/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-72570d3
[2020-08-22 17:14:05,118 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2020-08-22 17:14:05,199 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
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[2020-08-22 17:14:05,226 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
[2020-08-22 17:14:05,247 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-22 17:14:05,247 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-22 17:14:05,249 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-22 17:14:05,249 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-22 17:14:05,249 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-22 17:14:05,249 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-22 17:14:05,249 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-22 17:14:05,250 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-22 17:14:05,250 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-22 17:14:05,250 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-22 17:14:05,250 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-22 17:14:05,250 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-22 17:14:05,250 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-22 17:14:05,251 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-22 17:14:05,251 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-22 17:14:05,251 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-22 17:14:05,251 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-22 17:14:05,251 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-22 17:14:05,252 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-22 17:14:05,252 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-22 17:14:05,252 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-22 17:14:05,252 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-22 17:14:05,252 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-22 17:14:05,253 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-22 17:14:05,253 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-22 17:14:05,253 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-22 17:14:05,253 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-22 17:14:05,253 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-22 17:14:05,253 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-22 17:14:05,254 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2020-08-22 17:14:05,535 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-22 17:14:05,547 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-22 17:14:05,550 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-22 17:14:05,551 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-22 17:14:05,552 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-22 17:14:05,553 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-22 17:14:05,608 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4061353a0/0098c2973acf4d4e8d4c0d8184f436ab/FLAG65d9088cc
[2020-08-22 17:14:06,218 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-22 17:14:06,219 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-22 17:14:06,240 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4061353a0/0098c2973acf4d4e8d4c0d8184f436ab/FLAG65d9088cc
[2020-08-22 17:14:06,450 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4061353a0/0098c2973acf4d4e8d4c0d8184f436ab
[2020-08-22 17:14:06,461 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-22 17:14:06,463 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-22 17:14:06,466 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-22 17:14:06,466 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-22 17:14:06,470 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-22 17:14:06,471 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:14:06" (1/1) ...
[2020-08-22 17:14:06,475 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35aa2f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:06, skipping insertion in model container
[2020-08-22 17:14:06,475 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 05:14:06" (1/1) ...
[2020-08-22 17:14:06,484 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-22 17:14:06,583 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-22 17:14:07,616 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-22 17:14:07,640 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-22 17:14:08,181 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-22 17:14:08,212 INFO  L208         MainTranslator]: Completed translation
[2020-08-22 17:14:08,213 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08 WrapperNode
[2020-08-22 17:14:08,213 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-22 17:14:08,214 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-22 17:14:08,214 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-22 17:14:08,214 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-22 17:14:08,230 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08" (1/1) ...
[2020-08-22 17:14:08,230 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08" (1/1) ...
[2020-08-22 17:14:08,256 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08" (1/1) ...
[2020-08-22 17:14:08,257 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08" (1/1) ...
[2020-08-22 17:14:08,309 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08" (1/1) ...
[2020-08-22 17:14:08,350 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08" (1/1) ...
[2020-08-22 17:14:08,359 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08" (1/1) ...
[2020-08-22 17:14:08,376 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-22 17:14:08,376 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-22 17:14:08,377 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-22 17:14:08,379 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-22 17:14:08,381 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08" (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
[2020-08-22 17:14:08,455 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-22 17:14:08,456 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-22 17:14:08,456 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-22 17:14:08,456 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-22 17:14:08,456 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-22 17:14:08,456 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-22 17:14:08,457 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-22 17:14:08,457 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-22 17:14:08,457 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-22 17:14:08,457 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-22 17:14:08,457 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-22 17:14:08,458 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-22 17:14:08,458 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-22 17:14:08,458 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-22 17:14:08,458 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-22 17:14:08,458 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-22 17:14:08,459 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-22 17:14:08,459 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-22 17:14:08,459 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-22 17:14:08,459 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-22 17:14:08,459 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-22 17:14:08,460 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-22 17:14:10,944 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-22 17:14:10,944 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-22 17:14:10,954 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:14:10 BoogieIcfgContainer
[2020-08-22 17:14:10,954 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-22 17:14:10,956 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-22 17:14:10,956 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-22 17:14:10,959 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-22 17:14:10,960 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 05:14:06" (1/3) ...
[2020-08-22 17:14:10,960 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f9a983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:14:10, skipping insertion in model container
[2020-08-22 17:14:10,961 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 05:14:08" (2/3) ...
[2020-08-22 17:14:10,961 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32f9a983 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 05:14:10, skipping insertion in model container
[2020-08-22 17:14:10,961 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 05:14:10" (3/3) ...
[2020-08-22 17:14:10,963 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-22 17:14:10,974 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-08-22 17:14:10,984 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-22 17:14:10,999 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-22 17:14:11,028 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-22 17:14:11,028 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-22 17:14:11,028 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-08-22 17:14:11,029 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-22 17:14:11,029 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-22 17:14:11,029 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-22 17:14:11,029 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-22 17:14:11,029 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-22 17:14:11,069 INFO  L276                IsEmpty]: Start isEmpty. Operand 808 states.
[2020-08-22 17:14:11,101 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-22 17:14:11,101 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:14:11,103 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:14:11,103 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:14:11,110 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:14:11,111 INFO  L82        PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times
[2020-08-22 17:14:11,120 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:14:11,121 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747564929]
[2020-08-22 17:14:11,121 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:14:12,007 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:13,089 WARN  L193               SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:14:13,095 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:14:13,111 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:13,415 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:14:13,417 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747564929]
[2020-08-22 17:14:13,418 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:14:13,419 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:14:13,420 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515436724]
[2020-08-22 17:14:13,430 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:14:13,431 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:14:13,453 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:14:13,454 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:14:13,458 INFO  L87              Difference]: Start difference. First operand 808 states. Second operand 4 states.
[2020-08-22 17:14:14,088 WARN  L193               SmtUtils]: Spent 531.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-22 17:14:19,104 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:14:19,105 INFO  L93              Difference]: Finished difference Result 1527 states and 2683 transitions.
[2020-08-22 17:14:19,107 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 17:14:19,109 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-22 17:14:19,111 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:14:19,141 INFO  L225             Difference]: With dead ends: 1527
[2020-08-22 17:14:19,141 INFO  L226             Difference]: Without dead ends: 1311
[2020-08-22 17:14:19,148 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:14:19,168 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1311 states.
[2020-08-22 17:14:19,288 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309.
[2020-08-22 17:14:19,289 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1309 states.
[2020-08-22 17:14:19,296 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions.
[2020-08-22 17:14:19,298 INFO  L78                 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330
[2020-08-22 17:14:19,299 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:14:19,300 INFO  L479      AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions.
