/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=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c


--------------------------------------------------------------------------------


This is Ultimate 0.1.25-177f698
[2020-08-21 22:11:00,211 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 22:11:00,214 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 22:11:00,247 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 22:11:00,248 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 22:11:00,257 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 22:11:00,260 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-21 22:11:00,264 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-21 22:11:00,267 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-21 22:11:00,270 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-21 22:11:00,271 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-21 22:11:00,272 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-21 22:11:00,272 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 22:11:00,275 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 22:11:00,278 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 22:11:00,279 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 22:11:00,281 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 22:11:00,282 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 22:11:00,284 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 22:11:00,294 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 22:11:00,296 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 22:11:00,297 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 22:11:00,299 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 22:11:00,300 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 22:11:00,315 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 22:11:00,315 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 22:11:00,316 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 22:11:00,317 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 22:11:00,317 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 22:11:00,321 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 22:11:00,321 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 22:11:00,322 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 22:11:00,323 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 22:11:00,324 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 22:11:00,327 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 22:11:00,327 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-08-21 22:11:00,328 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-21 22:11:00,333 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 22:11:00,335 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 22:11:00,375 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 22:11:00,375 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 22:11:00,379 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 22:11:00,380 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 22:11:00,380 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 22:11:00,380 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 22:11:00,380 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 22:11:00,381 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 22:11:00,381 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 22:11:00,381 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 22:11:00,382 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 22:11:00,382 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 22:11:00,383 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 22:11:00,383 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 22:11:00,383 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 22:11:00,384 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 22:11:00,384 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 22:11:00,384 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 22:11:00,384 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 22:11:00,384 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 22:11:00,385 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 22:11:00,385 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 22:11:00,385 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 22:11:00,386 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 22:11:00,386 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 22:11:00,386 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 22:11:00,386 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 22:11:00,387 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 22:11:00,387 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 22:11:00,387 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=WIDEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true;
[2020-08-21 22:11:00,733 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 22:11:00,752 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 22:11:00,756 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 22:11:00,758 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 22:11:00,758 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 22:11:00,759 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c
[2020-08-21 22:11:00,818 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fb292b4c/8add6347eb8f4c93a7b434e931a3afe6/FLAG3858c6514
[2020-08-21 22:11:01,349 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 22:11:01,349 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_14.cil.c
[2020-08-21 22:11:01,363 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fb292b4c/8add6347eb8f4c93a7b434e931a3afe6/FLAG3858c6514
[2020-08-21 22:11:01,685 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fb292b4c/8add6347eb8f4c93a7b434e931a3afe6
[2020-08-21 22:11:01,693 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 22:11:01,695 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 22:11:01,699 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 22:11:01,699 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 22:11:01,703 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 22:11:01,704 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:11:01" (1/1) ...
[2020-08-21 22:11:01,707 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@131dba71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:01, skipping insertion in model container
[2020-08-21 22:11:01,707 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:11:01" (1/1) ...
[2020-08-21 22:11:01,715 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 22:11:01,757 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 22:11:02,031 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 22:11:02,040 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 22:11:02,188 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 22:11:02,203 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 22:11:02,204 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02 WrapperNode
[2020-08-21 22:11:02,204 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 22:11:02,205 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 22:11:02,205 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 22:11:02,205 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 22:11:02,220 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02" (1/1) ...
[2020-08-21 22:11:02,220 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02" (1/1) ...
[2020-08-21 22:11:02,230 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02" (1/1) ...
[2020-08-21 22:11:02,230 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02" (1/1) ...
[2020-08-21 22:11:02,243 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02" (1/1) ...
[2020-08-21 22:11:02,258 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02" (1/1) ...
[2020-08-21 22:11:02,262 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02" (1/1) ...
[2020-08-21 22:11:02,267 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 22:11:02,268 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 22:11:02,268 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 22:11:02,268 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 22:11:02,269 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02" (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 22:11:02,341 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 22:11:02,341 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 22:11:02,342 INFO  L138     BoogieDeclarations]: Found implementation of procedure ssl3_accept
[2020-08-21 22:11:02,342 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 22:11:02,342 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 22:11:02,343 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-21 22:11:02,343 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-21 22:11:02,343 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long
[2020-08-21 22:11:02,343 INFO  L130     BoogieDeclarations]: Found specification of procedure ssl3_accept
[2020-08-21 22:11:02,343 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 22:11:02,343 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 22:11:02,343 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 22:11:02,545 WARN  L779   $ProcedureCfgBuilder]: Label in the middle of a codeblock.
[2020-08-21 22:11:03,113 INFO  L732   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false;
[2020-08-21 22:11:03,114 INFO  L732   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false;
[2020-08-21 22:11:03,126 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 22:11:03,127 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-08-21 22:11:03,133 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:11:03 BoogieIcfgContainer
[2020-08-21 22:11:03,133 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 22:11:03,135 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 22:11:03,135 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 22:11:03,138 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 22:11:03,139 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:11:01" (1/3) ...
[2020-08-21 22:11:03,140 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ea554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:11:03, skipping insertion in model container
[2020-08-21 22:11:03,140 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:11:02" (2/3) ...
[2020-08-21 22:11:03,141 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ea554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:11:03, skipping insertion in model container
[2020-08-21 22:11:03,141 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:11:03" (3/3) ...
[2020-08-21 22:11:03,143 INFO  L109   eAbstractionObserver]: Analyzing ICFG s3_srvr_14.cil.c
[2020-08-21 22:11:03,155 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 22:11:03,164 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-21 22:11:03,180 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-21 22:11:03,209 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 22:11:03,210 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 22:11:03,210 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 22:11:03,211 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 22:11:03,211 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 22:11:03,211 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 22:11:03,211 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 22:11:03,211 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 22:11:03,236 INFO  L276                IsEmpty]: Start isEmpty. Operand 159 states.
