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_label09.c


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This is Ultimate 0.1.24-f4eb214f-m
[2019-10-13 17:59:28,042 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-13 17:59:28,044 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-13 17:59:28,074 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2019-10-13 17:59:28,094 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 17:59:28,109 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-13 17:59:28,109 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-13 17:59:28,111 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-13 17:59:28,111 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-13 17:59:28,111 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-13 17:59:28,111 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-13 17:59:28,112 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-13 17:59:28,112 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-13 17:59:28,112 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-13 17:59:28,112 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-13 17:59:28,112 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-13 17:59:28,112 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-13 17:59:28,113 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-13 17:59:28,113 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-13 17:59:28,113 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-13 17:59:28,113 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-13 17:59:28,113 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-13 17:59:28,114 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-13 17:59:28,114 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-13 17:59:28,114 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-13 17:59:28,114 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-13 17:59:28,115 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-13 17:59:28,115 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-13 17:59:28,115 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-13 17:59:28,115 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-13 17:59:28,115 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-13 17:59:28,116 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-13 17:59:28,116 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-13 17:59:28,116 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-13 17:59:28,396 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-13 17:59:28,410 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-13 17:59:28,414 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-13 17:59:28,415 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-13 17:59:28,415 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-13 17:59:28,416 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label09.c
[2019-10-13 17:59:28,497 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cadbd78b/5f1e773639a0479d8841fa6ae3ae56b1/FLAGd52d5542a
[2019-10-13 17:59:29,129 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-13 17:59:29,130 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label09.c
[2019-10-13 17:59:29,147 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cadbd78b/5f1e773639a0479d8841fa6ae3ae56b1/FLAGd52d5542a
[2019-10-13 17:59:29,323 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cadbd78b/5f1e773639a0479d8841fa6ae3ae56b1
[2019-10-13 17:59:29,335 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-13 17:59:29,339 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-13 17:59:29,342 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-13 17:59:29,342 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-13 17:59:29,346 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-13 17:59:29,347 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:29" (1/1) ...
[2019-10-13 17:59:29,350 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c0ba10c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:29, skipping insertion in model container
[2019-10-13 17:59:29,350 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:59:29" (1/1) ...
[2019-10-13 17:59:29,360 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-13 17:59:29,432 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-13 17:59:30,141 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 17:59:30,149 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-13 17:59:30,334 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-13 17:59:30,351 INFO  L192         MainTranslator]: Completed translation
[2019-10-13 17:59:30,352 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30 WrapperNode
[2019-10-13 17:59:30,352 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-13 17:59:30,353 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-13 17:59:30,353 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-13 17:59:30,353 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-13 17:59:30,367 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30" (1/1) ...
[2019-10-13 17:59:30,367 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30" (1/1) ...
[2019-10-13 17:59:30,405 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30" (1/1) ...
[2019-10-13 17:59:30,405 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30" (1/1) ...
[2019-10-13 17:59:30,512 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30" (1/1) ...
[2019-10-13 17:59:30,534 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30" (1/1) ...
[2019-10-13 17:59:30,565 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30" (1/1) ...
[2019-10-13 17:59:30,584 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-13 17:59:30,585 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-13 17:59:30,585 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-13 17:59:30,586 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-13 17:59:30,587 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30" (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 17:59:30,680 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-13 17:59:30,680 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-13 17:59:30,680 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-13 17:59:30,680 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-13 17:59:30,680 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-13 17:59:30,681 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-13 17:59:30,681 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-13 17:59:30,682 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-13 17:59:30,682 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-13 17:59:30,682 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-13 17:59:30,682 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-13 17:59:32,558 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-13 17:59:32,558 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-13 17:59:32,560 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:32 BoogieIcfgContainer
[2019-10-13 17:59:32,560 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-13 17:59:32,563 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-13 17:59:32,563 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-13 17:59:32,567 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-13 17:59:32,567 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:59:29" (1/3) ...
