/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c
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This is Ultimate 0.1.25-177f698
[2020-08-21 21:21:21,979 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-08-21 21:21:21,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 21:21:22,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 21:21:22,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 21:21:22,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 21:21:22,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-21 21:21:22,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-21 21:21:22,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-21 21:21:22,020 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-21 21:21:22,021 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-08-21 21:21:22,022 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-21 21:21:22,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 21:21:22,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 21:21:22,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 21:21:22,027 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 21:21:22,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 21:21:22,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 21:21:22,031 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 21:21:22,034 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 21:21:22,036 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 21:21:22,037 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 21:21:22,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 21:21:22,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 21:21:22,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 21:21:22,043 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 21:21:22,044 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 21:21:22,045 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 21:21:22,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 21:21:22,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 21:21:22,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 21:21:22,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 21:21:22,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 21:21:22,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 21:21:22,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 21:21:22,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-21 21:21:22,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-21 21:21:22,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-21 21:21:22,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-21 21:21:22,054 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-21 21:21:22,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 21:21:22,056 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-21 21:21:22,097 INFO L113 SettingsManager]: Loading preferences was successful
[2020-08-21 21:21:22,103 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 21:21:22,105 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 21:21:22,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-08-21 21:21:22,106 INFO L138 SettingsManager]: * Use SBE=true
[2020-08-21 21:21:22,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 21:21:22,106 INFO L138 SettingsManager]: * sizeof long=4
[2020-08-21 21:21:22,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-08-21 21:21:22,106 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-08-21 21:21:22,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-08-21 21:21:22,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 21:21:22,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 21:21:22,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 21:21:22,107 INFO L138 SettingsManager]: * sizeof long double=12
[2020-08-21 21:21:22,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-08-21 21:21:22,108 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-08-21 21:21:22,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-08-21 21:21:22,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 21:21:22,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-08-21 21:21:22,108 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-08-21 21:21:22,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-08-21 21:21:22,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 21:21:22,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 21:21:22,111 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 21:21:22,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 21:21:22,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-08-21 21:21:22,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 21:21:22,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 21:21:22,112 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-08-21 21:21:22,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;
[2020-08-21 21:21:22,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 21:21:22,442 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 21:21:22,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 21:21:22,448 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-08-21 21:21:22,448 INFO L275 PluginConnector]: CDTParser initialized
[2020-08-21 21:21:22,449 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c
[2020-08-21 21:21:22,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/249da708a/5c7b82a428e14c07a95dab6b6dcc01f1/FLAG8297bdf21
[2020-08-21 21:21:22,995 INFO L306 CDTParser]: Found 1 translation units.
[2020-08-21 21:21:22,995 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-2.c
[2020-08-21 21:21:23,003 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/249da708a/5c7b82a428e14c07a95dab6b6dcc01f1/FLAG8297bdf21
[2020-08-21 21:21:23,375 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/249da708a/5c7b82a428e14c07a95dab6b6dcc01f1
[2020-08-21 21:21:23,383 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 21:21:23,385 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 21:21:23,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 21:21:23,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 21:21:23,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 21:21:23,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:21:23" (1/1) ...
[2020-08-21 21:21:23,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f88baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23, skipping insertion in model container
[2020-08-21 21:21:23,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:21:23" (1/1) ...
[2020-08-21 21:21:23,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-08-21 21:21:23,422 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-08-21 21:21:23,601 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-08-21 21:21:23,606 INFO L203 MainTranslator]: Completed pre-run
[2020-08-21 21:21:23,620 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-08-21 21:21:23,632 INFO L208 MainTranslator]: Completed translation
[2020-08-21 21:21:23,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23 WrapperNode
[2020-08-21 21:21:23,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 21:21:23,634 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 21:21:23,634 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 21:21:23,634 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 21:21:23,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23" (1/1) ...
[2020-08-21 21:21:23,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23" (1/1) ...
[2020-08-21 21:21:23,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23" (1/1) ...
[2020-08-21 21:21:23,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23" (1/1) ...
[2020-08-21 21:21:23,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23" (1/1) ...
[2020-08-21 21:21:23,733 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23" (1/1) ...
[2020-08-21 21:21:23,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23" (1/1) ...
