/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -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 0.1.25-5644d1e-m
[2020-08-18 23:42:12,136 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 23:42:12,139 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 23:42:12,165 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 23:42:12,165 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 23:42:12,166 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 23:42:12,168 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 23:42:12,170 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 23:42:12,172 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 23:42:12,173 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 23:42:12,174 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 23:42:12,175 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 23:42:12,175 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 23:42:12,176 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 23:42:12,177 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 23:42:12,178 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 23:42:12,179 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 23:42:12,180 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 23:42:12,182 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 23:42:12,184 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 23:42:12,186 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 23:42:12,187 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 23:42:12,189 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 23:42:12,189 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 23:42:12,192 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 23:42:12,193 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 23:42:12,193 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 23:42:12,195 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 23:42:12,196 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 23:42:12,197 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 23:42:12,197 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 23:42:12,198 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 23:42:12,199 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 23:42:12,200 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 23:42:12,201 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 23:42:12,201 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 23:42:12,202 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 23:42:12,202 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 23:42:12,202 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 23:42:12,203 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 23:42:12,204 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 23:42:12,205 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 23:42:12,228 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 23:42:12,229 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 23:42:12,230 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 23:42:12,230 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 23:42:12,230 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 23:42:12,231 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 23:42:12,231 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 23:42:12,231 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 23:42:12,231 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 23:42:12,232 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 23:42:12,232 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 23:42:12,232 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 23:42:12,232 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 23:42:12,232 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 23:42:12,232 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 23:42:12,233 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 23:42:12,233 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 23:42:12,233 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 23:42:12,233 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 23:42:12,233 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 23:42:12,234 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 23:42:12,234 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 23:42:12,234 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 23:42:12,234 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 23:42:12,235 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 23:42:12,235 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 23:42:12,235 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 23:42:12,235 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 23:42:12,235 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 23:42:12,236 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=WIDESTAMONGSMALL;tolerance=0.2;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;
[2020-08-18 23:42:12,541 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 23:42:12,565 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 23:42:12,574 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 23:42:12,576 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 23:42:12,577 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 23:42:12,578 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 23:42:12,664 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c85539b59/b33f6c49afd94e248a1fcaf5dd313625/FLAG9cc31fd73
[2020-08-18 23:42:13,437 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 23:42:13,438 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 23:42:13,460 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c85539b59/b33f6c49afd94e248a1fcaf5dd313625/FLAG9cc31fd73
[2020-08-18 23:42:13,514 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c85539b59/b33f6c49afd94e248a1fcaf5dd313625
[2020-08-18 23:42:13,522 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 23:42:13,524 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 23:42:13,525 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 23:42:13,525 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 23:42:13,529 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 23:42:13,530 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:42:13" (1/1) ...
[2020-08-18 23:42:13,533 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@701ef800 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:13, skipping insertion in model container
[2020-08-18 23:42:13,533 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:42:13" (1/1) ...
[2020-08-18 23:42:13,541 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 23:42:13,645 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 23:42:14,733 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 23:42:14,746 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 23:42:15,211 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 23:42:15,252 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 23:42:15,253 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15 WrapperNode
[2020-08-18 23:42:15,254 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 23:42:15,256 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 23:42:15,256 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 23:42:15,256 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 23:42:15,273 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15" (1/1) ...
[2020-08-18 23:42:15,275 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15" (1/1) ...
[2020-08-18 23:42:15,319 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15" (1/1) ...
[2020-08-18 23:42:15,319 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15" (1/1) ...
[2020-08-18 23:42:15,363 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15" (1/1) ...
[2020-08-18 23:42:15,401 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15" (1/1) ...
[2020-08-18 23:42:15,409 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15" (1/1) ...