[2020-08-22 17:14:19,300 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:14:19,300 INFO  L276                IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions.
[2020-08-22 17:14:19,308 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-22 17:14:19,308 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:14:19,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:14:19,309 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-22 17:14:19,310 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:14:19,310 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:14:19,310 INFO  L82        PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times
[2020-08-22 17:14:19,310 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:14:19,311 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324910993]
[2020-08-22 17:14:19,311 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:14:19,535 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:20,147 WARN  L193               SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:14:20,148 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:14:20,153 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:20,387 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:14:20,388 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324910993]
[2020-08-22 17:14:20,388 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:14:20,389 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:14:20,389 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378990410]
[2020-08-22 17:14:20,392 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:14:20,392 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:14:20,392 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:14:20,393 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:14:20,393 INFO  L87              Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states.
[2020-08-22 17:14:20,847 WARN  L193               SmtUtils]: Spent 400.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-22 17:14:25,979 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:14:25,980 INFO  L93              Difference]: Finished difference Result 2683 states and 4213 transitions.
[2020-08-22 17:14:25,980 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 17:14:25,981 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-22 17:14:25,982 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:14:25,998 INFO  L225             Difference]: With dead ends: 2683
[2020-08-22 17:14:25,998 INFO  L226             Difference]: Without dead ends: 2301
[2020-08-22 17:14:26,002 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:14:26,007 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2301 states.
[2020-08-22 17:14:26,100 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299.
[2020-08-22 17:14:26,101 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2299 states.
[2020-08-22 17:14:26,113 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions.
[2020-08-22 17:14:26,114 INFO  L78                 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330
[2020-08-22 17:14:26,115 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:14:26,115 INFO  L479      AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions.
[2020-08-22 17:14:26,115 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:14:26,115 INFO  L276                IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions.
[2020-08-22 17:14:26,129 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-22 17:14:26,129 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:14:26,130 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:14:26,130 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-22 17:14:26,131 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:14:26,131 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:14:26,131 INFO  L82        PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times
[2020-08-22 17:14:26,133 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:14:26,134 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466675929]
[2020-08-22 17:14:26,138 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:14:26,555 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:27,411 WARN  L193               SmtUtils]: Spent 564.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:14:27,413 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:14:27,422 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:27,842 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:14:27,843 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466675929]
[2020-08-22 17:14:27,844 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:14:27,844 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:14:27,845 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100932831]
[2020-08-22 17:14:27,846 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:14:27,847 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:14:27,847 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:14:27,849 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:14:27,849 INFO  L87              Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states.
[2020-08-22 17:14:28,312 WARN  L193               SmtUtils]: Spent 405.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-22 17:14:32,822 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:14:32,823 INFO  L93              Difference]: Finished difference Result 4867 states and 7634 transitions.
[2020-08-22 17:14:32,823 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 17:14:32,823 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-22 17:14:32,825 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:14:32,846 INFO  L225             Difference]: With dead ends: 4867
[2020-08-22 17:14:32,846 INFO  L226             Difference]: Without dead ends: 4201
[2020-08-22 17:14:32,850 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:14:32,856 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4201 states.
[2020-08-22 17:14:32,977 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199.
[2020-08-22 17:14:32,977 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4199 states.
[2020-08-22 17:14:32,992 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions.
[2020-08-22 17:14:32,992 INFO  L78                 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330
[2020-08-22 17:14:32,993 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:14:32,993 INFO  L479      AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions.
[2020-08-22 17:14:32,993 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:14:32,994 INFO  L276                IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions.
[2020-08-22 17:14:33,004 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-22 17:14:33,004 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:14:33,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:14:33,005 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-22 17:14:33,006 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:14:33,006 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:14:33,006 INFO  L82        PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times
[2020-08-22 17:14:33,007 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:14:33,007 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833210068]
[2020-08-22 17:14:33,007 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:14:33,433 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:33,990 WARN  L193               SmtUtils]: Spent 384.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:14:33,991 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:14:33,997 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:34,172 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:14:34,172 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833210068]
[2020-08-22 17:14:34,173 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:14:34,173 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 17:14:34,173 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142193938]
[2020-08-22 17:14:34,174 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-22 17:14:34,174 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:14:34,174 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-22 17:14:34,175 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:14:34,175 INFO  L87              Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states.
[2020-08-22 17:14:40,997 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:14:40,997 INFO  L93              Difference]: Finished difference Result 12414 states and 19245 transitions.
[2020-08-22 17:14:41,004 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 17:14:41,004 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 330
[2020-08-22 17:14:41,005 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:14:41,042 INFO  L225             Difference]: With dead ends: 12414
[2020-08-22 17:14:41,042 INFO  L226             Difference]: Without dead ends: 8230
[2020-08-22 17:14:41,051 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-22 17:14:41,060 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8230 states.
[2020-08-22 17:14:41,328 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228.
[2020-08-22 17:14:41,328 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8228 states.
[2020-08-22 17:14:41,354 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions.
[2020-08-22 17:14:41,355 INFO  L78                 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330
[2020-08-22 17:14:41,355 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:14:41,355 INFO  L479      AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions.
[2020-08-22 17:14:41,356 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-22 17:14:41,356 INFO  L276                IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions.
[2020-08-22 17:14:41,375 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-22 17:14:41,375 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:14:41,376 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:14:41,376 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-22 17:14:41,377 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:14:41,377 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:14:41,377 INFO  L82        PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times
[2020-08-22 17:14:41,378 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:14:41,378 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302013511]
[2020-08-22 17:14:41,378 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:14:41,524 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:42,268 WARN  L193               SmtUtils]: Spent 596.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:14:42,270 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:14:42,278 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:42,446 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:14:42,446 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302013511]
[2020-08-22 17:14:42,447 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:14:42,447 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:14:42,447 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629322494]
[2020-08-22 17:14:42,448 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:14:42,448 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:14:42,448 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:14:42,449 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:14:42,449 INFO  L87              Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states.
[2020-08-22 17:14:50,271 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:14:50,272 INFO  L93              Difference]: Finished difference Result 24233 states and 37318 transitions.
[2020-08-22 17:14:50,272 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:14:50,272 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-22 17:14:50,273 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:14:50,333 INFO  L225             Difference]: With dead ends: 24233
[2020-08-22 17:14:50,333 INFO  L226             Difference]: Without dead ends: 16134
[2020-08-22 17:14:50,351 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:14:50,367 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16134 states.
[2020-08-22 17:14:50,775 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132.
[2020-08-22 17:14:50,776 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16132 states.
[2020-08-22 17:14:50,803 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions.
[2020-08-22 17:14:50,803 INFO  L78                 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332
[2020-08-22 17:14:50,804 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:14:50,804 INFO  L479      AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions.