[2020-08-21 21:21:23,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 21:21:23,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 21:21:23,736 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 21:21:23,737 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-08-21 21:21:23,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/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
[2020-08-21 21:21:23,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 21:21:23,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 21:21:23,804 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1
[2020-08-21 21:21:23,804 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2
[2020-08-21 21:21:23,804 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 21:21:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-21 21:21:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 21:21:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1
[2020-08-21 21:21:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2
[2020-08-21 21:21:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-08-21 21:21:23,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 21:21:23,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 21:21:24,010 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 21:21:24,010 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-21 21:21:24,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:21:24 BoogieIcfgContainer
[2020-08-21 21:21:24,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 21:21:24,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 21:21:24,017 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 21:21:24,021 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-08-21 21:21:24,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:21:23" (1/3) ...
[2020-08-21 21:21:24,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c96f36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:21:24, skipping insertion in model container
[2020-08-21 21:21:24,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:23" (2/3) ...
[2020-08-21 21:21:24,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c96f36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:21:24, skipping insertion in model container
[2020-08-21 21:21:24,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:21:24" (3/3) ...
[2020-08-21 21:21:24,025 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-2.c
[2020-08-21 21:21:24,037 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 21:21:24,048 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-21 21:21:24,073 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-21 21:21:24,109 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-08-21 21:21:24,110 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-08-21 21:21:24,110 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 21:21:24,110 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 21:21:24,110 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 21:21:24,111 INFO L380 AbstractCegarLoop]: Difference is false
[2020-08-21 21:21:24,111 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 21:21:24,111 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 21:21:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states.
[2020-08-21 21:21:24,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-08-21 21:21:24,146 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:24,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:24,148 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:24,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:24,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times
[2020-08-21 21:21:24,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:24,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932208191]
[2020-08-21 21:21:24,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:24,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 21:21:24,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932208191]
[2020-08-21 21:21:24,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 21:21:24,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 21:21:24,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197254483]
[2020-08-21 21:21:24,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 21:21:24,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:24,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 21:21:24,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 21:21:24,445 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states.
[2020-08-21 21:21:24,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:24,570 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions.
[2020-08-21 21:21:24,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-08-21 21:21:24,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-08-21 21:21:24,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:24,585 INFO L225 Difference]: With dead ends: 44
[2020-08-21 21:21:24,585 INFO L226 Difference]: Without dead ends: 30
[2020-08-21 21:21:24,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 21:21:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-08-21 21:21:24,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-08-21 21:21:24,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-08-21 21:21:24,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions.
[2020-08-21 21:21:24,643 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13
[2020-08-21 21:21:24,643 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:24,643 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions.
[2020-08-21 21:21:24,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 21:21:24,644 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions.
[2020-08-21 21:21:24,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-08-21 21:21:24,645 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:24,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:24,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 21:21:24,646 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:24,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:24,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times
[2020-08-21 21:21:24,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:24,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615831593]
[2020-08-21 21:21:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 21:21:24,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615831593]
[2020-08-21 21:21:24,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 21:21:24,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 21:21:24,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147223069]
[2020-08-21 21:21:24,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 21:21:24,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 21:21:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 21:21:24,719 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states.
[2020-08-21 21:21:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:24,790 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions.
[2020-08-21 21:21:24,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-08-21 21:21:24,791 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14
[2020-08-21 21:21:24,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:24,793 INFO L225 Difference]: With dead ends: 36
[2020-08-21 21:21:24,793 INFO L226 Difference]: Without dead ends: 32
[2020-08-21 21:21:24,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 21:21:24,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states.
[2020-08-21 21:21:24,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30.
[2020-08-21 21:21:24,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-08-21 21:21:24,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions.
[2020-08-21 21:21:24,806 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14
[2020-08-21 21:21:24,806 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:24,806 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions.
[2020-08-21 21:21:24,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 21:21:24,807 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions.
[2020-08-21 21:21:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27
[2020-08-21 21:21:24,808 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:24,809 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:24,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 21:21:24,809 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:24,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:24,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times
[2020-08-21 21:21:24,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:24,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891983795]
[2020-08-21 21:21:24,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:24,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 21:21:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-08-21 21:21:24,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891983795]
[2020-08-21 21:21:24,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:24,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-08-21 21:21:24,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088741182]
[2020-08-21 21:21:24,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-21 21:21:24,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:24,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-21 21:21:24,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42
[2020-08-21 21:21:24,976 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states.
[2020-08-21 21:21:25,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:25,065 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions.
[2020-08-21 21:21:25,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-08-21 21:21:25,066 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26
[2020-08-21 21:21:25,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:25,068 INFO L225 Difference]: With dead ends: 58
[2020-08-21 21:21:25,068 INFO L226 Difference]: Without dead ends: 34
[2020-08-21 21:21:25,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56
[2020-08-21 21:21:25,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-08-21 21:21:25,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32.
