 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620322563]
[2019-11-06 19:06:50,048 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:06:50,073 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:50,116 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:50,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:50,170 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:50,284 INFO  L134       CoverageAnalysis]: Checked inductivity of 82 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-06 19:06:50,285 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620322563]
[2019-11-06 19:06:50,285 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433714370]
[2019-11-06 19:06:50,285 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
[2019-11-06 19:06:50,368 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:50,369 INFO  L256         TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:06:50,375 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:06:50,480 INFO  L134       CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:06:50,480 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:06:50,480 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11
[2019-11-06 19:06:50,481 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595369982]
[2019-11-06 19:06:50,482 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 11 states
[2019-11-06 19:06:50,482 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:06:50,482 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2019-11-06 19:06:50,482 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-11-06 19:06:50,483 INFO  L87              Difference]: Start difference. First operand 1057 states and 1317 transitions. Second operand 11 states.
[2019-11-06 19:06:53,908 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:06:53,908 INFO  L93              Difference]: Finished difference Result 2933 states and 4043 transitions.
[2019-11-06 19:06:53,909 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. 
[2019-11-06 19:06:53,909 INFO  L78                 Accepts]: Start accepts. Automaton has 11 states. Word has length 173
[2019-11-06 19:06:53,910 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:06:53,925 INFO  L225             Difference]: With dead ends: 2933
[2019-11-06 19:06:53,925 INFO  L226             Difference]: Without dead ends: 1882
[2019-11-06 19:06:53,929 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506
[2019-11-06 19:06:53,931 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1882 states.
[2019-11-06 19:06:53,999 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1548.
[2019-11-06 19:06:53,999 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1548 states.
[2019-11-06 19:06:54,007 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 1966 transitions.
[2019-11-06 19:06:54,008 INFO  L78                 Accepts]: Start accepts. Automaton has 1548 states and 1966 transitions. Word has length 173
[2019-11-06 19:06:54,008 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:06:54,009 INFO  L462      AbstractCegarLoop]: Abstraction has 1548 states and 1966 transitions.
[2019-11-06 19:06:54,009 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 11 states.
[2019-11-06 19:06:54,009 INFO  L276                IsEmpty]: Start isEmpty. Operand 1548 states and 1966 transitions.
[2019-11-06 19:06:54,037 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 191
[2019-11-06 19:06:54,037 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:06:54,038 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:06:54,242 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:06:54,242 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:06:54,243 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:06:54,243 INFO  L82        PathProgramCache]: Analyzing trace with hash -885143483, now seen corresponding path program 1 times
[2019-11-06 19:06:54,244 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:06:54,244 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904123437]
[2019-11-06 19:06:54,245 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:06:54,270 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:54,316 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:54,341 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:54,392 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:54,438 INFO  L134       CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked.
[2019-11-06 19:06:54,438 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904123437]
[2019-11-06 19:06:54,438 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640148478]
[2019-11-06 19:06:54,438 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
[2019-11-06 19:06:54,535 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:54,537 INFO  L256         TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:06:54,542 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:06:54,584 INFO  L134       CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked.
[2019-11-06 19:06:54,584 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-06 19:06:54,585 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6
[2019-11-06 19:06:54,585 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269548723]
[2019-11-06 19:06:54,585 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 19:06:54,586 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:06:54,586 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 19:06:54,589 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-11-06 19:06:54,589 INFO  L87              Difference]: Start difference. First operand 1548 states and 1966 transitions. Second operand 3 states.
[2019-11-06 19:06:55,225 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:06:55,225 INFO  L93              Difference]: Finished difference Result 4274 states and 5547 transitions.
[2019-11-06 19:06:55,226 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-06 19:06:55,227 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 190
[2019-11-06 19:06:55,227 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:06:55,242 INFO  L225             Difference]: With dead ends: 4274
[2019-11-06 19:06:55,242 INFO  L226             Difference]: Without dead ends: 2732
[2019-11-06 19:06:55,249 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2019-11-06 19:06:55,252 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2732 states.
[2019-11-06 19:06:55,319 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2585.
[2019-11-06 19:06:55,320 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2585 states.
[2019-11-06 19:06:55,332 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3228 transitions.
[2019-11-06 19:06:55,332 INFO  L78                 Accepts]: Start accepts. Automaton has 2585 states and 3228 transitions. Word has length 190
[2019-11-06 19:06:55,332 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:06:55,333 INFO  L462      AbstractCegarLoop]: Abstraction has 2585 states and 3228 transitions.
[2019-11-06 19:06:55,333 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-06 19:06:55,333 INFO  L276                IsEmpty]: Start isEmpty. Operand 2585 states and 3228 transitions.
