/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 18:41:50,551 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 18:41:50,554 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 18:41:50,578 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 18:41:50,579 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 18:41:50,580 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 18:41:50,581 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 18:41:50,583 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 18:41:50,584 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 18:41:50,585 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 18:41:50,586 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 18:41:50,587 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 18:41:50,588 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 18:41:50,589 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 18:41:50,590 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 18:41:50,591 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 18:41:50,592 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 18:41:50,593 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 18:41:50,594 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 18:41:50,596 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 18:41:50,598 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 18:41:50,599 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 18:41:50,600 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 18:41:50,601 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 18:41:50,603 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 18:41:50,603 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 18:41:50,603 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 18:41:50,604 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 18:41:50,605 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 18:41:50,606 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 18:41:50,606 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 18:41:50,607 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 18:41:50,608 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 18:41:50,608 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 18:41:50,609 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 18:41:50,609 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 18:41:50,610 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 18:41:50,610 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 18:41:50,611 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 18:41:50,611 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 18:41:50,612 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 18:41:50,613 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
[2020-08-18 18:41:50,647 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 18:41:50,651 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 18:41:50,652 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 18:41:50,653 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 18:41:50,653 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 18:41:50,653 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 18:41:50,653 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 18:41:50,654 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 18:41:50,654 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 18:41:50,654 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 18:41:50,654 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 18:41:50,654 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 18:41:50,655 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 18:41:50,655 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 18:41:50,655 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 18:41:50,655 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 18:41:50,655 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 18:41:50,656 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 18:41:50,656 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 18:41:50,656 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 18:41:50,656 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 18:41:50,657 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 18:41:50,657 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 18:41:50,657 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 18:41:50,657 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 18:41:50,657 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 18:41:50,658 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 18:41:50,658 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 18:41:50,658 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 18:41:50,658 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=5;interpolation-heuristic=LOWLEXORDER;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER;
[2020-08-18 18:41:50,985 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 18:41:51,000 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 18:41:51,003 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 18:41:51,005 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 18:41:51,005 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 18:41:51,006 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c
[2020-08-18 18:41:51,075 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f81f8576b/2f83225cc806477f843aa3aa4c03e0e5/FLAG7c7a605b3
[2020-08-18 18:41:51,603 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 18:41:51,611 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ssh-simplified/s3_srvr_13.cil.c
[2020-08-18 18:41:51,633 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f81f8576b/2f83225cc806477f843aa3aa4c03e0e5/FLAG7c7a605b3
[2020-08-18 18:41:51,918 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f81f8576b/2f83225cc806477f843aa3aa4c03e0e5
[2020-08-18 18:41:51,931 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 18:41:51,934 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 18:41:51,936 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 18:41:51,936 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 18:41:51,940 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 18:41:51,941 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:51" (1/1) ...
[2020-08-18 18:41:51,945 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d80459b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:51, skipping insertion in model container
[2020-08-18 18:41:51,945 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:41:51" (1/1) ...
[2020-08-18 18:41:51,954 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 18:41:52,013 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 18:41:52,288 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 18:41:52,292 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 18:41:52,490 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 18:41:52,502 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 18:41:52,503 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52 WrapperNode
[2020-08-18 18:41:52,503 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 18:41:52,504 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 18:41:52,504 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 18:41:52,504 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 18:41:52,514 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ...
[2020-08-18 18:41:52,515 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ...
[2020-08-18 18:41:52,525 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ...
[2020-08-18 18:41:52,525 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ...
[2020-08-18 18:41:52,538 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ...
[2020-08-18 18:41:52,553 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ...
[2020-08-18 18:41:52,557 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (1/1) ...
[2020-08-18 18:41:52,561 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 18:41:52,562 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 18:41:52,562 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 18:41:52,562 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 18:41:52,563 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (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
[2020-08-18 18:41:52,635 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 18:41:52,636 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 18:41:52,636 INFO  L138     BoogieDeclarations]: Found implementation of procedure ssl3_accept
[2020-08-18 18:41:52,636 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 18:41:52,636 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 18:41:52,636 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 18:41:52,637 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-18 18:41:52,637 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long
[2020-08-18 18:41:52,637 INFO  L130     BoogieDeclarations]: Found specification of procedure ssl3_accept
[2020-08-18 18:41:52,637 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 18:41:52,637 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 18:41:52,637 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 18:41:52,924 WARN  L779   $ProcedureCfgBuilder]: Label in the middle of a codeblock.
[2020-08-18 18:41:53,452 INFO  L732   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false;
[2020-08-18 18:41:53,453 INFO  L732   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false;
[2020-08-18 18:41:53,465 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 18:41:53,465 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-08-18 18:41:53,471 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:53 BoogieIcfgContainer
[2020-08-18 18:41:53,471 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 18:41:53,473 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 18:41:53,473 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 18:41:53,477 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 18:41:53,477 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:41:51" (1/3) ...
[2020-08-18 18:41:53,478 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749878e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:53, skipping insertion in model container
[2020-08-18 18:41:53,478 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:41:52" (2/3) ...