[2020-08-21 21:21:25,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-08-21 21:21:25,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions.
[2020-08-21 21:21:25,080 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26
[2020-08-21 21:21:25,081 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:25,081 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions.
[2020-08-21 21:21:25,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-21 21:21:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions.
[2020-08-21 21:21:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-08-21 21:21:25,083 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:25,084 INFO L422 BasicCegarLoop]: trace histogram [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]
[2020-08-21 21:21:25,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 21:21:25,084 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times
[2020-08-21 21:21:25,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:25,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66991781]
[2020-08-21 21:21:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-08-21 21:21:25,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66991781]
[2020-08-21 21:21:25,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:25,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-08-21 21:21:25,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414944314]
[2020-08-21 21:21:25,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-21 21:21:25,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:25,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-21 21:21:25,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-08-21 21:21:25,195 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states.
[2020-08-21 21:21:25,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:25,399 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions.
[2020-08-21 21:21:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-08-21 21:21:25,400 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27
[2020-08-21 21:21:25,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:25,404 INFO L225 Difference]: With dead ends: 54
[2020-08-21 21:21:25,404 INFO L226 Difference]: Without dead ends: 50
[2020-08-21 21:21:25,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-08-21 21:21:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2020-08-21 21:21:25,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48.
[2020-08-21 21:21:25,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2020-08-21 21:21:25,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions.
[2020-08-21 21:21:25,420 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27
[2020-08-21 21:21:25,420 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:25,421 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions.
[2020-08-21 21:21:25,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-21 21:21:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions.
[2020-08-21 21:21:25,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40
[2020-08-21 21:21:25,423 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:25,423 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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]
[2020-08-21 21:21:25,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 21:21:25,424 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:25,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:25,425 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times
[2020-08-21 21:21:25,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:25,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913749678]
[2020-08-21 21:21:25,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9
[2020-08-21 21:21:25,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2020-08-21 21:21:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-08-21 21:21:25,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913749678]
[2020-08-21 21:21:25,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:25,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-08-21 21:21:25,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507410960]
[2020-08-21 21:21:25,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-21 21:21:25,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:25,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-21 21:21:25,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-08-21 21:21:25,553 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states.
[2020-08-21 21:21:25,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:25,631 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions.
[2020-08-21 21:21:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-08-21 21:21:25,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39
[2020-08-21 21:21:25,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:25,633 INFO L225 Difference]: With dead ends: 94
[2020-08-21 21:21:25,634 INFO L226 Difference]: Without dead ends: 52
[2020-08-21 21:21:25,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-08-21 21:21:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2020-08-21 21:21:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52.
[2020-08-21 21:21:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-08-21 21:21:25,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions.
[2020-08-21 21:21:25,648 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39
[2020-08-21 21:21:25,648 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:25,648 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions.
[2020-08-21 21:21:25,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-21 21:21:25,648 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions.
[2020-08-21 21:21:25,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41
[2020-08-21 21:21:25,650 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:25,651 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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]
[2020-08-21 21:21:25,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-21 21:21:25,651 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:25,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times
[2020-08-21 21:21:25,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:25,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29021353]
[2020-08-21 21:21:25,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:25,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:25,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:25,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-08-21 21:21:25,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29021353]
[2020-08-21 21:21:25,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:25,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-08-21 21:21:25,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114528516]
[2020-08-21 21:21:25,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-21 21:21:25,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:25,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-21 21:21:25,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-21 21:21:25,854 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states.
[2020-08-21 21:21:25,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:25,988 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions.
[2020-08-21 21:21:25,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-08-21 21:21:25,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40
[2020-08-21 21:21:25,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:25,991 INFO L225 Difference]: With dead ends: 103
[2020-08-21 21:21:25,991 INFO L226 Difference]: Without dead ends: 57
[2020-08-21 21:21:25,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2020-08-21 21:21:25,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states.
[2020-08-21 21:21:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54.
[2020-08-21 21:21:26,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states.
[2020-08-21 21:21:26,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions.
[2020-08-21 21:21:26,008 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40
[2020-08-21 21:21:26,008 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:26,008 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions.
[2020-08-21 21:21:26,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-21 21:21:26,009 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions.