[2020-08-22 17:14:50,804 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:14:50,804 INFO  L276                IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions.
[2020-08-22 17:14:50,837 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-22 17:14:50,837 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:14:50,838 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:14:50,838 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-22 17:14:50,838 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:14:50,839 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:14:50,839 INFO  L82        PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times
[2020-08-22 17:14:50,839 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:14:50,839 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856475904]
[2020-08-22 17:14:50,840 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:14:50,894 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:51,420 WARN  L193               SmtUtils]: Spent 451.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:14:51,421 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:14:51,426 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:14:51,516 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:14:51,517 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856475904]
[2020-08-22 17:14:51,517 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:14:51,517 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:14:51,517 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326303030]
[2020-08-22 17:14:51,518 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:14:51,518 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:14:51,519 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:14:51,519 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:14:51,519 INFO  L87              Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states.
[2020-08-22 17:14:59,934 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:14:59,935 INFO  L93              Difference]: Finished difference Result 48321 states and 74099 transitions.
[2020-08-22 17:14:59,935 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:14:59,936 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-22 17:14:59,936 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:15:00,004 INFO  L225             Difference]: With dead ends: 48321
[2020-08-22 17:15:00,004 INFO  L226             Difference]: Without dead ends: 32231
[2020-08-22 17:15:00,040 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:15:00,078 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32231 states.
[2020-08-22 17:15:00,636 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151.
[2020-08-22 17:15:00,637 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16151 states.
[2020-08-22 17:15:00,658 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions.
[2020-08-22 17:15:00,658 INFO  L78                 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332
[2020-08-22 17:15:00,658 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:15:00,658 INFO  L479      AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions.
[2020-08-22 17:15:00,659 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:15:00,659 INFO  L276                IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions.
[2020-08-22 17:15:00,690 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 334
[2020-08-22 17:15:00,690 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:15:00,690 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:15:00,691 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-22 17:15:00,691 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:15:00,691 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:15:00,691 INFO  L82        PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times
[2020-08-22 17:15:00,692 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:15:00,692 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64416103]
[2020-08-22 17:15:00,692 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:15:00,739 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:01,528 WARN  L193               SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:15:01,529 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:15:01,534 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:01,631 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:15:01,632 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64416103]
[2020-08-22 17:15:01,632 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:15:01,632 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:15:01,635 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129139225]
[2020-08-22 17:15:01,635 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:15:01,636 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:15:01,636 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:15:01,636 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:15:01,636 INFO  L87              Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states.
[2020-08-22 17:15:10,187 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:15:10,187 INFO  L93              Difference]: Finished difference Result 48340 states and 74120 transitions.
[2020-08-22 17:15:10,187 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:15:10,188 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 333
[2020-08-22 17:15:10,188 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:15:10,250 INFO  L225             Difference]: With dead ends: 48340
[2020-08-22 17:15:10,250 INFO  L226             Difference]: Without dead ends: 32249
[2020-08-22 17:15:10,279 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:15:10,305 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32249 states.
[2020-08-22 17:15:10,894 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32249 to 16169.
[2020-08-22 17:15:10,895 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16169 states.
[2020-08-22 17:15:10,914 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16169 states to 16169 states and 24790 transitions.
[2020-08-22 17:15:10,914 INFO  L78                 Accepts]: Start accepts. Automaton has 16169 states and 24790 transitions. Word has length 333
[2020-08-22 17:15:10,914 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:15:10,914 INFO  L479      AbstractCegarLoop]: Abstraction has 16169 states and 24790 transitions.
[2020-08-22 17:15:10,914 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:15:10,914 INFO  L276                IsEmpty]: Start isEmpty. Operand 16169 states and 24790 transitions.
[2020-08-22 17:15:10,935 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 335
[2020-08-22 17:15:10,936 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:15:10,936 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:15:10,936 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-08-22 17:15:10,936 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:15:10,937 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:15:10,937 INFO  L82        PathProgramCache]: Analyzing trace with hash 1155788840, now seen corresponding path program 1 times
[2020-08-22 17:15:10,937 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:15:10,937 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644149820]
[2020-08-22 17:15:10,938 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:15:11,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:11,524 WARN  L193               SmtUtils]: Spent 374.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:15:11,525 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:15:11,530 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:12,366 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:15:12,366 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644149820]
[2020-08-22 17:15:12,367 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:15:12,367 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:15:12,367 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620094587]
[2020-08-22 17:15:12,368 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:15:12,368 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:15:12,368 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:15:12,369 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:15:12,369 INFO  L87              Difference]: Start difference. First operand 16169 states and 24790 transitions. Second operand 4 states.
[2020-08-22 17:15:20,720 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:15:20,720 INFO  L93              Difference]: Finished difference Result 45818 states and 70099 transitions.
[2020-08-22 17:15:20,722 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:15:20,722 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 334
[2020-08-22 17:15:20,722 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:15:20,780 INFO  L225             Difference]: With dead ends: 45818
[2020-08-22 17:15:20,780 INFO  L226             Difference]: Without dead ends: 29894
[2020-08-22 17:15:20,811 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:15:20,835 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 29894 states.
[2020-08-22 17:15:21,842 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 29894 to 29892.
[2020-08-22 17:15:21,843 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 29892 states.
[2020-08-22 17:15:21,891 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 29892 states to 29892 states and 45506 transitions.
[2020-08-22 17:15:21,891 INFO  L78                 Accepts]: Start accepts. Automaton has 29892 states and 45506 transitions. Word has length 334
[2020-08-22 17:15:21,891 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:15:21,891 INFO  L479      AbstractCegarLoop]: Abstraction has 29892 states and 45506 transitions.
[2020-08-22 17:15:21,891 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:15:21,892 INFO  L276                IsEmpty]: Start isEmpty. Operand 29892 states and 45506 transitions.
[2020-08-22 17:15:21,918 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 335
[2020-08-22 17:15:21,918 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:15:21,919 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:15:21,919 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-08-22 17:15:21,919 INFO  L427      AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:15:21,919 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:15:21,920 INFO  L82        PathProgramCache]: Analyzing trace with hash -942652091, now seen corresponding path program 1 times
[2020-08-22 17:15:21,920 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:15:21,920 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737158804]
[2020-08-22 17:15:21,920 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:15:22,194 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:22,847 WARN  L193               SmtUtils]: Spent 471.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:15:22,849 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:15:22,854 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:22,964 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:15:22,964 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737158804]
[2020-08-22 17:15:22,965 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:15:22,965 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 17:15:22,965 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600840218]
[2020-08-22 17:15:22,966 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-22 17:15:22,966 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:15:22,966 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-22 17:15:22,969 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:15:22,969 INFO  L87              Difference]: Start difference. First operand 29892 states and 45506 transitions. Second operand 5 states.