[2020-08-18 18:41:53,479 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749878e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:41:53, skipping insertion in model container
[2020-08-18 18:41:53,479 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:41:53" (3/3) ...
[2020-08-18 18:41:53,481 INFO  L109   eAbstractionObserver]: Analyzing ICFG s3_srvr_13.cil.c
[2020-08-18 18:41:53,493 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 18:41:53,501 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 18:41:53,515 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 18:41:53,546 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 18:41:53,547 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 18:41:53,547 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 18:41:53,547 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 18:41:53,547 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 18:41:53,547 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 18:41:53,548 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 18:41:53,548 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 18:41:53,573 INFO  L276                IsEmpty]: Start isEmpty. Operand 161 states.
[2020-08-18 18:41:53,582 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-08-18 18:41:53,582 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:53,583 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]
[2020-08-18 18:41:53,584 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:53,590 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:53,591 INFO  L82        PathProgramCache]: Analyzing trace with hash 317102767, now seen corresponding path program 1 times
[2020-08-18 18:41:53,601 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:53,601 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089811617]
[2020-08-18 18:41:53,602 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:53,777 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:53,948 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:53,949 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:53,958 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 18:41:53,959 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089811617]
[2020-08-18 18:41:53,962 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:53,962 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 18:41:53,963 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255757851]
[2020-08-18 18:41:53,969 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 18:41:53,969 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:53,984 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 18:41:53,985 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 18:41:53,987 INFO  L87              Difference]: Start difference. First operand 161 states. Second operand 5 states.
[2020-08-18 18:41:54,596 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:54,597 INFO  L93              Difference]: Finished difference Result 376 states and 647 transitions.
[2020-08-18 18:41:54,597 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 18:41:54,599 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 31
[2020-08-18 18:41:54,599 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:54,628 INFO  L225             Difference]: With dead ends: 376
[2020-08-18 18:41:54,629 INFO  L226             Difference]: Without dead ends: 193
[2020-08-18 18:41:54,636 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
[2020-08-18 18:41:54,657 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 193 states.
[2020-08-18 18:41:54,698 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189.
[2020-08-18 18:41:54,699 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 189 states.
[2020-08-18 18:41:54,702 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 279 transitions.
[2020-08-18 18:41:54,704 INFO  L78                 Accepts]: Start accepts. Automaton has 189 states and 279 transitions. Word has length 31
[2020-08-18 18:41:54,705 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:54,705 INFO  L479      AbstractCegarLoop]: Abstraction has 189 states and 279 transitions.
[2020-08-18 18:41:54,705 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 18:41:54,705 INFO  L276                IsEmpty]: Start isEmpty. Operand 189 states and 279 transitions.
[2020-08-18 18:41:54,707 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2020-08-18 18:41:54,707 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:54,707 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, 1, 1]
[2020-08-18 18:41:54,708 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 18:41:54,708 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:54,708 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:54,709 INFO  L82        PathProgramCache]: Analyzing trace with hash 115186168, now seen corresponding path program 1 times
[2020-08-18 18:41:54,709 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:54,709 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12056480]
[2020-08-18 18:41:54,709 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:54,746 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:54,825 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:54,826 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:54,830 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 18:41:54,830 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12056480]
[2020-08-18 18:41:54,830 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:54,831 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 18:41:54,831 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439752783]
[2020-08-18 18:41:54,833 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 18:41:54,833 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:54,833 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 18:41:54,834 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 18:41:54,834 INFO  L87              Difference]: Start difference. First operand 189 states and 279 transitions. Second operand 6 states.
[2020-08-18 18:41:55,208 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:55,209 INFO  L93              Difference]: Finished difference Result 444 states and 670 transitions.
[2020-08-18 18:41:55,209 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-18 18:41:55,210 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 35
[2020-08-18 18:41:55,210 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:55,217 INFO  L225             Difference]: With dead ends: 444
[2020-08-18 18:41:55,217 INFO  L226             Difference]: Without dead ends: 256
[2020-08-18 18:41:55,222 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
[2020-08-18 18:41:55,223 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 256 states.
[2020-08-18 18:41:55,259 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 217.
[2020-08-18 18:41:55,263 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 217 states.
[2020-08-18 18:41:55,265 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 318 transitions.
[2020-08-18 18:41:55,265 INFO  L78                 Accepts]: Start accepts. Automaton has 217 states and 318 transitions. Word has length 35
[2020-08-18 18:41:55,268 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:55,268 INFO  L479      AbstractCegarLoop]: Abstraction has 217 states and 318 transitions.
[2020-08-18 18:41:55,268 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 18:41:55,268 INFO  L276                IsEmpty]: Start isEmpty. Operand 217 states and 318 transitions.