[2019-10-13 17:59:32,568 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3448f856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:32, skipping insertion in model container
[2019-10-13 17:59:32,569 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:59:30" (2/3) ...
[2019-10-13 17:59:32,569 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3448f856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:59:32, skipping insertion in model container
[2019-10-13 17:59:32,570 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:59:32" (3/3) ...
[2019-10-13 17:59:32,572 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label09.c
[2019-10-13 17:59:32,584 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-13 17:59:32,593 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-13 17:59:32,605 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-13 17:59:32,637 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-13 17:59:32,637 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-13 17:59:32,637 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-13 17:59:32,638 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-13 17:59:32,638 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-13 17:59:32,638 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-13 17:59:32,638 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-13 17:59:32,638 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-13 17:59:32,666 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-10-13 17:59:32,677 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 73
[2019-10-13 17:59:32,677 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:59:32,678 INFO  L380         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 17:59:32,680 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:59:32,687 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:59:32,688 INFO  L82        PathProgramCache]: Analyzing trace with hash -869319573, now seen corresponding path program 1 times
[2019-10-13 17:59:32,698 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:59:32,698 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297857867]
[2019-10-13 17:59:32,698 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:32,699 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:32,699 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:59:32,860 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:33,185 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:33,226 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 17:59:33,227 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297857867]
[2019-10-13 17:59:33,228 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 17:59:33,228 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-13 17:59:33,228 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276643622]
[2019-10-13 17:59:33,233 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 17:59:33,234 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:59:33,247 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 17:59:33,248 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 17:59:33,251 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-10-13 17:59:36,703 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 17:59:36,703 INFO  L93              Difference]: Finished difference Result 993 states and 1777 transitions.
[2019-10-13 17:59:36,704 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 17:59:36,706 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 72
[2019-10-13 17:59:36,706 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 17:59:36,747 INFO  L225             Difference]: With dead ends: 993
[2019-10-13 17:59:36,748 INFO  L226             Difference]: Without dead ends: 632
[2019-10-13 17:59:36,765 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2019-10-13 17:59:36,791 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 632 states.
[2019-10-13 17:59:36,918 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 628.
[2019-10-13 17:59:36,919 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 628 states.
[2019-10-13 17:59:36,924 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 886 transitions.
[2019-10-13 17:59:36,926 INFO  L78                 Accepts]: Start accepts. Automaton has 628 states and 886 transitions. Word has length 72
[2019-10-13 17:59:36,927 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 17:59:36,927 INFO  L462      AbstractCegarLoop]: Abstraction has 628 states and 886 transitions.
[2019-10-13 17:59:36,928 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 17:59:36,929 INFO  L276                IsEmpty]: Start isEmpty. Operand 628 states and 886 transitions.
[2019-10-13 17:59:36,946 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 153
[2019-10-13 17:59:36,946 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:59:36,948 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-13 17:59:36,948 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:59:36,949 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:59:36,950 INFO  L82        PathProgramCache]: Analyzing trace with hash -1437675110, now seen corresponding path program 1 times
[2019-10-13 17:59:36,950 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:59:36,950 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798855914]
[2019-10-13 17:59:36,951 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:36,951 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:36,951 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:59:37,034 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:37,175 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:37,223 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:37,344 INFO  L134       CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:59:37,345 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798855914]
[2019-10-13 17:59:37,345 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-13 17:59:37,345 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-13 17:59:37,346 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391210831]
[2019-10-13 17:59:37,350 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 17:59:37,351 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:59:37,351 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 17:59:37,351 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-13 17:59:37,351 INFO  L87              Difference]: Start difference. First operand 628 states and 886 transitions. Second operand 8 states.
[2019-10-13 17:59:40,198 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 17:59:40,198 INFO  L93              Difference]: Finished difference Result 1873 states and 2696 transitions.