[2020-08-22 17:15:29,765 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:15:29,765 INFO  L93              Difference]: Finished difference Result 61161 states and 93093 transitions.
[2020-08-22 17:15:29,766 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 17:15:29,766 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 334
[2020-08-22 17:15:29,766 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:15:29,820 INFO  L225             Difference]: With dead ends: 61161
[2020-08-22 17:15:29,820 INFO  L226             Difference]: Without dead ends: 30761
[2020-08-22 17:15:29,848 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-22 17:15:29,873 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30761 states.
[2020-08-22 17:15:30,757 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30761 to 30759.
[2020-08-22 17:15:30,757 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30759 states.
[2020-08-22 17:15:30,794 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30759 states to 30759 states and 46644 transitions.
[2020-08-22 17:15:30,795 INFO  L78                 Accepts]: Start accepts. Automaton has 30759 states and 46644 transitions. Word has length 334
[2020-08-22 17:15:30,795 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:15:30,795 INFO  L479      AbstractCegarLoop]: Abstraction has 30759 states and 46644 transitions.
[2020-08-22 17:15:30,795 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-22 17:15:30,795 INFO  L276                IsEmpty]: Start isEmpty. Operand 30759 states and 46644 transitions.
[2020-08-22 17:15:30,815 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 337
[2020-08-22 17:15:30,815 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:15:30,815 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:15:30,815 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8
[2020-08-22 17:15:30,816 INFO  L427      AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:15:30,816 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:15:30,816 INFO  L82        PathProgramCache]: Analyzing trace with hash 1954972824, now seen corresponding path program 1 times
[2020-08-22 17:15:30,816 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:15:30,816 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003708986]
[2020-08-22 17:15:30,816 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:15:30,854 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:31,327 WARN  L193               SmtUtils]: Spent 394.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:15:31,328 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:15:31,333 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:31,449 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:15:31,449 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003708986]
[2020-08-22 17:15:31,450 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:15:31,450 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:15:31,450 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202862477]
[2020-08-22 17:15:31,451 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:15:31,451 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:15:31,451 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:15:31,451 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:15:31,452 INFO  L87              Difference]: Start difference. First operand 30759 states and 46644 transitions. Second operand 4 states.
[2020-08-22 17:15:37,673 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:15:37,673 INFO  L93              Difference]: Finished difference Result 91405 states and 138455 transitions.
[2020-08-22 17:15:37,674 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:15:37,674 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 336
[2020-08-22 17:15:37,674 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:15:37,734 INFO  L225             Difference]: With dead ends: 91405
[2020-08-22 17:15:37,735 INFO  L226             Difference]: Without dead ends: 61099
[2020-08-22 17:15:37,766 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:15:37,813 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 61099 states.
[2020-08-22 17:15:39,196 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 61099 to 30817.
[2020-08-22 17:15:39,196 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30817 states.
[2020-08-22 17:15:39,230 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30817 states to 30817 states and 46719 transitions.
[2020-08-22 17:15:39,230 INFO  L78                 Accepts]: Start accepts. Automaton has 30817 states and 46719 transitions. Word has length 336
[2020-08-22 17:15:39,231 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:15:39,231 INFO  L479      AbstractCegarLoop]: Abstraction has 30817 states and 46719 transitions.
[2020-08-22 17:15:39,231 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:15:39,231 INFO  L276                IsEmpty]: Start isEmpty. Operand 30817 states and 46719 transitions.
[2020-08-22 17:15:39,254 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 337
[2020-08-22 17:15:39,255 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:15:39,256 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:15:39,256 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9
[2020-08-22 17:15:39,257 INFO  L427      AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:15:39,257 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:15:39,257 INFO  L82        PathProgramCache]: Analyzing trace with hash 1525087342, now seen corresponding path program 1 times
[2020-08-22 17:15:39,257 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:15:39,258 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382262820]
[2020-08-22 17:15:39,258 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:15:39,380 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:39,897 WARN  L193               SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:15:39,898 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:15:39,903 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:40,076 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:15:40,077 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382262820]
[2020-08-22 17:15:40,077 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:15:40,077 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:15:40,077 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538106230]
[2020-08-22 17:15:40,078 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:15:40,078 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:15:40,079 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:15:40,079 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:15:40,079 INFO  L87              Difference]: Start difference. First operand 30817 states and 46719 transitions. Second operand 4 states.
[2020-08-22 17:15:51,598 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:15:51,599 INFO  L93              Difference]: Finished difference Result 90896 states and 137566 transitions.
[2020-08-22 17:15:51,599 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:15:51,600 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 336
[2020-08-22 17:15:51,600 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:15:51,669 INFO  L225             Difference]: With dead ends: 90896
[2020-08-22 17:15:51,669 INFO  L226             Difference]: Without dead ends: 60364
[2020-08-22 17:15:51,695 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:15:51,736 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 60364 states.
[2020-08-22 17:15:53,846 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 60364 to 60362.
[2020-08-22 17:15:53,847 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 60362 states.
[2020-08-22 17:15:53,918 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 60362 states to 60362 states and 90890 transitions.
[2020-08-22 17:15:53,918 INFO  L78                 Accepts]: Start accepts. Automaton has 60362 states and 90890 transitions. Word has length 336
[2020-08-22 17:15:53,918 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:15:53,918 INFO  L479      AbstractCegarLoop]: Abstraction has 60362 states and 90890 transitions.
[2020-08-22 17:15:53,919 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:15:53,919 INFO  L276                IsEmpty]: Start isEmpty. Operand 60362 states and 90890 transitions.
[2020-08-22 17:15:53,969 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 337
[2020-08-22 17:15:53,969 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:15:53,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:15:53,970 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10
[2020-08-22 17:15:53,970 INFO  L427      AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:15:53,970 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:15:53,970 INFO  L82        PathProgramCache]: Analyzing trace with hash 204469451, now seen corresponding path program 1 times
[2020-08-22 17:15:53,970 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:15:53,971 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519918738]
[2020-08-22 17:15:53,971 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:15:54,253 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:54,790 WARN  L193               SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:15:54,791 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:15:54,803 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:15:54,906 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:15:54,906 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519918738]
[2020-08-22 17:15:54,906 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:15:54,907 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 17:15:54,907 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083736405]
[2020-08-22 17:15:54,907 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-22 17:15:54,908 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:15:54,908 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-22 17:15:54,909 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:15:54,909 INFO  L87              Difference]: Start difference. First operand 60362 states and 90890 transitions. Second operand 5 states.
