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_label28.c


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This is Ultimate 0.1.24-13a467a-m
[2019-10-14 21:59:04,985 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-10-14 21:59:04,988 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
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[2019-10-14 21:59:05,072 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2019-10-14 21:59:05,098 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-10-14 21:59:05,099 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-10-14 21:59:05,100 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-10-14 21:59:05,101 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-10-14 21:59:05,101 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-10-14 21:59:05,101 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-10-14 21:59:05,101 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-10-14 21:59:05,102 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-10-14 21:59:05,102 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-10-14 21:59:05,102 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-10-14 21:59:05,102 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-10-14 21:59:05,102 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-10-14 21:59:05,102 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-10-14 21:59:05,103 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-10-14 21:59:05,103 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-10-14 21:59:05,103 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-10-14 21:59:05,105 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-10-14 21:59:05,105 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-10-14 21:59:05,105 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-10-14 21:59:05,106 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-10-14 21:59:05,107 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-10-14 21:59:05,108 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 21:59:05,108 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-10-14 21:59:05,109 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-10-14 21:59:05,109 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-10-14 21:59:05,109 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-10-14 21:59:05,110 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-10-14 21:59:05,110 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-10-14 21:59:05,111 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2019-10-14 21:59:05,388 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-10-14 21:59:05,402 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-10-14 21:59:05,406 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-10-14 21:59:05,407 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-10-14 21:59:05,408 INFO  L275        PluginConnector]: CDTParser initialized
[2019-10-14 21:59:05,408 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label28.c
[2019-10-14 21:59:05,494 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2756c902/a3a186510bf44f1f9a72882a72d82eb4/FLAG3ec2c2e5a
[2019-10-14 21:59:06,141 INFO  L306              CDTParser]: Found 1 translation units.
[2019-10-14 21:59:06,142 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label28.c
[2019-10-14 21:59:06,165 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2756c902/a3a186510bf44f1f9a72882a72d82eb4/FLAG3ec2c2e5a
[2019-10-14 21:59:06,338 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2756c902/a3a186510bf44f1f9a72882a72d82eb4
[2019-10-14 21:59:06,349 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-10-14 21:59:06,351 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-10-14 21:59:06,352 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-10-14 21:59:06,352 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-10-14 21:59:06,355 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-10-14 21:59:06,357 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:06" (1/1) ...
[2019-10-14 21:59:06,360 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ff2df9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:06, skipping insertion in model container
[2019-10-14 21:59:06,361 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:06" (1/1) ...
[2019-10-14 21:59:06,369 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-10-14 21:59:06,445 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-10-14 21:59:07,398 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:59:07,406 INFO  L188         MainTranslator]: Completed pre-run
[2019-10-14 21:59:07,612 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-10-14 21:59:07,635 INFO  L192         MainTranslator]: Completed translation
[2019-10-14 21:59:07,636 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07 WrapperNode
[2019-10-14 21:59:07,636 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-10-14 21:59:07,637 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-10-14 21:59:07,637 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-10-14 21:59:07,638 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-10-14 21:59:07,651 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07" (1/1) ...
[2019-10-14 21:59:07,652 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07" (1/1) ...
[2019-10-14 21:59:07,678 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07" (1/1) ...
[2019-10-14 21:59:07,679 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07" (1/1) ...
[2019-10-14 21:59:07,745 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07" (1/1) ...
[2019-10-14 21:59:07,774 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07" (1/1) ...
[2019-10-14 21:59:07,787 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07" (1/1) ...
[2019-10-14 21:59:07,801 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-10-14 21:59:07,802 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-10-14 21:59:07,802 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-10-14 21:59:07,802 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-10-14 21:59:07,803 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-10-14 21:59:07,872 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-10-14 21:59:07,873 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-10-14 21:59:07,873 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2019-10-14 21:59:07,873 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-10-14 21:59:07,873 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2019-10-14 21:59:07,873 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-10-14 21:59:07,874 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-10-14 21:59:07,874 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2019-10-14 21:59:07,874 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-10-14 21:59:07,874 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-10-14 21:59:07,874 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-10-14 21:59:09,632 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-10-14 21:59:09,632 INFO  L284             CfgBuilder]: Removed 1 assume(true) statements.
[2019-10-14 21:59:09,634 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:09 BoogieIcfgContainer
[2019-10-14 21:59:09,634 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-10-14 21:59:09,636 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-10-14 21:59:09,636 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-10-14 21:59:09,640 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-10-14 21:59:09,640 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:59:06" (1/3) ...
