java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label43.c


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This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 18:00:34,582 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 18:00:34,585 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-13 18:00:34,664 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
[2019-10-13 18:00:34,677 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 18:00:34,678 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 18:00:34,679 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 18:00:34,679 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 18:00:34,679 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 18:00:34,679 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 18:00:34,680 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 18:00:34,680 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 18:00:34,680 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 18:00:34,680 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 18:00:34,680 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 18:00:34,681 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 18:00:34,681 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 18:00:34,681 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 18:00:34,681 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 18:00:34,681 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 18:00:34,682 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 18:00:34,682 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 18:00:34,682 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 18:00:34,682 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 18:00:34,682 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 18:00:34,683 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 18:00:34,683 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 18:00:34,683 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 18:00:34,683 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 18:00:34,683 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 18:00:34,684 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 18:00:34,684 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 18:00:34,684 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 18:00:35,002 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 18:00:35,021 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 18:00:35,025 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 18:00:35,027 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 18:00:35,027 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 18:00:35,028 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label43.c
[2019-10-13 18:00:35,097 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d527b75db/efc3d4717ea1410baf87515ea4c0722b/FLAG0678803ad
[2019-10-13 18:00:35,728 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 18:00:35,732 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label43.c
[2019-10-13 18:00:35,747 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d527b75db/efc3d4717ea1410baf87515ea4c0722b/FLAG0678803ad
[2019-10-13 18:00:35,918 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d527b75db/efc3d4717ea1410baf87515ea4c0722b
[2019-10-13 18:00:35,927 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 18:00:35,928 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 18:00:35,930 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 18:00:35,930 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 18:00:35,933 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 18:00:35,934 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:35" (1/1) ...
[2019-10-13 18:00:35,936 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e9683c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:35, skipping insertion in model container
[2019-10-13 18:00:35,937 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:35" (1/1) ...
[2019-10-13 18:00:35,943 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 18:00:36,011 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 18:00:36,704 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:00:36,711 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 18:00:36,914 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 18:00:36,934 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 18:00:36,935 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36 WrapperNode
[2019-10-13 18:00:36,935 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 18:00:36,936 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 18:00:36,936 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 18:00:36,936 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 18:00:36,951 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36" (1/1) ...
[2019-10-13 18:00:36,951 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36" (1/1) ...
[2019-10-13 18:00:36,977 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36" (1/1) ...
[2019-10-13 18:00:36,977 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36" (1/1) ...
[2019-10-13 18:00:37,048 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36" (1/1) ...
[2019-10-13 18:00:37,078 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36" (1/1) ...
[2019-10-13 18:00:37,106 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36" (1/1) ...
[2019-10-13 18:00:37,125 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 18:00:37,125 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 18:00:37,125 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 18:00:37,126 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 18:00:37,127 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36" (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
[2019-10-13 18:00:37,202 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 18:00:37,202 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 18:00:37,202 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 18:00:37,203 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 18:00:37,203 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 18:00:37,204 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 18:00:37,204 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 18:00:37,204 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 18:00:37,205 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 18:00:37,205 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 18:00:37,205 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 18:00:39,102 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 18:00:39,103 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 18:00:39,104 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:39 BoogieIcfgContainer
[2019-10-13 18:00:39,104 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 18:00:39,106 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 18:00:39,106 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 18:00:39,110 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 18:00:39,110 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:35" (1/3) ...
[2019-10-13 18:00:39,111 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145599a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:39, skipping insertion in model container
[2019-10-13 18:00:39,112 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:36" (2/3) ...
[2019-10-13 18:00:39,112 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145599a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:39, skipping insertion in model container
[2019-10-13 18:00:39,118 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:39" (3/3) ...
[2019-10-13 18:00:39,134 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label43.c
[2019-10-13 18:00:39,151 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 18:00:39,161 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 18:00:39,176 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 18:00:39,231 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 18:00:39,232 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 18:00:39,232 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 18:00:39,232 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 18:00:39,233 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 18:00:39,233 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 18:00:39,233 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 18:00:39,234 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 18:00:39,281 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-10-13 18:00:39,289 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2019-10-13 18:00:39,290 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:39,291 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:39,295 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:39,301 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:39,302 INFO  L82        PathProgramCache]: Analyzing trace with hash -1328885261, now seen corresponding path program 1 times
[2019-10-13 18:00:39,314 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:39,314 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208034195]
[2019-10-13 18:00:39,315 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:39,315 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:39,315 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:39,521 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:39,745 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:39,769 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:39,770 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208034195]
[2019-10-13 18:00:39,771 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:00:39,771 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 18:00:39,771 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222706015]
[2019-10-13 18:00:39,776 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:00:39,776 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:39,791 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:00:39,792 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:00:39,794 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-10-13 18:00:43,108 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:43,109 INFO  L93              Difference]: Finished difference Result 998 states and 1793 transitions.