[2020-08-22 17:16:03,271 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:16:03,272 INFO  L93              Difference]: Finished difference Result 124456 states and 187265 transitions.
[2020-08-22 17:16:03,273 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 17:16:03,273 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 336
[2020-08-22 17:16:03,273 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:16:03,343 INFO  L225             Difference]: With dead ends: 124456
[2020-08-22 17:16:03,344 INFO  L226             Difference]: Without dead ends: 62896
[2020-08-22 17:16:03,393 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-22 17:16:03,438 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 62896 states.
[2020-08-22 17:16:07,333 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 62896 to 62894.
[2020-08-22 17:16:07,333 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 62894 states.
[2020-08-22 17:16:07,419 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 62894 states to 62894 states and 94291 transitions.
[2020-08-22 17:16:07,420 INFO  L78                 Accepts]: Start accepts. Automaton has 62894 states and 94291 transitions. Word has length 336
[2020-08-22 17:16:07,420 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:16:07,420 INFO  L479      AbstractCegarLoop]: Abstraction has 62894 states and 94291 transitions.
[2020-08-22 17:16:07,420 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-22 17:16:07,420 INFO  L276                IsEmpty]: Start isEmpty. Operand 62894 states and 94291 transitions.
[2020-08-22 17:16:07,461 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 337
[2020-08-22 17:16:07,462 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:16:07,462 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:16:07,462 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11
[2020-08-22 17:16:07,462 INFO  L427      AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:16:07,462 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:16:07,463 INFO  L82        PathProgramCache]: Analyzing trace with hash 1381804601, now seen corresponding path program 1 times
[2020-08-22 17:16:07,463 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:16:07,463 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726538]
[2020-08-22 17:16:07,463 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:16:07,680 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:16:08,432 WARN  L193               SmtUtils]: Spent 568.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:16:08,434 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:16:08,441 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:16:08,665 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:16:08,665 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726538]
[2020-08-22 17:16:08,667 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:16:08,667 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 17:16:08,667 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611060342]
[2020-08-22 17:16:08,668 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-22 17:16:08,668 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:16:08,669 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-22 17:16:08,669 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:16:08,669 INFO  L87              Difference]: Start difference. First operand 62894 states and 94291 transitions. Second operand 5 states.
[2020-08-22 17:16:23,882 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:16:23,882 INFO  L93              Difference]: Finished difference Result 180006 states and 269292 transitions.
[2020-08-22 17:16:23,883 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 17:16:23,883 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 336
[2020-08-22 17:16:23,883 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:16:24,000 INFO  L225             Difference]: With dead ends: 180006
[2020-08-22 17:16:24,000 INFO  L226             Difference]: Without dead ends: 119248
[2020-08-22 17:16:24,043 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-22 17:16:24,112 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 119248 states.
[2020-08-22 17:16:27,212 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 119248 to 63493.
[2020-08-22 17:16:27,213 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 63493 states.
[2020-08-22 17:16:27,289 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 63493 states to 63493 states and 95179 transitions.
[2020-08-22 17:16:27,290 INFO  L78                 Accepts]: Start accepts. Automaton has 63493 states and 95179 transitions. Word has length 336
[2020-08-22 17:16:27,290 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:16:27,290 INFO  L479      AbstractCegarLoop]: Abstraction has 63493 states and 95179 transitions.
[2020-08-22 17:16:27,290 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-22 17:16:27,290 INFO  L276                IsEmpty]: Start isEmpty. Operand 63493 states and 95179 transitions.
[2020-08-22 17:16:27,349 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 337
[2020-08-22 17:16:27,349 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:16:27,350 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:16:27,350 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12
[2020-08-22 17:16:27,350 INFO  L427      AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:16:27,350 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:16:27,351 INFO  L82        PathProgramCache]: Analyzing trace with hash 1523242626, now seen corresponding path program 1 times
[2020-08-22 17:16:27,351 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:16:27,351 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032871063]
[2020-08-22 17:16:27,351 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:16:27,449 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:16:28,103 WARN  L193               SmtUtils]: Spent 560.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:16:28,105 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:16:28,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:16:28,211 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:16:28,212 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032871063]
[2020-08-22 17:16:28,212 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:16:28,212 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:16:28,213 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188786092]
[2020-08-22 17:16:28,213 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:16:28,213 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:16:28,214 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:16:28,214 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:16:28,214 INFO  L87              Difference]: Start difference. First operand 63493 states and 95179 transitions. Second operand 4 states.
[2020-08-22 17:16:39,342 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:16:39,342 INFO  L93              Difference]: Finished difference Result 154747 states and 233875 transitions.
[2020-08-22 17:16:39,343 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:16:39,343 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 336
[2020-08-22 17:16:39,343 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:16:39,453 INFO  L225             Difference]: With dead ends: 154747
[2020-08-22 17:16:39,453 INFO  L226             Difference]: Without dead ends: 98207
[2020-08-22 17:16:39,500 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:16:39,569 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 98207 states.
[2020-08-22 17:16:45,426 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 98207 to 78445.
[2020-08-22 17:16:45,427 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 78445 states.
[2020-08-22 17:16:45,516 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 78445 states to 78445 states and 119373 transitions.
[2020-08-22 17:16:45,516 INFO  L78                 Accepts]: Start accepts. Automaton has 78445 states and 119373 transitions. Word has length 336
[2020-08-22 17:16:45,517 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:16:45,517 INFO  L479      AbstractCegarLoop]: Abstraction has 78445 states and 119373 transitions.
[2020-08-22 17:16:45,517 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:16:45,517 INFO  L276                IsEmpty]: Start isEmpty. Operand 78445 states and 119373 transitions.
[2020-08-22 17:16:45,556 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 339
[2020-08-22 17:16:45,556 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:16:45,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:16:45,556 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13
[2020-08-22 17:16:45,557 INFO  L427      AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:16:45,557 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:16:45,557 INFO  L82        PathProgramCache]: Analyzing trace with hash 1011511093, now seen corresponding path program 1 times
[2020-08-22 17:16:45,557 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:16:45,557 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071816885]
[2020-08-22 17:16:45,557 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:16:45,626 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:16:46,235 WARN  L193               SmtUtils]: Spent 505.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:16:46,236 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:16:46,240 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:16:46,351 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:16:46,351 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071816885]
[2020-08-22 17:16:46,352 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:16:46,352 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:16:46,352 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439253965]
[2020-08-22 17:16:46,353 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:16:46,353 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:16:46,353 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:16:46,353 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:16:46,353 INFO  L87              Difference]: Start difference. First operand 78445 states and 119373 transitions. Second operand 4 states.
[2020-08-22 17:16:58,441 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:16:58,441 INFO  L93              Difference]: Finished difference Result 191303 states and 292769 transitions.
