/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -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+lhb-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 17:15:20,210 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 17:15:20,213 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 17:15:20,237 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 17:15:20,238 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 17:15:20,239 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 17:15:20,240 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 17:15:20,242 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 17:15:20,244 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 17:15:20,244 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 17:15:20,245 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 17:15:20,246 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 17:15:20,247 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 17:15:20,248 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 17:15:20,249 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 17:15:20,250 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 17:15:20,251 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 17:15:20,252 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 17:15:20,253 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 17:15:20,255 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 17:15:20,257 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 17:15:20,258 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 17:15:20,259 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 17:15:20,260 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 17:15:20,262 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 17:15:20,262 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 17:15:20,262 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 17:15:20,263 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 17:15:20,264 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 17:15:20,265 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 17:15:20,265 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 17:15:20,266 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 17:15:20,267 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 17:15:20,268 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 17:15:20,272 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 17:15:20,272 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 17:15:20,273 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 17:15:20,273 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 17:15:20,273 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 17:15:20,277 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 17:15:20,278 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 17:15:20,279 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-18 17:15:20,323 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 17:15:20,323 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 17:15:20,324 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 17:15:20,325 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 17:15:20,325 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 17:15:20,325 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 17:15:20,325 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 17:15:20,325 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 17:15:20,326 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 17:15:20,326 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 17:15:20,327 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 17:15:20,327 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 17:15:20,328 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 17:15:20,328 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 17:15:20,328 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 17:15:20,328 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 17:15:20,329 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 17:15:20,329 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 17:15:20,329 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 17:15:20,329 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 17:15:20,330 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 17:15:20,330 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 17:15:20,330 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 17:15:20,331 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 17:15:20,331 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 17:15:20,331 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 17:15:20,331 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 17:15:20,331 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 17:15:20,331 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 17:15:20,332 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST;
[2020-08-18 17:15:20,641 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 17:15:20,658 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 17:15:20,663 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 17:15:20,664 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 17:15:20,665 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 17:15:20,666 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 17:15:20,729 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c79b3b9b5/b367f3b3c74a4435b2ae09a27c75d162/FLAGce330222f
[2020-08-18 17:15:21,416 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 17:15:21,417 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 17:15:21,438 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c79b3b9b5/b367f3b3c74a4435b2ae09a27c75d162/FLAGce330222f
[2020-08-18 17:15:21,551 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c79b3b9b5/b367f3b3c74a4435b2ae09a27c75d162
[2020-08-18 17:15:21,562 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 17:15:21,564 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 17:15:21,565 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 17:15:21,565 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 17:15:21,569 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 17:15:21,570 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:15:21" (1/1) ...
[2020-08-18 17:15:21,573 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13d7d7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:21, skipping insertion in model container
[2020-08-18 17:15:21,573 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:15:21" (1/1) ...
[2020-08-18 17:15:21,581 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 17:15:21,755 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 17:15:23,234 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 17:15:23,251 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 17:15:24,711 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 17:15:24,739 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 17:15:24,741 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24 WrapperNode
[2020-08-18 17:15:24,741 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 17:15:24,742 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 17:15:24,743 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 17:15:24,743 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 17:15:24,759 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24" (1/1) ...
[2020-08-18 17:15:24,760 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24" (1/1) ...
[2020-08-18 17:15:24,814 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24" (1/1) ...
[2020-08-18 17:15:24,815 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24" (1/1) ...
[2020-08-18 17:15:24,879 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24" (1/1) ...
[2020-08-18 17:15:24,917 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24" (1/1) ...
[2020-08-18 17:15:24,942 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24" (1/1) ...