[2019-10-13 18:00:43,113 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:43,115 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 18
[2019-10-13 18:00:43,116 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:43,144 INFO  L225             Difference]: With dead ends: 998
[2019-10-13 18:00:43,145 INFO  L226             Difference]: Without dead ends: 638
[2019-10-13 18:00:43,156 INFO  L600         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
[2019-10-13 18:00:43,176 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 638 states.
[2019-10-13 18:00:43,253 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 621.
[2019-10-13 18:00:43,259 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 621 states.
[2019-10-13 18:00:43,265 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 621 states to 621 states and 950 transitions.
[2019-10-13 18:00:43,267 INFO  L78                 Accepts]: Start accepts. Automaton has 621 states and 950 transitions. Word has length 18
[2019-10-13 18:00:43,272 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:43,272 INFO  L462      AbstractCegarLoop]: Abstraction has 621 states and 950 transitions.
[2019-10-13 18:00:43,272 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:43,272 INFO  L276                IsEmpty]: Start isEmpty. Operand 621 states and 950 transitions.
[2019-10-13 18:00:43,278 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 89
[2019-10-13 18:00:43,278 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:43,279 INFO  L380         BasicCegarLoop]: trace histogram [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]
[2019-10-13 18:00:43,279 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:43,279 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:43,279 INFO  L82        PathProgramCache]: Analyzing trace with hash 1087943286, now seen corresponding path program 1 times
[2019-10-13 18:00:43,280 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:43,280 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322690300]
[2019-10-13 18:00:43,280 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:43,280 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:43,280 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:43,359 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:43,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:43,533 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:43,657 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:43,658 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322690300]
[2019-10-13 18:00:43,658 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:00:43,658 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-13 18:00:43,658 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082128947]
[2019-10-13 18:00:43,660 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 18:00:43,660 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:43,661 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 18:00:43,661 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-13 18:00:43,661 INFO  L87              Difference]: Start difference. First operand 621 states and 950 transitions. Second operand 8 states.
[2019-10-13 18:00:47,464 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:47,465 INFO  L93              Difference]: Finished difference Result 2487 states and 4246 transitions.
[2019-10-13 18:00:47,466 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2019-10-13 18:00:47,466 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 88
[2019-10-13 18:00:47,467 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:47,492 INFO  L225             Difference]: With dead ends: 2487
[2019-10-13 18:00:47,493 INFO  L226             Difference]: Without dead ends: 1872
[2019-10-13 18:00:47,498 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182
[2019-10-13 18:00:47,501 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1872 states.
[2019-10-13 18:00:47,617 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1872 to 1816.
[2019-10-13 18:00:47,617 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1816 states.
[2019-10-13 18:00:47,630 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2597 transitions.
[2019-10-13 18:00:47,630 INFO  L78                 Accepts]: Start accepts. Automaton has 1816 states and 2597 transitions. Word has length 88
[2019-10-13 18:00:47,631 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:47,631 INFO  L462      AbstractCegarLoop]: Abstraction has 1816 states and 2597 transitions.
[2019-10-13 18:00:47,632 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-13 18:00:47,632 INFO  L276                IsEmpty]: Start isEmpty. Operand 1816 states and 2597 transitions.
[2019-10-13 18:00:47,640 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 99
[2019-10-13 18:00:47,641 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:47,642 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:47,642 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:47,642 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:47,642 INFO  L82        PathProgramCache]: Analyzing trace with hash 492940226, now seen corresponding path program 1 times
[2019-10-13 18:00:47,643 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:47,643 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658664307]
[2019-10-13 18:00:47,643 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:47,643 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:47,643 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:47,668 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:47,736 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:47,767 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:47,912 INFO  L134       CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:47,912 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658664307]
[2019-10-13 18:00:47,913 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 18:00:47,913 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-13 18:00:47,913 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282344197]
[2019-10-13 18:00:47,914 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 18:00:47,914 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:47,914 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 18:00:47,915 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-13 18:00:47,915 INFO  L87              Difference]: Start difference. First operand 1816 states and 2597 transitions. Second operand 8 states.