[2020-08-21 22:11:03,244 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-08-21 22:11:03,245 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:03,246 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:03,247 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:03,253 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:03,254 INFO  L82        PathProgramCache]: Analyzing trace with hash -2138433857, now seen corresponding path program 1 times
[2020-08-21 22:11:03,263 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:03,263 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073397505]
[2020-08-21 22:11:03,264 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:03,420 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:03,548 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:03,549 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:03,571 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 22:11:03,574 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073397505]
[2020-08-21 22:11:03,577 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:03,577 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 22:11:03,578 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797234927]
[2020-08-21 22:11:03,586 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 22:11:03,587 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:03,602 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 22:11:03,603 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 22:11:03,605 INFO  L87              Difference]: Start difference. First operand 159 states. Second operand 5 states.
[2020-08-21 22:11:04,052 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:04,053 INFO  L93              Difference]: Finished difference Result 375 states and 646 transitions.
[2020-08-21 22:11:04,053 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 22:11:04,055 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 28
[2020-08-21 22:11:04,055 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:04,071 INFO  L225             Difference]: With dead ends: 375
[2020-08-21 22:11:04,071 INFO  L226             Difference]: Without dead ends: 194
[2020-08-21 22:11:04,077 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 22:11:04,099 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 194 states.
[2020-08-21 22:11:04,136 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188.
[2020-08-21 22:11:04,137 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 188 states.
[2020-08-21 22:11:04,140 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 279 transitions.
[2020-08-21 22:11:04,141 INFO  L78                 Accepts]: Start accepts. Automaton has 188 states and 279 transitions. Word has length 28
[2020-08-21 22:11:04,142 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:04,142 INFO  L479      AbstractCegarLoop]: Abstraction has 188 states and 279 transitions.
[2020-08-21 22:11:04,142 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 22:11:04,142 INFO  L276                IsEmpty]: Start isEmpty. Operand 188 states and 279 transitions.
[2020-08-21 22:11:04,144 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-08-21 22:11:04,144 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:04,144 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:04,145 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 22:11:04,145 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:04,145 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:04,145 INFO  L82        PathProgramCache]: Analyzing trace with hash 533516532, now seen corresponding path program 1 times
[2020-08-21 22:11:04,146 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:04,146 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131934469]
[2020-08-21 22:11:04,146 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:04,177 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:04,256 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:04,257 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:04,260 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 22:11:04,265 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131934469]
[2020-08-21 22:11:04,265 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:04,265 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 22:11:04,266 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633520805]
[2020-08-21 22:11:04,267 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 22:11:04,268 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:04,268 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 22:11:04,269 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 22:11:04,269 INFO  L87              Difference]: Start difference. First operand 188 states and 279 transitions. Second operand 5 states.
[2020-08-21 22:11:04,629 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:04,629 INFO  L93              Difference]: Finished difference Result 448 states and 678 transitions.
[2020-08-21 22:11:04,629 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-21 22:11:04,630 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 31
[2020-08-21 22:11:04,630 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:04,633 INFO  L225             Difference]: With dead ends: 448
[2020-08-21 22:11:04,633 INFO  L226             Difference]: Without dead ends: 260
[2020-08-21 22:11:04,636 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 22:11:04,637 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 260 states.
[2020-08-21 22:11:04,658 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 245.
[2020-08-21 22:11:04,658 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 245 states.
[2020-08-21 22:11:04,660 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 372 transitions.
[2020-08-21 22:11:04,660 INFO  L78                 Accepts]: Start accepts. Automaton has 245 states and 372 transitions. Word has length 31
[2020-08-21 22:11:04,660 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:04,661 INFO  L479      AbstractCegarLoop]: Abstraction has 245 states and 372 transitions.
[2020-08-21 22:11:04,661 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 22:11:04,661 INFO  L276                IsEmpty]: Start isEmpty. Operand 245 states and 372 transitions.
[2020-08-21 22:11:04,662 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2020-08-21 22:11:04,662 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:04,663 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:04,663 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 22:11:04,663 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:04,664 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:04,664 INFO  L82        PathProgramCache]: Analyzing trace with hash 522773526, now seen corresponding path program 1 times
[2020-08-21 22:11:04,664 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:04,664 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410940002]
[2020-08-21 22:11:04,665 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:04,706 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:04,772 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:04,773 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:04,780 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 22:11:04,781 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410940002]
[2020-08-21 22:11:04,781 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:04,782 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:04,782 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357718610]
[2020-08-21 22:11:04,783 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:04,783 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:04,784 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:04,785 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:04,786 INFO  L87              Difference]: Start difference. First operand 245 states and 372 transitions. Second operand 3 states.
[2020-08-21 22:11:04,828 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:04,834 INFO  L93              Difference]: Finished difference Result 698 states and 1061 transitions.
[2020-08-21 22:11:04,836 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:04,836 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 32
[2020-08-21 22:11:04,837 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:04,841 INFO  L225             Difference]: With dead ends: 698
[2020-08-21 22:11:04,841 INFO  L226             Difference]: Without dead ends: 466
[2020-08-21 22:11:04,846 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:04,848 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 466 states.
[2020-08-21 22:11:04,905 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 464.
[2020-08-21 22:11:04,906 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 464 states.
[2020-08-21 22:11:04,909 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 701 transitions.
[2020-08-21 22:11:04,909 INFO  L78                 Accepts]: Start accepts. Automaton has 464 states and 701 transitions. Word has length 32
[2020-08-21 22:11:04,909 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:04,910 INFO  L479      AbstractCegarLoop]: Abstraction has 464 states and 701 transitions.
[2020-08-21 22:11:04,910 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:04,910 INFO  L276                IsEmpty]: Start isEmpty. Operand 464 states and 701 transitions.
[2020-08-21 22:11:04,915 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-08-21 22:11:04,916 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:04,916 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:04,916 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 22:11:04,916 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:04,917 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:04,918 INFO  L82        PathProgramCache]: Analyzing trace with hash -1890290600, now seen corresponding path program 1 times
[2020-08-21 22:11:04,919 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:04,919 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159342405]
[2020-08-21 22:11:04,919 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:04,963 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:05,015 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:05,016 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:05,020 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 22:11:05,020 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159342405]
[2020-08-21 22:11:05,020 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:05,020 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-21 22:11:05,021 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098908067]
[2020-08-21 22:11:05,021 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-21 22:11:05,021 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:05,022 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-21 22:11:05,022 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-21 22:11:05,022 INFO  L87              Difference]: Start difference. First operand 464 states and 701 transitions. Second operand 6 states.