[2020-08-18 17:15:24,975 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 17:15:24,975 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 17:15:24,976 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 17:15:24,976 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 17:15:24,977 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 17:15:25,064 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 17:15:25,065 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 17:15:25,065 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 17:15:25,065 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 17:15:25,066 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 17:15:25,066 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 17:15:25,066 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 17:15:25,066 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 17:15:25,067 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 17:15:25,067 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 17:15:25,068 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 17:15:25,068 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 17:15:25,068 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 17:15:25,068 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 17:15:25,069 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 17:15:25,070 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 17:15:25,071 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 17:15:25,071 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 17:15:25,071 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 17:15:25,072 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 17:15:25,072 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 17:15:25,072 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 17:15:28,592 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 17:15:28,593 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 17:15:28,610 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:15:28 BoogieIcfgContainer
[2020-08-18 17:15:28,611 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 17:15:28,615 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 17:15:28,615 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 17:15:28,619 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 17:15:28,620 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:15:21" (1/3) ...
[2020-08-18 17:15:28,621 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0b6e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:15:28, skipping insertion in model container
[2020-08-18 17:15:28,622 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:15:24" (2/3) ...
[2020-08-18 17:15:28,622 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c0b6e4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:15:28, skipping insertion in model container
[2020-08-18 17:15:28,623 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:15:28" (3/3) ...
[2020-08-18 17:15:28,625 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-18 17:15:28,637 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 17:15:28,651 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 12 error locations.
[2020-08-18 17:15:28,668 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 12 error locations.
[2020-08-18 17:15:28,706 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 17:15:28,707 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 17:15:28,708 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 17:15:28,708 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 17:15:28,708 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 17:15:28,709 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 17:15:28,709 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 17:15:28,709 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 17:15:28,760 INFO  L276                IsEmpty]: Start isEmpty. Operand 1016 states.
[2020-08-18 17:15:28,801 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-18 17:15:28,803 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 17:15:28,805 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]
[2020-08-18 17:15:28,805 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 17:15:28,812 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 17:15:28,813 INFO  L82        PathProgramCache]: Analyzing trace with hash -179235525, now seen corresponding path program 1 times
[2020-08-18 17:15:28,823 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 17:15:28,824 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981374117]
[2020-08-18 17:15:28,824 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 17:15:29,685 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:15:30,891 WARN  L193               SmtUtils]: Spent 727.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 17:15:30,893 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 17:15:30,900 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:15:31,131 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 17:15:31,132 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981374117]
[2020-08-18 17:15:31,134 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 17:15:31,134 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 17:15:31,135 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986770855]
[2020-08-18 17:15:31,143 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 17:15:31,144 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 17:15:31,158 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 17:15:31,159 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 17:15:31,161 INFO  L87              Difference]: Start difference. First operand 1016 states. Second operand 4 states.
[2020-08-18 17:15:31,763 WARN  L193               SmtUtils]: Spent 522.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 17:15:39,275 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 17:15:39,276 INFO  L93              Difference]: Finished difference Result 1776 states and 3147 transitions.
[2020-08-18 17:15:39,277 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 17:15:39,279 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 324
[2020-08-18 17:15:39,281 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 17:15:39,311 INFO  L225             Difference]: With dead ends: 1776
[2020-08-18 17:15:39,311 INFO  L226             Difference]: Without dead ends: 1481
[2020-08-18 17:15:39,318 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 17:15:39,341 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1481 states.
[2020-08-18 17:15:39,445 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1479.
[2020-08-18 17:15:39,447 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1479 states.
[2020-08-18 17:15:39,455 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1479 states to 1479 states and 2266 transitions.
[2020-08-18 17:15:39,457 INFO  L78                 Accepts]: Start accepts. Automaton has 1479 states and 2266 transitions. Word has length 324
[2020-08-18 17:15:39,459 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 17:15:39,459 INFO  L479      AbstractCegarLoop]: Abstraction has 1479 states and 2266 transitions.
[2020-08-18 17:15:39,459 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 17:15:39,459 INFO  L276                IsEmpty]: Start isEmpty. Operand 1479 states and 2266 transitions.