[2020-08-18 23:42:15,423 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 23:42:15,424 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 23:42:15,424 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 23:42:15,424 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 23:42:15,425 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15" (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 23:42:15,496 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 23:42:15,496 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 23:42:15,497 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-18 23:42:15,497 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 23:42:15,498 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 23:42:15,498 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-18 23:42:15,499 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-18 23:42:15,499 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-18 23:42:15,500 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-18 23:42:15,501 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 23:42:15,501 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-18 23:42:15,501 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-18 23:42:15,501 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-18 23:42:15,502 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-18 23:42:15,502 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-18 23:42:15,503 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-18 23:42:15,503 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-18 23:42:15,503 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-18 23:42:15,503 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-18 23:42:15,504 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 23:42:15,504 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 23:42:15,505 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 23:42:18,120 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 23:42:18,121 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-18 23:42:18,136 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:42:18 BoogieIcfgContainer
[2020-08-18 23:42:18,136 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 23:42:18,138 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 23:42:18,138 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 23:42:18,141 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 23:42:18,142 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:42:13" (1/3) ...
[2020-08-18 23:42:18,143 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160de751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:42:18, skipping insertion in model container
[2020-08-18 23:42:18,143 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:42:15" (2/3) ...
[2020-08-18 23:42:18,144 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@160de751 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:42:18, skipping insertion in model container
[2020-08-18 23:42:18,144 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:42:18" (3/3) ...
[2020-08-18 23:42:18,146 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c
[2020-08-18 23:42:18,157 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 23:42:18,173 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 23:42:18,187 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 23:42:18,221 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 23:42:18,222 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 23:42:18,222 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 23:42:18,222 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 23:42:18,222 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 23:42:18,222 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 23:42:18,222 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 23:42:18,223 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 23:42:18,262 INFO  L276                IsEmpty]: Start isEmpty. Operand 808 states.
[2020-08-18 23:42:18,300 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 23:42:18,300 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:42:18,302 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]
[2020-08-18 23:42:18,302 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:42:18,307 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:42:18,308 INFO  L82        PathProgramCache]: Analyzing trace with hash 1078138388, now seen corresponding path program 1 times
[2020-08-18 23:42:18,317 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:42:18,317 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030555369]
[2020-08-18 23:42:18,318 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:42:19,134 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:20,146 WARN  L193               SmtUtils]: Spent 503.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 23:42:20,158 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:42:20,166 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:20,454 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 23:42:20,455 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030555369]
[2020-08-18 23:42:20,457 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:42:20,458 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 23:42:20,459 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056239918]
[2020-08-18 23:42:20,468 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 23:42:20,468 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:42:20,484 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 23:42:20,485 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 23:42:20,488 INFO  L87              Difference]: Start difference. First operand 808 states. Second operand 4 states.
[2020-08-18 23:42:20,990 WARN  L193               SmtUtils]: Spent 417.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 23:42:26,094 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:42:26,095 INFO  L93              Difference]: Finished difference Result 1527 states and 2683 transitions.
[2020-08-18 23:42:26,096 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 23:42:26,098 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 23:42:26,101 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:42:26,129 INFO  L225             Difference]: With dead ends: 1527
[2020-08-18 23:42:26,129 INFO  L226             Difference]: Without dead ends: 1311
[2020-08-18 23:42:26,137 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-18 23:42:26,158 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1311 states.
[2020-08-18 23:42:26,267 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1309.
[2020-08-18 23:42:26,268 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1309 states.
[2020-08-18 23:42:26,275 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2040 transitions.
[2020-08-18 23:42:26,277 INFO  L78                 Accepts]: Start accepts. Automaton has 1309 states and 2040 transitions. Word has length 330
[2020-08-18 23:42:26,278 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:42:26,278 INFO  L479      AbstractCegarLoop]: Abstraction has 1309 states and 2040 transitions.
[2020-08-18 23:42:26,279 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 23:42:26,279 INFO  L276                IsEmpty]: Start isEmpty. Operand 1309 states and 2040 transitions.
