/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.assert.codeblocks.term.scoring.heuristic NUM_FUNCTIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c


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


This is Ultimate 0.1.25-79ed534
[2020-07-19 23:18:43,915 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2020-07-19 23:18:43,943 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-19 23:18:43,944 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-19 23:18:43,945 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-19 23:18:43,947 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-19 23:18:43,949 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-19 23:18:43,951 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-19 23:18:43,952 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-19 23:18:43,953 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-19 23:18:43,954 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
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[2020-07-19 23:18:43,966 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-19 23:18:43,967 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-19 23:18:43,982 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-19 23:18:43,982 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-19 23:18:43,983 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-19 23:18:43,984 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-19 23:18:43,984 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-19 23:18:43,984 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-19 23:18:43,984 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-19 23:18:43,984 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-19 23:18:43,985 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-19 23:18:43,985 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-19 23:18:43,985 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-19 23:18:43,985 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-19 23:18:43,985 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-19 23:18:43,986 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-19 23:18:43,986 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-19 23:18:43,986 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-19 23:18:43,986 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-19 23:18:43,986 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-19 23:18:43,987 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-19 23:18:43,987 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-19 23:18:43,987 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-19 23:18:43,987 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-19 23:18:43,987 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-19 23:18:43,988 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-19 23:18:43,988 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-19 23:18:43,988 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-19 23:18:43,988 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-19 23:18:43,988 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-19 23:18:43,989 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-19 23:18:43,989 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM
[2020-07-19 23:18:44,271 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-19 23:18:44,293 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-19 23:18:44,297 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-19 23:18:44,299 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-19 23:18:44,299 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-19 23:18:44,301 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c
[2020-07-19 23:18:44,379 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8979c6323/3b436e34e1714ffca875f0005da9ba66/FLAGe620087a9
[2020-07-19 23:18:44,907 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-19 23:18:44,907 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ssh-simplified/s3_srvr_12.cil.c
[2020-07-19 23:18:44,920 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8979c6323/3b436e34e1714ffca875f0005da9ba66/FLAGe620087a9
[2020-07-19 23:18:45,251 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8979c6323/3b436e34e1714ffca875f0005da9ba66
[2020-07-19 23:18:45,260 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-19 23:18:45,262 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-19 23:18:45,263 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-19 23:18:45,264 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-19 23:18:45,267 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-19 23:18:45,268 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:18:45" (1/1) ...
[2020-07-19 23:18:45,271 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7250cabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45, skipping insertion in model container
[2020-07-19 23:18:45,271 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:18:45" (1/1) ...
[2020-07-19 23:18:45,279 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-19 23:18:45,348 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-19 23:18:45,655 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-19 23:18:45,660 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-19 23:18:45,813 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-19 23:18:45,828 INFO  L208         MainTranslator]: Completed translation
[2020-07-19 23:18:45,829 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45 WrapperNode
[2020-07-19 23:18:45,829 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-19 23:18:45,830 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-19 23:18:45,830 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-19 23:18:45,830 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-19 23:18:45,845 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45" (1/1) ...
[2020-07-19 23:18:45,845 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45" (1/1) ...
[2020-07-19 23:18:45,855 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45" (1/1) ...
[2020-07-19 23:18:45,856 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45" (1/1) ...
[2020-07-19 23:18:45,869 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45" (1/1) ...
[2020-07-19 23:18:45,885 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45" (1/1) ...
[2020-07-19 23:18:45,889 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45" (1/1) ...
[2020-07-19 23:18:45,894 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-19 23:18:45,894 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-19 23:18:45,895 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-19 23:18:45,895 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-19 23:18:45,896 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-19 23:18:45,968 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-19 23:18:45,968 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-19 23:18:45,968 INFO  L138     BoogieDeclarations]: Found implementation of procedure ssl3_accept
[2020-07-19 23:18:45,968 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-19 23:18:45,969 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-19 23:18:45,969 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-07-19 23:18:45,969 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-19 23:18:45,969 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long
[2020-07-19 23:18:45,969 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong
[2020-07-19 23:18:45,969 INFO  L130     BoogieDeclarations]: Found specification of procedure ssl3_accept
[2020-07-19 23:18:45,970 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-19 23:18:45,970 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-19 23:18:45,970 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-19 23:18:46,186 WARN  L775   $ProcedureCfgBuilder]: Label in the middle of a codeblock.
[2020-07-19 23:18:46,876 INFO  L728   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false;
[2020-07-19 23:18:46,877 INFO  L728   $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false;
[2020-07-19 23:18:46,888 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-19 23:18:46,889 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-19 23:18:46,894 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:18:46 BoogieIcfgContainer
[2020-07-19 23:18:46,895 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-19 23:18:46,896 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-19 23:18:46,896 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-19 23:18:46,899 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-19 23:18:46,900 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:18:45" (1/3) ...
[2020-07-19 23:18:46,901 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2480f86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:18:46, skipping insertion in model container
[2020-07-19 23:18:46,901 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:45" (2/3) ...
[2020-07-19 23:18:46,901 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2480f86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:18:46, skipping insertion in model container
[2020-07-19 23:18:46,902 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:18:46" (3/3) ...
[2020-07-19 23:18:46,904 INFO  L109   eAbstractionObserver]: Analyzing ICFG s3_srvr_12.cil.c
[2020-07-19 23:18:46,915 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-07-19 23:18:46,923 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-19 23:18:46,937 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-19 23:18:46,964 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-19 23:18:46,965 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-19 23:18:46,965 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-07-19 23:18:46,965 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-19 23:18:46,965 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-19 23:18:46,965 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-19 23:18:46,966 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-19 23:18:46,966 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-19 23:18:46,990 INFO  L276                IsEmpty]: Start isEmpty. Operand 175 states.
[2020-07-19 23:18:46,999 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-07-19 23:18:46,999 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:47,000 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:47,001 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:47,007 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:47,007 INFO  L82        PathProgramCache]: Analyzing trace with hash -1312867208, now seen corresponding path program 1 times
[2020-07-19 23:18:47,015 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:47,015 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501370723]
[2020-07-19 23:18:47,016 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:47,156 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:47,322 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:47,338 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:47,339 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501370723]
[2020-07-19 23:18:47,340 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:47,341 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:47,342 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551358122]
[2020-07-19 23:18:47,348 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:47,348 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:47,363 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:47,364 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:47,367 INFO  L87              Difference]: Start difference. First operand 175 states. Second operand 5 states.
[2020-07-19 23:18:47,712 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:47,713 INFO  L93              Difference]: Finished difference Result 362 states and 623 transitions.
[2020-07-19 23:18:47,713 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:47,715 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 33
[2020-07-19 23:18:47,715 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:47,729 INFO  L225             Difference]: With dead ends: 362
[2020-07-19 23:18:47,729 INFO  L226             Difference]: Without dead ends: 179
[2020-07-19 23:18:47,734 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
[2020-07-19 23:18:47,753 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 179 states.
[2020-07-19 23:18:47,795 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177.
[2020-07-19 23:18:47,796 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 177 states.
[2020-07-19 23:18:47,799 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 282 transitions.
[2020-07-19 23:18:47,801 INFO  L78                 Accepts]: Start accepts. Automaton has 177 states and 282 transitions. Word has length 33
[2020-07-19 23:18:47,801 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:47,801 INFO  L479      AbstractCegarLoop]: Abstraction has 177 states and 282 transitions.
[2020-07-19 23:18:47,802 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:47,802 INFO  L276                IsEmpty]: Start isEmpty. Operand 177 states and 282 transitions.
[2020-07-19 23:18:47,804 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-07-19 23:18:47,804 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:47,804 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]
[2020-07-19 23:18:47,805 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-07-19 23:18:47,805 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:47,805 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:47,806 INFO  L82        PathProgramCache]: Analyzing trace with hash -564854069, now seen corresponding path program 1 times
[2020-07-19 23:18:47,806 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:47,806 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676633345]
[2020-07-19 23:18:47,806 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:47,837 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:47,913 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:47,919 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:47,919 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676633345]
[2020-07-19 23:18:47,920 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:47,920 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:47,920 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202028870]
[2020-07-19 23:18:47,925 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:47,926 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:47,927 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:47,927 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:47,927 INFO  L87              Difference]: Start difference. First operand 177 states and 282 transitions. Second operand 5 states.
[2020-07-19 23:18:48,213 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:48,214 INFO  L93              Difference]: Finished difference Result 363 states and 580 transitions.
[2020-07-19 23:18:48,216 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:48,216 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 34
[2020-07-19 23:18:48,217 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:48,219 INFO  L225             Difference]: With dead ends: 363
[2020-07-19 23:18:48,219 INFO  L226             Difference]: Without dead ends: 199
[2020-07-19 23:18:48,224 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
[2020-07-19 23:18:48,226 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 199 states.
[2020-07-19 23:18:48,259 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199.
[2020-07-19 23:18:48,260 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 199 states.
[2020-07-19 23:18:48,263 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 312 transitions.
[2020-07-19 23:18:48,263 INFO  L78                 Accepts]: Start accepts. Automaton has 199 states and 312 transitions. Word has length 34
[2020-07-19 23:18:48,264 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:48,264 INFO  L479      AbstractCegarLoop]: Abstraction has 199 states and 312 transitions.