[2019-11-06 19:06:55,339 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 234
[2019-11-06 19:06:55,339 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:06:55,339 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:06:55,549 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:06:55,550 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:06:55,550 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:06:55,550 INFO  L82        PathProgramCache]: Analyzing trace with hash 1354539530, now seen corresponding path program 1 times
[2019-11-06 19:06:55,551 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:06:55,551 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884899354]
[2019-11-06 19:06:55,551 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:06:55,584 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:55,653 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:55,681 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:55,722 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:55,876 INFO  L134       CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-11-06 19:06:55,877 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884899354]
[2019-11-06 19:06:55,877 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444152868]
[2019-11-06 19:06:55,877 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
[2019-11-06 19:06:55,970 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:06:55,972 INFO  L256         TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:06:55,977 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:06:56,112 INFO  L134       CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-06 19:06:56,113 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:06:56,113 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13
[2019-11-06 19:06:56,114 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905044627]
[2019-11-06 19:06:56,117 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 13 states
[2019-11-06 19:06:56,117 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:06:56,117 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2019-11-06 19:06:56,118 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156
[2019-11-06 19:06:56,118 INFO  L87              Difference]: Start difference. First operand 2585 states and 3228 transitions. Second operand 13 states.
[2019-11-06 19:06:59,714 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:06:59,714 INFO  L93              Difference]: Finished difference Result 7087 states and 8798 transitions.
[2019-11-06 19:06:59,714 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. 
[2019-11-06 19:06:59,715 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states. Word has length 233
[2019-11-06 19:06:59,715 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:06:59,728 INFO  L225             Difference]: With dead ends: 7087
[2019-11-06 19:06:59,728 INFO  L226             Difference]: Without dead ends: 2867
[2019-11-06 19:06:59,742 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702
[2019-11-06 19:06:59,745 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2867 states.
[2019-11-06 19:06:59,802 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2275.
[2019-11-06 19:06:59,803 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2275 states.
[2019-11-06 19:06:59,808 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 2611 transitions.
[2019-11-06 19:06:59,809 INFO  L78                 Accepts]: Start accepts. Automaton has 2275 states and 2611 transitions. Word has length 233
[2019-11-06 19:06:59,809 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:06:59,809 INFO  L462      AbstractCegarLoop]: Abstraction has 2275 states and 2611 transitions.
[2019-11-06 19:06:59,809 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 13 states.
[2019-11-06 19:06:59,810 INFO  L276                IsEmpty]: Start isEmpty. Operand 2275 states and 2611 transitions.
[2019-11-06 19:06:59,817 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 270
[2019-11-06 19:06:59,817 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:06:59,817 INFO  L410         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-06 19:07:00,024 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:07:00,024 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:07:00,024 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:07:00,025 INFO  L82        PathProgramCache]: Analyzing trace with hash 997665666, now seen corresponding path program 1 times
[2019-11-06 19:07:00,025 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:07:00,025 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732012357]
[2019-11-06 19:07:00,025 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:07:00,076 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:00,132 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:00,146 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:00,198 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:00,364 INFO  L134       CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2019-11-06 19:07:00,365 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732012357]
[2019-11-06 19:07:00,365 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465564635]
[2019-11-06 19:07:00,365 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
[2019-11-06 19:07:00,511 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:00,513 INFO  L256         TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-11-06 19:07:00,520 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:07:00,607 INFO  L134       CoverageAnalysis]: Checked inductivity of 127 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked.
[2019-11-06 19:07:00,608 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-11-06 19:07:00,610 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6
[2019-11-06 19:07:00,611 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174262219]
[2019-11-06 19:07:00,611 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-11-06 19:07:00,612 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:07:00,612 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-11-06 19:07:00,613 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-11-06 19:07:00,613 INFO  L87              Difference]: Start difference. First operand 2275 states and 2611 transitions. Second operand 3 states.
[2019-11-06 19:07:01,153 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:07:01,153 INFO  L93              Difference]: Finished difference Result 4838 states and 5609 transitions.
[2019-11-06 19:07:01,154 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-11-06 19:07:01,154 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 269
[2019-11-06 19:07:01,155 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:07:01,166 INFO  L225             Difference]: With dead ends: 4838
[2019-11-06 19:07:01,167 INFO  L226             Difference]: Without dead ends: 2565
[2019-11-06 19:07:01,175 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2019-11-06 19:07:01,178 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2565 states.
[2019-11-06 19:07:01,270 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2565.
[2019-11-06 19:07:01,271 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2565 states.
[2019-11-06 19:07:01,278 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 2941 transitions.
[2019-11-06 19:07:01,278 INFO  L78                 Accepts]: Start accepts. Automaton has 2565 states and 2941 transitions. Word has length 269
[2019-11-06 19:07:01,279 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:07:01,279 INFO  L462      AbstractCegarLoop]: Abstraction has 2565 states and 2941 transitions.