[2020-08-18 18:41:55,272 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2020-08-18 18:41:55,272 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:55,277 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:55,277 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 18:41:55,278 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:55,278 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:55,278 INFO  L82        PathProgramCache]: Analyzing trace with hash 1717181183, now seen corresponding path program 1 times
[2020-08-18 18:41:55,278 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:55,279 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1791103232]
[2020-08-18 18:41:55,279 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:55,312 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:55,343 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:55,344 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:55,350 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 18:41:55,350 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1791103232]
[2020-08-18 18:41:55,351 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:55,351 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 18:41:55,351 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462153661]
[2020-08-18 18:41:55,352 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 18:41:55,352 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:55,352 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 18:41:55,353 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 18:41:55,353 INFO  L87              Difference]: Start difference. First operand 217 states and 318 transitions. Second operand 3 states.
[2020-08-18 18:41:55,591 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:55,591 INFO  L93              Difference]: Finished difference Result 505 states and 753 transitions.
[2020-08-18 18:41:55,593 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 18:41:55,593 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 49
[2020-08-18 18:41:55,593 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:55,596 INFO  L225             Difference]: With dead ends: 505
[2020-08-18 18:41:55,596 INFO  L226             Difference]: Without dead ends: 289
[2020-08-18 18:41:55,599 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
[2020-08-18 18:41:55,602 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 289 states.
[2020-08-18 18:41:55,639 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 259.
[2020-08-18 18:41:55,639 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 259 states.
[2020-08-18 18:41:55,642 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 380 transitions.
[2020-08-18 18:41:55,643 INFO  L78                 Accepts]: Start accepts. Automaton has 259 states and 380 transitions. Word has length 49
[2020-08-18 18:41:55,643 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:55,643 INFO  L479      AbstractCegarLoop]: Abstraction has 259 states and 380 transitions.
[2020-08-18 18:41:55,644 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 18:41:55,644 INFO  L276                IsEmpty]: Start isEmpty. Operand 259 states and 380 transitions.
[2020-08-18 18:41:55,651 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 58
[2020-08-18 18:41:55,651 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:55,651 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, 1, 1, 1, 1, 1]
[2020-08-18 18:41:55,654 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 18:41:55,655 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:55,655 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:55,655 INFO  L82        PathProgramCache]: Analyzing trace with hash -544977436, now seen corresponding path program 1 times
[2020-08-18 18:41:55,656 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:55,656 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1115007703]
[2020-08-18 18:41:55,656 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:55,709 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:55,748 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:55,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:55,755 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 18:41:55,756 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1115007703]
[2020-08-18 18:41:55,756 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-18 18:41:55,756 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4
[2020-08-18 18:41:55,756 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834930259]
[2020-08-18 18:41:55,757 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 18:41:55,757 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:55,757 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 18:41:55,758 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 18:41:55,758 INFO  L87              Difference]: Start difference. First operand 259 states and 380 transitions. Second operand 4 states.
[2020-08-18 18:41:55,998 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:55,998 INFO  L93              Difference]: Finished difference Result 665 states and 981 transitions.
[2020-08-18 18:41:55,999 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 18:41:55,999 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 57
[2020-08-18 18:41:55,999 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:56,001 INFO  L225             Difference]: With dead ends: 665
[2020-08-18 18:41:56,002 INFO  L226             Difference]: Without dead ends: 407
[2020-08-18 18:41:56,003 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 18:41:56,003 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 407 states.
[2020-08-18 18:41:56,021 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 285.
[2020-08-18 18:41:56,021 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 285 states.
[2020-08-18 18:41:56,023 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 417 transitions.
[2020-08-18 18:41:56,023 INFO  L78                 Accepts]: Start accepts. Automaton has 285 states and 417 transitions. Word has length 57
[2020-08-18 18:41:56,023 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:56,024 INFO  L479      AbstractCegarLoop]: Abstraction has 285 states and 417 transitions.
[2020-08-18 18:41:56,024 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 18:41:56,024 INFO  L276                IsEmpty]: Start isEmpty. Operand 285 states and 417 transitions.
[2020-08-18 18:41:56,026 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 68
[2020-08-18 18:41:56,026 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:56,026 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:56,027 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 18:41:56,027 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:56,027 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:56,027 INFO  L82        PathProgramCache]: Analyzing trace with hash 410586329, now seen corresponding path program 1 times
[2020-08-18 18:41:56,028 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:56,028 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838202827]
[2020-08-18 18:41:56,028 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:56,046 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:56,108 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:56,109 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:56,116 INFO  L134       CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked.
[2020-08-18 18:41:56,116 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838202827]
[2020-08-18 18:41:56,117 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:56,117 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 18:41:56,117 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552930152]
[2020-08-18 18:41:56,118 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 18:41:56,118 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:56,118 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 18:41:56,119 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 18:41:56,119 INFO  L87              Difference]: Start difference. First operand 285 states and 417 transitions. Second operand 5 states.
[2020-08-18 18:41:56,286 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:56,286 INFO  L93              Difference]: Finished difference Result 588 states and 861 transitions.
[2020-08-18 18:41:56,286 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 18:41:56,287 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 67
[2020-08-18 18:41:56,287 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:56,289 INFO  L225             Difference]: With dead ends: 588
[2020-08-18 18:41:56,289 INFO  L226             Difference]: Without dead ends: 316
[2020-08-18 18:41:56,291 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
[2020-08-18 18:41:56,291 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 316 states.