[2020-07-19 23:18:48,264 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:48,264 INFO  L276                IsEmpty]: Start isEmpty. Operand 199 states and 312 transitions.
[2020-07-19 23:18:48,268 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-07-19 23:18:48,268 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:48,269 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]
[2020-07-19 23:18:48,269 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-07-19 23:18:48,269 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:48,269 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:48,270 INFO  L82        PathProgramCache]: Analyzing trace with hash -2005409376, now seen corresponding path program 1 times
[2020-07-19 23:18:48,270 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:48,270 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946411686]
[2020-07-19 23:18:48,272 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:48,324 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:48,401 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:48,404 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:48,404 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946411686]
[2020-07-19 23:18:48,405 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:48,405 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:48,405 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523013268]
[2020-07-19 23:18:48,406 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:48,406 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:48,406 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:48,407 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:48,407 INFO  L87              Difference]: Start difference. First operand 199 states and 312 transitions. Second operand 5 states.
[2020-07-19 23:18:48,643 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:48,643 INFO  L93              Difference]: Finished difference Result 393 states and 621 transitions.
[2020-07-19 23:18:48,644 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:48,645 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 34
[2020-07-19 23:18:48,645 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:48,649 INFO  L225             Difference]: With dead ends: 393
[2020-07-19 23:18:48,650 INFO  L226             Difference]: Without dead ends: 207
[2020-07-19 23:18:48,651 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
[2020-07-19 23:18:48,655 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 207 states.
[2020-07-19 23:18:48,686 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205.
[2020-07-19 23:18:48,686 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 205 states.
[2020-07-19 23:18:48,688 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 323 transitions.
[2020-07-19 23:18:48,688 INFO  L78                 Accepts]: Start accepts. Automaton has 205 states and 323 transitions. Word has length 34
[2020-07-19 23:18:48,689 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:48,689 INFO  L479      AbstractCegarLoop]: Abstraction has 205 states and 323 transitions.
[2020-07-19 23:18:48,690 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:48,690 INFO  L276                IsEmpty]: Start isEmpty. Operand 205 states and 323 transitions.
[2020-07-19 23:18:48,693 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 35
[2020-07-19 23:18:48,694 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:48,694 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]
[2020-07-19 23:18:48,696 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-07-19 23:18:48,697 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:48,697 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:48,698 INFO  L82        PathProgramCache]: Analyzing trace with hash 473070591, now seen corresponding path program 1 times
[2020-07-19 23:18:48,698 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:48,700 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790905633]
[2020-07-19 23:18:48,700 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:48,737 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:48,802 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:48,805 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:48,805 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790905633]
[2020-07-19 23:18:48,806 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:48,806 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:48,806 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345701344]
[2020-07-19 23:18:48,807 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:48,807 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:48,807 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:48,807 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:48,808 INFO  L87              Difference]: Start difference. First operand 205 states and 323 transitions. Second operand 5 states.
[2020-07-19 23:18:49,032 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:49,033 INFO  L93              Difference]: Finished difference Result 398 states and 631 transitions.
[2020-07-19 23:18:49,033 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:49,033 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 34
[2020-07-19 23:18:49,034 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:49,038 INFO  L225             Difference]: With dead ends: 398
[2020-07-19 23:18:49,038 INFO  L226             Difference]: Without dead ends: 206
[2020-07-19 23:18:49,040 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
[2020-07-19 23:18:49,041 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 206 states.
[2020-07-19 23:18:49,063 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206.
[2020-07-19 23:18:49,064 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 206 states.
[2020-07-19 23:18:49,065 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 324 transitions.
[2020-07-19 23:18:49,066 INFO  L78                 Accepts]: Start accepts. Automaton has 206 states and 324 transitions. Word has length 34
[2020-07-19 23:18:49,066 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:49,066 INFO  L479      AbstractCegarLoop]: Abstraction has 206 states and 324 transitions.
[2020-07-19 23:18:49,067 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:49,067 INFO  L276                IsEmpty]: Start isEmpty. Operand 206 states and 324 transitions.
[2020-07-19 23:18:49,069 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 36
[2020-07-19 23:18:49,069 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:49,069 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]
[2020-07-19 23:18:49,070 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-07-19 23:18:49,070 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:49,070 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:49,070 INFO  L82        PathProgramCache]: Analyzing trace with hash 715486203, now seen corresponding path program 1 times
[2020-07-19 23:18:49,071 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:49,071 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188517857]
[2020-07-19 23:18:49,071 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:49,093 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:49,148 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:49,151 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:49,152 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188517857]
[2020-07-19 23:18:49,152 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:49,152 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:49,153 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638859679]
[2020-07-19 23:18:49,154 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:49,154 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:49,155 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:49,155 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:49,155 INFO  L87              Difference]: Start difference. First operand 206 states and 324 transitions. Second operand 5 states.
[2020-07-19 23:18:49,361 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:49,361 INFO  L93              Difference]: Finished difference Result 409 states and 643 transitions.
[2020-07-19 23:18:49,362 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:49,362 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 35
[2020-07-19 23:18:49,363 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:49,364 INFO  L225             Difference]: With dead ends: 409
[2020-07-19 23:18:49,365 INFO  L226             Difference]: Without dead ends: 216
[2020-07-19 23:18:49,366 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
[2020-07-19 23:18:49,367 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 216 states.
[2020-07-19 23:18:49,380 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206.
[2020-07-19 23:18:49,380 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 206 states.
[2020-07-19 23:18:49,382 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 322 transitions.
[2020-07-19 23:18:49,382 INFO  L78                 Accepts]: Start accepts. Automaton has 206 states and 322 transitions. Word has length 35
[2020-07-19 23:18:49,384 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:49,385 INFO  L479      AbstractCegarLoop]: Abstraction has 206 states and 322 transitions.
[2020-07-19 23:18:49,385 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:49,385 INFO  L276                IsEmpty]: Start isEmpty. Operand 206 states and 322 transitions.
[2020-07-19 23:18:49,388 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 37
[2020-07-19 23:18:49,388 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:49,389 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, 1]
[2020-07-19 23:18:49,389 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-07-19 23:18:49,389 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:49,389 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:49,390 INFO  L82        PathProgramCache]: Analyzing trace with hash 1092720099, now seen corresponding path program 1 times
[2020-07-19 23:18:49,390 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:49,390 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401751662]
[2020-07-19 23:18:49,390 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:49,426 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:49,467 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:49,471 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:49,471 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401751662]
[2020-07-19 23:18:49,471 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:49,472 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:49,472 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665460562]
[2020-07-19 23:18:49,472 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:49,472 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:49,473 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:49,473 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:49,473 INFO  L87              Difference]: Start difference. First operand 206 states and 322 transitions. Second operand 5 states.
[2020-07-19 23:18:49,668 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:49,669 INFO  L93              Difference]: Finished difference Result 409 states and 639 transitions.
[2020-07-19 23:18:49,669 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:49,669 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 36
[2020-07-19 23:18:49,670 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:49,671 INFO  L225             Difference]: With dead ends: 409
[2020-07-19 23:18:49,671 INFO  L226             Difference]: Without dead ends: 216
[2020-07-19 23:18:49,672 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
[2020-07-19 23:18:49,673 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 216 states.
[2020-07-19 23:18:49,681 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206.
[2020-07-19 23:18:49,681 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 206 states.
[2020-07-19 23:18:49,683 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 320 transitions.
[2020-07-19 23:18:49,683 INFO  L78                 Accepts]: Start accepts. Automaton has 206 states and 320 transitions. Word has length 36
[2020-07-19 23:18:49,683 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:49,683 INFO  L479      AbstractCegarLoop]: Abstraction has 206 states and 320 transitions.
[2020-07-19 23:18:49,684 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:49,684 INFO  L276                IsEmpty]: Start isEmpty. Operand 206 states and 320 transitions.
[2020-07-19 23:18:49,684 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2020-07-19 23:18:49,685 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:49,685 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, 1, 1]
[2020-07-19 23:18:49,685 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-07-19 23:18:49,685 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:49,685 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:49,686 INFO  L82        PathProgramCache]: Analyzing trace with hash 958823552, now seen corresponding path program 1 times
[2020-07-19 23:18:49,686 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:49,686 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677205624]
[2020-07-19 23:18:49,686 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:49,709 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:49,749 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:49,753 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:49,753 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677205624]
[2020-07-19 23:18:49,754 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:49,754 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:49,754 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638483370]
[2020-07-19 23:18:49,755 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:49,755 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:49,755 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:49,756 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:49,756 INFO  L87              Difference]: Start difference. First operand 206 states and 320 transitions. Second operand 5 states.
[2020-07-19 23:18:49,935 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:49,935 INFO  L93              Difference]: Finished difference Result 409 states and 635 transitions.
[2020-07-19 23:18:49,936 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:49,936 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 37
[2020-07-19 23:18:49,936 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:49,938 INFO  L225             Difference]: With dead ends: 409
[2020-07-19 23:18:49,938 INFO  L226             Difference]: Without dead ends: 216
[2020-07-19 23:18:49,939 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
[2020-07-19 23:18:49,940 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 216 states.
[2020-07-19 23:18:49,950 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 206.
[2020-07-19 23:18:49,950 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 206 states.
[2020-07-19 23:18:49,952 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 318 transitions.