[2019-10-14 21:59:09,642 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9704cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:09, skipping insertion in model container
[2019-10-14 21:59:09,642 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:07" (2/3) ...
[2019-10-14 21:59:09,642 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f9704cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:09, skipping insertion in model container
[2019-10-14 21:59:09,643 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:09" (3/3) ...
[2019-10-14 21:59:09,645 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem11_label28.c
[2019-10-14 21:59:09,655 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-10-14 21:59:09,664 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-10-14 21:59:09,677 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-10-14 21:59:09,709 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-10-14 21:59:09,710 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-10-14 21:59:09,710 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-10-14 21:59:09,710 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-10-14 21:59:09,711 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-10-14 21:59:09,711 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-10-14 21:59:09,711 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-10-14 21:59:09,711 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-10-14 21:59:09,741 INFO  L276                IsEmpty]: Start isEmpty. Operand 292 states.
[2019-10-14 21:59:09,751 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2019-10-14 21:59:09,752 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:09,753 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]
[2019-10-14 21:59:09,755 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:09,761 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:09,762 INFO  L82        PathProgramCache]: Analyzing trace with hash -1610348989, now seen corresponding path program 1 times
[2019-10-14 21:59:09,773 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:09,774 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999174816]
[2019-10-14 21:59:09,774 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:09,774 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:09,775 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:09,931 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:10,230 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:10,252 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:10,252 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999174816]
[2019-10-14 21:59:10,253 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:59:10,254 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-10-14 21:59:10,254 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690328540]
[2019-10-14 21:59:10,259 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:59:10,259 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:10,274 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:59:10,275 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2019-10-14 21:59:10,278 INFO  L87              Difference]: Start difference. First operand 292 states. Second operand 5 states.
[2019-10-14 21:59:13,796 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:13,796 INFO  L93              Difference]: Finished difference Result 990 states and 1774 transitions.
[2019-10-14 21:59:13,796 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:59:13,798 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 54
[2019-10-14 21:59:13,798 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:13,851 INFO  L225             Difference]: With dead ends: 990
[2019-10-14 21:59:13,853 INFO  L226             Difference]: Without dead ends: 629
[2019-10-14 21:59:13,873 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
[2019-10-14 21:59:13,900 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 629 states.
[2019-10-14 21:59:14,023 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 625.
[2019-10-14 21:59:14,025 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 625 states.
[2019-10-14 21:59:14,029 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 865 transitions.
[2019-10-14 21:59:14,030 INFO  L78                 Accepts]: Start accepts. Automaton has 625 states and 865 transitions. Word has length 54
[2019-10-14 21:59:14,031 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:14,031 INFO  L462      AbstractCegarLoop]: Abstraction has 625 states and 865 transitions.
[2019-10-14 21:59:14,031 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:59:14,032 INFO  L276                IsEmpty]: Start isEmpty. Operand 625 states and 865 transitions.
[2019-10-14 21:59:14,046 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 128
[2019-10-14 21:59:14,046 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:14,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:59:14,047 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:14,047 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:14,047 INFO  L82        PathProgramCache]: Analyzing trace with hash -1973618443, now seen corresponding path program 1 times
[2019-10-14 21:59:14,048 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:14,048 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113421726]
[2019-10-14 21:59:14,048 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:14,049 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:14,049 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:14,148 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:14,263 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:14,297 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:14,368 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:14,369 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113421726]
[2019-10-14 21:59:14,369 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70254780]
[2019-10-14 21:59:14,370 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:14,461 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:14,464 INFO  L256         TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:59:14,474 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:14,540 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:14,541 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:59:14,541 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-14 21:59:14,541 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513085389]
[2019-10-14 21:59:14,543 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:59:14,544 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:14,544 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:59:14,544 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:14,544 INFO  L87              Difference]: Start difference. First operand 625 states and 865 transitions. Second operand 3 states.
[2019-10-14 21:59:15,641 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:15,642 INFO  L93              Difference]: Finished difference Result 1826 states and 2564 transitions.
[2019-10-14 21:59:15,642 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:59:15,642 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 127
[2019-10-14 21:59:15,643 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:15,650 INFO  L225             Difference]: With dead ends: 1826
[2019-10-14 21:59:15,650 INFO  L226             Difference]: Without dead ends: 1207
[2019-10-14 21:59:15,653 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:15,654 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1207 states.
[2019-10-14 21:59:15,686 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 1197.