[2019-10-13 18:00:50,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:50,948 INFO  L93              Difference]: Finished difference Result 5268 states and 7936 transitions.
[2019-10-13 18:00:50,949 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2019-10-13 18:00:50,957 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 98
[2019-10-13 18:00:50,957 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:50,981 INFO  L225             Difference]: With dead ends: 5268
[2019-10-13 18:00:50,981 INFO  L226             Difference]: Without dead ends: 3458
[2019-10-13 18:00:50,989 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-10-13 18:00:50,994 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3458 states.
[2019-10-13 18:00:51,098 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3458 to 3233.
[2019-10-13 18:00:51,098 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3233 states.
[2019-10-13 18:00:51,115 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4504 transitions.
[2019-10-13 18:00:51,115 INFO  L78                 Accepts]: Start accepts. Automaton has 3233 states and 4504 transitions. Word has length 98
[2019-10-13 18:00:51,117 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:51,118 INFO  L462      AbstractCegarLoop]: Abstraction has 3233 states and 4504 transitions.
[2019-10-13 18:00:51,118 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-13 18:00:51,118 INFO  L276                IsEmpty]: Start isEmpty. Operand 3233 states and 4504 transitions.
[2019-10-13 18:00:51,123 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 162
[2019-10-13 18:00:51,123 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:51,124 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:51,124 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:51,124 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:51,124 INFO  L82        PathProgramCache]: Analyzing trace with hash 610166376, now seen corresponding path program 1 times
[2019-10-13 18:00:51,125 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:51,125 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594358099]
[2019-10-13 18:00:51,125 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:51,126 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:51,126 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:51,196 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:51,294 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:51,323 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:51,388 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:51,524 INFO  L134       CoverageAnalysis]: Checked inductivity of 92 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-13 18:00:51,524 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594358099]
[2019-10-13 18:00:51,524 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417468952]
[2019-10-13 18:00:51,525 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
[2019-10-13 18:00:51,620 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:51,622 INFO  L256         TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-10-13 18:00:51,632 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:51,675 INFO  L134       CoverageAnalysis]: Checked inductivity of 92 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 18:00:51,675 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:51,675 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8
[2019-10-13 18:00:51,676 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988019287]
[2019-10-13 18:00:51,677 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 18:00:51,677 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:51,677 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 18:00:51,677 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-13 18:00:51,678 INFO  L87              Difference]: Start difference. First operand 3233 states and 4504 transitions. Second operand 8 states.
[2019-10-13 18:00:54,101 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:54,101 INFO  L93              Difference]: Finished difference Result 6540 states and 9942 transitions.
[2019-10-13 18:00:54,103 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2019-10-13 18:00:54,103 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 161
[2019-10-13 18:00:54,106 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:54,127 INFO  L225             Difference]: With dead ends: 6540
[2019-10-13 18:00:54,127 INFO  L226             Difference]: Without dead ends: 3313
[2019-10-13 18:00:54,140 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 167 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156
[2019-10-13 18:00:54,143 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3313 states.
[2019-10-13 18:00:54,232 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3313 to 2993.
[2019-10-13 18:00:54,232 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2993 states.
[2019-10-13 18:00:54,241 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2993 states to 2993 states and 3905 transitions.
[2019-10-13 18:00:54,241 INFO  L78                 Accepts]: Start accepts. Automaton has 2993 states and 3905 transitions. Word has length 161
[2019-10-13 18:00:54,242 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:54,242 INFO  L462      AbstractCegarLoop]: Abstraction has 2993 states and 3905 transitions.
[2019-10-13 18:00:54,242 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-13 18:00:54,242 INFO  L276                IsEmpty]: Start isEmpty. Operand 2993 states and 3905 transitions.