[2020-08-18 18:41:56,301 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 310.
[2020-08-18 18:41:56,302 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 310 states.
[2020-08-18 18:41:56,303 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 450 transitions.
[2020-08-18 18:41:56,304 INFO  L78                 Accepts]: Start accepts. Automaton has 310 states and 450 transitions. Word has length 67
[2020-08-18 18:41:56,304 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:56,304 INFO  L479      AbstractCegarLoop]: Abstraction has 310 states and 450 transitions.
[2020-08-18 18:41:56,304 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 18:41:56,304 INFO  L276                IsEmpty]: Start isEmpty. Operand 310 states and 450 transitions.
[2020-08-18 18:41:56,306 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2020-08-18 18:41:56,306 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:56,306 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:56,307 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 18:41:56,307 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:56,307 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:56,307 INFO  L82        PathProgramCache]: Analyzing trace with hash -206772919, now seen corresponding path program 1 times
[2020-08-18 18:41:56,308 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:56,308 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841149413]
[2020-08-18 18:41:56,308 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:56,354 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:56,415 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:56,416 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:56,425 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-08-18 18:41:56,426 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841149413]
[2020-08-18 18:41:56,427 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:56,427 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 18:41:56,427 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715075445]
[2020-08-18 18:41:56,429 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 18:41:56,429 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:56,430 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 18:41:56,433 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 18:41:56,434 INFO  L87              Difference]: Start difference. First operand 310 states and 450 transitions. Second operand 3 states.
[2020-08-18 18:41:56,659 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:56,660 INFO  L93              Difference]: Finished difference Result 689 states and 1019 transitions.
[2020-08-18 18:41:56,661 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 18:41:56,661 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 77
[2020-08-18 18:41:56,661 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:56,664 INFO  L225             Difference]: With dead ends: 689
[2020-08-18 18:41:56,664 INFO  L226             Difference]: Without dead ends: 367
[2020-08-18 18:41:56,665 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
[2020-08-18 18:41:56,666 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 367 states.
[2020-08-18 18:41:56,677 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 362.
[2020-08-18 18:41:56,677 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 362 states.
[2020-08-18 18:41:56,679 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 515 transitions.
[2020-08-18 18:41:56,679 INFO  L78                 Accepts]: Start accepts. Automaton has 362 states and 515 transitions. Word has length 77
[2020-08-18 18:41:56,680 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:56,680 INFO  L479      AbstractCegarLoop]: Abstraction has 362 states and 515 transitions.
[2020-08-18 18:41:56,680 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 18:41:56,680 INFO  L276                IsEmpty]: Start isEmpty. Operand 362 states and 515 transitions.
[2020-08-18 18:41:56,682 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 78
[2020-08-18 18:41:56,682 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:56,682 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:56,682 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 18:41:56,683 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:56,683 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:56,683 INFO  L82        PathProgramCache]: Analyzing trace with hash 67986695, now seen corresponding path program 1 times
[2020-08-18 18:41:56,683 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:56,684 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929513773]
[2020-08-18 18:41:56,684 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:56,704 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:56,726 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:56,727 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:56,732 INFO  L134       CoverageAnalysis]: Checked inductivity of 39 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-08-18 18:41:56,733 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929513773]
[2020-08-18 18:41:56,733 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:56,733 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 18:41:56,733 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276160330]
[2020-08-18 18:41:56,734 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 18:41:56,734 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:56,734 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 18:41:56,735 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 18:41:56,735 INFO  L87              Difference]: Start difference. First operand 362 states and 515 transitions. Second operand 3 states.
[2020-08-18 18:41:56,893 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:56,893 INFO  L93              Difference]: Finished difference Result 767 states and 1106 transitions.
[2020-08-18 18:41:56,894 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 18:41:56,894 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 77
[2020-08-18 18:41:56,895 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:56,897 INFO  L225             Difference]: With dead ends: 767
[2020-08-18 18:41:56,898 INFO  L226             Difference]: Without dead ends: 401
[2020-08-18 18:41:56,899 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
[2020-08-18 18:41:56,900 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 401 states.
[2020-08-18 18:41:56,913 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 396.
[2020-08-18 18:41:56,913 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 396 states.
[2020-08-18 18:41:56,915 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 559 transitions.
[2020-08-18 18:41:56,916 INFO  L78                 Accepts]: Start accepts. Automaton has 396 states and 559 transitions. Word has length 77
[2020-08-18 18:41:56,916 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:56,916 INFO  L479      AbstractCegarLoop]: Abstraction has 396 states and 559 transitions.
[2020-08-18 18:41:56,917 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 18:41:56,917 INFO  L276                IsEmpty]: Start isEmpty. Operand 396 states and 559 transitions.