[2019-10-14 21:59:15,686 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1197 states.
[2019-10-14 21:59:15,691 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1562 transitions.
[2019-10-14 21:59:15,692 INFO  L78                 Accepts]: Start accepts. Automaton has 1197 states and 1562 transitions. Word has length 127
[2019-10-14 21:59:15,693 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:15,693 INFO  L462      AbstractCegarLoop]: Abstraction has 1197 states and 1562 transitions.
[2019-10-14 21:59:15,693 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:59:15,693 INFO  L276                IsEmpty]: Start isEmpty. Operand 1197 states and 1562 transitions.
[2019-10-14 21:59:15,696 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 129
[2019-10-14 21:59:15,696 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:15,696 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:59:15,900 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:15,901 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:15,901 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:15,901 INFO  L82        PathProgramCache]: Analyzing trace with hash 1882924734, now seen corresponding path program 1 times
[2019-10-14 21:59:15,902 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:15,902 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697654217]
[2019-10-14 21:59:15,903 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:15,903 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:15,903 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:15,930 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,005 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,036 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,080 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 46 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:16,081 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697654217]
[2019-10-14 21:59:16,081 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739677902]
[2019-10-14 21:59:16,081 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:16,148 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:16,149 INFO  L256         TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:59:16,154 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:16,236 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:16,237 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:59:16,237 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7
[2019-10-14 21:59:16,237 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530660468]
[2019-10-14 21:59:16,238 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:59:16,238 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:16,238 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:59:16,239 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:16,239 INFO  L87              Difference]: Start difference. First operand 1197 states and 1562 transitions. Second operand 3 states.
[2019-10-14 21:59:17,297 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:17,297 INFO  L93              Difference]: Finished difference Result 2970 states and 3983 transitions.
[2019-10-14 21:59:17,297 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:59:17,298 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 128
[2019-10-14 21:59:17,298 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:17,309 INFO  L225             Difference]: With dead ends: 2970
[2019-10-14 21:59:17,310 INFO  L226             Difference]: Without dead ends: 1779
[2019-10-14 21:59:17,313 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:17,317 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1779 states.
[2019-10-14 21:59:17,376 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1779 to 1769.
[2019-10-14 21:59:17,376 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1769 states.
[2019-10-14 21:59:17,386 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2354 transitions.
[2019-10-14 21:59:17,387 INFO  L78                 Accepts]: Start accepts. Automaton has 1769 states and 2354 transitions. Word has length 128
[2019-10-14 21:59:17,388 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:17,389 INFO  L462      AbstractCegarLoop]: Abstraction has 1769 states and 2354 transitions.
[2019-10-14 21:59:17,389 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:59:17,389 INFO  L276                IsEmpty]: Start isEmpty. Operand 1769 states and 2354 transitions.
[2019-10-14 21:59:17,393 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 135
[2019-10-14 21:59:17,393 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:17,393 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:59:17,597 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:17,598 INFO  L410      AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:17,598 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:17,598 INFO  L82        PathProgramCache]: Analyzing trace with hash -1199392174, now seen corresponding path program 1 times
[2019-10-14 21:59:17,598 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:17,599 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960182945]
[2019-10-14 21:59:17,599 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:17,599 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:17,599 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:17,644 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:17,724 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:17,786 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:17,921 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:17,921 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960182945]
[2019-10-14 21:59:17,922 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-10-14 21:59:17,922 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-10-14 21:59:17,922 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793661503]
[2019-10-14 21:59:17,923 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 8 states
[2019-10-14 21:59:17,923 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:17,923 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2019-10-14 21:59:17,923 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56
[2019-10-14 21:59:17,924 INFO  L87              Difference]: Start difference. First operand 1769 states and 2354 transitions. Second operand 8 states.
[2019-10-14 21:59:20,829 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:20,829 INFO  L93              Difference]: Finished difference Result 4940 states and 6805 transitions.
[2019-10-14 21:59:20,830 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2019-10-14 21:59:20,830 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 134
[2019-10-14 21:59:20,830 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:20,847 INFO  L225             Difference]: With dead ends: 4940
[2019-10-14 21:59:20,848 INFO  L226             Difference]: Without dead ends: 3177
[2019-10-14 21:59:20,853 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
[2019-10-14 21:59:20,857 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3177 states.
[2019-10-14 21:59:20,932 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3177 to 3160.
[2019-10-14 21:59:20,932 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3160 states.