[2020-07-19 23:18:49,952 INFO  L78                 Accepts]: Start accepts. Automaton has 206 states and 318 transitions. Word has length 37
[2020-07-19 23:18:49,952 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:49,952 INFO  L479      AbstractCegarLoop]: Abstraction has 206 states and 318 transitions.
[2020-07-19 23:18:49,952 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:49,953 INFO  L276                IsEmpty]: Start isEmpty. Operand 206 states and 318 transitions.
[2020-07-19 23:18:49,955 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 38
[2020-07-19 23:18:49,955 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:49,955 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, 1, 1]
[2020-07-19 23:18:49,956 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-07-19 23:18:49,956 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:49,956 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:49,956 INFO  L82        PathProgramCache]: Analyzing trace with hash -1433612927, now seen corresponding path program 1 times
[2020-07-19 23:18:49,956 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:49,957 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073969919]
[2020-07-19 23:18:49,957 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:49,977 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:50,048 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:50,052 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:50,052 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073969919]
[2020-07-19 23:18:50,053 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:50,053 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-19 23:18:50,053 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429819434]
[2020-07-19 23:18:50,053 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-19 23:18:50,054 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:50,054 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-19 23:18:50,055 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-07-19 23:18:50,055 INFO  L87              Difference]: Start difference. First operand 206 states and 318 transitions. Second operand 6 states.
[2020-07-19 23:18:50,412 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:50,413 INFO  L93              Difference]: Finished difference Result 605 states and 935 transitions.
[2020-07-19 23:18:50,413 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-19 23:18:50,413 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 37
[2020-07-19 23:18:50,414 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:50,416 INFO  L225             Difference]: With dead ends: 605
[2020-07-19 23:18:50,416 INFO  L226             Difference]: Without dead ends: 412
[2020-07-19 23:18:50,417 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
[2020-07-19 23:18:50,418 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 412 states.
[2020-07-19 23:18:50,436 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 388.
[2020-07-19 23:18:50,436 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 388 states.
[2020-07-19 23:18:50,439 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 600 transitions.
[2020-07-19 23:18:50,439 INFO  L78                 Accepts]: Start accepts. Automaton has 388 states and 600 transitions. Word has length 37
[2020-07-19 23:18:50,439 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:50,439 INFO  L479      AbstractCegarLoop]: Abstraction has 388 states and 600 transitions.
[2020-07-19 23:18:50,440 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-19 23:18:50,440 INFO  L276                IsEmpty]: Start isEmpty. Operand 388 states and 600 transitions.
[2020-07-19 23:18:50,441 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 50
[2020-07-19 23:18:50,441 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:50,441 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:50,441 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-07-19 23:18:50,441 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:50,442 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:50,442 INFO  L82        PathProgramCache]: Analyzing trace with hash 2018661528, now seen corresponding path program 1 times
[2020-07-19 23:18:50,442 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:50,442 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736545738]
[2020-07-19 23:18:50,442 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:50,455 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:50,488 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:50,493 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:50,493 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736545738]
[2020-07-19 23:18:50,493 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:50,494 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:50,494 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730535166]
[2020-07-19 23:18:50,494 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:50,495 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:50,495 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:50,495 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:50,495 INFO  L87              Difference]: Start difference. First operand 388 states and 600 transitions. Second operand 5 states.
[2020-07-19 23:18:50,761 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:50,761 INFO  L93              Difference]: Finished difference Result 847 states and 1329 transitions.
[2020-07-19 23:18:50,763 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:50,763 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 49
[2020-07-19 23:18:50,764 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:50,768 INFO  L225             Difference]: With dead ends: 847
[2020-07-19 23:18:50,768 INFO  L226             Difference]: Without dead ends: 472
[2020-07-19 23:18:50,769 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
[2020-07-19 23:18:50,770 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 472 states.
[2020-07-19 23:18:50,788 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 454.
[2020-07-19 23:18:50,789 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 454 states.
[2020-07-19 23:18:50,791 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 715 transitions.
[2020-07-19 23:18:50,791 INFO  L78                 Accepts]: Start accepts. Automaton has 454 states and 715 transitions. Word has length 49
[2020-07-19 23:18:50,792 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:50,792 INFO  L479      AbstractCegarLoop]: Abstraction has 454 states and 715 transitions.
[2020-07-19 23:18:50,792 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:50,792 INFO  L276                IsEmpty]: Start isEmpty. Operand 454 states and 715 transitions.
[2020-07-19 23:18:50,794 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2020-07-19 23:18:50,794 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:50,795 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:50,795 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-07-19 23:18:50,795 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:50,796 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:50,797 INFO  L82        PathProgramCache]: Analyzing trace with hash 1742182651, now seen corresponding path program 1 times
[2020-07-19 23:18:50,797 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:50,797 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882907926]
[2020-07-19 23:18:50,797 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:50,815 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:50,872 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:50,877 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:50,877 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882907926]
[2020-07-19 23:18:50,878 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:50,878 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:50,878 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924501433]
[2020-07-19 23:18:50,879 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:50,879 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:50,880 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:50,880 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:50,880 INFO  L87              Difference]: Start difference. First operand 454 states and 715 transitions. Second operand 5 states.
[2020-07-19 23:18:51,119 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:51,119 INFO  L93              Difference]: Finished difference Result 936 states and 1487 transitions.
[2020-07-19 23:18:51,120 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:51,120 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 50
[2020-07-19 23:18:51,121 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:51,124 INFO  L225             Difference]: With dead ends: 936
[2020-07-19 23:18:51,124 INFO  L226             Difference]: Without dead ends: 495
[2020-07-19 23:18:51,126 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
[2020-07-19 23:18:51,127 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 495 states.
[2020-07-19 23:18:51,149 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 477.
[2020-07-19 23:18:51,149 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 477 states.
[2020-07-19 23:18:51,152 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 758 transitions.
[2020-07-19 23:18:51,153 INFO  L78                 Accepts]: Start accepts. Automaton has 477 states and 758 transitions. Word has length 50
[2020-07-19 23:18:51,153 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:51,153 INFO  L479      AbstractCegarLoop]: Abstraction has 477 states and 758 transitions.
[2020-07-19 23:18:51,153 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:51,153 INFO  L276                IsEmpty]: Start isEmpty. Operand 477 states and 758 transitions.
[2020-07-19 23:18:51,155 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 62
[2020-07-19 23:18:51,155 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:51,155 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, 1, 1, 1, 1]
[2020-07-19 23:18:51,155 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-07-19 23:18:51,155 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:51,156 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:51,156 INFO  L82        PathProgramCache]: Analyzing trace with hash 928180771, now seen corresponding path program 1 times
[2020-07-19 23:18:51,156 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:51,156 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279738833]
[2020-07-19 23:18:51,157 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:51,172 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:51,209 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:51,215 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-19 23:18:51,215 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279738833]
[2020-07-19 23:18:51,216 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:51,216 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:51,216 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483231428]
[2020-07-19 23:18:51,217 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:51,217 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:51,218 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:51,218 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:51,218 INFO  L87              Difference]: Start difference. First operand 477 states and 758 transitions. Second operand 5 states.
[2020-07-19 23:18:51,472 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:51,472 INFO  L93              Difference]: Finished difference Result 993 states and 1583 transitions.
[2020-07-19 23:18:51,473 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:51,473 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 61
[2020-07-19 23:18:51,473 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:51,491 INFO  L225             Difference]: With dead ends: 993
[2020-07-19 23:18:51,491 INFO  L226             Difference]: Without dead ends: 529
[2020-07-19 23:18:51,493 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
[2020-07-19 23:18:51,494 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 529 states.
[2020-07-19 23:18:51,519 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511.
[2020-07-19 23:18:51,519 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 511 states.
[2020-07-19 23:18:51,522 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 809 transitions.
[2020-07-19 23:18:51,523 INFO  L78                 Accepts]: Start accepts. Automaton has 511 states and 809 transitions. Word has length 61
[2020-07-19 23:18:51,523 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:51,523 INFO  L479      AbstractCegarLoop]: Abstraction has 511 states and 809 transitions.
[2020-07-19 23:18:51,524 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:51,524 INFO  L276                IsEmpty]: Start isEmpty. Operand 511 states and 809 transitions.
[2020-07-19 23:18:51,525 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2020-07-19 23:18:51,525 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:51,526 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, 1, 1, 1, 1, 1]
[2020-07-19 23:18:51,526 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-07-19 23:18:51,526 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:51,527 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:51,527 INFO  L82        PathProgramCache]: Analyzing trace with hash 171040523, now seen corresponding path program 1 times
[2020-07-19 23:18:51,527 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:51,528 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731555668]
[2020-07-19 23:18:51,528 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:51,540 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:51,568 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:51,573 INFO  L134       CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-19 23:18:51,574 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731555668]
[2020-07-19 23:18:51,574 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:51,574 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:51,574 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966392636]
[2020-07-19 23:18:51,575 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:51,575 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:51,575 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:51,575 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:51,576 INFO  L87              Difference]: Start difference. First operand 511 states and 809 transitions. Second operand 5 states.
[2020-07-19 23:18:51,816 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:51,817 INFO  L93              Difference]: Finished difference Result 1027 states and 1631 transitions.
[2020-07-19 23:18:51,817 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:51,817 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 62
[2020-07-19 23:18:51,818 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:51,821 INFO  L225             Difference]: With dead ends: 1027
[2020-07-19 23:18:51,821 INFO  L226             Difference]: Without dead ends: 529
[2020-07-19 23:18:51,822 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
[2020-07-19 23:18:51,823 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 529 states.