[2020-08-22 17:16:58,442 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:16:58,442 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 338
[2020-08-22 17:16:58,442 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:16:58,615 INFO  L225             Difference]: With dead ends: 191303
[2020-08-22 17:16:58,615 INFO  L226             Difference]: Without dead ends: 121215
[2020-08-22 17:16:58,685 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:16:58,780 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 121215 states.
[2020-08-22 17:17:06,585 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 121215 to 105189.
[2020-08-22 17:17:06,586 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 105189 states.
[2020-08-22 17:17:06,739 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105189 states to 105189 states and 162401 transitions.
[2020-08-22 17:17:06,739 INFO  L78                 Accepts]: Start accepts. Automaton has 105189 states and 162401 transitions. Word has length 338
[2020-08-22 17:17:06,739 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:17:06,739 INFO  L479      AbstractCegarLoop]: Abstraction has 105189 states and 162401 transitions.
[2020-08-22 17:17:06,739 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:17:06,739 INFO  L276                IsEmpty]: Start isEmpty. Operand 105189 states and 162401 transitions.
[2020-08-22 17:17:06,780 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 339
[2020-08-22 17:17:06,781 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:17:06,781 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:17:06,781 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14
[2020-08-22 17:17:06,781 INFO  L427      AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:17:06,781 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:17:06,781 INFO  L82        PathProgramCache]: Analyzing trace with hash -1179578371, now seen corresponding path program 1 times
[2020-08-22 17:17:06,782 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:17:06,782 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047176120]
[2020-08-22 17:17:06,782 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:17:06,827 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:17:07,284 WARN  L193               SmtUtils]: Spent 388.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:17:07,286 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:17:07,291 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:17:07,379 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:17:07,380 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047176120]
[2020-08-22 17:17:07,380 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:17:07,380 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:17:07,380 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828725842]
[2020-08-22 17:17:07,381 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:17:07,381 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:17:07,382 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:17:07,382 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:17:07,382 INFO  L87              Difference]: Start difference. First operand 105189 states and 162401 transitions. Second operand 4 states.
[2020-08-22 17:17:28,462 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:17:28,463 INFO  L93              Difference]: Finished difference Result 309621 states and 477629 transitions.
[2020-08-22 17:17:28,464 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:17:28,464 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 338
[2020-08-22 17:17:28,464 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:17:28,742 INFO  L225             Difference]: With dead ends: 309621
[2020-08-22 17:17:28,742 INFO  L226             Difference]: Without dead ends: 207139
[2020-08-22 17:17:28,832 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:17:28,971 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 207139 states.
[2020-08-22 17:17:36,257 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 207139 to 105517.
[2020-08-22 17:17:36,258 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 105517 states.
[2020-08-22 17:17:36,392 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105517 states to 105517 states and 162839 transitions.
[2020-08-22 17:17:36,393 INFO  L78                 Accepts]: Start accepts. Automaton has 105517 states and 162839 transitions. Word has length 338
[2020-08-22 17:17:36,393 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:17:36,393 INFO  L479      AbstractCegarLoop]: Abstraction has 105517 states and 162839 transitions.
[2020-08-22 17:17:36,393 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:17:36,393 INFO  L276                IsEmpty]: Start isEmpty. Operand 105517 states and 162839 transitions.
[2020-08-22 17:17:36,435 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 340
[2020-08-22 17:17:36,435 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:17:36,435 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:17:36,435 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15
[2020-08-22 17:17:36,435 INFO  L427      AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:17:36,436 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:17:36,436 INFO  L82        PathProgramCache]: Analyzing trace with hash 2004623867, now seen corresponding path program 1 times
[2020-08-22 17:17:36,436 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:17:36,436 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943287513]
[2020-08-22 17:17:36,436 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:17:36,477 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:17:36,940 WARN  L193               SmtUtils]: Spent 390.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:17:36,941 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:17:36,945 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:17:37,006 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:17:37,006 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943287513]
[2020-08-22 17:17:37,006 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:17:37,006 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:17:37,007 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285936098]
[2020-08-22 17:17:37,007 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:17:37,008 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:17:37,008 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:17:37,010 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:17:37,010 INFO  L87              Difference]: Start difference. First operand 105517 states and 162839 transitions. Second operand 4 states.
[2020-08-22 17:17:59,131 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:17:59,131 INFO  L93              Difference]: Finished difference Result 309897 states and 477903 transitions.
[2020-08-22 17:17:59,132 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:17:59,132 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 339
[2020-08-22 17:17:59,132 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:17:59,408 INFO  L225             Difference]: With dead ends: 309897
[2020-08-22 17:17:59,409 INFO  L226             Difference]: Without dead ends: 207435
[2020-08-22 17:17:59,507 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:17:59,670 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 207435 states.
[2020-08-22 17:18:06,901 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 207435 to 105845.
[2020-08-22 17:18:06,902 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 105845 states.
[2020-08-22 17:18:07,048 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105845 states to 105845 states and 163207 transitions.
[2020-08-22 17:18:07,048 INFO  L78                 Accepts]: Start accepts. Automaton has 105845 states and 163207 transitions. Word has length 339
[2020-08-22 17:18:07,049 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:18:07,049 INFO  L479      AbstractCegarLoop]: Abstraction has 105845 states and 163207 transitions.
[2020-08-22 17:18:07,049 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:18:07,049 INFO  L276                IsEmpty]: Start isEmpty. Operand 105845 states and 163207 transitions.
[2020-08-22 17:18:07,089 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 340
[2020-08-22 17:18:07,089 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:18:07,089 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:18:07,090 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16
[2020-08-22 17:18:07,090 INFO  L427      AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:18:07,090 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:18:07,090 INFO  L82        PathProgramCache]: Analyzing trace with hash 130285857, now seen corresponding path program 1 times
[2020-08-22 17:18:07,090 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:18:07,090 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509212582]
[2020-08-22 17:18:07,091 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:18:07,142 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:18:07,701 WARN  L193               SmtUtils]: Spent 433.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:18:07,702 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:18:07,708 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:18:09,618 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:18:09,618 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509212582]
[2020-08-22 17:18:09,619 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:18:09,619 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 17:18:09,619 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908963692]
[2020-08-22 17:18:09,620 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-22 17:18:09,620 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:18:09,620 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-22 17:18:09,621 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-22 17:18:09,621 INFO  L87              Difference]: Start difference. First operand 105845 states and 163207 transitions. Second operand 6 states.
[2020-08-22 17:18:10,117 WARN  L193               SmtUtils]: Spent 442.00 ms on a formula simplification that was a NOOP. DAG size: 283
[2020-08-22 17:18:22,145 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:18:22,145 INFO  L93              Difference]: Finished difference Result 204153 states and 315228 transitions.