[2019-10-14 21:59:20,943 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3160 states to 3160 states and 4065 transitions.
[2019-10-14 21:59:20,944 INFO  L78                 Accepts]: Start accepts. Automaton has 3160 states and 4065 transitions. Word has length 134
[2019-10-14 21:59:20,944 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:20,944 INFO  L462      AbstractCegarLoop]: Abstraction has 3160 states and 4065 transitions.
[2019-10-14 21:59:20,945 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2019-10-14 21:59:20,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 3160 states and 4065 transitions.
[2019-10-14 21:59:20,948 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 186
[2019-10-14 21:59:20,948 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:20,948 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-10-14 21:59:20,949 INFO  L410      AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:20,949 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:20,949 INFO  L82        PathProgramCache]: Analyzing trace with hash -10605268, now seen corresponding path program 1 times
[2019-10-14 21:59:20,949 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:20,950 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370580556]
[2019-10-14 21:59:20,950 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:20,950 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:20,950 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:20,985 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:21,084 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:21,116 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:21,236 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:21,237 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370580556]
[2019-10-14 21:59:21,237 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109275018]
[2019-10-14 21:59:21,237 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:21,325 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:21,326 INFO  L256         TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:59:21,330 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:21,379 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:21,379 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:59:21,379 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8
[2019-10-14 21:59:21,380 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352019314]
[2019-10-14 21:59:21,380 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 3 states
[2019-10-14 21:59:21,380 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:21,381 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2019-10-14 21:59:21,381 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2019-10-14 21:59:21,381 INFO  L87              Difference]: Start difference. First operand 3160 states and 4065 transitions. Second operand 3 states.
[2019-10-14 21:59:22,419 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:22,419 INFO  L93              Difference]: Finished difference Result 6897 states and 9088 transitions.
[2019-10-14 21:59:22,420 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2019-10-14 21:59:22,420 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 185
[2019-10-14 21:59:22,421 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:22,438 INFO  L225             Difference]: With dead ends: 6897
[2019-10-14 21:59:22,438 INFO  L226             Difference]: Without dead ends: 3931
[2019-10-14 21:59:22,445 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56
[2019-10-14 21:59:22,450 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3931 states.
[2019-10-14 21:59:22,527 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3931 to 3360.
[2019-10-14 21:59:22,527 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3360 states.
[2019-10-14 21:59:22,538 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 4432 transitions.
[2019-10-14 21:59:22,539 INFO  L78                 Accepts]: Start accepts. Automaton has 3360 states and 4432 transitions. Word has length 185
[2019-10-14 21:59:22,539 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:22,539 INFO  L462      AbstractCegarLoop]: Abstraction has 3360 states and 4432 transitions.
[2019-10-14 21:59:22,540 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2019-10-14 21:59:22,540 INFO  L276                IsEmpty]: Start isEmpty. Operand 3360 states and 4432 transitions.
[2019-10-14 21:59:22,546 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 208
[2019-10-14 21:59:22,547 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:22,547 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, 2, 2, 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]
[2019-10-14 21:59:22,751 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:22,752 INFO  L410      AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:22,752 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:22,752 INFO  L82        PathProgramCache]: Analyzing trace with hash -91916028, now seen corresponding path program 1 times
[2019-10-14 21:59:22,753 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:22,753 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140000416]
[2019-10-14 21:59:22,753 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:22,754 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:22,754 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:22,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:22,937 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:22,972 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:23,061 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:23,215 INFO  L134       CoverageAnalysis]: Checked inductivity of 167 backedges. 66 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-14 21:59:23,216 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140000416]
[2019-10-14 21:59:23,216 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341181176]
[2019-10-14 21:59:23,216 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:23,309 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:23,311 INFO  L256         TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 11 conjunts are in the unsatisfiable core
[2019-10-14 21:59:23,317 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:23,367 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 3 terms
[2019-10-14 21:59:23,484 INFO  L134       CoverageAnalysis]: Checked inductivity of 167 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked.
[2019-10-14 21:59:23,484 INFO  L223   tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences.
[2019-10-14 21:59:23,485 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 15
[2019-10-14 21:59:23,485 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415922970]
[2019-10-14 21:59:23,486 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 5 states
[2019-10-14 21:59:23,486 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:23,486 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2019-10-14 21:59:23,486 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210
[2019-10-14 21:59:23,486 INFO  L87              Difference]: Start difference. First operand 3360 states and 4432 transitions. Second operand 5 states.