[2020-08-18 23:42:26,286 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 23:42:26,287 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:42:26,287 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]
[2020-08-18 23:42:26,288 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 23:42:26,288 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:42:26,288 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:42:26,288 INFO  L82        PathProgramCache]: Analyzing trace with hash 1867298226, now seen corresponding path program 1 times
[2020-08-18 23:42:26,289 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:42:26,289 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740326590]
[2020-08-18 23:42:26,289 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:42:26,533 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:27,125 WARN  L193               SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 23:42:27,128 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:42:27,140 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:27,392 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 23:42:27,393 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740326590]
[2020-08-18 23:42:27,395 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:42:27,395 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 23:42:27,395 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407022888]
[2020-08-18 23:42:27,400 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 23:42:27,401 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:42:27,401 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 23:42:27,401 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 23:42:27,402 INFO  L87              Difference]: Start difference. First operand 1309 states and 2040 transitions. Second operand 4 states.
[2020-08-18 23:42:27,890 WARN  L193               SmtUtils]: Spent 431.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 23:42:32,566 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:42:32,567 INFO  L93              Difference]: Finished difference Result 2683 states and 4213 transitions.
[2020-08-18 23:42:32,567 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 23:42:32,567 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 23:42:32,570 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:42:32,584 INFO  L225             Difference]: With dead ends: 2683
[2020-08-18 23:42:32,585 INFO  L226             Difference]: Without dead ends: 2301
[2020-08-18 23:42:32,592 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
[2020-08-18 23:42:32,597 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2301 states.
[2020-08-18 23:42:32,674 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 2299.
[2020-08-18 23:42:32,675 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2299 states.
[2020-08-18 23:42:32,687 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2299 states to 2299 states and 3576 transitions.
[2020-08-18 23:42:32,688 INFO  L78                 Accepts]: Start accepts. Automaton has 2299 states and 3576 transitions. Word has length 330
[2020-08-18 23:42:32,690 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:42:32,690 INFO  L479      AbstractCegarLoop]: Abstraction has 2299 states and 3576 transitions.
[2020-08-18 23:42:32,690 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 23:42:32,690 INFO  L276                IsEmpty]: Start isEmpty. Operand 2299 states and 3576 transitions.
[2020-08-18 23:42:32,699 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 23:42:32,703 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:42:32,703 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]
[2020-08-18 23:42:32,704 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 23:42:32,704 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:42:32,704 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:42:32,705 INFO  L82        PathProgramCache]: Analyzing trace with hash -1297523319, now seen corresponding path program 1 times
[2020-08-18 23:42:32,706 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:42:32,706 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271202175]
[2020-08-18 23:42:32,706 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:42:32,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:33,552 WARN  L193               SmtUtils]: Spent 393.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 23:42:33,554 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:42:33,560 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:33,738 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 23:42:33,739 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271202175]
[2020-08-18 23:42:33,739 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:42:33,740 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 23:42:33,740 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651997476]
[2020-08-18 23:42:33,741 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 23:42:33,741 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:42:33,741 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 23:42:33,742 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 23:42:33,743 INFO  L87              Difference]: Start difference. First operand 2299 states and 3576 transitions. Second operand 4 states.
[2020-08-18 23:42:34,162 WARN  L193               SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 278
[2020-08-18 23:42:38,452 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:42:38,453 INFO  L93              Difference]: Finished difference Result 4867 states and 7634 transitions.
[2020-08-18 23:42:38,453 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 23:42:38,453 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 330
[2020-08-18 23:42:38,455 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:42:38,478 INFO  L225             Difference]: With dead ends: 4867
[2020-08-18 23:42:38,478 INFO  L226             Difference]: Without dead ends: 4201
[2020-08-18 23:42:38,482 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
[2020-08-18 23:42:38,488 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 4201 states.
[2020-08-18 23:42:38,642 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 4199.
[2020-08-18 23:42:38,643 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 4199 states.
[2020-08-18 23:42:38,660 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 4199 states to 4199 states and 6516 transitions.
[2020-08-18 23:42:38,660 INFO  L78                 Accepts]: Start accepts. Automaton has 4199 states and 6516 transitions. Word has length 330
[2020-08-18 23:42:38,661 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:42:38,662 INFO  L479      AbstractCegarLoop]: Abstraction has 4199 states and 6516 transitions.