[2020-08-22 17:18:22,146 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-22 17:18:22,146 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 339
[2020-08-22 17:18:22,146 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:18:22,268 INFO  L225             Difference]: With dead ends: 204153
[2020-08-22 17:18:22,269 INFO  L226             Difference]: Without dead ends: 105845
[2020-08-22 17:18:22,325 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72
[2020-08-22 17:18:22,391 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 105845 states.
[2020-08-22 17:18:29,501 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 105845 to 105845.
[2020-08-22 17:18:29,501 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 105845 states.
[2020-08-22 17:18:29,638 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105845 states to 105845 states and 161901 transitions.
[2020-08-22 17:18:29,638 INFO  L78                 Accepts]: Start accepts. Automaton has 105845 states and 161901 transitions. Word has length 339
[2020-08-22 17:18:29,638 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:18:29,638 INFO  L479      AbstractCegarLoop]: Abstraction has 105845 states and 161901 transitions.
[2020-08-22 17:18:29,638 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-22 17:18:29,638 INFO  L276                IsEmpty]: Start isEmpty. Operand 105845 states and 161901 transitions.
[2020-08-22 17:18:29,678 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 340
[2020-08-22 17:18:29,678 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:18:29,678 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:18:29,678 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17
[2020-08-22 17:18:29,679 INFO  L427      AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:18:29,679 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:18:29,679 INFO  L82        PathProgramCache]: Analyzing trace with hash 450094822, now seen corresponding path program 1 times
[2020-08-22 17:18:29,679 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:18:29,679 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190506779]
[2020-08-22 17:18:29,679 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:18:29,904 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:18:30,516 WARN  L193               SmtUtils]: Spent 397.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:18:30,520 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:18:30,524 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:18:32,541 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:18:32,542 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190506779]
[2020-08-22 17:18:32,542 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:18:32,542 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 17:18:32,542 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641596549]
[2020-08-22 17:18:32,543 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-22 17:18:32,543 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:18:32,543 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-22 17:18:32,543 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:18:32,544 INFO  L87              Difference]: Start difference. First operand 105845 states and 161901 transitions. Second operand 5 states.
[2020-08-22 17:18:54,312 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:18:54,313 INFO  L93              Difference]: Finished difference Result 311724 states and 476902 transitions.
[2020-08-22 17:18:54,314 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 17:18:54,314 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 339
[2020-08-22 17:18:54,314 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:18:54,596 INFO  L225             Difference]: With dead ends: 311724
[2020-08-22 17:18:54,596 INFO  L226             Difference]: Without dead ends: 206710
[2020-08-22 17:18:54,688 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-22 17:18:54,830 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 206710 states.
[2020-08-22 17:19:13,480 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 206710 to 206708.
[2020-08-22 17:19:13,480 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 206708 states.
[2020-08-22 17:19:13,775 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 206708 states to 206708 states and 314812 transitions.
[2020-08-22 17:19:13,775 INFO  L78                 Accepts]: Start accepts. Automaton has 206708 states and 314812 transitions. Word has length 339
[2020-08-22 17:19:13,776 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:19:13,776 INFO  L479      AbstractCegarLoop]: Abstraction has 206708 states and 314812 transitions.
[2020-08-22 17:19:13,776 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-22 17:19:13,776 INFO  L276                IsEmpty]: Start isEmpty. Operand 206708 states and 314812 transitions.
[2020-08-22 17:19:13,859 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 341
[2020-08-22 17:19:13,859 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:19:13,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:19:13,859 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18
[2020-08-22 17:19:13,860 INFO  L427      AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:19:13,860 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:19:13,860 INFO  L82        PathProgramCache]: Analyzing trace with hash -1313560112, now seen corresponding path program 1 times
[2020-08-22 17:19:13,860 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:19:13,860 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059897383]
[2020-08-22 17:19:13,860 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:19:14,056 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:19:14,619 WARN  L193               SmtUtils]: Spent 436.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:19:14,621 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:19:14,624 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:19:14,695 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:19:14,695 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059897383]
[2020-08-22 17:19:14,695 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:19:14,696 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 17:19:14,696 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539336211]
[2020-08-22 17:19:14,696 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-22 17:19:14,696 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:19:14,696 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-22 17:19:14,697 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:19:14,697 INFO  L87              Difference]: Start difference. First operand 206708 states and 314812 transitions. Second operand 5 states.
[2020-08-22 17:19:38,190 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:19:38,190 INFO  L93              Difference]: Finished difference Result 299649 states and 456173 transitions.
[2020-08-22 17:19:38,191 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 17:19:38,191 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 340
[2020-08-22 17:19:38,191 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:19:38,459 INFO  L225             Difference]: With dead ends: 299649
[2020-08-22 17:19:38,460 INFO  L226             Difference]: Without dead ends: 206710
[2020-08-22 17:19:38,543 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-22 17:19:38,687 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 206710 states.
[2020-08-22 17:19:58,234 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 206710 to 202446.
[2020-08-22 17:19:58,235 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 202446 states.
[2020-08-22 17:19:58,533 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 202446 states to 202446 states and 308628 transitions.
[2020-08-22 17:19:58,534 INFO  L78                 Accepts]: Start accepts. Automaton has 202446 states and 308628 transitions. Word has length 340
[2020-08-22 17:19:58,534 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:19:58,534 INFO  L479      AbstractCegarLoop]: Abstraction has 202446 states and 308628 transitions.
[2020-08-22 17:19:58,534 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-22 17:19:58,534 INFO  L276                IsEmpty]: Start isEmpty. Operand 202446 states and 308628 transitions.
[2020-08-22 17:19:58,616 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 344
[2020-08-22 17:19:58,616 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:19:58,616 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:19:58,617 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19
[2020-08-22 17:19:58,617 INFO  L427      AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:19:58,617 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:19:58,617 INFO  L82        PathProgramCache]: Analyzing trace with hash -1213258003, now seen corresponding path program 1 times
[2020-08-22 17:19:58,617 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:19:58,618 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437933684]
[2020-08-22 17:19:58,618 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:19:58,657 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:19:59,556 WARN  L193               SmtUtils]: Spent 836.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:19:59,557 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:19:59,562 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:19:59,623 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:19:59,623 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437933684]
[2020-08-22 17:19:59,623 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:19:59,624 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:19:59,624 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481750555]
[2020-08-22 17:19:59,624 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:19:59,625 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:19:59,625 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:19:59,625 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:19:59,625 INFO  L87              Difference]: Start difference. First operand 202446 states and 308628 transitions. Second operand 4 states.