[2020-08-21 21:21:26,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-08-21 21:21:26,011 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:26,012 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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]
[2020-08-21 21:21:26,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-21 21:21:26,012 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times
[2020-08-21 21:21:26,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:26,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761358184]
[2020-08-21 21:21:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:26,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-08-21 21:21:26,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761358184]
[2020-08-21 21:21:26,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:26,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-08-21 21:21:26,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083625503]
[2020-08-21 21:21:26,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-21 21:21:26,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:26,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-21 21:21:26,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-21 21:21:26,230 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states.
[2020-08-21 21:21:26,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:26,442 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions.
[2020-08-21 21:21:26,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-08-21 21:21:26,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41
[2020-08-21 21:21:26,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:26,446 INFO L225 Difference]: With dead ends: 86
[2020-08-21 21:21:26,446 INFO L226 Difference]: Without dead ends: 82
[2020-08-21 21:21:26,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2020-08-21 21:21:26,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states.
[2020-08-21 21:21:26,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79.
[2020-08-21 21:21:26,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states.
[2020-08-21 21:21:26,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions.
[2020-08-21 21:21:26,464 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41
[2020-08-21 21:21:26,465 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:26,465 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions.
[2020-08-21 21:21:26,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-21 21:21:26,465 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions.
[2020-08-21 21:21:26,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55
[2020-08-21 21:21:26,468 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:26,468 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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]
[2020-08-21 21:21:26,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-08-21 21:21:26,472 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times
[2020-08-21 21:21:26,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:26,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829168220]
[2020-08-21 21:21:26,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:26,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:26,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:26,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36
[2020-08-21 21:21:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked.
[2020-08-21 21:21:26,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829168220]
[2020-08-21 21:21:26,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:26,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8
[2020-08-21 21:21:26,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85486154]
[2020-08-21 21:21:26,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-08-21 21:21:26,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:26,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-08-21 21:21:26,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-08-21 21:21:26,683 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states.
[2020-08-21 21:21:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:26,806 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions.
[2020-08-21 21:21:26,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states.
[2020-08-21 21:21:26,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54
[2020-08-21 21:21:26,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:26,809 INFO L225 Difference]: With dead ends: 167
[2020-08-21 21:21:26,809 INFO L226 Difference]: Without dead ends: 94
[2020-08-21 21:21:26,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2020-08-21 21:21:26,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states.
[2020-08-21 21:21:26,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88.
[2020-08-21 21:21:26,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states.
[2020-08-21 21:21:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions.
[2020-08-21 21:21:26,829 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54
[2020-08-21 21:21:26,830 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:26,830 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions.
[2020-08-21 21:21:26,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-08-21 21:21:26,830 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions.
[2020-08-21 21:21:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56
[2020-08-21 21:21:26,832 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:26,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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]
[2020-08-21 21:21:26,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-08-21 21:21:26,833 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:26,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:26,834 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times
[2020-08-21 21:21:26,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:26,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362109967]
[2020-08-21 21:21:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:26,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:26,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:26,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,014 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2020-08-21 21:21:27,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362109967]
[2020-08-21 21:21:27,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:27,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-08-21 21:21:27,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668420845]
[2020-08-21 21:21:27,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-08-21 21:21:27,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:27,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-08-21 21:21:27,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90
[2020-08-21 21:21:27,017 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states.
[2020-08-21 21:21:27,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:27,247 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions.
[2020-08-21 21:21:27,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2020-08-21 21:21:27,248 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55
[2020-08-21 21:21:27,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:27,250 INFO L225 Difference]: With dead ends: 188
[2020-08-21 21:21:27,251 INFO L226 Difference]: Without dead ends: 109
[2020-08-21 21:21:27,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2020-08-21 21:21:27,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states.
[2020-08-21 21:21:27,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100.
[2020-08-21 21:21:27,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states.
[2020-08-21 21:21:27,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions.
[2020-08-21 21:21:27,269 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55
[2020-08-21 21:21:27,270 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:27,270 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions.
[2020-08-21 21:21:27,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-08-21 21:21:27,270 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions.
[2020-08-21 21:21:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83
[2020-08-21 21:21:27,272 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:27,273 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:27,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-08-21 21:21:27,273 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:27,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:27,274 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times
[2020-08-21 21:21:27,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:27,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601824222]
[2020-08-21 21:21:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:27,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:27,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:27,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:27,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:27,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:27,564 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked.
[2020-08-21 21:21:27,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601824222]
[2020-08-21 21:21:27,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:27,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-08-21 21:21:27,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691352962]
[2020-08-21 21:21:27,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-08-21 21:21:27,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:27,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-08-21 21:21:27,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132
[2020-08-21 21:21:27,567 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states.
[2020-08-21 21:21:27,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:27,951 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions.