[2019-10-13 17:59:40,198 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2019-10-13 17:59:40,199 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 152
[2019-10-13 17:59:40,199 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 17:59:40,206 INFO  L225             Difference]: With dead ends: 1873
[2019-10-13 17:59:40,207 INFO  L226             Difference]: Without dead ends: 1251
[2019-10-13 17:59:40,209 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 17:59:40,211 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1251 states.
[2019-10-13 17:59:40,255 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1226.
[2019-10-13 17:59:40,256 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1226 states.
[2019-10-13 17:59:40,261 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 1619 transitions.
[2019-10-13 17:59:40,262 INFO  L78                 Accepts]: Start accepts. Automaton has 1226 states and 1619 transitions. Word has length 152
[2019-10-13 17:59:40,264 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 17:59:40,265 INFO  L462      AbstractCegarLoop]: Abstraction has 1226 states and 1619 transitions.
[2019-10-13 17:59:40,265 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-13 17:59:40,265 INFO  L276                IsEmpty]: Start isEmpty. Operand 1226 states and 1619 transitions.
[2019-10-13 17:59:40,275 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 204
[2019-10-13 17:59:40,276 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:59:40,276 INFO  L380         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-13 17:59:40,276 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:59:40,277 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:59:40,277 INFO  L82        PathProgramCache]: Analyzing trace with hash 1147537460, now seen corresponding path program 1 times
[2019-10-13 17:59:40,277 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:59:40,277 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974769202]
[2019-10-13 17:59:40,278 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:40,278 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:40,278 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:59:40,321 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:40,453 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:40,492 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:40,595 INFO  L134       CoverageAnalysis]: Checked inductivity of 65 backedges. 61 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:59:40,595 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974769202]
[2019-10-13 17:59:40,596 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102842321]
[2019-10-13 17:59:40,596 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 17:59:40,719 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:40,722 INFO  L256         TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 17:59:40,733 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 17:59:40,857 INFO  L134       CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:59:40,858 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 17:59:40,858 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8
[2019-10-13 17:59:40,858 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926357221]
[2019-10-13 17:59:40,859 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 17:59:40,859 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:59:40,859 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 17:59:40,860 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2019-10-13 17:59:40,860 INFO  L87              Difference]: Start difference. First operand 1226 states and 1619 transitions. Second operand 3 states.
[2019-10-13 17:59:41,973 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 17:59:41,974 INFO  L93              Difference]: Finished difference Result 3612 states and 4883 transitions.
[2019-10-13 17:59:41,974 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 17:59:41,974 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 203
[2019-10-13 17:59:41,976 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 17:59:41,990 INFO  L225             Difference]: With dead ends: 3612
[2019-10-13 17:59:41,990 INFO  L226             Difference]: Without dead ends: 2392
[2019-10-13 17:59:41,995 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2019-10-13 17:59:41,999 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2392 states.
[2019-10-13 17:59:42,062 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2392 to 2189.
[2019-10-13 17:59:42,063 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2189 states.
[2019-10-13 17:59:42,073 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 2912 transitions.
[2019-10-13 17:59:42,073 INFO  L78                 Accepts]: Start accepts. Automaton has 2189 states and 2912 transitions. Word has length 203
[2019-10-13 17:59:42,074 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 17:59:42,074 INFO  L462      AbstractCegarLoop]: Abstraction has 2189 states and 2912 transitions.
[2019-10-13 17:59:42,074 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 17:59:42,074 INFO  L276                IsEmpty]: Start isEmpty. Operand 2189 states and 2912 transitions.