[2020-08-21 22:11:05,361 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:05,361 INFO  L93              Difference]: Finished difference Result 1155 states and 1779 transitions.
[2020-08-21 22:11:05,361 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-21 22:11:05,362 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 33
[2020-08-21 22:11:05,362 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:05,366 INFO  L225             Difference]: With dead ends: 1155
[2020-08-21 22:11:05,366 INFO  L226             Difference]: Without dead ends: 655
[2020-08-21 22:11:05,368 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72
[2020-08-21 22:11:05,369 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 655 states.
[2020-08-21 22:11:05,388 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 526.
[2020-08-21 22:11:05,389 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 526 states.
[2020-08-21 22:11:05,391 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 799 transitions.
[2020-08-21 22:11:05,392 INFO  L78                 Accepts]: Start accepts. Automaton has 526 states and 799 transitions. Word has length 33
[2020-08-21 22:11:05,392 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:05,392 INFO  L479      AbstractCegarLoop]: Abstraction has 526 states and 799 transitions.
[2020-08-21 22:11:05,392 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-21 22:11:05,392 INFO  L276                IsEmpty]: Start isEmpty. Operand 526 states and 799 transitions.
[2020-08-21 22:11:05,394 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 46
[2020-08-21 22:11:05,394 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:05,394 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:05,395 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 22:11:05,395 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:05,395 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:05,395 INFO  L82        PathProgramCache]: Analyzing trace with hash 2094542434, now seen corresponding path program 1 times
[2020-08-21 22:11:05,395 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:05,396 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876462157]
[2020-08-21 22:11:05,396 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:05,413 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:05,435 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:05,435 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:05,439 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:05,439 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876462157]
[2020-08-21 22:11:05,440 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:05,440 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:05,440 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095994033]
[2020-08-21 22:11:05,441 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:05,441 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:05,441 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:05,441 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:05,442 INFO  L87              Difference]: Start difference. First operand 526 states and 799 transitions. Second operand 3 states.
[2020-08-21 22:11:05,459 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:05,460 INFO  L93              Difference]: Finished difference Result 1038 states and 1580 transitions.
[2020-08-21 22:11:05,460 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:05,460 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 45
[2020-08-21 22:11:05,461 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:05,464 INFO  L225             Difference]: With dead ends: 1038
[2020-08-21 22:11:05,464 INFO  L226             Difference]: Without dead ends: 526
[2020-08-21 22:11:05,465 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:05,466 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 526 states.
[2020-08-21 22:11:05,483 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 526.
[2020-08-21 22:11:05,483 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 526 states.
[2020-08-21 22:11:05,486 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 786 transitions.
[2020-08-21 22:11:05,486 INFO  L78                 Accepts]: Start accepts. Automaton has 526 states and 786 transitions. Word has length 45
[2020-08-21 22:11:05,486 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:05,486 INFO  L479      AbstractCegarLoop]: Abstraction has 526 states and 786 transitions.
[2020-08-21 22:11:05,486 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:05,487 INFO  L276                IsEmpty]: Start isEmpty. Operand 526 states and 786 transitions.
[2020-08-21 22:11:05,488 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2020-08-21 22:11:05,488 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:05,488 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:05,488 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-21 22:11:05,489 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:05,489 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:05,489 INFO  L82        PathProgramCache]: Analyzing trace with hash -1255579119, now seen corresponding path program 1 times
[2020-08-21 22:11:05,489 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:05,490 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357788244]
[2020-08-21 22:11:05,490 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:05,511 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:05,548 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:05,549 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:05,554 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:05,554 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357788244]
[2020-08-21 22:11:05,554 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:05,554 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:05,555 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346580343]
[2020-08-21 22:11:05,556 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:05,556 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:05,557 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:05,557 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:05,557 INFO  L87              Difference]: Start difference. First operand 526 states and 786 transitions. Second operand 3 states.
[2020-08-21 22:11:05,592 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:05,592 INFO  L93              Difference]: Finished difference Result 1048 states and 1566 transitions.
[2020-08-21 22:11:05,594 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:05,594 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 46
[2020-08-21 22:11:05,595 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:05,598 INFO  L225             Difference]: With dead ends: 1048
[2020-08-21 22:11:05,598 INFO  L226             Difference]: Without dead ends: 536
[2020-08-21 22:11:05,599 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:05,600 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 536 states.
[2020-08-21 22:11:05,640 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 534.
[2020-08-21 22:11:05,641 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 534 states.
[2020-08-21 22:11:05,646 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 783 transitions.
[2020-08-21 22:11:05,647 INFO  L78                 Accepts]: Start accepts. Automaton has 534 states and 783 transitions. Word has length 46
[2020-08-21 22:11:05,647 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:05,647 INFO  L479      AbstractCegarLoop]: Abstraction has 534 states and 783 transitions.
[2020-08-21 22:11:05,647 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:05,648 INFO  L276                IsEmpty]: Start isEmpty. Operand 534 states and 783 transitions.
[2020-08-21 22:11:05,649 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2020-08-21 22:11:05,649 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:05,649 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:05,650 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-21 22:11:05,650 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:05,650 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:05,650 INFO  L82        PathProgramCache]: Analyzing trace with hash -1258911171, now seen corresponding path program 1 times
[2020-08-21 22:11:05,651 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:05,651 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692427470]
[2020-08-21 22:11:05,651 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:05,678 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:05,716 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:05,716 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:05,721 INFO  L134       CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:05,721 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692427470]
[2020-08-21 22:11:05,723 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:05,723 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:05,723 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592601749]
[2020-08-21 22:11:05,724 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:05,724 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:05,724 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:05,724 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:05,724 INFO  L87              Difference]: Start difference. First operand 534 states and 783 transitions. Second operand 3 states.
[2020-08-21 22:11:05,942 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:05,942 INFO  L93              Difference]: Finished difference Result 1234 states and 1810 transitions.