[2020-07-19 23:18:51,844 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 511.
[2020-07-19 23:18:51,844 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 511 states.
[2020-07-19 23:18:51,846 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 806 transitions.
[2020-07-19 23:18:51,846 INFO  L78                 Accepts]: Start accepts. Automaton has 511 states and 806 transitions. Word has length 62
[2020-07-19 23:18:51,847 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:51,847 INFO  L479      AbstractCegarLoop]: Abstraction has 511 states and 806 transitions.
[2020-07-19 23:18:51,847 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:51,847 INFO  L276                IsEmpty]: Start isEmpty. Operand 511 states and 806 transitions.
[2020-07-19 23:18:51,848 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 63
[2020-07-19 23:18:51,848 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:51,848 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:51,849 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-07-19 23:18:51,849 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:51,849 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:51,849 INFO  L82        PathProgramCache]: Analyzing trace with hash 2117537729, now seen corresponding path program 1 times
[2020-07-19 23:18:51,850 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:51,850 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007375249]
[2020-07-19 23:18:51,850 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:51,863 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:51,893 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:51,897 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-19 23:18:51,898 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007375249]
[2020-07-19 23:18:51,898 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:51,898 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:51,898 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57191587]
[2020-07-19 23:18:51,899 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:51,899 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:51,899 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:51,899 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:51,900 INFO  L87              Difference]: Start difference. First operand 511 states and 806 transitions. Second operand 5 states.
[2020-07-19 23:18:52,141 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:52,142 INFO  L93              Difference]: Finished difference Result 1074 states and 1702 transitions.
[2020-07-19 23:18:52,142 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:52,142 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 62
[2020-07-19 23:18:52,142 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:52,146 INFO  L225             Difference]: With dead ends: 1074
[2020-07-19 23:18:52,146 INFO  L226             Difference]: Without dead ends: 576
[2020-07-19 23:18:52,147 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
[2020-07-19 23:18:52,148 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 576 states.
[2020-07-19 23:18:52,173 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 574.
[2020-07-19 23:18:52,174 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 574 states.
[2020-07-19 23:18:52,176 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 903 transitions.
[2020-07-19 23:18:52,176 INFO  L78                 Accepts]: Start accepts. Automaton has 574 states and 903 transitions. Word has length 62
[2020-07-19 23:18:52,176 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:52,177 INFO  L479      AbstractCegarLoop]: Abstraction has 574 states and 903 transitions.
[2020-07-19 23:18:52,177 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:52,177 INFO  L276                IsEmpty]: Start isEmpty. Operand 574 states and 903 transitions.
[2020-07-19 23:18:52,178 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 85
[2020-07-19 23:18:52,178 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:52,179 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:52,179 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-07-19 23:18:52,179 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:52,179 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:52,179 INFO  L82        PathProgramCache]: Analyzing trace with hash 1816844012, now seen corresponding path program 1 times
[2020-07-19 23:18:52,180 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:52,180 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569113877]
[2020-07-19 23:18:52,180 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:52,192 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:52,222 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:52,229 INFO  L134       CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:52,230 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569113877]
[2020-07-19 23:18:52,230 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:52,230 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:52,230 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424153357]
[2020-07-19 23:18:52,231 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:52,231 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:52,231 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:52,231 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:52,232 INFO  L87              Difference]: Start difference. First operand 574 states and 903 transitions. Second operand 5 states.
[2020-07-19 23:18:52,547 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:52,547 INFO  L93              Difference]: Finished difference Result 1184 states and 1864 transitions.
[2020-07-19 23:18:52,548 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:52,548 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 84
[2020-07-19 23:18:52,548 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:52,553 INFO  L225             Difference]: With dead ends: 1184
[2020-07-19 23:18:52,553 INFO  L226             Difference]: Without dead ends: 623
[2020-07-19 23:18:52,556 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
[2020-07-19 23:18:52,557 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 623 states.
[2020-07-19 23:18:52,592 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617.
[2020-07-19 23:18:52,592 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 617 states.
[2020-07-19 23:18:52,594 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 967 transitions.
[2020-07-19 23:18:52,595 INFO  L78                 Accepts]: Start accepts. Automaton has 617 states and 967 transitions. Word has length 84
[2020-07-19 23:18:52,595 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:52,595 INFO  L479      AbstractCegarLoop]: Abstraction has 617 states and 967 transitions.
[2020-07-19 23:18:52,595 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:52,596 INFO  L276                IsEmpty]: Start isEmpty. Operand 617 states and 967 transitions.
[2020-07-19 23:18:52,599 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2020-07-19 23:18:52,599 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:52,599 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:52,600 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2020-07-19 23:18:52,600 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:52,600 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:52,600 INFO  L82        PathProgramCache]: Analyzing trace with hash -584276215, now seen corresponding path program 1 times
[2020-07-19 23:18:52,601 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:52,602 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986458414]
[2020-07-19 23:18:52,602 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:52,624 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:52,691 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:52,699 INFO  L134       CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-19 23:18:52,700 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986458414]
[2020-07-19 23:18:52,700 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:52,700 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:52,700 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957453266]
[2020-07-19 23:18:52,701 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:52,701 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:52,701 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:52,701 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:52,702 INFO  L87              Difference]: Start difference. First operand 617 states and 967 transitions. Second operand 5 states.
[2020-07-19 23:18:53,077 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:53,077 INFO  L93              Difference]: Finished difference Result 1227 states and 1925 transitions.
[2020-07-19 23:18:53,078 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:53,078 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 85
[2020-07-19 23:18:53,078 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:53,081 INFO  L225             Difference]: With dead ends: 1227
[2020-07-19 23:18:53,082 INFO  L226             Difference]: Without dead ends: 623
[2020-07-19 23:18:53,086 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
[2020-07-19 23:18:53,088 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 623 states.
[2020-07-19 23:18:53,125 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 617.
[2020-07-19 23:18:53,125 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 617 states.
[2020-07-19 23:18:53,128 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 964 transitions.
[2020-07-19 23:18:53,129 INFO  L78                 Accepts]: Start accepts. Automaton has 617 states and 964 transitions. Word has length 85
[2020-07-19 23:18:53,129 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:53,129 INFO  L479      AbstractCegarLoop]: Abstraction has 617 states and 964 transitions.
[2020-07-19 23:18:53,129 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:53,129 INFO  L276                IsEmpty]: Start isEmpty. Operand 617 states and 964 transitions.
[2020-07-19 23:18:53,131 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 91
[2020-07-19 23:18:53,132 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:53,132 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:53,132 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2020-07-19 23:18:53,132 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:53,133 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:53,133 INFO  L82        PathProgramCache]: Analyzing trace with hash 220190302, now seen corresponding path program 1 times
[2020-07-19 23:18:53,133 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:53,134 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108027932]
[2020-07-19 23:18:53,134 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:53,156 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:53,215 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:53,223 INFO  L134       CoverageAnalysis]: Checked inductivity of 46 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-19 23:18:53,223 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108027932]
[2020-07-19 23:18:53,225 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:53,226 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:53,226 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124647443]
[2020-07-19 23:18:53,226 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:53,227 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:53,227 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:53,227 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:53,227 INFO  L87              Difference]: Start difference. First operand 617 states and 964 transitions. Second operand 5 states.
[2020-07-19 23:18:53,485 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:53,485 INFO  L93              Difference]: Finished difference Result 1223 states and 1913 transitions.
[2020-07-19 23:18:53,486 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:53,486 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 90
[2020-07-19 23:18:53,487 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:53,491 INFO  L225             Difference]: With dead ends: 1223
[2020-07-19 23:18:53,491 INFO  L226             Difference]: Without dead ends: 619
[2020-07-19 23:18:53,493 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
[2020-07-19 23:18:53,494 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 619 states.
[2020-07-19 23:18:53,529 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617.
[2020-07-19 23:18:53,529 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 617 states.
[2020-07-19 23:18:53,532 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 959 transitions.
[2020-07-19 23:18:53,532 INFO  L78                 Accepts]: Start accepts. Automaton has 617 states and 959 transitions. Word has length 90
[2020-07-19 23:18:53,533 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:53,533 INFO  L479      AbstractCegarLoop]: Abstraction has 617 states and 959 transitions.
[2020-07-19 23:18:53,533 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:53,533 INFO  L276                IsEmpty]: Start isEmpty. Operand 617 states and 959 transitions.
[2020-07-19 23:18:53,535 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 99
[2020-07-19 23:18:53,536 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:53,536 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:53,536 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2020-07-19 23:18:53,537 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:53,537 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:53,537 INFO  L82        PathProgramCache]: Analyzing trace with hash -1890073075, now seen corresponding path program 1 times
[2020-07-19 23:18:53,538 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:53,538 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913926004]
[2020-07-19 23:18:53,538 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:53,554 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:53,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:53,597 INFO  L134       CoverageAnalysis]: Checked inductivity of 63 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2020-07-19 23:18:53,598 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913926004]
[2020-07-19 23:18:53,598 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:53,598 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:53,599 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418464611]
[2020-07-19 23:18:53,599 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:53,599 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:53,600 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:53,600 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:53,600 INFO  L87              Difference]: Start difference. First operand 617 states and 959 transitions. Second operand 5 states.