[2020-08-21 21:21:27,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states.
[2020-08-21 21:21:27,951 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82
[2020-08-21 21:21:27,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:27,954 INFO L225 Difference]: With dead ends: 199
[2020-08-21 21:21:27,954 INFO L226 Difference]: Without dead ends: 86
[2020-08-21 21:21:27,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420
[2020-08-21 21:21:27,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states.
[2020-08-21 21:21:27,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71.
[2020-08-21 21:21:27,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states.
[2020-08-21 21:21:27,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions.
[2020-08-21 21:21:27,977 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82
[2020-08-21 21:21:27,978 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:27,978 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions.
[2020-08-21 21:21:27,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-08-21 21:21:27,978 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions.
[2020-08-21 21:21:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111
[2020-08-21 21:21:27,981 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:27,981 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:27,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-08-21 21:21:27,982 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:27,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:27,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times
[2020-08-21 21:21:27,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:27,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358518224]
[2020-08-21 21:21:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:28,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:28,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51
[2020-08-21 21:21:28,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,266 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked.
[2020-08-21 21:21:28,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358518224]
[2020-08-21 21:21:28,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:28,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10
[2020-08-21 21:21:28,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238732366]
[2020-08-21 21:21:28,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-08-21 21:21:28,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:28,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-08-21 21:21:28,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90
[2020-08-21 21:21:28,269 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states.
[2020-08-21 21:21:28,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:28,444 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions.
[2020-08-21 21:21:28,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-08-21 21:21:28,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110
[2020-08-21 21:21:28,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:28,446 INFO L225 Difference]: With dead ends: 142
[2020-08-21 21:21:28,447 INFO L226 Difference]: Without dead ends: 78
[2020-08-21 21:21:28,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182
[2020-08-21 21:21:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states.
[2020-08-21 21:21:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78.
[2020-08-21 21:21:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states.
[2020-08-21 21:21:28,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions.
[2020-08-21 21:21:28,473 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110
[2020-08-21 21:21:28,473 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:28,474 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions.
[2020-08-21 21:21:28,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-08-21 21:21:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions.
[2020-08-21 21:21:28,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193
[2020-08-21 21:21:28,478 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:28,479 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:28,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-08-21 21:21:28,479 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:28,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times
[2020-08-21 21:21:28,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:28,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160391185]
[2020-08-21 21:21:28,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:28,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:28,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:28,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:28,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:28,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24
[2020-08-21 21:21:28,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92
[2020-08-21 21:21:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:28,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:29,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24
[2020-08-21 21:21:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 133 proven. 373 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked.
[2020-08-21 21:21:29,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160391185]
[2020-08-21 21:21:29,138 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:29,139 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15
[2020-08-21 21:21:29,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594014578]
[2020-08-21 21:21:29,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-08-21 21:21:29,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:29,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-08-21 21:21:29,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210
[2020-08-21 21:21:29,141 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 15 states.
[2020-08-21 21:21:29,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:29,731 INFO L93 Difference]: Finished difference Result 184 states and 282 transitions.
[2020-08-21 21:21:29,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states.
[2020-08-21 21:21:29,731 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 192
[2020-08-21 21:21:29,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:29,733 INFO L225 Difference]: With dead ends: 184
[2020-08-21 21:21:29,734 INFO L226 Difference]: Without dead ends: 111
[2020-08-21 21:21:29,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812
[2020-08-21 21:21:29,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states.
[2020-08-21 21:21:29,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 99.
[2020-08-21 21:21:29,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states.
[2020-08-21 21:21:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions.
[2020-08-21 21:21:29,746 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 192
[2020-08-21 21:21:29,746 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:29,746 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions.
[2020-08-21 21:21:29,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-08-21 21:21:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions.
[2020-08-21 21:21:29,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137
[2020-08-21 21:21:29,748 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:29,749 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:29,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-08-21 21:21:29,749 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:29,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:29,749 INFO L82 PathProgramCache]: Analyzing trace with hash -2102107778, now seen corresponding path program 1 times
[2020-08-21 21:21:29,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:29,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554309043]
[2020-08-21 21:21:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:29,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 21:21:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:29,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91
[2020-08-21 21:21:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 109 proven. 85 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked.
[2020-08-21 21:21:29,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554309043]
[2020-08-21 21:21:29,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:29,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11
[2020-08-21 21:21:29,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496152454]
[2020-08-21 21:21:30,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-08-21 21:21:30,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-08-21 21:21:30,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110
[2020-08-21 21:21:30,001 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states.