[2020-08-18 18:41:56,918 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 80
[2020-08-18 18:41:56,918 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:56,918 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:56,919 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-08-18 18:41:56,919 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:56,919 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:56,919 INFO  L82        PathProgramCache]: Analyzing trace with hash 1023176064, now seen corresponding path program 1 times
[2020-08-18 18:41:56,920 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:56,920 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988961111]
[2020-08-18 18:41:56,920 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:56,941 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:56,961 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:56,962 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:56,967 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked.
[2020-08-18 18:41:56,967 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988961111]
[2020-08-18 18:41:56,967 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:56,968 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 18:41:56,968 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875978725]
[2020-08-18 18:41:56,968 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 18:41:56,969 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:56,969 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 18:41:56,969 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 18:41:56,969 INFO  L87              Difference]: Start difference. First operand 396 states and 559 transitions. Second operand 3 states.
[2020-08-18 18:41:56,999 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:56,999 INFO  L93              Difference]: Finished difference Result 785 states and 1109 transitions.
[2020-08-18 18:41:57,000 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 18:41:57,000 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 79
[2020-08-18 18:41:57,001 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:57,003 INFO  L225             Difference]: With dead ends: 785
[2020-08-18 18:41:57,003 INFO  L226             Difference]: Without dead ends: 402
[2020-08-18 18:41:57,004 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
[2020-08-18 18:41:57,005 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 402 states.
[2020-08-18 18:41:57,030 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 401.
[2020-08-18 18:41:57,030 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 401 states.
[2020-08-18 18:41:57,032 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 565 transitions.
[2020-08-18 18:41:57,032 INFO  L78                 Accepts]: Start accepts. Automaton has 401 states and 565 transitions. Word has length 79
[2020-08-18 18:41:57,033 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:57,033 INFO  L479      AbstractCegarLoop]: Abstraction has 401 states and 565 transitions.
[2020-08-18 18:41:57,033 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 18:41:57,033 INFO  L276                IsEmpty]: Start isEmpty. Operand 401 states and 565 transitions.
[2020-08-18 18:41:57,034 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 82
[2020-08-18 18:41:57,034 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:57,035 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:57,035 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-08-18 18:41:57,035 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:57,035 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:57,036 INFO  L82        PathProgramCache]: Analyzing trace with hash -1094958026, now seen corresponding path program 1 times
[2020-08-18 18:41:57,036 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:57,036 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575052055]
[2020-08-18 18:41:57,036 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:57,056 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:57,105 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:57,106 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:57,111 INFO  L134       CoverageAnalysis]: Checked inductivity of 43 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-08-18 18:41:57,112 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575052055]
[2020-08-18 18:41:57,112 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-08-18 18:41:57,112 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4
[2020-08-18 18:41:57,117 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729754328]
[2020-08-18 18:41:57,118 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 18:41:57,118 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:57,118 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 18:41:57,119 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 18:41:57,119 INFO  L87              Difference]: Start difference. First operand 401 states and 565 transitions. Second operand 4 states.
[2020-08-18 18:41:57,336 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:57,336 INFO  L93              Difference]: Finished difference Result 988 states and 1401 transitions.
[2020-08-18 18:41:57,337 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 18:41:57,337 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 81
[2020-08-18 18:41:57,337 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:57,341 INFO  L225             Difference]: With dead ends: 988
[2020-08-18 18:41:57,341 INFO  L226             Difference]: Without dead ends: 555
[2020-08-18 18:41:57,342 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 18:41:57,343 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 555 states.
[2020-08-18 18:41:57,357 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 451.
[2020-08-18 18:41:57,357 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 451 states.
[2020-08-18 18:41:57,359 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 638 transitions.
[2020-08-18 18:41:57,360 INFO  L78                 Accepts]: Start accepts. Automaton has 451 states and 638 transitions. Word has length 81
[2020-08-18 18:41:57,360 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:57,360 INFO  L479      AbstractCegarLoop]: Abstraction has 451 states and 638 transitions.
[2020-08-18 18:41:57,360 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 18:41:57,361 INFO  L276                IsEmpty]: Start isEmpty. Operand 451 states and 638 transitions.
[2020-08-18 18:41:57,362 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 85
[2020-08-18 18:41:57,362 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:57,362 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:57,363 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-08-18 18:41:57,363 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:57,363 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:57,363 INFO  L82        PathProgramCache]: Analyzing trace with hash -1152174724, now seen corresponding path program 1 times
[2020-08-18 18:41:57,364 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:57,364 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61962913]
[2020-08-18 18:41:57,364 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:57,379 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:57,399 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:57,400 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:57,404 INFO  L134       CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-08-18 18:41:57,405 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61962913]
[2020-08-18 18:41:57,405 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:57,405 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 18:41:57,405 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511930896]
[2020-08-18 18:41:57,406 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 18:41:57,406 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:57,406 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 18:41:57,406 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 18:41:57,407 INFO  L87              Difference]: Start difference. First operand 451 states and 638 transitions. Second operand 3 states.
[2020-08-18 18:41:57,544 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:57,544 INFO  L93              Difference]: Finished difference Result 936 states and 1328 transitions.