[2020-07-19 23:18:53,837 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:53,837 INFO  L93              Difference]: Finished difference Result 1281 states and 1996 transitions.
[2020-07-19 23:18:53,838 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:53,838 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 98
[2020-07-19 23:18:53,838 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:53,842 INFO  L225             Difference]: With dead ends: 1281
[2020-07-19 23:18:53,842 INFO  L226             Difference]: Without dead ends: 677
[2020-07-19 23:18:53,844 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
[2020-07-19 23:18:53,845 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 677 states.
[2020-07-19 23:18:53,878 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649.
[2020-07-19 23:18:53,878 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 649 states.
[2020-07-19 23:18:53,881 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 1002 transitions.
[2020-07-19 23:18:53,881 INFO  L78                 Accepts]: Start accepts. Automaton has 649 states and 1002 transitions. Word has length 98
[2020-07-19 23:18:53,881 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:53,881 INFO  L479      AbstractCegarLoop]: Abstraction has 649 states and 1002 transitions.
[2020-07-19 23:18:53,881 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:53,882 INFO  L276                IsEmpty]: Start isEmpty. Operand 649 states and 1002 transitions.
[2020-07-19 23:18:53,883 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 100
[2020-07-19 23:18:53,884 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:53,884 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:53,884 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2020-07-19 23:18:53,884 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:53,885 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:53,885 INFO  L82        PathProgramCache]: Analyzing trace with hash -90077499, now seen corresponding path program 1 times
[2020-07-19 23:18:53,885 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:53,885 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257709636]
[2020-07-19 23:18:53,886 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:53,897 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:53,929 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:53,937 INFO  L134       CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked.
[2020-07-19 23:18:53,937 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257709636]
[2020-07-19 23:18:53,937 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:53,937 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:53,938 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771337041]
[2020-07-19 23:18:53,938 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:53,938 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:53,939 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:53,939 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:53,939 INFO  L87              Difference]: Start difference. First operand 649 states and 1002 transitions. Second operand 5 states.
[2020-07-19 23:18:54,184 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:54,185 INFO  L93              Difference]: Finished difference Result 1313 states and 2033 transitions.
[2020-07-19 23:18:54,185 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:54,185 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 99
[2020-07-19 23:18:54,185 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:54,189 INFO  L225             Difference]: With dead ends: 1313
[2020-07-19 23:18:54,189 INFO  L226             Difference]: Without dead ends: 677
[2020-07-19 23:18:54,191 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
[2020-07-19 23:18:54,192 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 677 states.
[2020-07-19 23:18:54,225 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 649.
[2020-07-19 23:18:54,225 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 649 states.
[2020-07-19 23:18:54,227 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 996 transitions.
[2020-07-19 23:18:54,228 INFO  L78                 Accepts]: Start accepts. Automaton has 649 states and 996 transitions. Word has length 99
[2020-07-19 23:18:54,228 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:54,228 INFO  L479      AbstractCegarLoop]: Abstraction has 649 states and 996 transitions.
[2020-07-19 23:18:54,228 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:54,229 INFO  L276                IsEmpty]: Start isEmpty. Operand 649 states and 996 transitions.
[2020-07-19 23:18:54,230 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 106
[2020-07-19 23:18:54,231 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:54,231 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:54,231 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2020-07-19 23:18:54,232 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:54,232 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:54,232 INFO  L82        PathProgramCache]: Analyzing trace with hash -1708621622, now seen corresponding path program 1 times
[2020-07-19 23:18:54,232 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:54,232 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62954936]
[2020-07-19 23:18:54,233 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:54,244 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:54,275 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:54,301 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-19 23:18:54,301 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62954936]
[2020-07-19 23:18:54,302 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:54,302 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:54,302 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92433435]
[2020-07-19 23:18:54,303 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:54,303 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:54,303 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:54,303 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:54,304 INFO  L87              Difference]: Start difference. First operand 649 states and 996 transitions. Second operand 5 states.
[2020-07-19 23:18:54,622 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:54,622 INFO  L93              Difference]: Finished difference Result 1349 states and 2073 transitions.
[2020-07-19 23:18:54,623 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:54,624 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 105
[2020-07-19 23:18:54,624 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:54,629 INFO  L225             Difference]: With dead ends: 1349
[2020-07-19 23:18:54,630 INFO  L226             Difference]: Without dead ends: 713
[2020-07-19 23:18:54,632 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
[2020-07-19 23:18:54,634 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 713 states.
[2020-07-19 23:18:54,692 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 701.
[2020-07-19 23:18:54,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 701 states.
[2020-07-19 23:18:54,696 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 701 states to 701 states and 1072 transitions.
[2020-07-19 23:18:54,697 INFO  L78                 Accepts]: Start accepts. Automaton has 701 states and 1072 transitions. Word has length 105
[2020-07-19 23:18:54,697 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:54,697 INFO  L479      AbstractCegarLoop]: Abstraction has 701 states and 1072 transitions.
[2020-07-19 23:18:54,698 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:54,698 INFO  L276                IsEmpty]: Start isEmpty. Operand 701 states and 1072 transitions.
[2020-07-19 23:18:54,701 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 107
[2020-07-19 23:18:54,701 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:54,702 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:54,702 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18
[2020-07-19 23:18:54,702 INFO  L427      AbstractCegarLoop]: === Iteration 20 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:54,703 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:54,703 INFO  L82        PathProgramCache]: Analyzing trace with hash 2058755821, now seen corresponding path program 1 times
[2020-07-19 23:18:54,703 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:54,704 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694763942]
[2020-07-19 23:18:54,704 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:54,720 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:54,765 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:54,785 INFO  L134       CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-19 23:18:54,786 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694763942]
[2020-07-19 23:18:54,786 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:54,786 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:54,787 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843426558]
[2020-07-19 23:18:54,787 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:54,788 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:54,788 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:54,788 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:54,789 INFO  L87              Difference]: Start difference. First operand 701 states and 1072 transitions. Second operand 5 states.
[2020-07-19 23:18:55,128 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:55,129 INFO  L93              Difference]: Finished difference Result 1406 states and 2155 transitions.
[2020-07-19 23:18:55,129 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:55,130 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 106
[2020-07-19 23:18:55,130 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:55,135 INFO  L225             Difference]: With dead ends: 1406
[2020-07-19 23:18:55,136 INFO  L226             Difference]: Without dead ends: 714
[2020-07-19 23:18:55,138 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
[2020-07-19 23:18:55,140 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 714 states.
[2020-07-19 23:18:55,203 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 702.
[2020-07-19 23:18:55,203 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 702 states.
[2020-07-19 23:18:55,207 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 702 states to 702 states and 1073 transitions.
[2020-07-19 23:18:55,208 INFO  L78                 Accepts]: Start accepts. Automaton has 702 states and 1073 transitions. Word has length 106
[2020-07-19 23:18:55,208 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:55,208 INFO  L479      AbstractCegarLoop]: Abstraction has 702 states and 1073 transitions.
[2020-07-19 23:18:55,208 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:55,209 INFO  L276                IsEmpty]: Start isEmpty. Operand 702 states and 1073 transitions.
[2020-07-19 23:18:55,211 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 118
[2020-07-19 23:18:55,212 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:55,212 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2020-07-19 23:18:55,212 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19
[2020-07-19 23:18:55,213 INFO  L427      AbstractCegarLoop]: === Iteration 21 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:55,213 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:55,213 INFO  L82        PathProgramCache]: Analyzing trace with hash 646120304, now seen corresponding path program 1 times
[2020-07-19 23:18:55,214 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:55,214 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388366630]
[2020-07-19 23:18:55,214 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:55,231 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:55,290 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:55,309 INFO  L134       CoverageAnalysis]: Checked inductivity of 86 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked.
[2020-07-19 23:18:55,311 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388366630]
[2020-07-19 23:18:55,313 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:55,313 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:55,313 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792005618]
[2020-07-19 23:18:55,314 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:55,314 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:55,316 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:55,316 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:55,317 INFO  L87              Difference]: Start difference. First operand 702 states and 1073 transitions. Second operand 5 states.
[2020-07-19 23:18:55,620 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:55,620 INFO  L93              Difference]: Finished difference Result 1438 states and 2197 transitions.
[2020-07-19 23:18:55,621 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:55,621 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 117
[2020-07-19 23:18:55,621 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:55,625 INFO  L225             Difference]: With dead ends: 1438
[2020-07-19 23:18:55,625 INFO  L226             Difference]: Without dead ends: 749
[2020-07-19 23:18:55,630 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
[2020-07-19 23:18:55,631 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 749 states.
[2020-07-19 23:18:55,669 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743.
[2020-07-19 23:18:55,669 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 743 states.
[2020-07-19 23:18:55,672 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1128 transitions.
[2020-07-19 23:18:55,672 INFO  L78                 Accepts]: Start accepts. Automaton has 743 states and 1128 transitions. Word has length 117
[2020-07-19 23:18:55,672 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:55,672 INFO  L479      AbstractCegarLoop]: Abstraction has 743 states and 1128 transitions.
[2020-07-19 23:18:55,672 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:55,672 INFO  L276                IsEmpty]: Start isEmpty. Operand 743 states and 1128 transitions.