[2020-08-21 21:21:30,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:30,256 INFO L93 Difference]: Finished difference Result 188 states and 266 transitions.
[2020-08-21 21:21:30,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states.
[2020-08-21 21:21:30,257 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 136
[2020-08-21 21:21:30,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:30,260 INFO L225 Difference]: With dead ends: 188
[2020-08-21 21:21:30,260 INFO L226 Difference]: Without dead ends: 101
[2020-08-21 21:21:30,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272
[2020-08-21 21:21:30,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states.
[2020-08-21 21:21:30,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98.
[2020-08-21 21:21:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states.
[2020-08-21 21:21:30,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 130 transitions.
[2020-08-21 21:21:30,295 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 130 transitions. Word has length 136
[2020-08-21 21:21:30,295 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:30,296 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 130 transitions.
[2020-08-21 21:21:30,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-08-21 21:21:30,296 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 130 transitions.
[2020-08-21 21:21:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2020-08-21 21:21:30,300 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:30,300 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 11, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:30,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-08-21 21:21:30,301 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:30,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:30,301 INFO L82 PathProgramCache]: Analyzing trace with hash 677703633, now seen corresponding path program 2 times
[2020-08-21 21:21:30,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:30,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860174111]
[2020-08-21 21:21:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:30,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:30,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:30,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:30,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 21:21:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132
[2020-08-21 21:21:30,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:30,684 INFO L134 CoverageAnalysis]: Checked inductivity of 787 backedges. 138 proven. 250 refuted. 0 times theorem prover too weak. 399 trivial. 0 not checked.
[2020-08-21 21:21:30,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860174111]
[2020-08-21 21:21:30,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:30,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-08-21 21:21:30,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366559751]
[2020-08-21 21:21:30,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-08-21 21:21:30,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:30,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-08-21 21:21:30,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182
[2020-08-21 21:21:30,687 INFO L87 Difference]: Start difference. First operand 98 states and 130 transitions. Second operand 14 states.
[2020-08-21 21:21:31,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:31,268 INFO L93 Difference]: Finished difference Result 217 states and 326 transitions.
[2020-08-21 21:21:31,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states.
[2020-08-21 21:21:31,268 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 177
[2020-08-21 21:21:31,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:31,270 INFO L225 Difference]: With dead ends: 217
[2020-08-21 21:21:31,271 INFO L226 Difference]: Without dead ends: 124
[2020-08-21 21:21:31,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756
[2020-08-21 21:21:31,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states.
[2020-08-21 21:21:31,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107.
[2020-08-21 21:21:31,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states.
[2020-08-21 21:21:31,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 144 transitions.
[2020-08-21 21:21:31,288 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 144 transitions. Word has length 177
[2020-08-21 21:21:31,288 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:31,288 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 144 transitions.
[2020-08-21 21:21:31,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-08-21 21:21:31,288 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 144 transitions.
[2020-08-21 21:21:31,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151
[2020-08-21 21:21:31,290 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:31,291 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:31,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2020-08-21 21:21:31,291 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:31,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:31,292 INFO L82 PathProgramCache]: Analyzing trace with hash -529934979, now seen corresponding path program 3 times
[2020-08-21 21:21:31,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:31,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497388156]
[2020-08-21 21:21:31,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 21:21:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5
[2020-08-21 21:21:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-08-21 21:21:31,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:31,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64
[2020-08-21 21:21:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105
[2020-08-21 21:21:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3
[2020-08-21 21:21:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10
[2020-08-21 21:21:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23
[2020-08-21 21:21:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 21:21:31,658 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 144 proven. 139 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked.
[2020-08-21 21:21:31,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497388156]
[2020-08-21 21:21:31,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-21 21:21:31,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-08-21 21:21:31,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329755146]
[2020-08-21 21:21:31,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-08-21 21:21:31,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 21:21:31,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-08-21 21:21:31,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182
[2020-08-21 21:21:31,660 INFO L87 Difference]: Start difference. First operand 107 states and 144 transitions. Second operand 14 states.
[2020-08-21 21:21:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 21:21:32,093 INFO L93 Difference]: Finished difference Result 211 states and 302 transitions.
[2020-08-21 21:21:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states.
[2020-08-21 21:21:32,094 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 150
[2020-08-21 21:21:32,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 21:21:32,096 INFO L225 Difference]: With dead ends: 211
[2020-08-21 21:21:32,096 INFO L226 Difference]: Without dead ends: 114
[2020-08-21 21:21:32,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600
[2020-08-21 21:21:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states.