[2020-08-18 18:41:57,544 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 18:41:57,545 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 84
[2020-08-18 18:41:57,545 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:57,548 INFO  L225             Difference]: With dead ends: 936
[2020-08-18 18:41:57,548 INFO  L226             Difference]: Without dead ends: 483
[2020-08-18 18:41:57,549 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
[2020-08-18 18:41:57,550 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 483 states.
[2020-08-18 18:41:57,563 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 475.
[2020-08-18 18:41:57,563 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 475 states.
[2020-08-18 18:41:57,565 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 667 transitions.
[2020-08-18 18:41:57,565 INFO  L78                 Accepts]: Start accepts. Automaton has 475 states and 667 transitions. Word has length 84
[2020-08-18 18:41:57,566 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:57,566 INFO  L479      AbstractCegarLoop]: Abstraction has 475 states and 667 transitions.
[2020-08-18 18:41:57,566 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 18:41:57,566 INFO  L276                IsEmpty]: Start isEmpty. Operand 475 states and 667 transitions.
[2020-08-18 18:41:57,568 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 100
[2020-08-18 18:41:57,568 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:57,568 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:57,568 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-08-18 18:41:57,569 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:57,569 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:57,569 INFO  L82        PathProgramCache]: Analyzing trace with hash 404037349, now seen corresponding path program 1 times
[2020-08-18 18:41:57,569 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:57,569 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395524907]
[2020-08-18 18:41:57,570 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:57,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:57,618 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:57,619 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:57,630 INFO  L134       CoverageAnalysis]: Checked inductivity of 86 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked.
[2020-08-18 18:41:57,631 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395524907]
[2020-08-18 18:41:57,631 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:57,631 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 18:41:57,632 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747051439]
[2020-08-18 18:41:57,632 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 18:41:57,632 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:57,633 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 18:41:57,633 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 18:41:57,633 INFO  L87              Difference]: Start difference. First operand 475 states and 667 transitions. Second operand 3 states.
[2020-08-18 18:41:57,804 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:57,804 INFO  L93              Difference]: Finished difference Result 965 states and 1373 transitions.
[2020-08-18 18:41:57,804 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 18:41:57,805 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 99
[2020-08-18 18:41:57,805 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:57,808 INFO  L225             Difference]: With dead ends: 965
[2020-08-18 18:41:57,808 INFO  L226             Difference]: Without dead ends: 484
[2020-08-18 18:41:57,809 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
[2020-08-18 18:41:57,811 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 484 states.
[2020-08-18 18:41:57,837 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 469.
[2020-08-18 18:41:57,837 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 469 states.
[2020-08-18 18:41:57,840 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 651 transitions.
[2020-08-18 18:41:57,840 INFO  L78                 Accepts]: Start accepts. Automaton has 469 states and 651 transitions. Word has length 99
[2020-08-18 18:41:57,840 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:57,840 INFO  L479      AbstractCegarLoop]: Abstraction has 469 states and 651 transitions.
[2020-08-18 18:41:57,841 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 18:41:57,841 INFO  L276                IsEmpty]: Start isEmpty. Operand 469 states and 651 transitions.
[2020-08-18 18:41:57,842 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 108
[2020-08-18 18:41:57,842 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:57,843 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:57,843 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-08-18 18:41:57,843 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:57,843 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:57,843 INFO  L82        PathProgramCache]: Analyzing trace with hash -1557981007, now seen corresponding path program 1 times
[2020-08-18 18:41:57,844 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:57,844 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630608969]
[2020-08-18 18:41:57,844 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:57,863 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:57,889 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:41:57,890 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:41:57,898 INFO  L134       CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked.
[2020-08-18 18:41:57,898 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630608969]
[2020-08-18 18:41:57,899 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:41:57,899 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 18:41:57,899 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760393500]
[2020-08-18 18:41:57,899 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 18:41:57,900 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:41:57,900 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 18:41:57,900 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 18:41:57,900 INFO  L87              Difference]: Start difference. First operand 469 states and 651 transitions. Second operand 3 states.
[2020-08-18 18:41:57,972 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:41:57,972 INFO  L93              Difference]: Finished difference Result 1381 states and 1919 transitions.
[2020-08-18 18:41:57,972 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 18:41:57,973 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 107
[2020-08-18 18:41:57,973 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:41:57,978 INFO  L225             Difference]: With dead ends: 1381
[2020-08-18 18:41:57,978 INFO  L226             Difference]: Without dead ends: 925
[2020-08-18 18:41:57,980 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
[2020-08-18 18:41:57,982 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 925 states.
[2020-08-18 18:41:58,009 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 923.
[2020-08-18 18:41:58,009 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 923 states.
[2020-08-18 18:41:58,014 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1278 transitions.
[2020-08-18 18:41:58,014 INFO  L78                 Accepts]: Start accepts. Automaton has 923 states and 1278 transitions. Word has length 107
[2020-08-18 18:41:58,015 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:41:58,015 INFO  L479      AbstractCegarLoop]: Abstraction has 923 states and 1278 transitions.