[2020-08-21 22:11:05,943 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:05,943 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 50
[2020-08-21 22:11:05,944 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:05,949 INFO  L225             Difference]: With dead ends: 1234
[2020-08-21 22:11:05,949 INFO  L226             Difference]: Without dead ends: 670
[2020-08-21 22:11:05,952 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:05,954 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 670 states.
[2020-08-21 22:11:05,976 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 585.
[2020-08-21 22:11:05,976 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 585 states.
[2020-08-21 22:11:05,981 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 857 transitions.
[2020-08-21 22:11:05,981 INFO  L78                 Accepts]: Start accepts. Automaton has 585 states and 857 transitions. Word has length 50
[2020-08-21 22:11:05,981 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:05,982 INFO  L479      AbstractCegarLoop]: Abstraction has 585 states and 857 transitions.
[2020-08-21 22:11:05,982 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:05,982 INFO  L276                IsEmpty]: Start isEmpty. Operand 585 states and 857 transitions.
[2020-08-21 22:11:05,983 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2020-08-21 22:11:05,983 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:05,984 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:05,984 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-08-21 22:11:05,984 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:05,985 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:05,985 INFO  L82        PathProgramCache]: Analyzing trace with hash 1836171333, now seen corresponding path program 1 times
[2020-08-21 22:11:05,985 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:05,986 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388764841]
[2020-08-21 22:11:05,986 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:06,017 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:06,068 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:06,069 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:06,079 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:06,080 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388764841]
[2020-08-21 22:11:06,080 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:06,081 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:06,081 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456386678]
[2020-08-21 22:11:06,082 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:06,082 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:06,082 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:06,084 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:06,085 INFO  L87              Difference]: Start difference. First operand 585 states and 857 transitions. Second operand 3 states.
[2020-08-21 22:11:06,140 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:06,140 INFO  L93              Difference]: Finished difference Result 1720 states and 2523 transitions.
[2020-08-21 22:11:06,141 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:06,141 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 51
[2020-08-21 22:11:06,142 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:06,148 INFO  L225             Difference]: With dead ends: 1720
[2020-08-21 22:11:06,148 INFO  L226             Difference]: Without dead ends: 1149
[2020-08-21 22:11:06,150 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:06,152 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1149 states.
[2020-08-21 22:11:06,184 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 883.
[2020-08-21 22:11:06,184 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 883 states.
[2020-08-21 22:11:06,189 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1291 transitions.
[2020-08-21 22:11:06,189 INFO  L78                 Accepts]: Start accepts. Automaton has 883 states and 1291 transitions. Word has length 51
[2020-08-21 22:11:06,191 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:06,191 INFO  L479      AbstractCegarLoop]: Abstraction has 883 states and 1291 transitions.
[2020-08-21 22:11:06,192 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:06,192 INFO  L276                IsEmpty]: Start isEmpty. Operand 883 states and 1291 transitions.
[2020-08-21 22:11:06,193 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2020-08-21 22:11:06,193 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:06,193 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:06,194 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-08-21 22:11:06,194 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:06,194 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:06,194 INFO  L82        PathProgramCache]: Analyzing trace with hash -2035149241, now seen corresponding path program 1 times
[2020-08-21 22:11:06,195 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:06,195 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257104778]
[2020-08-21 22:11:06,196 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:06,215 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:06,243 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:06,243 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:06,251 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:06,251 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257104778]
[2020-08-21 22:11:06,251 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:06,252 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:06,255 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561640019]
[2020-08-21 22:11:06,255 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:06,256 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:06,257 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:06,257 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:06,257 INFO  L87              Difference]: Start difference. First operand 883 states and 1291 transitions. Second operand 3 states.
[2020-08-21 22:11:06,343 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:06,343 INFO  L93              Difference]: Finished difference Result 2602 states and 3797 transitions.
[2020-08-21 22:11:06,343 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:06,344 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 51
[2020-08-21 22:11:06,346 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:06,357 INFO  L225             Difference]: With dead ends: 2602
[2020-08-21 22:11:06,358 INFO  L226             Difference]: Without dead ends: 1734
[2020-08-21 22:11:06,360 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:06,363 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1734 states.
[2020-08-21 22:11:06,443 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1732.
[2020-08-21 22:11:06,443 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1732 states.
[2020-08-21 22:11:06,451 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1732 states to 1732 states and 2493 transitions.
[2020-08-21 22:11:06,452 INFO  L78                 Accepts]: Start accepts. Automaton has 1732 states and 2493 transitions. Word has length 51
[2020-08-21 22:11:06,452 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:06,452 INFO  L479      AbstractCegarLoop]: Abstraction has 1732 states and 2493 transitions.
[2020-08-21 22:11:06,452 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:06,453 INFO  L276                IsEmpty]: Start isEmpty. Operand 1732 states and 2493 transitions.
[2020-08-21 22:11:06,454 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 53
[2020-08-21 22:11:06,454 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:06,454 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:06,455 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-08-21 22:11:06,455 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:06,455 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:06,455 INFO  L82        PathProgramCache]: Analyzing trace with hash 407760342, now seen corresponding path program 1 times
[2020-08-21 22:11:06,455 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:06,456 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502050665]
[2020-08-21 22:11:06,456 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:06,480 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:06,510 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:06,510 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:06,513 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:06,513 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502050665]
[2020-08-21 22:11:06,514 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:06,514 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:06,514 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198094285]
[2020-08-21 22:11:06,514 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:06,516 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:06,516 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:06,516 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:06,516 INFO  L87              Difference]: Start difference. First operand 1732 states and 2493 transitions. Second operand 3 states.
[2020-08-21 22:11:06,706 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:06,706 INFO  L93              Difference]: Finished difference Result 3635 states and 5182 transitions.
[2020-08-21 22:11:06,706 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:06,707 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 52
[2020-08-21 22:11:06,708 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:06,718 INFO  L225             Difference]: With dead ends: 3635
[2020-08-21 22:11:06,718 INFO  L226             Difference]: Without dead ends: 1924
[2020-08-21 22:11:06,725 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:06,728 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1924 states.
[2020-08-21 22:11:06,794 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1924 to 1835.
[2020-08-21 22:11:06,795 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1835 states.
[2020-08-21 22:11:06,803 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2610 transitions.