[2020-07-19 23:18:55,674 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 119
[2020-07-19 23:18:55,674 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:55,675 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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]
[2020-07-19 23:18:55,675 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20
[2020-07-19 23:18:55,675 INFO  L427      AbstractCegarLoop]: === Iteration 22 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:55,675 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:55,675 INFO  L82        PathProgramCache]: Analyzing trace with hash 820078483, now seen corresponding path program 1 times
[2020-07-19 23:18:55,676 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:55,676 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148841439]
[2020-07-19 23:18:55,676 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:55,691 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:55,738 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:55,749 INFO  L134       CoverageAnalysis]: Checked inductivity of 88 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked.
[2020-07-19 23:18:55,751 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148841439]
[2020-07-19 23:18:55,751 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:55,751 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:55,751 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739652784]
[2020-07-19 23:18:55,752 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:55,752 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:55,752 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:55,752 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:55,753 INFO  L87              Difference]: Start difference. First operand 743 states and 1128 transitions. Second operand 5 states.
[2020-07-19 23:18:56,006 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:56,007 INFO  L93              Difference]: Finished difference Result 1479 states and 2247 transitions.
[2020-07-19 23:18:56,008 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:56,008 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 118
[2020-07-19 23:18:56,009 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:56,012 INFO  L225             Difference]: With dead ends: 1479
[2020-07-19 23:18:56,012 INFO  L226             Difference]: Without dead ends: 749
[2020-07-19 23:18:56,015 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
[2020-07-19 23:18:56,016 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 749 states.
[2020-07-19 23:18:56,050 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 743.
[2020-07-19 23:18:56,051 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 743 states.
[2020-07-19 23:18:56,060 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1123 transitions.
[2020-07-19 23:18:56,060 INFO  L78                 Accepts]: Start accepts. Automaton has 743 states and 1123 transitions. Word has length 118
[2020-07-19 23:18:56,061 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:56,061 INFO  L479      AbstractCegarLoop]: Abstraction has 743 states and 1123 transitions.
[2020-07-19 23:18:56,061 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:56,061 INFO  L276                IsEmpty]: Start isEmpty. Operand 743 states and 1123 transitions.
[2020-07-19 23:18:56,065 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 121
[2020-07-19 23:18:56,065 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:56,065 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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]
[2020-07-19 23:18:56,065 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21
[2020-07-19 23:18:56,066 INFO  L427      AbstractCegarLoop]: === Iteration 23 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:56,066 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:56,066 INFO  L82        PathProgramCache]: Analyzing trace with hash -1832218007, now seen corresponding path program 1 times
[2020-07-19 23:18:56,066 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:56,068 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879124281]
[2020-07-19 23:18:56,068 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:56,081 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:56,123 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:56,136 INFO  L134       CoverageAnalysis]: Checked inductivity of 119 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked.
[2020-07-19 23:18:56,142 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879124281]
[2020-07-19 23:18:56,142 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:56,143 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:56,144 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769130014]
[2020-07-19 23:18:56,144 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:56,147 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:56,147 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:56,147 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:56,147 INFO  L87              Difference]: Start difference. First operand 743 states and 1123 transitions. Second operand 5 states.
[2020-07-19 23:18:56,375 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:56,376 INFO  L93              Difference]: Finished difference Result 1515 states and 2290 transitions.
[2020-07-19 23:18:56,376 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:56,376 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 120
[2020-07-19 23:18:56,376 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:56,380 INFO  L225             Difference]: With dead ends: 1515
[2020-07-19 23:18:56,380 INFO  L226             Difference]: Without dead ends: 785
[2020-07-19 23:18:56,382 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
[2020-07-19 23:18:56,383 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 785 states.
[2020-07-19 23:18:56,415 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775.
[2020-07-19 23:18:56,415 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 775 states.
[2020-07-19 23:18:56,417 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1161 transitions.
[2020-07-19 23:18:56,417 INFO  L78                 Accepts]: Start accepts. Automaton has 775 states and 1161 transitions. Word has length 120
[2020-07-19 23:18:56,417 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:56,417 INFO  L479      AbstractCegarLoop]: Abstraction has 775 states and 1161 transitions.
[2020-07-19 23:18:56,417 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:56,417 INFO  L276                IsEmpty]: Start isEmpty. Operand 775 states and 1161 transitions.
[2020-07-19 23:18:56,419 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 122
[2020-07-19 23:18:56,419 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:56,419 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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]
[2020-07-19 23:18:56,419 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22
[2020-07-19 23:18:56,420 INFO  L427      AbstractCegarLoop]: === Iteration 24 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:56,420 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:56,420 INFO  L82        PathProgramCache]: Analyzing trace with hash 2144394689, now seen corresponding path program 1 times
[2020-07-19 23:18:56,421 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:56,421 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915773091]
[2020-07-19 23:18:56,421 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:56,452 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:56,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:56,544 INFO  L134       CoverageAnalysis]: Checked inductivity of 122 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked.
[2020-07-19 23:18:56,545 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915773091]
[2020-07-19 23:18:56,545 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:56,546 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:56,546 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280762206]
[2020-07-19 23:18:56,546 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:56,547 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:56,547 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:56,547 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:56,548 INFO  L87              Difference]: Start difference. First operand 775 states and 1161 transitions. Second operand 5 states.
[2020-07-19 23:18:56,885 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:56,886 INFO  L93              Difference]: Finished difference Result 1547 states and 2319 transitions.
[2020-07-19 23:18:56,886 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:56,887 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 121
[2020-07-19 23:18:56,887 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:56,892 INFO  L225             Difference]: With dead ends: 1547
[2020-07-19 23:18:56,892 INFO  L226             Difference]: Without dead ends: 785
[2020-07-19 23:18:56,895 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
[2020-07-19 23:18:56,896 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 785 states.
[2020-07-19 23:18:56,970 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 775.
[2020-07-19 23:18:56,970 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 775 states.
[2020-07-19 23:18:56,973 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 1152 transitions.
[2020-07-19 23:18:56,973 INFO  L78                 Accepts]: Start accepts. Automaton has 775 states and 1152 transitions. Word has length 121
[2020-07-19 23:18:56,974 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:56,974 INFO  L479      AbstractCegarLoop]: Abstraction has 775 states and 1152 transitions.
[2020-07-19 23:18:56,974 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:56,974 INFO  L276                IsEmpty]: Start isEmpty. Operand 775 states and 1152 transitions.
[2020-07-19 23:18:56,978 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 143
[2020-07-19 23:18:56,979 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:56,979 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1]
[2020-07-19 23:18:56,980 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23
[2020-07-19 23:18:56,980 INFO  L427      AbstractCegarLoop]: === Iteration 25 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:56,980 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:56,980 INFO  L82        PathProgramCache]: Analyzing trace with hash -40343791, now seen corresponding path program 1 times
[2020-07-19 23:18:56,981 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:56,981 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370425250]
[2020-07-19 23:18:56,981 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:57,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:57,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:57,085 INFO  L134       CoverageAnalysis]: Checked inductivity of 186 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked.
[2020-07-19 23:18:57,086 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370425250]
[2020-07-19 23:18:57,086 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:57,087 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:57,087 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867380632]
[2020-07-19 23:18:57,087 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:57,088 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:57,088 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:57,088 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:57,089 INFO  L87              Difference]: Start difference. First operand 775 states and 1152 transitions. Second operand 5 states.
[2020-07-19 23:18:57,410 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:57,411 INFO  L93              Difference]: Finished difference Result 1573 states and 2340 transitions.
[2020-07-19 23:18:57,411 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:57,412 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 142
[2020-07-19 23:18:57,412 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:57,418 INFO  L225             Difference]: With dead ends: 1573
[2020-07-19 23:18:57,418 INFO  L226             Difference]: Without dead ends: 811
[2020-07-19 23:18:57,421 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
[2020-07-19 23:18:57,423 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 811 states.
[2020-07-19 23:18:57,488 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803.
[2020-07-19 23:18:57,489 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 803 states.
[2020-07-19 23:18:57,492 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1183 transitions.
[2020-07-19 23:18:57,492 INFO  L78                 Accepts]: Start accepts. Automaton has 803 states and 1183 transitions. Word has length 142
[2020-07-19 23:18:57,492 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:57,493 INFO  L479      AbstractCegarLoop]: Abstraction has 803 states and 1183 transitions.
[2020-07-19 23:18:57,493 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:57,493 INFO  L276                IsEmpty]: Start isEmpty. Operand 803 states and 1183 transitions.
[2020-07-19 23:18:57,497 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 144
[2020-07-19 23:18:57,497 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:57,498 INFO  L422         BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1]
[2020-07-19 23:18:57,498 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24
[2020-07-19 23:18:57,498 INFO  L427      AbstractCegarLoop]: === Iteration 26 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:57,503 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:57,503 INFO  L82        PathProgramCache]: Analyzing trace with hash -46422775, now seen corresponding path program 1 times
[2020-07-19 23:18:57,503 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:57,504 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31645131]
[2020-07-19 23:18:57,504 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:57,528 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:57,574 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:57,600 INFO  L134       CoverageAnalysis]: Checked inductivity of 190 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked.
[2020-07-19 23:18:57,600 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31645131]
[2020-07-19 23:18:57,601 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:57,601 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:57,601 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893052513]
[2020-07-19 23:18:57,602 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:57,603 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:57,603 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:57,603 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:57,604 INFO  L87              Difference]: Start difference. First operand 803 states and 1183 transitions. Second operand 5 states.