[2020-08-18 18:41:58,015 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 18:41:58,015 INFO  L276                IsEmpty]: Start isEmpty. Operand 923 states and 1278 transitions.
[2020-08-18 18:41:58,017 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 108
[2020-08-18 18:41:58,018 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:41:58,018 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:41:58,018 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-08-18 18:41:58,018 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:41:58,019 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:41:58,019 INFO  L82        PathProgramCache]: Analyzing trace with hash -2144787021, now seen corresponding path program 1 times
[2020-08-18 18:41:58,019 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:41:58,019 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161296018]
[2020-08-18 18:41:58,020 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:41:58,049 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-18 18:41:58,051 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-18 18:41:58,052 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-18 18:41:58,056 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-08-18 18:41:58,088 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:41:58 BoogieIcfgContainer
[2020-08-18 18:41:58,088 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-18 18:41:58,091 INFO  L168              Benchmark]: Toolchain (without parser) took 6156.83 ms. Allocated memory was 138.4 MB in the beginning and 297.3 MB in the end (delta: 158.9 MB). Free memory was 100.7 MB in the beginning and 193.4 MB in the end (delta: -92.7 MB). Peak memory consumption was 66.2 MB. Max. memory is 7.1 GB.
[2020-08-18 18:41:58,092 INFO  L168              Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-08-18 18:41:58,093 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 567.44 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.5 MB in the beginning and 176.0 MB in the end (delta: -75.5 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB.
[2020-08-18 18:41:58,093 INFO  L168              Benchmark]: Boogie Preprocessor took 57.78 ms. Allocated memory is still 201.3 MB. Free memory was 176.0 MB in the beginning and 173.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB.
[2020-08-18 18:41:58,094 INFO  L168              Benchmark]: RCFGBuilder took 909.74 ms. Allocated memory is still 201.3 MB. Free memory was 173.0 MB in the beginning and 119.5 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB.
[2020-08-18 18:41:58,095 INFO  L168              Benchmark]: TraceAbstraction took 4615.41 ms. Allocated memory was 201.3 MB in the beginning and 297.3 MB in the end (delta: 95.9 MB). Free memory was 118.8 MB in the beginning and 193.4 MB in the end (delta: -74.6 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB.
[2020-08-18 18:41:58,098 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 567.44 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 100.5 MB in the beginning and 176.0 MB in the end (delta: -75.5 MB). Peak memory consumption was 25.7 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 57.78 ms. Allocated memory is still 201.3 MB. Free memory was 176.0 MB in the beginning and 173.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 3.1 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 909.74 ms. Allocated memory is still 201.3 MB. Free memory was 173.0 MB in the beginning and 119.5 MB in the end (delta: 53.5 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 4615.41 ms. Allocated memory was 201.3 MB in the beginning and 297.3 MB in the end (delta: 95.9 MB). Free memory was 118.8 MB in the beginning and 193.4 MB in the end (delta: -74.6 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 642]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L647]              int s ;
[L648]              int tmp ;
[L652]              s = 8464
[L653]  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 ;
[L38]               int s__s3__tmp__next_state___0 ;
[L39]               int s__s3__tmp__new_cipher__algo_strength ;
[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 = __VERIFIER_nondet_int() ;
[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__state = initial_state
[L73]               blastFlag = 0
[L74]               tmp = __VERIFIER_nondet_int()
[L75]               Time = tmp
[L76]               cb = 0
[L77]               ret = -1
[L78]               skip = 0
[L79]               got_new_session = 0
[L80]   COND TRUE   s__info_callback != 0
[L81]               cb = s__info_callback
[L87]               s__in_handshake ++
[L88]   COND FALSE  !(tmp___1 + 12288)
[L93]   COND FALSE  !(s__cert == 0)
[L97]   COND TRUE   1
[L99]               state = s__state
[L100]  COND FALSE  !(s__state == 12292)
[L103]  COND FALSE  !(s__state == 16384)
[L106]  COND FALSE  !(s__state == 8192)
[L109]  COND FALSE  !(s__state == 24576)
[L112]  COND FALSE  !(s__state == 8195)