[2019-10-13 17:59:42,080 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 239
[2019-10-13 17:59:42,081 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:59:42,081 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:42,294 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 17:59:42,295 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:59:42,295 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:59:42,295 INFO  L82        PathProgramCache]: Analyzing trace with hash 331775261, now seen corresponding path program 1 times
[2019-10-13 17:59:42,296 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:59:42,296 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689025069]
[2019-10-13 17:59:42,296 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:42,296 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:42,296 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:59:42,341 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:42,454 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:42,495 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:42,586 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:42,715 INFO  L134       CoverageAnalysis]: Checked inductivity of 202 backedges. 130 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2019-10-13 17:59:42,716 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689025069]
[2019-10-13 17:59:42,716 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765496540]
[2019-10-13 17:59:42,716 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 17:59:42,846 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:42,848 INFO  L256         TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-13 17:59:42,854 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 17:59:42,965 INFO  L134       CoverageAnalysis]: Checked inductivity of 202 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked.
[2019-10-13 17:59:42,965 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 17:59:42,966 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11
[2019-10-13 17:59:42,966 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240325072]
[2019-10-13 17:59:42,968 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-13 17:59:42,968 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:59:42,968 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-13 17:59:42,968 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110
[2019-10-13 17:59:42,969 INFO  L87              Difference]: Start difference. First operand 2189 states and 2912 transitions. Second operand 5 states.
[2019-10-13 17:59:44,480 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 17:59:44,480 INFO  L93              Difference]: Finished difference Result 5406 states and 7546 transitions.
[2019-10-13 17:59:44,480 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-13 17:59:44,481 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 238
[2019-10-13 17:59:44,483 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 17:59:44,503 INFO  L225             Difference]: With dead ends: 5406
[2019-10-13 17:59:44,503 INFO  L226             Difference]: Without dead ends: 3223
[2019-10-13 17:59:44,510 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182
[2019-10-13 17:59:44,515 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3223 states.
[2019-10-13 17:59:44,612 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3223 to 3183.
[2019-10-13 17:59:44,613 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3183 states.
[2019-10-13 17:59:44,628 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 4270 transitions.
[2019-10-13 17:59:44,629 INFO  L78                 Accepts]: Start accepts. Automaton has 3183 states and 4270 transitions. Word has length 238
[2019-10-13 17:59:44,630 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 17:59:44,630 INFO  L462      AbstractCegarLoop]: Abstraction has 3183 states and 4270 transitions.
[2019-10-13 17:59:44,630 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-13 17:59:44,630 INFO  L276                IsEmpty]: Start isEmpty. Operand 3183 states and 4270 transitions.
[2019-10-13 17:59:44,637 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 240
[2019-10-13 17:59:44,637 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:59:44,637 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 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 17:59:44,841 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 17:59:44,842 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:59:44,842 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:59:44,842 INFO  L82        PathProgramCache]: Analyzing trace with hash -1251397776, now seen corresponding path program 1 times
[2019-10-13 17:59:44,842 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:59:44,843 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602698342]
[2019-10-13 17:59:44,843 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:44,843 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:44,843 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:59:44,882 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:44,967 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:44,984 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:45,015 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:45,178 INFO  L134       CoverageAnalysis]: Checked inductivity of 203 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-10-13 17:59:45,179 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602698342]
[2019-10-13 17:59:45,179 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989447584]
[2019-10-13 17:59:45,179 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 17:59:45,304 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:45,306 INFO  L256         TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 17:59:45,317 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 17:59:45,392 INFO  L134       CoverageAnalysis]: Checked inductivity of 203 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-10-13 17:59:45,392 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 17:59:45,393 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-13 17:59:45,393 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426387441]
[2019-10-13 17:59:45,393 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 17:59:45,394 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:59:45,394 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 17:59:45,394 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 17:59:45,394 INFO  L87              Difference]: Start difference. First operand 3183 states and 4270 transitions. Second operand 3 states.
[2019-10-13 17:59:46,390 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 17:59:46,390 INFO  L93              Difference]: Finished difference Result 7147 states and 9731 transitions.
[2019-10-13 17:59:46,396 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 17:59:46,396 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 239
[2019-10-13 17:59:46,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 17:59:46,423 INFO  L225             Difference]: With dead ends: 7147
[2019-10-13 17:59:46,423 INFO  L226             Difference]: Without dead ends: 4158
[2019-10-13 17:59:46,433 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 244 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-13 17:59:46,439 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4158 states.