[2019-10-14 21:59:25,455 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:25,455 INFO  L93              Difference]: Finished difference Result 6980 states and 9288 transitions.
[2019-10-14 21:59:25,456 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-10-14 21:59:25,456 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 207
[2019-10-14 21:59:25,456 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:25,472 INFO  L225             Difference]: With dead ends: 6980
[2019-10-14 21:59:25,472 INFO  L226             Difference]: Without dead ends: 3626
[2019-10-14 21:59:25,481 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272
[2019-10-14 21:59:25,485 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3626 states.
[2019-10-14 21:59:25,561 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3626 to 3583.
[2019-10-14 21:59:25,561 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3583 states.
[2019-10-14 21:59:25,568 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4700 transitions.
[2019-10-14 21:59:25,568 INFO  L78                 Accepts]: Start accepts. Automaton has 3583 states and 4700 transitions. Word has length 207
[2019-10-14 21:59:25,568 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:25,569 INFO  L462      AbstractCegarLoop]: Abstraction has 3583 states and 4700 transitions.
[2019-10-14 21:59:25,569 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2019-10-14 21:59:25,569 INFO  L276                IsEmpty]: Start isEmpty. Operand 3583 states and 4700 transitions.
[2019-10-14 21:59:25,573 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 251
[2019-10-14 21:59:25,574 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:25,574 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-14 21:59:25,786 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:25,787 INFO  L410      AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:25,787 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:25,787 INFO  L82        PathProgramCache]: Analyzing trace with hash 563951691, now seen corresponding path program 1 times
[2019-10-14 21:59:25,787 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:25,788 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134435589]
[2019-10-14 21:59:25,788 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:25,788 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:25,788 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:25,848 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:25,957 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:25,994 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:26,067 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:26,279 INFO  L134       CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked.
[2019-10-14 21:59:26,280 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134435589]
[2019-10-14 21:59:26,281 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721327316]
[2019-10-14 21:59:26,281 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:26,383 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:26,385 INFO  L256         TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 4 conjunts are in the unsatisfiable core
[2019-10-14 21:59:26,390 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:26,416 INFO  L319       QuantifierPusher]: Applying distributivity, recursing on 2 terms
[2019-10-14 21:59:26,480 INFO  L134       CoverageAnalysis]: Checked inductivity of 174 backedges. 172 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:26,481 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:26,482 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 12
[2019-10-14 21:59:26,482 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365876218]
[2019-10-14 21:59:26,483 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 12 states
[2019-10-14 21:59:26,483 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:26,483 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2019-10-14 21:59:26,483 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132
[2019-10-14 21:59:26,484 INFO  L87              Difference]: Start difference. First operand 3583 states and 4700 transitions. Second operand 12 states.
[2019-10-14 21:59:36,295 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:36,295 INFO  L93              Difference]: Finished difference Result 11996 states and 17253 transitions.
[2019-10-14 21:59:36,296 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. 
[2019-10-14 21:59:36,296 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 250
[2019-10-14 21:59:36,297 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:36,335 INFO  L225             Difference]: With dead ends: 11996
[2019-10-14 21:59:36,336 INFO  L226             Difference]: Without dead ends: 8419
[2019-10-14 21:59:36,351 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=515, Invalid=2791, Unknown=0, NotChecked=0, Total=3306
[2019-10-14 21:59:36,360 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8419 states.
[2019-10-14 21:59:36,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8419 to 8106.
[2019-10-14 21:59:36,563 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8106 states.
[2019-10-14 21:59:36,586 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8106 states to 8106 states and 10240 transitions.
[2019-10-14 21:59:36,586 INFO  L78                 Accepts]: Start accepts. Automaton has 8106 states and 10240 transitions. Word has length 250
[2019-10-14 21:59:36,587 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:36,587 INFO  L462      AbstractCegarLoop]: Abstraction has 8106 states and 10240 transitions.
[2019-10-14 21:59:36,587 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2019-10-14 21:59:36,587 INFO  L276                IsEmpty]: Start isEmpty. Operand 8106 states and 10240 transitions.
[2019-10-14 21:59:36,598 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 293
[2019-10-14 21:59:36,598 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:36,598 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-14 21:59:36,805 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:36,806 INFO  L410      AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:36,806 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:36,807 INFO  L82        PathProgramCache]: Analyzing trace with hash 11397960, now seen corresponding path program 1 times
[2019-10-14 21:59:36,808 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:36,809 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066645096]
[2019-10-14 21:59:36,809 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:36,809 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:36,809 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:36,878 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:37,090 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:37,115 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:37,161 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:37,254 INFO  L134       CoverageAnalysis]: Checked inductivity of 201 backedges. 95 proven. 2 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked.