[2020-07-19 23:18:57,962 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:57,962 INFO  L93              Difference]: Finished difference Result 1601 states and 2361 transitions.
[2020-07-19 23:18:57,963 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:57,963 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 143
[2020-07-19 23:18:57,963 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:57,968 INFO  L225             Difference]: With dead ends: 1601
[2020-07-19 23:18:57,968 INFO  L226             Difference]: Without dead ends: 811
[2020-07-19 23:18:57,970 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
[2020-07-19 23:18:57,974 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 811 states.
[2020-07-19 23:18:58,041 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 803.
[2020-07-19 23:18:58,042 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 803 states.
[2020-07-19 23:18:58,044 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1173 transitions.
[2020-07-19 23:18:58,044 INFO  L78                 Accepts]: Start accepts. Automaton has 803 states and 1173 transitions. Word has length 143
[2020-07-19 23:18:58,044 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:58,044 INFO  L479      AbstractCegarLoop]: Abstraction has 803 states and 1173 transitions.
[2020-07-19 23:18:58,045 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:58,045 INFO  L276                IsEmpty]: Start isEmpty. Operand 803 states and 1173 transitions.
[2020-07-19 23:18:58,048 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 147
[2020-07-19 23:18:58,048 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:58,048 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:58,048 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25
[2020-07-19 23:18:58,048 INFO  L427      AbstractCegarLoop]: === Iteration 27 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:58,050 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:58,050 INFO  L82        PathProgramCache]: Analyzing trace with hash -1282567469, now seen corresponding path program 1 times
[2020-07-19 23:18:58,050 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:58,050 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032976674]
[2020-07-19 23:18:58,050 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:58,062 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:58,109 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:58,125 INFO  L134       CoverageAnalysis]: Checked inductivity of 120 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked.
[2020-07-19 23:18:58,125 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032976674]
[2020-07-19 23:18:58,125 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:58,126 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:58,126 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644340706]
[2020-07-19 23:18:58,126 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:58,126 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:58,127 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:58,127 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:58,127 INFO  L87              Difference]: Start difference. First operand 803 states and 1173 transitions. Second operand 5 states.
[2020-07-19 23:18:58,382 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:58,383 INFO  L93              Difference]: Finished difference Result 1656 states and 2415 transitions.
[2020-07-19 23:18:58,383 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:58,383 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 146
[2020-07-19 23:18:58,383 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:58,387 INFO  L225             Difference]: With dead ends: 1656
[2020-07-19 23:18:58,388 INFO  L226             Difference]: Without dead ends: 866
[2020-07-19 23:18:58,389 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
[2020-07-19 23:18:58,390 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 866 states.
[2020-07-19 23:18:58,433 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 852.
[2020-07-19 23:18:58,433 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 852 states.
[2020-07-19 23:18:58,435 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1234 transitions.
[2020-07-19 23:18:58,435 INFO  L78                 Accepts]: Start accepts. Automaton has 852 states and 1234 transitions. Word has length 146
[2020-07-19 23:18:58,435 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:58,435 INFO  L479      AbstractCegarLoop]: Abstraction has 852 states and 1234 transitions.
[2020-07-19 23:18:58,435 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:58,436 INFO  L276                IsEmpty]: Start isEmpty. Operand 852 states and 1234 transitions.
[2020-07-19 23:18:58,438 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 148
[2020-07-19 23:18:58,438 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:58,438 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:58,439 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26
[2020-07-19 23:18:58,439 INFO  L427      AbstractCegarLoop]: === Iteration 28 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:58,439 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:58,439 INFO  L82        PathProgramCache]: Analyzing trace with hash -399456400, now seen corresponding path program 1 times
[2020-07-19 23:18:58,439 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:58,440 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307262470]
[2020-07-19 23:18:58,440 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:58,450 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:58,481 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:58,496 INFO  L134       CoverageAnalysis]: Checked inductivity of 121 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked.
[2020-07-19 23:18:58,496 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307262470]
[2020-07-19 23:18:58,496 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:58,496 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:58,497 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446619448]
[2020-07-19 23:18:58,497 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:58,497 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:58,498 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:58,498 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:58,498 INFO  L87              Difference]: Start difference. First operand 852 states and 1234 transitions. Second operand 5 states.
[2020-07-19 23:18:58,806 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:58,806 INFO  L93              Difference]: Finished difference Result 1705 states and 2473 transitions.
[2020-07-19 23:18:58,807 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:58,807 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 147
[2020-07-19 23:18:58,808 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:58,813 INFO  L225             Difference]: With dead ends: 1705
[2020-07-19 23:18:58,813 INFO  L226             Difference]: Without dead ends: 850
[2020-07-19 23:18:58,816 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
[2020-07-19 23:18:58,817 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 850 states.
[2020-07-19 23:18:58,873 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 836.
[2020-07-19 23:18:58,873 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 836 states.
[2020-07-19 23:18:58,875 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1211 transitions.
[2020-07-19 23:18:58,875 INFO  L78                 Accepts]: Start accepts. Automaton has 836 states and 1211 transitions. Word has length 147
[2020-07-19 23:18:58,875 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:58,876 INFO  L479      AbstractCegarLoop]: Abstraction has 836 states and 1211 transitions.
[2020-07-19 23:18:58,876 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:58,876 INFO  L276                IsEmpty]: Start isEmpty. Operand 836 states and 1211 transitions.
[2020-07-19 23:18:58,879 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 152
[2020-07-19 23:18:58,879 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:58,879 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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]
[2020-07-19 23:18:58,879 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27
[2020-07-19 23:18:58,879 INFO  L427      AbstractCegarLoop]: === Iteration 29 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:58,880 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:58,880 INFO  L82        PathProgramCache]: Analyzing trace with hash 947927939, now seen corresponding path program 1 times
[2020-07-19 23:18:58,880 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:58,880 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498040910]
[2020-07-19 23:18:58,880 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:58,894 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:58,930 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:58,970 INFO  L134       CoverageAnalysis]: Checked inductivity of 167 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked.
[2020-07-19 23:18:58,971 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498040910]
[2020-07-19 23:18:58,971 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:58,971 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:58,971 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757726129]
[2020-07-19 23:18:58,972 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:58,972 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:58,972 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:58,972 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:58,973 INFO  L87              Difference]: Start difference. First operand 836 states and 1211 transitions. Second operand 5 states.
[2020-07-19 23:18:59,222 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:59,222 INFO  L93              Difference]: Finished difference Result 1671 states and 2423 transitions.
[2020-07-19 23:18:59,223 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:59,223 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 151
[2020-07-19 23:18:59,223 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:59,227 INFO  L225             Difference]: With dead ends: 1671
[2020-07-19 23:18:59,227 INFO  L226             Difference]: Without dead ends: 848
[2020-07-19 23:18:59,229 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
[2020-07-19 23:18:59,230 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 848 states.
[2020-07-19 23:18:59,268 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 836.
[2020-07-19 23:18:59,269 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 836 states.
[2020-07-19 23:18:59,270 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 1204 transitions.
[2020-07-19 23:18:59,270 INFO  L78                 Accepts]: Start accepts. Automaton has 836 states and 1204 transitions. Word has length 151
[2020-07-19 23:18:59,270 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:59,271 INFO  L479      AbstractCegarLoop]: Abstraction has 836 states and 1204 transitions.
[2020-07-19 23:18:59,271 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:59,271 INFO  L276                IsEmpty]: Start isEmpty. Operand 836 states and 1204 transitions.
[2020-07-19 23:18:59,273 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 153
[2020-07-19 23:18:59,273 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:59,273 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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]
[2020-07-19 23:18:59,273 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28
[2020-07-19 23:18:59,273 INFO  L427      AbstractCegarLoop]: === Iteration 30 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:59,274 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:59,274 INFO  L82        PathProgramCache]: Analyzing trace with hash -1674902650, now seen corresponding path program 1 times
[2020-07-19 23:18:59,274 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:59,274 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452639585]
[2020-07-19 23:18:59,274 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:59,285 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:59,314 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:59,328 INFO  L134       CoverageAnalysis]: Checked inductivity of 170 backedges. 78 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked.
[2020-07-19 23:18:59,329 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452639585]
[2020-07-19 23:18:59,329 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:59,329 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-19 23:18:59,329 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110798251]
[2020-07-19 23:18:59,330 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-19 23:18:59,330 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:59,330 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-19 23:18:59,330 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-19 23:18:59,331 INFO  L87              Difference]: Start difference. First operand 836 states and 1204 transitions. Second operand 5 states.
[2020-07-19 23:18:59,562 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:59,562 INFO  L93              Difference]: Finished difference Result 1671 states and 2409 transitions.
[2020-07-19 23:18:59,563 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-19 23:18:59,563 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 152
[2020-07-19 23:18:59,563 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:59,567 INFO  L225             Difference]: With dead ends: 1671
[2020-07-19 23:18:59,567 INFO  L226             Difference]: Without dead ends: 831
[2020-07-19 23:18:59,572 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
[2020-07-19 23:18:59,573 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 831 states.
[2020-07-19 23:18:59,621 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 819.
[2020-07-19 23:18:59,621 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 819 states.
[2020-07-19 23:18:59,622 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1175 transitions.