[2020-08-21 22:11:06,804 INFO  L78                 Accepts]: Start accepts. Automaton has 1835 states and 2610 transitions. Word has length 52
[2020-08-21 22:11:06,804 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:06,804 INFO  L479      AbstractCegarLoop]: Abstraction has 1835 states and 2610 transitions.
[2020-08-21 22:11:06,804 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:06,804 INFO  L276                IsEmpty]: Start isEmpty. Operand 1835 states and 2610 transitions.
[2020-08-21 22:11:06,805 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-08-21 22:11:06,806 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:06,806 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:06,806 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-08-21 22:11:06,806 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:06,806 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:06,807 INFO  L82        PathProgramCache]: Analyzing trace with hash 675528416, now seen corresponding path program 1 times
[2020-08-21 22:11:06,807 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:06,807 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014534060]
[2020-08-21 22:11:06,807 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:06,829 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:06,859 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:06,860 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:06,866 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:06,866 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014534060]
[2020-08-21 22:11:06,867 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:06,867 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:06,867 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216707057]
[2020-08-21 22:11:06,868 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:06,868 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:06,868 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:06,869 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:06,869 INFO  L87              Difference]: Start difference. First operand 1835 states and 2610 transitions. Second operand 3 states.
[2020-08-21 22:11:07,117 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:07,118 INFO  L93              Difference]: Finished difference Result 3747 states and 5296 transitions.
[2020-08-21 22:11:07,118 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:07,119 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 53
[2020-08-21 22:11:07,119 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:07,131 INFO  L225             Difference]: With dead ends: 3747
[2020-08-21 22:11:07,131 INFO  L226             Difference]: Without dead ends: 1933
[2020-08-21 22:11:07,136 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:07,140 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1933 states.
[2020-08-21 22:11:07,209 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1835.
[2020-08-21 22:11:07,209 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1835 states.
[2020-08-21 22:11:07,218 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2598 transitions.
[2020-08-21 22:11:07,218 INFO  L78                 Accepts]: Start accepts. Automaton has 1835 states and 2598 transitions. Word has length 53
[2020-08-21 22:11:07,219 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:07,219 INFO  L479      AbstractCegarLoop]: Abstraction has 1835 states and 2598 transitions.
[2020-08-21 22:11:07,220 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:07,220 INFO  L276                IsEmpty]: Start isEmpty. Operand 1835 states and 2598 transitions.
[2020-08-21 22:11:07,221 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 54
[2020-08-21 22:11:07,221 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:07,221 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:07,222 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-08-21 22:11:07,222 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:07,222 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:07,222 INFO  L82        PathProgramCache]: Analyzing trace with hash -1835277023, now seen corresponding path program 1 times
[2020-08-21 22:11:07,222 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:07,223 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [384884412]
[2020-08-21 22:11:07,223 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:07,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:07,264 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:07,264 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:07,267 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:07,268 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [384884412]
[2020-08-21 22:11:07,268 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:07,268 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:07,268 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49230044]
[2020-08-21 22:11:07,269 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:07,269 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:07,269 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:07,270 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:07,270 INFO  L87              Difference]: Start difference. First operand 1835 states and 2598 transitions. Second operand 3 states.
[2020-08-21 22:11:07,458 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:07,458 INFO  L93              Difference]: Finished difference Result 3744 states and 5269 transitions.
[2020-08-21 22:11:07,459 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:07,459 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 53
[2020-08-21 22:11:07,459 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:07,469 INFO  L225             Difference]: With dead ends: 3744
[2020-08-21 22:11:07,469 INFO  L226             Difference]: Without dead ends: 1930
[2020-08-21 22:11:07,474 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:07,477 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1930 states.
[2020-08-21 22:11:07,538 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1835.
[2020-08-21 22:11:07,538 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1835 states.
[2020-08-21 22:11:07,544 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2586 transitions.
[2020-08-21 22:11:07,545 INFO  L78                 Accepts]: Start accepts. Automaton has 1835 states and 2586 transitions. Word has length 53
[2020-08-21 22:11:07,545 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:07,545 INFO  L479      AbstractCegarLoop]: Abstraction has 1835 states and 2586 transitions.
[2020-08-21 22:11:07,545 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:07,546 INFO  L276                IsEmpty]: Start isEmpty. Operand 1835 states and 2586 transitions.
[2020-08-21 22:11:07,547 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-08-21 22:11:07,547 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:07,547 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:07,547 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-08-21 22:11:07,547 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:07,547 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:07,548 INFO  L82        PathProgramCache]: Analyzing trace with hash -194160723, now seen corresponding path program 1 times
[2020-08-21 22:11:07,548 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:07,548 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317393172]
[2020-08-21 22:11:07,548 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:07,561 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:07,589 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:07,590 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:07,593 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:07,594 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317393172]
[2020-08-21 22:11:07,594 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:07,594 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:07,594 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041183533]
[2020-08-21 22:11:07,595 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:07,595 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:07,595 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:07,595 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:07,596 INFO  L87              Difference]: Start difference. First operand 1835 states and 2586 transitions. Second operand 3 states.
[2020-08-21 22:11:07,803 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:07,803 INFO  L93              Difference]: Finished difference Result 3741 states and 5251 transitions.
[2020-08-21 22:11:07,803 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:07,803 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 56
[2020-08-21 22:11:07,804 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:07,813 INFO  L225             Difference]: With dead ends: 3741
[2020-08-21 22:11:07,813 INFO  L226             Difference]: Without dead ends: 1891
[2020-08-21 22:11:07,818 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:07,820 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1891 states.
[2020-08-21 22:11:07,877 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1891 to 1871.
[2020-08-21 22:11:07,877 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1871 states.
[2020-08-21 22:11:07,881 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2608 transitions.
[2020-08-21 22:11:07,881 INFO  L78                 Accepts]: Start accepts. Automaton has 1871 states and 2608 transitions. Word has length 56
[2020-08-21 22:11:07,882 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:07,882 INFO  L479      AbstractCegarLoop]: Abstraction has 1871 states and 2608 transitions.
[2020-08-21 22:11:07,882 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:07,882 INFO  L276                IsEmpty]: Start isEmpty. Operand 1871 states and 2608 transitions.