[2020-08-18 17:15:39,466 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-18 17:15:39,467 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 17:15:39,467 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]
[2020-08-18 17:15:39,468 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 17:15:39,468 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 17:15:39,468 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 17:15:39,469 INFO  L82        PathProgramCache]: Analyzing trace with hash -220420006, now seen corresponding path program 1 times
[2020-08-18 17:15:39,469 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 17:15:39,469 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320634252]
[2020-08-18 17:15:39,470 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 17:15:39,710 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:15:40,586 WARN  L193               SmtUtils]: Spent 693.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 17:15:40,588 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 17:15:40,599 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:15:40,895 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 17:15:40,896 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320634252]
[2020-08-18 17:15:40,897 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 17:15:40,897 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 17:15:40,897 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074949961]
[2020-08-18 17:15:40,902 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 17:15:40,903 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 17:15:40,903 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 17:15:40,904 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 17:15:40,904 INFO  L87              Difference]: Start difference. First operand 1479 states and 2266 transitions. Second operand 4 states.
[2020-08-18 17:15:41,606 WARN  L193               SmtUtils]: Spent 638.00 ms on a formula simplification that was a NOOP. DAG size: 323
[2020-08-18 17:15:48,505 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 17:15:48,505 INFO  L93              Difference]: Finished difference Result 2852 states and 4423 transitions.
[2020-08-18 17:15:48,510 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 17:15:48,510 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 324
[2020-08-18 17:15:48,512 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 17:15:48,524 INFO  L225             Difference]: With dead ends: 2852
[2020-08-18 17:15:48,524 INFO  L226             Difference]: Without dead ends: 2439
[2020-08-18 17:15:48,528 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 17:15:48,533 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2439 states.
[2020-08-18 17:15:48,600 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2439 to 2437.
[2020-08-18 17:15:48,600 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2437 states.
[2020-08-18 17:15:48,611 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2437 states to 2437 states and 3757 transitions.
[2020-08-18 17:15:48,611 INFO  L78                 Accepts]: Start accepts. Automaton has 2437 states and 3757 transitions. Word has length 324
[2020-08-18 17:15:48,612 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 17:15:48,612 INFO  L479      AbstractCegarLoop]: Abstraction has 2437 states and 3757 transitions.
[2020-08-18 17:15:48,612 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 17:15:48,613 INFO  L276                IsEmpty]: Start isEmpty. Operand 2437 states and 3757 transitions.
[2020-08-18 17:15:48,620 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 325
[2020-08-18 17:15:48,620 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 17:15:48,621 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]
[2020-08-18 17:15:48,621 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 17:15:48,621 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 17:15:48,622 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 17:15:48,622 INFO  L82        PathProgramCache]: Analyzing trace with hash -578874774, now seen corresponding path program 1 times
[2020-08-18 17:15:48,623 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 17:15:48,623 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115104519]
[2020-08-18 17:15:48,623 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 17:15:49,047 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:15:49,800 WARN  L193               SmtUtils]: Spent 536.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 17:15:49,801 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 17:15:49,815 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:15:50,060 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 17:15:50,060 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115104519]
[2020-08-18 17:15:50,064 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 17:15:50,064 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 17:15:50,064 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734128028]
[2020-08-18 17:15:50,066 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 17:15:50,067 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 17:15:50,067 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 17:15:50,070 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 17:15:50,071 INFO  L87              Difference]: Start difference. First operand 2437 states and 3757 transitions. Second operand 5 states.
[2020-08-18 17:15:59,437 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 17:15:59,437 INFO  L93              Difference]: Finished difference Result 7199 states and 11086 transitions.
[2020-08-18 17:15:59,437 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 17:15:59,438 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 324
[2020-08-18 17:15:59,438 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 17:15:59,460 INFO  L225             Difference]: With dead ends: 7199
[2020-08-18 17:15:59,460 INFO  L226             Difference]: Without dead ends: 4777
[2020-08-18 17:15:59,466 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
[2020-08-18 17:15:59,472 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4777 states.
[2020-08-18 17:15:59,627 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4653.
[2020-08-18 17:15:59,627 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4653 states.
[2020-08-18 17:15:59,643 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 7163 transitions.
[2020-08-18 17:15:59,643 INFO  L78                 Accepts]: Start accepts. Automaton has 4653 states and 7163 transitions. Word has length 324
[2020-08-18 17:15:59,644 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 17:15:59,644 INFO  L479      AbstractCegarLoop]: Abstraction has 4653 states and 7163 transitions.