[L115]  COND FALSE  !(s__state == 8480)
[L118]  COND FALSE  !(s__state == 8481)
[L121]  COND FALSE  !(s__state == 8482)
[L124]  COND TRUE   s__state == 8464
[L270]              s__shutdown = 0
[L271]              ret = __VERIFIER_nondet_int()
[L272]  COND TRUE   blastFlag == 0
[L273]              blastFlag = 1
[L275]  COND FALSE  !(ret <= 0)
[L278]              got_new_session = 1
[L279]              s__state = 8496
[L280]              s__init_num = 0
[L599]              s__s3__tmp__reuse_message = __VERIFIER_nondet_int()
[L600]  COND FALSE  !(! s__s3__tmp__reuse_message)
[L631]              skip = 0
[L97]   COND TRUE   1
[L99]               state = s__state
[L100]  COND FALSE  !(s__state == 12292)
[L103]  COND FALSE  !(s__state == 16384)
[L106]  COND FALSE  !(s__state == 8192)
[L109]  COND FALSE  !(s__state == 24576)
[L112]  COND FALSE  !(s__state == 8195)
[L115]  COND FALSE  !(s__state == 8480)
[L118]  COND FALSE  !(s__state == 8481)
[L121]  COND FALSE  !(s__state == 8482)
[L124]  COND FALSE  !(s__state == 8464)
[L127]  COND FALSE  !(s__state == 8465)
[L130]  COND FALSE  !(s__state == 8466)
[L133]  COND TRUE   s__state == 8496
[L284]              ret = __VERIFIER_nondet_int()
[L285]  COND TRUE   blastFlag == 1
[L286]              blastFlag = 2
[L288]  COND FALSE  !(ret <= 0)
[L291]  COND FALSE  !(\read(s__hit))
[L294]              s__state = 8512
[L296]              s__init_num = 0
[L599]              s__s3__tmp__reuse_message = __VERIFIER_nondet_int()
[L600]  COND FALSE  !(! s__s3__tmp__reuse_message)
[L631]              skip = 0
[L97]   COND TRUE   1
[L99]               state = s__state
[L100]  COND FALSE  !(s__state == 12292)
[L103]  COND FALSE  !(s__state == 16384)
[L106]  COND FALSE  !(s__state == 8192)
[L109]  COND FALSE  !(s__state == 24576)
[L112]  COND FALSE  !(s__state == 8195)
[L115]  COND FALSE  !(s__state == 8480)
[L118]  COND FALSE  !(s__state == 8481)
[L121]  COND FALSE  !(s__state == 8482)
[L124]  COND FALSE  !(s__state == 8464)
[L127]  COND FALSE  !(s__state == 8465)
[L130]  COND FALSE  !(s__state == 8466)
[L133]  COND FALSE  !(s__state == 8496)
[L136]  COND FALSE  !(s__state == 8497)
[L139]  COND TRUE   s__state == 8512
[L301]              s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int()
[L302]              __cil_tmp56 = (unsigned long )s__s3__tmp__new_cipher__algorithms
[L303]  COND TRUE   __cil_tmp56 + 256UL
[L304]              skip = 1
[L315]              s__state = 8528
[L316]              s__init_num = 0
[L599]              s__s3__tmp__reuse_message = __VERIFIER_nondet_int()
[L600]  COND FALSE  !(! s__s3__tmp__reuse_message)
[L631]              skip = 0
[L97]   COND TRUE   1
[L99]               state = s__state
[L100]  COND FALSE  !(s__state == 12292)
[L103]  COND FALSE  !(s__state == 16384)
[L106]  COND FALSE  !(s__state == 8192)
[L109]  COND FALSE  !(s__state == 24576)
[L112]  COND FALSE  !(s__state == 8195)
[L115]  COND FALSE  !(s__state == 8480)
[L118]  COND FALSE  !(s__state == 8481)
[L121]  COND FALSE  !(s__state == 8482)
[L124]  COND FALSE  !(s__state == 8464)
[L127]  COND FALSE  !(s__state == 8465)
[L130]  COND FALSE  !(s__state == 8466)
[L133]  COND FALSE  !(s__state == 8496)
[L136]  COND FALSE  !(s__state == 8497)
[L139]  COND FALSE  !(s__state == 8512)
[L142]  COND FALSE  !(s__state == 8513)
[L145]  COND TRUE   s__state == 8528
[L320]              s__s3__tmp__new_cipher__algorithms = __VERIFIER_nondet_int()
[L321]              l = (unsigned long )s__s3__tmp__new_cipher__algorithms
[L323]              __cil_tmp57 = (unsigned long )s__options
[L324]  COND TRUE   __cil_tmp57 + 2097152UL
[L325]              s__s3__tmp__use_rsa_tmp = 1
[L330]  COND TRUE   \read(s__s3__tmp__use_rsa_tmp)
[L357]              ret = __VERIFIER_nondet_int()
[L358]  COND FALSE  !(blastFlag == 6)
[L361]  COND FALSE  !(ret <= 0)
[L378]              s__state = 8544
[L379]              s__init_num = 0
[L599]              s__s3__tmp__reuse_message = __VERIFIER_nondet_int()
[L600]  COND TRUE   ! s__s3__tmp__reuse_message
[L601]  COND TRUE   ! skip
[L602]  COND TRUE   state == 8528
[L603]  COND TRUE   s__state == 8544
[L604]  COND TRUE   tmp___7 != 1024
[L605]  COND TRUE   tmp___7 != 512
[L606]  COND TRUE   __cil_tmp58 != 4294967294
[L607]  COND TRUE   l != 4294967266
[L642]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 161 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 13, TraceHistogramMax: 4, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2670 SDtfs, 1939 SDslu, 2959 SDs, 0 SdLazy, 1406 SolverSat, 341 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=923occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 341 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 950 NumberOfCodeBlocks, 950 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 831 ConstructedInterpolants, 0 QuantifiedInterpolants, 106011 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 12 InterpolantComputations, 10 PerfectInterpolantSequences, 421/425 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...