[2019-10-13 18:00:54,245 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 172
[2019-10-13 18:00:54,246 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:54,246 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:54,450 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:54,450 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:54,451 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:54,451 INFO  L82        PathProgramCache]: Analyzing trace with hash -942368460, now seen corresponding path program 1 times
[2019-10-13 18:00:54,451 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:54,451 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581844070]
[2019-10-13 18:00:54,452 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:54,452 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:54,455 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:54,502 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:54,582 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:54,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:54,636 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:54,691 INFO  L134       CoverageAnalysis]: Checked inductivity of 95 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-10-13 18:00:54,691 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581844070]
[2019-10-13 18:00:54,692 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418227110]
[2019-10-13 18:00:54,692 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:54,820 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:54,822 INFO  L256         TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 18:00:54,835 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:54,926 INFO  L134       CoverageAnalysis]: Checked inductivity of 95 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-10-13 18:00:54,927 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:54,927 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5
[2019-10-13 18:00:54,927 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408597371]
[2019-10-13 18:00:54,928 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 18:00:54,930 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:54,930 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 18:00:54,930 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:00:54,930 INFO  L87              Difference]: Start difference. First operand 2993 states and 3905 transitions. Second operand 3 states.
[2019-10-13 18:00:56,096 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:56,096 INFO  L93              Difference]: Finished difference Result 7518 states and 10149 transitions.
[2019-10-13 18:00:56,097 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 18:00:56,097 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 171
[2019-10-13 18:00:56,098 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:56,117 INFO  L225             Difference]: With dead ends: 7518
[2019-10-13 18:00:56,118 INFO  L226             Difference]: Without dead ends: 4531
[2019-10-13 18:00:56,126 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:00:56,131 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4531 states.
[2019-10-13 18:00:56,221 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 4139.
[2019-10-13 18:00:56,222 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4139 states.
[2019-10-13 18:00:56,231 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 5492 transitions.
[2019-10-13 18:00:56,231 INFO  L78                 Accepts]: Start accepts. Automaton has 4139 states and 5492 transitions. Word has length 171
[2019-10-13 18:00:56,232 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:56,232 INFO  L462      AbstractCegarLoop]: Abstraction has 4139 states and 5492 transitions.
[2019-10-13 18:00:56,232 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 18:00:56,232 INFO  L276                IsEmpty]: Start isEmpty. Operand 4139 states and 5492 transitions.
[2019-10-13 18:00:56,237 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 223
[2019-10-13 18:00:56,238 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:56,238 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:56,441 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:56,442 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:56,442 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:56,442 INFO  L82        PathProgramCache]: Analyzing trace with hash -832123765, now seen corresponding path program 1 times
[2019-10-13 18:00:56,443 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:56,443 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361695261]
[2019-10-13 18:00:56,443 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:56,443 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:56,444 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:56,506 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:56,605 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:56,631 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:56,695 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:57,059 INFO  L134       CoverageAnalysis]: Checked inductivity of 96 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-13 18:00:57,060 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361695261]
[2019-10-13 18:00:57,060 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361023458]
[2019-10-13 18:00:57,060 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:57,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:57,151 INFO  L256         TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-10-13 18:00:57,156 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:57,208 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-13 18:00:57,280 INFO  L134       CoverageAnalysis]: Checked inductivity of 96 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2019-10-13 18:00:57,280 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:57,281 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11
[2019-10-13 18:00:57,281 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706915699]
[2019-10-13 18:00:57,282 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 18:00:57,282 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:57,282 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 18:00:57,282 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2019-10-13 18:00:57,282 INFO  L87              Difference]: Start difference. First operand 4139 states and 5492 transitions. Second operand 5 states.
[2019-10-13 18:00:58,948 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:58,948 INFO  L93              Difference]: Finished difference Result 8337 states and 11181 transitions.
[2019-10-13 18:00:58,949 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:00:58,949 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 222
[2019-10-13 18:00:58,949 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:58,966 INFO  L225             Difference]: With dead ends: 8337
[2019-10-13 18:00:58,967 INFO  L226             Difference]: Without dead ends: 4204
[2019-10-13 18:00:58,976 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156
[2019-10-13 18:00:58,980 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4204 states.
[2019-10-13 18:00:59,067 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 4155.
[2019-10-13 18:00:59,068 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4155 states.
[2019-10-13 18:00:59,075 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5503 transitions.
[2019-10-13 18:00:59,076 INFO  L78                 Accepts]: Start accepts. Automaton has 4155 states and 5503 transitions. Word has length 222
[2019-10-13 18:00:59,076 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:59,076 INFO  L462      AbstractCegarLoop]: Abstraction has 4155 states and 5503 transitions.