[2020-08-21 22:11:07,883 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2020-08-21 22:11:07,884 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:07,884 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:07,884 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-08-21 22:11:07,884 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:07,884 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:07,885 INFO  L82        PathProgramCache]: Analyzing trace with hash 991849692, now seen corresponding path program 1 times
[2020-08-21 22:11:07,885 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:07,889 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916263490]
[2020-08-21 22:11:07,890 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:07,909 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:07,942 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:07,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:07,946 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:07,946 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916263490]
[2020-08-21 22:11:07,947 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:07,947 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:07,947 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654695410]
[2020-08-21 22:11:07,948 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:07,948 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:07,948 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:07,948 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:07,949 INFO  L87              Difference]: Start difference. First operand 1871 states and 2608 transitions. Second operand 3 states.
[2020-08-21 22:11:08,133 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:08,133 INFO  L93              Difference]: Finished difference Result 3810 states and 5283 transitions.
[2020-08-21 22:11:08,133 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:08,133 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 57
[2020-08-21 22:11:08,134 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:08,142 INFO  L225             Difference]: With dead ends: 3810
[2020-08-21 22:11:08,143 INFO  L226             Difference]: Without dead ends: 1960
[2020-08-21 22:11:08,147 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:08,150 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1960 states.
[2020-08-21 22:11:08,215 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1871.
[2020-08-21 22:11:08,215 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1871 states.
[2020-08-21 22:11:08,219 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2596 transitions.
[2020-08-21 22:11:08,220 INFO  L78                 Accepts]: Start accepts. Automaton has 1871 states and 2596 transitions. Word has length 57
[2020-08-21 22:11:08,220 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:08,220 INFO  L479      AbstractCegarLoop]: Abstraction has 1871 states and 2596 transitions.
[2020-08-21 22:11:08,220 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:08,220 INFO  L276                IsEmpty]: Start isEmpty. Operand 1871 states and 2596 transitions.
[2020-08-21 22:11:08,224 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 59
[2020-08-21 22:11:08,225 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:08,225 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:08,225 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2020-08-21 22:11:08,225 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:08,225 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:08,226 INFO  L82        PathProgramCache]: Analyzing trace with hash -1291355310, now seen corresponding path program 1 times
[2020-08-21 22:11:08,226 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:08,226 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214125141]
[2020-08-21 22:11:08,226 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:08,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:08,269 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:08,270 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:08,273 INFO  L134       CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 22:11:08,273 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [214125141]
[2020-08-21 22:11:08,274 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:08,274 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:08,274 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011272142]
[2020-08-21 22:11:08,274 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:08,275 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:08,275 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:08,275 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:08,275 INFO  L87              Difference]: Start difference. First operand 1871 states and 2596 transitions. Second operand 3 states.
[2020-08-21 22:11:08,504 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:08,505 INFO  L93              Difference]: Finished difference Result 3946 states and 5421 transitions.
[2020-08-21 22:11:08,505 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:08,505 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 58
[2020-08-21 22:11:08,506 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:08,516 INFO  L225             Difference]: With dead ends: 3946
[2020-08-21 22:11:08,516 INFO  L226             Difference]: Without dead ends: 2096
[2020-08-21 22:11:08,521 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:08,524 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2096 states.
[2020-08-21 22:11:08,589 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 2004.
[2020-08-21 22:11:08,589 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2004 states.
[2020-08-21 22:11:08,593 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2743 transitions.
[2020-08-21 22:11:08,593 INFO  L78                 Accepts]: Start accepts. Automaton has 2004 states and 2743 transitions. Word has length 58
[2020-08-21 22:11:08,594 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:08,594 INFO  L479      AbstractCegarLoop]: Abstraction has 2004 states and 2743 transitions.
[2020-08-21 22:11:08,594 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:08,594 INFO  L276                IsEmpty]: Start isEmpty. Operand 2004 states and 2743 transitions.
[2020-08-21 22:11:08,595 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2020-08-21 22:11:08,595 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:08,595 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:08,596 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2020-08-21 22:11:08,596 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:08,596 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:08,596 INFO  L82        PathProgramCache]: Analyzing trace with hash -2083485680, now seen corresponding path program 1 times
[2020-08-21 22:11:08,597 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:08,597 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757595428]
[2020-08-21 22:11:08,597 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:08,612 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:08,625 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:08,625 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:08,628 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-08-21 22:11:08,628 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757595428]
[2020-08-21 22:11:08,629 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:08,629 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:08,629 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910596759]
[2020-08-21 22:11:08,630 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:08,630 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:08,630 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:08,630 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:08,630 INFO  L87              Difference]: Start difference. First operand 2004 states and 2743 transitions. Second operand 3 states.
[2020-08-21 22:11:08,873 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:08,873 INFO  L93              Difference]: Finished difference Result 4276 states and 5918 transitions.
[2020-08-21 22:11:08,874 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:08,874 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 61
[2020-08-21 22:11:08,874 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:08,885 INFO  L225             Difference]: With dead ends: 4276
[2020-08-21 22:11:08,885 INFO  L226             Difference]: Without dead ends: 2293
[2020-08-21 22:11:08,889 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:08,893 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2293 states.
[2020-08-21 22:11:08,964 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2293 to 2257.
[2020-08-21 22:11:08,965 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2257 states.
[2020-08-21 22:11:08,969 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3012 transitions.
[2020-08-21 22:11:08,969 INFO  L78                 Accepts]: Start accepts. Automaton has 2257 states and 3012 transitions. Word has length 61
[2020-08-21 22:11:08,970 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:08,970 INFO  L479      AbstractCegarLoop]: Abstraction has 2257 states and 3012 transitions.
[2020-08-21 22:11:08,970 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:08,970 INFO  L276                IsEmpty]: Start isEmpty. Operand 2257 states and 3012 transitions.
[2020-08-21 22:11:08,971 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2020-08-21 22:11:08,971 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:08,971 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:08,972 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2020-08-21 22:11:08,972 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:08,972 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:08,972 INFO  L82        PathProgramCache]: Analyzing trace with hash -1403427310, now seen corresponding path program 1 times
[2020-08-21 22:11:08,972 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:08,973 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429345155]
[2020-08-21 22:11:08,973 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:08,984 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:09,008 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 22:11:09,009 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 22:11:09,015 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked.