[2020-08-21 21:21:32,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111.
[2020-08-21 21:21:32,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states.
[2020-08-21 21:21:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions.
[2020-08-21 21:21:32,107 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 150
[2020-08-21 21:21:32,107 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-08-21 21:21:32,107 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions.
[2020-08-21 21:21:32,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-08-21 21:21:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions.
[2020-08-21 21:21:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2020-08-21 21:21:32,109 INFO L414 BasicCegarLoop]: Found error trace
[2020-08-21 21:21:32,110 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 21:21:32,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2020-08-21 21:21:32,110 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 21:21:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 21:21:32,111 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 4 times
[2020-08-21 21:21:32,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 21:21:32,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745399060]
[2020-08-21 21:21:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 21:21:32,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-21 21:21:32,135 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-21 21:21:32,136 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-08-21 21:21:32,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2020-08-21 21:21:32,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:21:32 BoogieIcfgContainer
[2020-08-21 21:21:32,170 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-21 21:21:32,172 INFO L168 Benchmark]: Toolchain (without parser) took 8786.85 ms. Allocated memory was 139.5 MB in the beginning and 352.3 MB in the end (delta: 212.9 MB). Free memory was 101.5 MB in the beginning and 224.5 MB in the end (delta: -123.1 MB). Peak memory consumption was 89.8 MB. Max. memory is 7.1 GB.
[2020-08-21 21:21:32,173 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-08-21 21:21:32,174 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.54 ms. Allocated memory is still 139.5 MB. Free memory was 101.3 MB in the beginning and 91.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
[2020-08-21 21:21:32,175 INFO L168 Benchmark]: Boogie Preprocessor took 101.90 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 181.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
[2020-08-21 21:21:32,175 INFO L168 Benchmark]: RCFGBuilder took 279.82 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 168.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB.
[2020-08-21 21:21:32,176 INFO L168 Benchmark]: TraceAbstraction took 8152.40 ms. Allocated memory was 202.4 MB in the beginning and 352.3 MB in the end (delta: 149.9 MB). Free memory was 168.1 MB in the beginning and 224.5 MB in the end (delta: -56.4 MB). Peak memory consumption was 93.5 MB. Max. memory is 7.1 GB.
[2020-08-21 21:21:32,179 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.27 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 247.54 ms. Allocated memory is still 139.5 MB. Free memory was 101.3 MB in the beginning and 91.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 101.90 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.2 MB in the beginning and 181.5 MB in the end (delta: -90.3 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 279.82 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 168.1 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 8152.40 ms. Allocated memory was 202.4 MB in the beginning and 352.3 MB in the end (delta: 149.9 MB). Free memory was 168.1 MB in the beginning and 224.5 MB in the end (delta: -56.4 MB). Peak memory consumption was 93.5 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L36] int x = 6;