[2019-11-06 19:07:01,279 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-11-06 19:07:01,279 INFO  L276                IsEmpty]: Start isEmpty. Operand 2565 states and 2941 transitions.
[2019-11-06 19:07:01,287 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 274
[2019-11-06 19:07:01,288 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:07:01,288 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2019-11-06 19:07:01,499 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:07:01,500 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:07:01,500 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:07:01,500 INFO  L82        PathProgramCache]: Analyzing trace with hash -126778982, now seen corresponding path program 1 times
[2019-11-06 19:07:01,500 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:07:01,500 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812341882]
[2019-11-06 19:07:01,501 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:07:01,540 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:01,638 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:01,674 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:01,747 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:01,812 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:02,199 INFO  L134       CoverageAnalysis]: Checked inductivity of 235 backedges. 87 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2019-11-06 19:07:02,200 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812341882]
[2019-11-06 19:07:02,200 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243511777]
[2019-11-06 19:07:02,200 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:07:02,307 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:02,309 INFO  L256         TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-11-06 19:07:02,314 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:07:02,379 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-11-06 19:07:02,559 INFO  L134       CoverageAnalysis]: Checked inductivity of 235 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked.
[2019-11-06 19:07:02,560 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:07:02,560 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 17
[2019-11-06 19:07:02,560 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996982745]
[2019-11-06 19:07:02,561 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 17 states
[2019-11-06 19:07:02,561 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:07:02,562 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2019-11-06 19:07:02,562 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272
[2019-11-06 19:07:02,562 INFO  L87              Difference]: Start difference. First operand 2565 states and 2941 transitions. Second operand 17 states.
[2019-11-06 19:07:09,709 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-06 19:07:09,709 INFO  L93              Difference]: Finished difference Result 6285 states and 7591 transitions.
[2019-11-06 19:07:09,711 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. 
[2019-11-06 19:07:09,711 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states. Word has length 273
[2019-11-06 19:07:09,712 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-06 19:07:09,729 INFO  L225             Difference]: With dead ends: 6285
[2019-11-06 19:07:09,729 INFO  L226             Difference]: Without dead ends: 3869
[2019-11-06 19:07:09,738 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550
[2019-11-06 19:07:09,742 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3869 states.
[2019-11-06 19:07:09,853 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3869 to 3755.
[2019-11-06 19:07:09,853 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3755 states.
[2019-11-06 19:07:09,862 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 4309 transitions.
[2019-11-06 19:07:09,863 INFO  L78                 Accepts]: Start accepts. Automaton has 3755 states and 4309 transitions. Word has length 273
[2019-11-06 19:07:09,863 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-06 19:07:09,863 INFO  L462      AbstractCegarLoop]: Abstraction has 3755 states and 4309 transitions.
[2019-11-06 19:07:09,864 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 17 states.
[2019-11-06 19:07:09,864 INFO  L276                IsEmpty]: Start isEmpty. Operand 3755 states and 4309 transitions.
[2019-11-06 19:07:09,874 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 287
[2019-11-06 19:07:09,875 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-06 19:07:09,875 INFO  L410         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2019-11-06 19:07:10,079 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:07:10,080 INFO  L410      AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-06 19:07:10,080 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-06 19:07:10,081 INFO  L82        PathProgramCache]: Analyzing trace with hash 1681862689, now seen corresponding path program 1 times
[2019-11-06 19:07:10,082 INFO  L161   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2019-11-06 19:07:10,082 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458890196]
[2019-11-06 19:07:10,082 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-06 19:07:10,145 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:10,247 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:10,284 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:10,328 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:10,408 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:10,755 INFO  L134       CoverageAnalysis]: Checked inductivity of 249 backedges. 234 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2019-11-06 19:07:10,756 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458890196]
[2019-11-06 19:07:10,756 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899358815]
[2019-11-06 19:07:10,756 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-11-06 19:07:10,860 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-06 19:07:10,861 INFO  L256         TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core
[2019-11-06 19:07:10,866 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-11-06 19:07:10,872 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:07:10,873 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:07:10,874 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:07:10,876 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:07:10,876 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:07:10,877 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:07:10,879 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:07:10,880 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-11-06 19:07:11,072 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-11-06 19:07:11,195 INFO  L134       CoverageAnalysis]: Checked inductivity of 249 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked.
[2019-11-06 19:07:11,195 INFO  L218   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-11-06 19:07:11,196 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19
[2019-11-06 19:07:11,196 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8441914]
[2019-11-06 19:07:11,197 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 19 states
[2019-11-06 19:07:11,197 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-11-06 19:07:11,197 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants.
[2019-11-06 19:07:11,198 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342
[2019-11-06 19:07:11,198 INFO  L87              Difference]: Start difference. First operand 3755 states and 4309 transitions. Second operand 19 states.