[2020-08-21 22:11:09,016 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429345155]
[2020-08-21 22:11:09,016 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 22:11:09,016 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 22:11:09,016 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640148006]
[2020-08-21 22:11:09,017 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 22:11:09,018 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 22:11:09,019 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 22:11:09,019 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:09,019 INFO  L87              Difference]: Start difference. First operand 2257 states and 3012 transitions. Second operand 3 states.
[2020-08-21 22:11:09,121 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 22:11:09,121 INFO  L93              Difference]: Finished difference Result 4420 states and 5869 transitions.
[2020-08-21 22:11:09,122 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 22:11:09,122 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 61
[2020-08-21 22:11:09,122 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 22:11:09,135 INFO  L225             Difference]: With dead ends: 4420
[2020-08-21 22:11:09,136 INFO  L226             Difference]: Without dead ends: 2947
[2020-08-21 22:11:09,139 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 22:11:09,143 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2947 states.
[2020-08-21 22:11:09,225 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2947 to 2227.
[2020-08-21 22:11:09,225 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2227 states.
[2020-08-21 22:11:09,230 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2227 states to 2227 states and 2957 transitions.
[2020-08-21 22:11:09,230 INFO  L78                 Accepts]: Start accepts. Automaton has 2227 states and 2957 transitions. Word has length 61
[2020-08-21 22:11:09,230 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 22:11:09,231 INFO  L479      AbstractCegarLoop]: Abstraction has 2227 states and 2957 transitions.
[2020-08-21 22:11:09,231 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 22:11:09,231 INFO  L276                IsEmpty]: Start isEmpty. Operand 2227 states and 2957 transitions.
[2020-08-21 22:11:09,232 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2020-08-21 22:11:09,232 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 22:11:09,232 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 22:11:09,233 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2020-08-21 22:11:09,233 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 22:11:09,233 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 22:11:09,233 INFO  L82        PathProgramCache]: Analyzing trace with hash -1616425408, now seen corresponding path program 1 times
[2020-08-21 22:11:09,234 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 22:11:09,234 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847319312]
[2020-08-21 22:11:09,234 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 22:11:09,270 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-21 22:11:09,272 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-21 22:11:09,272 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-21 22:11:09,279 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2020-08-21 22:11:09,324 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:11:09 BoogieIcfgContainer
[2020-08-21 22:11:09,325 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-21 22:11:09,333 INFO  L168              Benchmark]: Toolchain (without parser) took 7631.98 ms. Allocated memory was 142.6 MB in the beginning and 351.3 MB in the end (delta: 208.7 MB). Free memory was 104.9 MB in the beginning and 256.2 MB in the end (delta: -151.3 MB). Peak memory consumption was 57.4 MB. Max. memory is 7.1 GB.
[2020-08-21 22:11:09,335 INFO  L168              Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-08-21 22:11:09,340 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 505.38 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 104.5 MB in the beginning and 180.2 MB in the end (delta: -75.7 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB.
[2020-08-21 22:11:09,341 INFO  L168              Benchmark]: Boogie Preprocessor took 62.66 ms. Allocated memory is still 205.0 MB. Free memory was 180.2 MB in the beginning and 177.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB.
[2020-08-21 22:11:09,341 INFO  L168              Benchmark]: RCFGBuilder took 865.67 ms. Allocated memory is still 205.0 MB. Free memory was 177.1 MB in the beginning and 123.6 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB.
[2020-08-21 22:11:09,344 INFO  L168              Benchmark]: TraceAbstraction took 6189.99 ms. Allocated memory was 205.0 MB in the beginning and 351.3 MB in the end (delta: 146.3 MB). Free memory was 123.6 MB in the beginning and 256.2 MB in the end (delta: -132.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB.
[2020-08-21 22:11:09,349 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.17 ms. Allocated memory is still 142.6 MB. Free memory was 124.1 MB in the beginning and 123.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 505.38 ms. Allocated memory was 142.6 MB in the beginning and 205.0 MB in the end (delta: 62.4 MB). Free memory was 104.5 MB in the beginning and 180.2 MB in the end (delta: -75.7 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 62.66 ms. Allocated memory is still 205.0 MB. Free memory was 180.2 MB in the beginning and 177.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 865.67 ms. Allocated memory is still 205.0 MB. Free memory was 177.1 MB in the beginning and 123.6 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 6189.99 ms. Allocated memory was 205.0 MB in the beginning and 351.3 MB in the end (delta: 146.3 MB). Free memory was 123.6 MB in the beginning and 256.2 MB in the end (delta: -132.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 640]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L645]              int s ;
[L646]              int tmp ;
[L650]              s = 8464
[L651]  CALL        ssl3_accept(s)
[L11]               int s__info_callback = __VERIFIER_nondet_int() ;
[L12]               int s__in_handshake = __VERIFIER_nondet_int() ;
[L13]               int s__state ;
[L14]               int s__new_session ;
[L15]               int s__server ;