[2020-08-18 23:42:38,662 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 23:42:38,662 INFO  L276                IsEmpty]: Start isEmpty. Operand 4199 states and 6516 transitions.
[2020-08-18 23:42:38,683 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 331
[2020-08-18 23:42:38,684 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:42:38,684 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]
[2020-08-18 23:42:38,685 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 23:42:38,685 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:42:38,685 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:42:38,686 INFO  L82        PathProgramCache]: Analyzing trace with hash 1852614154, now seen corresponding path program 1 times
[2020-08-18 23:42:38,686 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:42:38,686 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446085775]
[2020-08-18 23:42:38,687 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:42:39,165 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:39,796 WARN  L193               SmtUtils]: Spent 458.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 23:42:39,798 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:42:39,804 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:40,005 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 23:42:40,005 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446085775]
[2020-08-18 23:42:40,005 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:42:40,006 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-18 23:42:40,006 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032435108]
[2020-08-18 23:42:40,007 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-18 23:42:40,007 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:42:40,007 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-18 23:42:40,008 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-18 23:42:40,008 INFO  L87              Difference]: Start difference. First operand 4199 states and 6516 transitions. Second operand 5 states.
[2020-08-18 23:42:46,829 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:42:46,829 INFO  L93              Difference]: Finished difference Result 12414 states and 19245 transitions.
[2020-08-18 23:42:46,830 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-18 23:42:46,830 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 330
[2020-08-18 23:42:46,830 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:42:46,873 INFO  L225             Difference]: With dead ends: 12414
[2020-08-18 23:42:46,873 INFO  L226             Difference]: Without dead ends: 8230
[2020-08-18 23:42:46,883 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 23:42:46,892 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 8230 states.
[2020-08-18 23:42:47,205 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 8230 to 8228.
[2020-08-18 23:42:47,206 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 8228 states.
[2020-08-18 23:42:47,235 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 8228 states to 8228 states and 12694 transitions.
[2020-08-18 23:42:47,235 INFO  L78                 Accepts]: Start accepts. Automaton has 8228 states and 12694 transitions. Word has length 330
[2020-08-18 23:42:47,235 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:42:47,235 INFO  L479      AbstractCegarLoop]: Abstraction has 8228 states and 12694 transitions.
[2020-08-18 23:42:47,236 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-18 23:42:47,236 INFO  L276                IsEmpty]: Start isEmpty. Operand 8228 states and 12694 transitions.
[2020-08-18 23:42:47,256 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-18 23:42:47,256 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:42:47,257 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]
[2020-08-18 23:42:47,258 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 23:42:47,258 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:42:47,258 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:42:47,259 INFO  L82        PathProgramCache]: Analyzing trace with hash 569689837, now seen corresponding path program 1 times
[2020-08-18 23:42:47,259 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:42:47,259 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046552296]
[2020-08-18 23:42:47,259 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:42:47,375 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:48,019 WARN  L193               SmtUtils]: Spent 507.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 23:42:48,020 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:42:48,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:48,192 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 23:42:48,192 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046552296]
[2020-08-18 23:42:48,193 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:42:48,193 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 23:42:48,194 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003399747]
[2020-08-18 23:42:48,194 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 23:42:48,195 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:42:48,195 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 23:42:48,195 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 23:42:48,196 INFO  L87              Difference]: Start difference. First operand 8228 states and 12694 transitions. Second operand 4 states.
[2020-08-18 23:42:55,877 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:42:55,878 INFO  L93              Difference]: Finished difference Result 24233 states and 37318 transitions.
[2020-08-18 23:42:55,878 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 23:42:55,878 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-18 23:42:55,879 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:42:55,943 INFO  L225             Difference]: With dead ends: 24233
[2020-08-18 23:42:55,944 INFO  L226             Difference]: Without dead ends: 16134
[2020-08-18 23:42:55,969 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 23:42:55,985 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16134 states.