[L37] CALL, EXPR fibo1(x)
[L8] COND FALSE !(n < 1)
[L10] COND FALSE !(n == 1)
[L13] CALL, EXPR fibo2(n-1)
[L18] COND FALSE !(n < 1)
[L20] COND FALSE !(n == 1)
[L23] CALL, EXPR fibo1(n-1)
[L8] COND FALSE !(n < 1)
[L10] COND FALSE !(n == 1)
[L13] CALL, EXPR fibo2(n-1)
[L18] COND FALSE !(n < 1)
[L20] COND FALSE !(n == 1)
[L23] CALL, EXPR fibo1(n-1)
[L8] COND FALSE !(n < 1)
[L10] COND FALSE !(n == 1)
[L13] CALL, EXPR fibo2(n-1)
[L18] COND FALSE !(n < 1)
[L20] COND TRUE n == 1
[L21] return 1;
[L13] RET, EXPR fibo2(n-1)
[L13] CALL, EXPR fibo2(n-2)
[L18] COND TRUE n < 1
[L19] return 0;
[L13] RET, EXPR fibo2(n-2)
[L13] return fibo2(n-1) + fibo2(n-2);
[L23] RET, EXPR fibo1(n-1)
[L23] CALL, EXPR fibo1(n-2)
[L8] COND FALSE !(n < 1)
[L10] COND TRUE n == 1
[L11] return 1;
[L23] RET, EXPR fibo1(n-2)
[L23] return fibo1(n-1) + fibo1(n-2);
[L13] RET, EXPR fibo2(n-1)
[L13] CALL, EXPR fibo2(n-2)
[L18] COND FALSE !(n < 1)
[L20] COND FALSE !(n == 1)
[L23] CALL, EXPR fibo1(n-1)
[L8] COND FALSE !(n < 1)
[L10] COND TRUE n == 1
[L11] return 1;
[L23] RET, EXPR fibo1(n-1)
[L23] CALL, EXPR fibo1(n-2)
[L8] COND TRUE n < 1
[L9] return 0;
[L23] RET, EXPR fibo1(n-2)
[L23] return fibo1(n-1) + fibo1(n-2);
[L13] RET, EXPR fibo2(n-2)
[L13] return fibo2(n-1) + fibo2(n-2);
[L23] RET, EXPR fibo1(n-1)
[L23] CALL, EXPR fibo1(n-2)
[L8] COND FALSE !(n < 1)
[L10] COND FALSE !(n == 1)
[L13] CALL, EXPR fibo2(n-1)
[L18] COND FALSE !(n < 1)
[L20] COND FALSE !(n == 1)
[L23] CALL, EXPR fibo1(n-1)
[L8] COND FALSE !(n < 1)
[L10] COND TRUE n == 1
[L11] return 1;
[L23] RET, EXPR fibo1(n-1)
[L23] CALL, EXPR fibo1(n-2)
[L8] COND TRUE n < 1
[L9] return 0;
[L23] RET, EXPR fibo1(n-2)
[L23] return fibo1(n-1) + fibo1(n-2);
[L13] RET, EXPR fibo2(n-1)
[L13] CALL, EXPR fibo2(n-2)
[L18] COND FALSE !(n < 1)
[L20] COND TRUE n == 1
[L21] return 1;
[L13] RET, EXPR fibo2(n-2)
[L13] return fibo2(n-1) + fibo2(n-2);
[L23] RET, EXPR fibo1(n-2)
[L23] return fibo1(n-1) + fibo1(n-2);
[L13] RET, EXPR fibo2(n-1)
[L13] CALL, EXPR fibo2(n-2)
[L18] COND FALSE !(n < 1)
[L20] COND FALSE !(n == 1)
[L23] CALL, EXPR fibo1(n-1)
[L8] COND FALSE !(n < 1)
[L10] COND FALSE !(n == 1)
[L13] CALL, EXPR fibo2(n-1)
[L18] COND FALSE !(n < 1)
[L20] COND FALSE !(n == 1)
[L23] CALL, EXPR fibo1(n-1)
[L8] COND FALSE !(n < 1)
[L10] COND TRUE n == 1
[L11] return 1;
[L23] RET, EXPR fibo1(n-1)
[L23] CALL, EXPR fibo1(n-2)
[L8] COND TRUE n < 1
[L9] return 0;
[L23] RET, EXPR fibo1(n-2)
[L23] return fibo1(n-1) + fibo1(n-2);
[L13] RET, EXPR fibo2(n-1)
[L13] CALL, EXPR fibo2(n-2)
[L18] COND FALSE !(n < 1)
[L20] COND TRUE n == 1
[L21] return 1;
[L13] RET, EXPR fibo2(n-2)
[L13] return fibo2(n-1) + fibo2(n-2);
[L23] RET, EXPR fibo1(n-1)
[L23] CALL, EXPR fibo1(n-2)
[L8] COND FALSE !(n < 1)
[L10] COND FALSE !(n == 1)
[L13] CALL, EXPR fibo2(n-1)
[L18] COND FALSE !(n < 1)
[L20] COND TRUE n == 1
[L21] return 1;
[L13] RET, EXPR fibo2(n-1)
[L13] CALL, EXPR fibo2(n-2)
[L18] COND TRUE n < 1
[L19] return 0;
[L13] RET, EXPR fibo2(n-2)
[L13] return fibo2(n-1) + fibo2(n-2);
[L23] RET, EXPR fibo1(n-2)
[L23] return fibo1(n-1) + fibo1(n-2);
[L13] RET, EXPR fibo2(n-2)
[L13] return fibo2(n-1) + fibo2(n-2);
[L37] RET, EXPR fibo1(x)
[L37] int result = fibo1(x);
[L38] COND TRUE result == 8
[L39] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.0s, OverallIterations: 16, TraceHistogramMax: 17, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 460 SDtfs, 472 SDslu, 2192 SDs, 0 SdLazy, 2657 SolverSat, 328 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 569 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 77 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 1333 NumberOfCodeBlocks, 1333 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 1141 ConstructedInterpolants, 0 QuantifiedInterpolants, 236129 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 15 InterpolantComputations, 2 PerfectInterpolantSequences, 2308/3324 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...