[2019-10-13 17:59:46,584 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 3953.
[2019-10-13 17:59:46,584 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3953 states.
[2019-10-13 17:59:46,602 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 5305 transitions.
[2019-10-13 17:59:46,603 INFO  L78                 Accepts]: Start accepts. Automaton has 3953 states and 5305 transitions. Word has length 239
[2019-10-13 17:59:46,604 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 17:59:46,610 INFO  L462      AbstractCegarLoop]: Abstraction has 3953 states and 5305 transitions.
[2019-10-13 17:59:46,610 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 17:59:46,610 INFO  L276                IsEmpty]: Start isEmpty. Operand 3953 states and 5305 transitions.
[2019-10-13 17:59:46,621 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 285
[2019-10-13 17:59:46,621 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 17:59:46,621 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:59:46,825 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 17:59:46,826 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 17:59:46,826 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 17:59:46,826 INFO  L82        PathProgramCache]: Analyzing trace with hash -1992228476, now seen corresponding path program 1 times
[2019-10-13 17:59:46,827 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 17:59:46,827 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957201062]
[2019-10-13 17:59:46,828 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:46,828 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 17:59:46,828 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 17:59:46,877 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:46,978 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:47,018 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:47,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:47,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 211 backedges. 7 proven. 129 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked.
[2019-10-13 17:59:47,224 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957201062]
[2019-10-13 17:59:47,224 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001540070]
[2019-10-13 17:59:47,224 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 17:59:47,322 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 17:59:47,324 INFO  L256         TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-10-13 17:59:47,328 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 17:59:47,511 INFO  L134       CoverageAnalysis]: Checked inductivity of 211 backedges. 209 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-13 17:59:47,512 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 17:59:47,512 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 14
[2019-10-13 17:59:47,512 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377564620]
[2019-10-13 17:59:47,514 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 14 states
[2019-10-13 17:59:47,514 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 17:59:47,514 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2019-10-13 17:59:47,514 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182
[2019-10-13 17:59:47,514 INFO  L87              Difference]: Start difference. First operand 3953 states and 5305 transitions. Second operand 14 states.
[2019-10-13 17:59:59,722 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 17:59:59,722 INFO  L93              Difference]: Finished difference Result 14359 states and 21427 transitions.
[2019-10-13 17:59:59,723 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. 
[2019-10-13 17:59:59,723 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 284
[2019-10-13 17:59:59,723 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 17:59:59,781 INFO  L225             Difference]: With dead ends: 14359
[2019-10-13 17:59:59,782 INFO  L226             Difference]: Without dead ends: 10600
[2019-10-13 17:59:59,799 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2613 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1213, Invalid=5927, Unknown=0, NotChecked=0, Total=7140
[2019-10-13 17:59:59,810 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 10600 states.
[2019-10-13 18:00:00,118 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 10600 to 9889.
[2019-10-13 18:00:00,118 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9889 states.
[2019-10-13 18:00:00,146 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9889 states to 9889 states and 13534 transitions.
[2019-10-13 18:00:00,147 INFO  L78                 Accepts]: Start accepts. Automaton has 9889 states and 13534 transitions. Word has length 284
[2019-10-13 18:00:00,147 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:00,147 INFO  L462      AbstractCegarLoop]: Abstraction has 9889 states and 13534 transitions.
[2019-10-13 18:00:00,148 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2019-10-13 18:00:00,148 INFO  L276                IsEmpty]: Start isEmpty. Operand 9889 states and 13534 transitions.