[2020-08-22 17:20:42,610 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:20:42,610 INFO  L93              Difference]: Finished difference Result 603444 states and 919704 transitions.
[2020-08-22 17:20:42,611 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:20:42,611 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 343
[2020-08-22 17:20:42,611 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:20:43,207 INFO  L225             Difference]: With dead ends: 603444
[2020-08-22 17:20:43,207 INFO  L226             Difference]: Without dead ends: 402612
[2020-08-22 17:20:43,392 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:20:43,673 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 402612 states.
[2020-08-22 17:21:07,362 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 402612 to 202790.
[2020-08-22 17:21:07,363 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 202790 states.
[2020-08-22 17:21:07,658 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 202790 states to 202790 states and 308996 transitions.
[2020-08-22 17:21:07,658 INFO  L78                 Accepts]: Start accepts. Automaton has 202790 states and 308996 transitions. Word has length 343
[2020-08-22 17:21:07,659 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:21:07,659 INFO  L479      AbstractCegarLoop]: Abstraction has 202790 states and 308996 transitions.
[2020-08-22 17:21:07,659 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:21:07,659 INFO  L276                IsEmpty]: Start isEmpty. Operand 202790 states and 308996 transitions.
[2020-08-22 17:21:07,739 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 344
[2020-08-22 17:21:07,739 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:21:07,739 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:21:07,739 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20
[2020-08-22 17:21:07,739 INFO  L427      AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:21:07,740 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:21:07,740 INFO  L82        PathProgramCache]: Analyzing trace with hash 810066552, now seen corresponding path program 1 times
[2020-08-22 17:21:07,740 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:21:07,740 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191667379]
[2020-08-22 17:21:07,740 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:21:07,807 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:21:08,654 WARN  L193               SmtUtils]: Spent 403.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:21:08,655 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:21:08,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:21:08,754 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:21:08,754 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191667379]
[2020-08-22 17:21:08,754 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:21:08,755 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:21:08,755 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251817236]
[2020-08-22 17:21:08,755 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:21:08,755 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:21:08,755 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:21:08,756 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:21:08,756 INFO  L87              Difference]: Start difference. First operand 202790 states and 308996 transitions. Second operand 4 states.
[2020-08-22 17:21:54,431 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:21:54,431 INFO  L93              Difference]: Finished difference Result 592389 states and 901493 transitions.
[2020-08-22 17:21:54,432 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:21:54,433 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 343
[2020-08-22 17:21:54,433 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:21:55,056 INFO  L225             Difference]: With dead ends: 592389
[2020-08-22 17:21:55,056 INFO  L226             Difference]: Without dead ends: 394839
[2020-08-22 17:21:55,237 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:21:55,536 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 394839 states.
[2020-08-22 17:22:33,697 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 394839 to 394837.
[2020-08-22 17:22:33,698 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 394837 states.
[2020-08-22 17:22:34,379 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 394837 states to 394837 states and 597833 transitions.
[2020-08-22 17:22:34,379 INFO  L78                 Accepts]: Start accepts. Automaton has 394837 states and 597833 transitions. Word has length 343
[2020-08-22 17:22:34,379 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:22:34,379 INFO  L479      AbstractCegarLoop]: Abstraction has 394837 states and 597833 transitions.
[2020-08-22 17:22:34,379 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:22:34,379 INFO  L276                IsEmpty]: Start isEmpty. Operand 394837 states and 597833 transitions.
[2020-08-22 17:22:35,494 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 346
[2020-08-22 17:22:35,494 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:22:35,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:22:35,494 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21
[2020-08-22 17:22:35,494 INFO  L427      AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:22:35,495 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:22:35,495 INFO  L82        PathProgramCache]: Analyzing trace with hash 1897294648, now seen corresponding path program 1 times
[2020-08-22 17:22:35,495 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:22:35,495 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310761270]
[2020-08-22 17:22:35,495 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:22:35,552 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:22:36,109 WARN  L193               SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:22:36,110 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:22:36,115 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:22:36,246 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:22:36,246 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310761270]
[2020-08-22 17:22:36,246 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:22:36,246 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 17:22:36,247 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489957613]
[2020-08-22 17:22:36,247 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 17:22:36,247 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:22:36,248 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 17:22:36,248 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:22:36,248 INFO  L87              Difference]: Start difference. First operand 394837 states and 597833 transitions. Second operand 4 states.
[2020-08-22 17:23:54,717 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 17:23:54,717 INFO  L93              Difference]: Finished difference Result 1142997 states and 1728165 transitions.
[2020-08-22 17:23:54,718 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-22 17:23:54,718 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 345
[2020-08-22 17:23:54,719 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 17:23:55,943 INFO  L225             Difference]: With dead ends: 1142997
[2020-08-22 17:23:55,943 INFO  L226             Difference]: Without dead ends: 750942
[2020-08-22 17:23:56,309 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 17:23:56,891 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 750942 states.
[2020-08-22 17:25:23,926 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 750942 to 750940.
[2020-08-22 17:25:23,926 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 750940 states.
[2020-08-22 17:25:25,162 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 750940 states to 750940 states and 1127437 transitions.
[2020-08-22 17:25:25,162 INFO  L78                 Accepts]: Start accepts. Automaton has 750940 states and 1127437 transitions. Word has length 345
[2020-08-22 17:25:25,162 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 17:25:25,163 INFO  L479      AbstractCegarLoop]: Abstraction has 750940 states and 1127437 transitions.
[2020-08-22 17:25:25,163 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 17:25:25,163 INFO  L276                IsEmpty]: Start isEmpty. Operand 750940 states and 1127437 transitions.
[2020-08-22 17:25:25,498 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 346
[2020-08-22 17:25:25,498 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 17:25:25,498 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 17:25:25,499 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22
[2020-08-22 17:25:25,499 INFO  L427      AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 17:25:25,499 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 17:25:25,499 INFO  L82        PathProgramCache]: Analyzing trace with hash 1956235936, now seen corresponding path program 1 times
[2020-08-22 17:25:25,499 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 17:25:25,500 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821030180]
[2020-08-22 17:25:25,500 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 17:25:25,631 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:25:26,158 WARN  L193               SmtUtils]: Spent 410.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-22 17:25:26,160 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 17:25:26,164 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 17:25:26,257 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 17:25:26,257 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821030180]
[2020-08-22 17:25:26,257 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 17:25:26,258 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-22 17:25:26,258 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820830714]
[2020-08-22 17:25:26,258 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-22 17:25:26,259 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 17:25:26,259 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-22 17:25:26,259 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-22 17:25:26,259 INFO  L87              Difference]: Start difference. First operand 750940 states and 1127437 transitions. Second operand 5 states.