[2019-10-13 18:00:59,076 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 18:00:59,076 INFO  L276                IsEmpty]: Start isEmpty. Operand 4155 states and 5503 transitions.
[2019-10-13 18:00:59,082 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 257
[2019-10-13 18:00:59,082 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:59,083 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:59,287 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:59,288 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:59,288 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:59,289 INFO  L82        PathProgramCache]: Analyzing trace with hash -951222920, now seen corresponding path program 1 times
[2019-10-13 18:00:59,289 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:59,289 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637050912]
[2019-10-13 18:00:59,289 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:59,290 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:59,290 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:59,339 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:59,478 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:59,530 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:59,583 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:59,650 INFO  L134       CoverageAnalysis]: Checked inductivity of 129 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-10-13 18:00:59,650 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637050912]
[2019-10-13 18:00:59,650 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043722448]
[2019-10-13 18:00:59,650 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:59,753 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:59,754 INFO  L256         TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-13 18:00:59,759 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:59,868 INFO  L134       CoverageAnalysis]: Checked inductivity of 129 backedges. 115 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-10-13 18:00:59,869 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:59,870 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7
[2019-10-13 18:00:59,870 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437512213]
[2019-10-13 18:00:59,871 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-10-13 18:00:59,873 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:59,873 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-10-13 18:00:59,874 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 18:00:59,875 INFO  L87              Difference]: Start difference. First operand 4155 states and 5503 transitions. Second operand 7 states.
[2019-10-13 18:01:01,710 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:01:01,710 INFO  L93              Difference]: Finished difference Result 8394 states and 11573 transitions.
[2019-10-13 18:01:01,711 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 18:01:01,711 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 256
[2019-10-13 18:01:01,711 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:01:01,732 INFO  L225             Difference]: With dead ends: 8394
[2019-10-13 18:01:01,732 INFO  L226             Difference]: Without dead ends: 4245
[2019-10-13 18:01:01,742 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 263 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72
[2019-10-13 18:01:01,747 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4245 states.
[2019-10-13 18:01:01,953 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 4155.
[2019-10-13 18:01:01,954 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4155 states.
[2019-10-13 18:01:01,967 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4155 states to 4155 states and 5231 transitions.
[2019-10-13 18:01:01,967 INFO  L78                 Accepts]: Start accepts. Automaton has 4155 states and 5231 transitions. Word has length 256
[2019-10-13 18:01:01,968 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:01:01,968 INFO  L462      AbstractCegarLoop]: Abstraction has 4155 states and 5231 transitions.
[2019-10-13 18:01:01,968 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-10-13 18:01:01,969 INFO  L276                IsEmpty]: Start isEmpty. Operand 4155 states and 5231 transitions.
[2019-10-13 18:01:01,975 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 263
[2019-10-13 18:01:01,976 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:01:01,976 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:01:02,189 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:01:02,190 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:01:02,190 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:01:02,191 INFO  L82        PathProgramCache]: Analyzing trace with hash -456438930, now seen corresponding path program 1 times
[2019-10-13 18:01:02,192 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:01:02,192 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376507183]
[2019-10-13 18:01:02,192 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:01:02,192 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:01:02,192 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:01:02,246 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:01:02,313 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:01:02,343 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:01:02,434 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:01:02,594 INFO  L134       CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2019-10-13 18:01:02,594 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376507183]
[2019-10-13 18:01:02,594 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546596450]
[2019-10-13 18:01:02,595 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:01:02,693 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:01:02,695 INFO  L256         TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 9 conjunts are in the unsatisfiable core
[2019-10-13 18:01:02,699 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:01:02,717 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:01:02,718 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:01:06,932 WARN  L191               SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 24 DAG size of output: 22
[2019-10-13 18:01:11,639 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-13 18:01:11,750 INFO  L134       CoverageAnalysis]: Checked inductivity of 133 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked.
[2019-10-13 18:01:11,751 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:01:11,751 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 12
[2019-10-13 18:01:11,752 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213902904]
[2019-10-13 18:01:11,753 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 12 states
[2019-10-13 18:01:11,753 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:01:11,753 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2019-10-13 18:01:11,754 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=96, Unknown=2, NotChecked=0, Total=132
[2019-10-13 18:01:11,754 INFO  L87              Difference]: Start difference. First operand 4155 states and 5231 transitions. Second operand 12 states.