[L16]               int s__version = __VERIFIER_nondet_int() ;
[L17]               int s__type ;
[L18]               int s__init_num ;
[L19]               int s__hit = __VERIFIER_nondet_int() ;
[L20]               int s__rwstate ;
[L21]               int s__init_buf___0 = 1;
[L22]               int s__debug = __VERIFIER_nondet_int() ;
[L23]               int s__shutdown ;
[L24]               int s__cert = __VERIFIER_nondet_int() ;
[L25]               int s__options = __VERIFIER_nondet_int() ;
[L26]               int s__verify_mode = __VERIFIER_nondet_int() ;
[L27]               int s__session__peer = __VERIFIER_nondet_int() ;
[L28]               int s__cert__pkeys__AT0__privatekey = __VERIFIER_nondet_int() ;
[L29]               int s__ctx__info_callback = __VERIFIER_nondet_int() ;
[L30]               int s__ctx__stats__sess_accept_renegotiate = __VERIFIER_nondet_int() ;
[L31]               int s__ctx__stats__sess_accept = __VERIFIER_nondet_int() ;
[L32]               int s__ctx__stats__sess_accept_good = __VERIFIER_nondet_int() ;
[L33]               int s__s3__tmp__cert_request ;
[L34]               int s__s3__tmp__reuse_message ;
[L35]               int s__s3__tmp__use_rsa_tmp ;
[L36]               int s__s3__tmp__new_cipher = __VERIFIER_nondet_int() ;
[L37]               int s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int() ;
[L38]               int s__s3__tmp__next_state___0 ;
[L39]               int s__s3__tmp__new_cipher__algo_strength = __VERIFIER_nondet_int() ;
[L40]               int s__session__cipher ;
[L41]               int buf ;
[L42]               unsigned long l ;
[L43]               unsigned long Time ;
[L44]               unsigned long tmp ;
[L45]               int cb ;
[L46]               long num1 = __VERIFIER_nondet_long() ;
[L47]               int ret ;
[L48]               int new_state ;
[L49]               int state ;
[L50]               int skip ;
[L51]               int got_new_session ;
[L52]               int tmp___1 = __VERIFIER_nondet_int() ;
[L53]               int tmp___2 = __VERIFIER_nondet_int() ;
[L54]               int tmp___3 = __VERIFIER_nondet_int() ;
[L55]               int tmp___4 = __VERIFIER_nondet_int() ;
[L56]               int tmp___5 = __VERIFIER_nondet_int() ;
[L57]               int tmp___6 = __VERIFIER_nondet_int() ;
[L58]               int tmp___7 ;
[L59]               long tmp___8 = __VERIFIER_nondet_long() ;
[L60]               int tmp___9 = __VERIFIER_nondet_int() ;
[L61]               int tmp___10 = __VERIFIER_nondet_int() ;
[L62]               int blastFlag ;
[L63]               int __cil_tmp55 ;
[L64]               unsigned long __cil_tmp56 ;
[L65]               unsigned long __cil_tmp57 ;
[L66]               unsigned long __cil_tmp58 ;
[L67]               unsigned long __cil_tmp59 ;
[L68]               int __cil_tmp60 ;
[L69]               unsigned long __cil_tmp61 ;
[L72]               s__s3__tmp__reuse_message = 0
[L73]               s__state = initial_state
[L74]               blastFlag = 0
[L75]               tmp = __VERIFIER_nondet_int()
[L76]               Time = tmp
[L77]               cb = 0
[L78]               ret = -1
[L79]               skip = 0
[L80]               got_new_session = 0
[L81]   COND TRUE   s__info_callback != 0
[L82]               cb = s__info_callback
[L88]               s__in_handshake ++
[L89]   COND TRUE   tmp___1 + 12288
[L90]   COND TRUE   tmp___2 + 16384
[L94]   COND FALSE  !(s__cert == 0)
[L98]   COND TRUE   1
[L100]              state = s__state
[L101]  COND FALSE  !(s__state == 12292)
[L104]  COND FALSE  !(s__state == 16384)
[L107]  COND FALSE  !(s__state == 8192)
[L110]  COND FALSE  !(s__state == 24576)
[L113]  COND FALSE  !(s__state == 8195)
[L116]  COND FALSE  !(s__state == 8480)
[L119]  COND FALSE  !(s__state == 8481)
[L122]  COND FALSE  !(s__state == 8482)
[L125]  COND TRUE   s__state == 8464
[L271]              s__shutdown = 0
[L272]              ret = __VERIFIER_nondet_int()
[L273]  COND TRUE   blastFlag == 0
[L274]              blastFlag = 1
[L276]  COND FALSE  !(ret <= 0)
[L279]              got_new_session = 1
[L280]              s__state = 8496
[L281]              s__init_num = 0
[L602]  COND TRUE   ! s__s3__tmp__reuse_message
[L603]  COND TRUE   ! skip
[L604]  COND TRUE   tmp___1 != -12288
[L605]  COND TRUE   s__state != 8656
[L606]  COND TRUE   tmp___2 != -16384
[L607]  COND FALSE  !(state == 8496)
[L614]  COND FALSE  !(\read(s__debug))
[L620]  COND TRUE   cb != 0
[L621]  COND TRUE   s__state != state
[L622]              new_state = s__state
[L623]              s__state = state
[L624]              s__state = new_state
[L629]              skip = 0
[L98]   COND TRUE   1
[L100]              state = s__state
[L101]  COND FALSE  !(s__state == 12292)
[L104]  COND FALSE  !(s__state == 16384)
[L107]  COND FALSE  !(s__state == 8192)
[L110]  COND FALSE  !(s__state == 24576)
[L113]  COND FALSE  !(s__state == 8195)
[L116]  COND FALSE  !(s__state == 8480)
[L119]  COND FALSE  !(s__state == 8481)
[L122]  COND FALSE  !(s__state == 8482)
[L125]  COND FALSE  !(s__state == 8464)
[L128]  COND FALSE  !(s__state == 8465)
[L131]  COND FALSE  !(s__state == 8466)
[L134]  COND TRUE   s__state == 8496
[L285]              ret = __VERIFIER_nondet_int()
[L286]  COND TRUE   blastFlag == 1
[L287]              blastFlag = 2
[L289]  COND FALSE  !(ret <= 0)
[L292]  COND FALSE  !(\read(s__hit))
[L295]              s__state = 8512
[L297]              s__init_num = 0
[L602]  COND TRUE   ! s__s3__tmp__reuse_message
[L603]  COND TRUE   ! skip
[L604]  COND TRUE   tmp___1 != -12288
[L605]  COND TRUE   s__state != 8656
[L606]  COND TRUE   tmp___2 != -16384
[L607]  COND TRUE   state == 8496
[L640]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 159 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.0s, OverallIterations: 18, TraceHistogramMax: 2, AutomataDifference: 3.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3811 SDtfs, 3555 SDslu, 2450 SDs, 0 SdLazy, 1370 SolverSat, 407 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 103 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2257occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 17 MinimizatonAttempts, 1746 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 880 NumberOfCodeBlocks, 880 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 801 ConstructedInterpolants, 0 QuantifiedInterpolants, 88846 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 188/188 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...