[2020-07-19 23:18:59,623 INFO  L78                 Accepts]: Start accepts. Automaton has 819 states and 1175 transitions. Word has length 152
[2020-07-19 23:18:59,623 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:59,623 INFO  L479      AbstractCegarLoop]: Abstraction has 819 states and 1175 transitions.
[2020-07-19 23:18:59,623 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-19 23:18:59,623 INFO  L276                IsEmpty]: Start isEmpty. Operand 819 states and 1175 transitions.
[2020-07-19 23:18:59,625 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 160
[2020-07-19 23:18:59,625 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:59,626 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:59,626 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29
[2020-07-19 23:18:59,626 INFO  L427      AbstractCegarLoop]: === Iteration 31 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:59,626 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:59,626 INFO  L82        PathProgramCache]: Analyzing trace with hash 1165219020, now seen corresponding path program 1 times
[2020-07-19 23:18:59,626 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:59,627 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646779152]
[2020-07-19 23:18:59,627 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:59,675 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:59,700 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:18:59,715 INFO  L134       CoverageAnalysis]: Checked inductivity of 255 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked.
[2020-07-19 23:18:59,715 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646779152]
[2020-07-19 23:18:59,715 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:18:59,716 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-19 23:18:59,716 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414461058]
[2020-07-19 23:18:59,716 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-19 23:18:59,717 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:18:59,717 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-19 23:18:59,717 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-19 23:18:59,717 INFO  L87              Difference]: Start difference. First operand 819 states and 1175 transitions. Second operand 3 states.
[2020-07-19 23:18:59,819 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:18:59,819 INFO  L93              Difference]: Finished difference Result 2417 states and 3465 transitions.
[2020-07-19 23:18:59,820 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-19 23:18:59,820 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 159
[2020-07-19 23:18:59,820 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:18:59,827 INFO  L225             Difference]: With dead ends: 2417
[2020-07-19 23:18:59,828 INFO  L226             Difference]: Without dead ends: 1611
[2020-07-19 23:18:59,830 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
[2020-07-19 23:18:59,832 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1611 states.
[2020-07-19 23:18:59,904 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 821.
[2020-07-19 23:18:59,904 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 821 states.
[2020-07-19 23:18:59,906 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 1177 transitions.
[2020-07-19 23:18:59,907 INFO  L78                 Accepts]: Start accepts. Automaton has 821 states and 1177 transitions. Word has length 159
[2020-07-19 23:18:59,907 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:18:59,907 INFO  L479      AbstractCegarLoop]: Abstraction has 821 states and 1177 transitions.
[2020-07-19 23:18:59,907 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-19 23:18:59,907 INFO  L276                IsEmpty]: Start isEmpty. Operand 821 states and 1177 transitions.
[2020-07-19 23:18:59,910 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 160
[2020-07-19 23:18:59,910 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:18:59,910 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:18:59,911 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30
[2020-07-19 23:18:59,911 INFO  L427      AbstractCegarLoop]: === Iteration 32 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:18:59,911 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:18:59,911 INFO  L82        PathProgramCache]: Analyzing trace with hash 2119159178, now seen corresponding path program 1 times
[2020-07-19 23:18:59,912 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:18:59,912 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23205744]
[2020-07-19 23:18:59,912 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:18:59,975 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:19:00,012 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:19:00,029 INFO  L134       CoverageAnalysis]: Checked inductivity of 255 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked.
[2020-07-19 23:19:00,030 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23205744]
[2020-07-19 23:19:00,030 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-19 23:19:00,030 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-19 23:19:00,030 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735856097]
[2020-07-19 23:19:00,031 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-19 23:19:00,031 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM
[2020-07-19 23:19:00,031 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-19 23:19:00,031 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-19 23:19:00,031 INFO  L87              Difference]: Start difference. First operand 821 states and 1177 transitions. Second operand 3 states.
[2020-07-19 23:19:00,136 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-19 23:19:00,136 INFO  L93              Difference]: Finished difference Result 2416 states and 3461 transitions.
[2020-07-19 23:19:00,136 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-19 23:19:00,137 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 159
[2020-07-19 23:19:00,137 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-19 23:19:00,144 INFO  L225             Difference]: With dead ends: 2416
[2020-07-19 23:19:00,144 INFO  L226             Difference]: Without dead ends: 1608
[2020-07-19 23:19:00,148 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
[2020-07-19 23:19:00,150 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1608 states.
[2020-07-19 23:19:00,242 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1606.
[2020-07-19 23:19:00,243 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1606 states.
[2020-07-19 23:19:00,246 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1606 states to 1606 states and 2297 transitions.
[2020-07-19 23:19:00,247 INFO  L78                 Accepts]: Start accepts. Automaton has 1606 states and 2297 transitions. Word has length 159
[2020-07-19 23:19:00,247 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-19 23:19:00,247 INFO  L479      AbstractCegarLoop]: Abstraction has 1606 states and 2297 transitions.
[2020-07-19 23:19:00,248 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-19 23:19:00,248 INFO  L276                IsEmpty]: Start isEmpty. Operand 1606 states and 2297 transitions.
[2020-07-19 23:19:00,250 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 162
[2020-07-19 23:19:00,250 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-19 23:19:00,250 INFO  L422         BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-19 23:19:00,250 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31
[2020-07-19 23:19:00,251 INFO  L427      AbstractCegarLoop]: === Iteration 33 === [ssl3_acceptErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-19 23:19:00,251 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-19 23:19:00,251 INFO  L82        PathProgramCache]: Analyzing trace with hash 1294690318, now seen corresponding path program 1 times
[2020-07-19 23:19:00,251 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM
[2020-07-19 23:19:00,251 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086023107]
[2020-07-19 23:19:00,251 INFO  L95    rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7595ad3b
[2020-07-19 23:19:00,311 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-19 23:19:00,336 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32
[2020-07-19 23:19:00,337 FATAL L?                        ?]: An unrecoverable error occured during an interaction with an SMT solver:
de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Asserted terms must be closed
	at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.assertTerm(SMTInterpol.java:665)
	at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.InterpolantChecker.checkFinalInterpolants(InterpolantChecker.java:423)
	at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:218)
	at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:874)
	at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:392)
	at de.uni_freiburg.informatik.ultimate.logic.NoopScript.getInterpolants(NoopScript.java:386)
	at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337)
	at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337)
	at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191)
	at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285)
	at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.<init>(NestedInterpolantsBuilder.java:166)
	at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326)
	at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228)
	at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.<init>(InterpolatingTraceCheckCraig.java:97)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.<init>(AutomatonFreeRefinementEngine.java:85)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.<init>(TraceAbstractionRefinementEngine.java:75)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.<init>(TraceAbstractionStarter.java:127)
	at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317)
	at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
[2020-07-19 23:19:00,343 INFO  L168              Benchmark]: Toolchain (without parser) took 15080.86 ms. Allocated memory was 137.4 MB in the beginning and 466.1 MB in the end (delta: 328.7 MB). Free memory was 101.1 MB in the beginning and 252.0 MB in the end (delta: -150.9 MB). Peak memory consumption was 177.8 MB. Max. memory is 7.1 GB.
[2020-07-19 23:19:00,343 INFO  L168              Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-19 23:19:00,344 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 566.05 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 176.2 MB in the end (delta: -75.3 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB.
[2020-07-19 23:19:00,344 INFO  L168              Benchmark]: Boogie Preprocessor took 64.32 ms. Allocated memory is still 201.3 MB. Free memory was 176.2 MB in the beginning and 173.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB.
[2020-07-19 23:19:00,345 INFO  L168              Benchmark]: RCFGBuilder took 1000.31 ms. Allocated memory is still 201.3 MB. Free memory was 173.4 MB in the beginning and 114.5 MB in the end (delta: 58.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB.
[2020-07-19 23:19:00,345 INFO  L168              Benchmark]: TraceAbstraction took 13444.58 ms. Allocated memory was 201.3 MB in the beginning and 466.1 MB in the end (delta: 264.8 MB). Free memory was 113.9 MB in the beginning and 252.0 MB in the end (delta: -138.1 MB). Peak memory consumption was 126.6 MB. Max. memory is 7.1 GB.
[2020-07-19 23:19:00,347 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.31 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 566.05 ms. Allocated memory was 137.4 MB in the beginning and 201.3 MB in the end (delta: 64.0 MB). Free memory was 100.9 MB in the beginning and 176.2 MB in the end (delta: -75.3 MB). Peak memory consumption was 28.1 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 64.32 ms. Allocated memory is still 201.3 MB. Free memory was 176.2 MB in the beginning and 173.4 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.8 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 1000.31 ms. Allocated memory is still 201.3 MB. Free memory was 173.4 MB in the beginning and 114.5 MB in the end (delta: 58.8 MB). Peak memory consumption was 58.8 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 13444.58 ms. Allocated memory was 201.3 MB in the beginning and 466.1 MB in the end (delta: 264.8 MB). Free memory was 113.9 MB in the beginning and 252.0 MB in the end (delta: -138.1 MB). Peak memory consumption was 126.6 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - ExceptionOrErrorResult: SMTLIBException: Asserted terms must be closed
    de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Asserted terms must be closed: de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.assertTerm(SMTInterpol.java:665)
RESULT: Ultimate could not prove your program: Toolchain returned no result.
Received shutdown request...