[2020-08-18 17:15:59,644 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 17:15:59,644 INFO  L276                IsEmpty]: Start isEmpty. Operand 4653 states and 7163 transitions.
[2020-08-18 17:15:59,658 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-18 17:15:59,658 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 17:15:59,658 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]
[2020-08-18 17:15:59,659 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 17:15:59,661 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 17:15:59,662 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 17:15:59,662 INFO  L82        PathProgramCache]: Analyzing trace with hash 76253758, now seen corresponding path program 1 times
[2020-08-18 17:15:59,663 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 17:15:59,663 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164883283]
[2020-08-18 17:15:59,664 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 17:15:59,791 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:16:00,421 WARN  L193               SmtUtils]: Spent 490.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 17:16:00,423 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 17:16:00,429 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:16:00,621 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 17:16:00,622 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164883283]
[2020-08-18 17:16:00,622 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 17:16:00,622 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 17:16:00,622 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797232049]
[2020-08-18 17:16:00,623 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 17:16:00,623 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 17:16:00,623 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 17:16:00,624 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 17:16:00,624 INFO  L87              Difference]: Start difference. First operand 4653 states and 7163 transitions. Second operand 4 states.
[2020-08-18 17:16:11,009 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 17:16:11,010 INFO  L93              Difference]: Finished difference Result 13649 states and 20959 transitions.
[2020-08-18 17:16:11,011 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 17:16:11,011 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 326
[2020-08-18 17:16:11,011 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 17:16:11,051 INFO  L225             Difference]: With dead ends: 13649
[2020-08-18 17:16:11,051 INFO  L226             Difference]: Without dead ends: 9125
[2020-08-18 17:16:11,062 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
[2020-08-18 17:16:11,073 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 9125 states.
[2020-08-18 17:16:11,349 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 9125 to 9001.
[2020-08-18 17:16:11,349 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 9001 states.
[2020-08-18 17:16:11,369 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 13804 transitions.
[2020-08-18 17:16:11,369 INFO  L78                 Accepts]: Start accepts. Automaton has 9001 states and 13804 transitions. Word has length 326
[2020-08-18 17:16:11,370 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 17:16:11,370 INFO  L479      AbstractCegarLoop]: Abstraction has 9001 states and 13804 transitions.
[2020-08-18 17:16:11,370 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 17:16:11,370 INFO  L276                IsEmpty]: Start isEmpty. Operand 9001 states and 13804 transitions.
[2020-08-18 17:16:11,388 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 327
[2020-08-18 17:16:11,389 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 17:16:11,390 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]
[2020-08-18 17:16:11,390 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 17:16:11,391 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr11ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr7ASSERT_VIOLATIONERROR_FUNCTION, mainErr8ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr6ASSERT_VIOLATIONERROR_FUNCTION, mainErr9ASSERT_VIOLATIONERROR_FUNCTION, mainErr5ASSERT_VIOLATIONERROR_FUNCTION, mainErr10ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 17:16:11,391 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 17:16:11,391 INFO  L82        PathProgramCache]: Analyzing trace with hash -1985882685, now seen corresponding path program 1 times
[2020-08-18 17:16:11,392 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 17:16:11,392 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166125154]
[2020-08-18 17:16:11,392 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 17:16:11,446 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:16:12,087 WARN  L193               SmtUtils]: Spent 553.00 ms on a formula simplification that was a NOOP. DAG size: 322
[2020-08-18 17:16:12,088 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 17:16:12,095 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 17:16:12,182 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 17:16:12,183 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166125154]
[2020-08-18 17:16:12,183 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 17:16:12,183 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 17:16:12,183 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206152898]
[2020-08-18 17:16:12,184 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 17:16:12,184 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 17:16:12,185 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 17:16:12,185 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 17:16:12,185 INFO  L87              Difference]: Start difference. First operand 9001 states and 13804 transitions. Second operand 4 states.