[2019-10-14 21:59:37,255 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066645096]
[2019-10-14 21:59:37,255 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532346015]
[2019-10-14 21:59:37,256 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
[2019-10-14 21:59:37,374 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:37,376 INFO  L256         TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 6 conjunts are in the unsatisfiable core
[2019-10-14 21:59:37,383 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:37,454 INFO  L134       CoverageAnalysis]: Checked inductivity of 201 backedges. 151 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2019-10-14 21:59:37,455 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:37,455 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7
[2019-10-14 21:59:37,455 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608987337]
[2019-10-14 21:59:37,456 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-10-14 21:59:37,457 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:37,457 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-10-14 21:59:37,457 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2019-10-14 21:59:37,457 INFO  L87              Difference]: Start difference. First operand 8106 states and 10240 transitions. Second operand 7 states.
[2019-10-14 21:59:40,142 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-10-14 21:59:40,142 INFO  L93              Difference]: Finished difference Result 22553 states and 30724 transitions.
[2019-10-14 21:59:40,143 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2019-10-14 21:59:40,143 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 292
[2019-10-14 21:59:40,144 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-10-14 21:59:40,229 INFO  L225             Difference]: With dead ends: 22553
[2019-10-14 21:59:40,229 INFO  L226             Difference]: Without dead ends: 14453
[2019-10-14 21:59:40,259 INFO  L600         BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110
[2019-10-14 21:59:40,281 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14453 states.
[2019-10-14 21:59:40,714 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14453 to 12542.
[2019-10-14 21:59:40,715 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12542 states.
[2019-10-14 21:59:40,743 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12542 states to 12542 states and 16071 transitions.
[2019-10-14 21:59:40,743 INFO  L78                 Accepts]: Start accepts. Automaton has 12542 states and 16071 transitions. Word has length 292
[2019-10-14 21:59:40,744 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-10-14 21:59:40,744 INFO  L462      AbstractCegarLoop]: Abstraction has 12542 states and 16071 transitions.
[2019-10-14 21:59:40,744 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-10-14 21:59:40,745 INFO  L276                IsEmpty]: Start isEmpty. Operand 12542 states and 16071 transitions.
[2019-10-14 21:59:40,762 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 334
[2019-10-14 21:59:40,763 INFO  L372         BasicCegarLoop]: Found error trace
[2019-10-14 21:59:40,763 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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]
[2019-10-14 21:59:40,976 WARN  L499      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:40,977 INFO  L410      AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-10-14 21:59:40,977 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-10-14 21:59:40,978 INFO  L82        PathProgramCache]: Analyzing trace with hash -777562786, now seen corresponding path program 1 times
[2019-10-14 21:59:40,978 INFO  L157   tionRefinementEngine]: Executing refinement strategy CAMEL
[2019-10-14 21:59:40,978 INFO  L342   tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092826562]
[2019-10-14 21:59:40,978 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:40,979 INFO  L116   rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY
[2019-10-14 21:59:40,979 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-10-14 21:59:41,038 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:41,138 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:41,173 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:41,240 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:42,717 INFO  L134       CoverageAnalysis]: Checked inductivity of 223 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2019-10-14 21:59:42,717 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092826562]
[2019-10-14 21:59:42,717 INFO  L342   tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145820725]
[2019-10-14 21:59:42,717 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true
[2019-10-14 21:59:42,841 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-10-14 21:59:42,843 INFO  L256         TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 7 conjunts are in the unsatisfiable core
[2019-10-14 21:59:42,852 INFO  L279         TraceCheckSpWp]: Computing forward predicates...
[2019-10-14 21:59:42,972 INFO  L134       CoverageAnalysis]: Checked inductivity of 223 backedges. 221 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-10-14 21:59:42,973 INFO  L223   tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2019-10-14 21:59:42,973 INFO  L236   tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 18
[2019-10-14 21:59:42,973 INFO  L342   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000212092]
[2019-10-14 21:59:42,974 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 18 states
[2019-10-14 21:59:42,974 INFO  L137   tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2019-10-14 21:59:42,974 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2019-10-14 21:59:42,975 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306
[2019-10-14 21:59:42,975 INFO  L87              Difference]: Start difference. First operand 12542 states and 16071 transitions. Second operand 18 states.