[2019-10-13 18:00:00,167 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 290
[2019-10-13 18:00:00,168 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:00,168 INFO  L380         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:00,376 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:00,377 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:00,377 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:00,377 INFO  L82        PathProgramCache]: Analyzing trace with hash -588146601, now seen corresponding path program 1 times
[2019-10-13 18:00:00,377 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:00,377 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666629109]
[2019-10-13 18:00:00,378 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:00,378 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:00,378 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:00,472 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:00,557 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:00,573 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:00,605 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:00,757 INFO  L134       CoverageAnalysis]: Checked inductivity of 203 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-10-13 18:00:00,757 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666629109]
[2019-10-13 18:00:00,759 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065862211]
[2019-10-13 18:00:00,759 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 18:00:00,931 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:00,933 INFO  L256         TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-13 18:00:00,938 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:01,042 INFO  L134       CoverageAnalysis]: Checked inductivity of 203 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-10-13 18:00:01,043 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-13 18:00:01,044 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5
[2019-10-13 18:00:01,044 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621772192]
[2019-10-13 18:00:01,045 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-13 18:00:01,045 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:01,046 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-13 18:00:01,046 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-13 18:00:01,046 INFO  L87              Difference]: Start difference. First operand 9889 states and 13534 transitions. Second operand 3 states.
[2019-10-13 18:00:02,291 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-13 18:00:02,291 INFO  L93              Difference]: Finished difference Result 22828 states and 31926 transitions.
[2019-10-13 18:00:02,291 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-13 18:00:02,292 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 289
[2019-10-13 18:00:02,292 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-13 18:00:02,353 INFO  L225             Difference]: With dead ends: 22828
[2019-10-13 18:00:02,353 INFO  L226             Difference]: Without dead ends: 13323
[2019-10-13 18:00:02,382 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 294 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 18:00:02,400 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13323 states.
[2019-10-13 18:00:02,733 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13323 to 11805.
[2019-10-13 18:00:02,734 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 11805 states.
[2019-10-13 18:00:02,762 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 11805 states to 11805 states and 15835 transitions.
[2019-10-13 18:00:02,763 INFO  L78                 Accepts]: Start accepts. Automaton has 11805 states and 15835 transitions. Word has length 289
[2019-10-13 18:00:02,763 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-13 18:00:02,765 INFO  L462      AbstractCegarLoop]: Abstraction has 11805 states and 15835 transitions.
[2019-10-13 18:00:02,765 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-13 18:00:02,765 INFO  L276                IsEmpty]: Start isEmpty. Operand 11805 states and 15835 transitions.
[2019-10-13 18:00:02,792 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 307
[2019-10-13 18:00:02,792 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-13 18:00:02,793 INFO  L380         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-13 18:00:03,005 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:03,005 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-13 18:00:03,005 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-13 18:00:03,006 INFO  L82        PathProgramCache]: Analyzing trace with hash -247122996, now seen corresponding path program 1 times
[2019-10-13 18:00:03,006 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-13 18:00:03,006 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827613401]
[2019-10-13 18:00:03,006 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:03,006 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-13 18:00:03,007 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-13 18:00:03,053 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,212 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,261 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,297 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,331 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,518 INFO  L134       CoverageAnalysis]: Checked inductivity of 421 backedges. 342 proven. 4 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked.
[2019-10-13 18:00:03,519 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827613401]
[2019-10-13 18:00:03,519 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935957508]
[2019-10-13 18:00:03,522 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-13 18:00:03,645 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-13 18:00:03,647 INFO  L256         TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-10-13 18:00:03,652 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-13 18:00:03,790 INFO  L134       CoverageAnalysis]: Checked inductivity of 421 backedges. 349 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked.
[2019-10-13 18:00:03,791 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-13 18:00:03,791 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8
[2019-10-13 18:00:03,791 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440240998]
[2019-10-13 18:00:03,794 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-13 18:00:03,794 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-13 18:00:03,795 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-13 18:00:03,800 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-13 18:00:03,801 INFO  L87              Difference]: Start difference. First operand 11805 states and 15835 transitions. Second operand 8 states.