[2020-08-18 23:42:56,407 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16134 to 16132.
[2020-08-18 23:42:56,407 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16132 states.
[2020-08-18 23:42:56,435 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 24741 transitions.
[2020-08-18 23:42:56,435 INFO  L78                 Accepts]: Start accepts. Automaton has 16132 states and 24741 transitions. Word has length 332
[2020-08-18 23:42:56,436 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:42:56,436 INFO  L479      AbstractCegarLoop]: Abstraction has 16132 states and 24741 transitions.
[2020-08-18 23:42:56,436 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 23:42:56,436 INFO  L276                IsEmpty]: Start isEmpty. Operand 16132 states and 24741 transitions.
[2020-08-18 23:42:56,467 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 333
[2020-08-18 23:42:56,468 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:42:56,468 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]
[2020-08-18 23:42:56,469 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 23:42:56,472 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:42:56,473 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:42:56,473 INFO  L82        PathProgramCache]: Analyzing trace with hash -310142286, now seen corresponding path program 1 times
[2020-08-18 23:42:56,473 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:42:56,474 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123888385]
[2020-08-18 23:42:56,474 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:42:56,520 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:56,966 WARN  L193               SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 23:42:56,968 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:42:56,974 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:42:57,177 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 23:42:57,178 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123888385]
[2020-08-18 23:42:57,179 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:42:57,188 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 23:42:57,188 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511626747]
[2020-08-18 23:42:57,188 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 23:42:57,189 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:42:57,189 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 23:42:57,189 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 23:42:57,189 INFO  L87              Difference]: Start difference. First operand 16132 states and 24741 transitions. Second operand 4 states.
[2020-08-18 23:43:05,845 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:43:05,845 INFO  L93              Difference]: Finished difference Result 48321 states and 74099 transitions.
[2020-08-18 23:43:05,846 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 23:43:05,846 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 332
[2020-08-18 23:43:05,847 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:43:05,915 INFO  L225             Difference]: With dead ends: 48321
[2020-08-18 23:43:05,915 INFO  L226             Difference]: Without dead ends: 32231
[2020-08-18 23:43:05,942 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
[2020-08-18 23:43:05,975 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 32231 states.
[2020-08-18 23:43:06,555 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 32231 to 16151.
[2020-08-18 23:43:06,556 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16151 states.
[2020-08-18 23:43:06,578 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16151 states to 16151 states and 24769 transitions.
[2020-08-18 23:43:06,578 INFO  L78                 Accepts]: Start accepts. Automaton has 16151 states and 24769 transitions. Word has length 332
[2020-08-18 23:43:06,579 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:43:06,579 INFO  L479      AbstractCegarLoop]: Abstraction has 16151 states and 24769 transitions.
[2020-08-18 23:43:06,579 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 23:43:06,579 INFO  L276                IsEmpty]: Start isEmpty. Operand 16151 states and 24769 transitions.
[2020-08-18 23:43:06,612 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 334
[2020-08-18 23:43:06,612 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:43:06,613 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]
[2020-08-18 23:43:06,613 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 23:43:06,613 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:43:06,613 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:43:06,614 INFO  L82        PathProgramCache]: Analyzing trace with hash -1868318850, now seen corresponding path program 1 times
[2020-08-18 23:43:06,614 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:43:06,614 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004446643]
[2020-08-18 23:43:06,614 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:43:06,659 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:43:07,229 WARN  L193               SmtUtils]: Spent 493.00 ms on a formula simplification that was a NOOP. DAG size: 277
[2020-08-18 23:43:07,230 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:43:07,235 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:43:08,039 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 23:43:08,039 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004446643]
[2020-08-18 23:43:08,040 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:43:08,040 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 23:43:08,040 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781701873]
[2020-08-18 23:43:08,041 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 23:43:08,041 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:43:08,041 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 23:43:08,042 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 23:43:08,042 INFO  L87              Difference]: Start difference. First operand 16151 states and 24769 transitions. Second operand 4 states.