/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=SMALLESTAMONGWIDE --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.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-19 04:33:59,233 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-19 04:33:59,236 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-19 04:33:59,261 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-19 04:33:59,261 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-19 04:33:59,263 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-19 04:33:59,264 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-19 04:33:59,266 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-19 04:33:59,268 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-19 04:33:59,269 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-19 04:33:59,270 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-19 04:33:59,271 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-19 04:33:59,271 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-19 04:33:59,272 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-19 04:33:59,273 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-19 04:33:59,274 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-19 04:33:59,275 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-19 04:33:59,276 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-19 04:33:59,278 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-19 04:33:59,280 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-19 04:33:59,281 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-19 04:33:59,283 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-19 04:33:59,284 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-19 04:33:59,285 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-19 04:33:59,287 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-19 04:33:59,288 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-19 04:33:59,288 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-19 04:33:59,289 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-19 04:33:59,289 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-19 04:33:59,290 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-19 04:33:59,290 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-19 04:33:59,291 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-19 04:33:59,292 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-19 04:33:59,293 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-19 04:33:59,294 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-19 04:33:59,294 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-19 04:33:59,295 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-19 04:33:59,295 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-19 04:33:59,295 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-19 04:33:59,297 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-19 04:33:59,298 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
[2020-08-19 04:33:59,321 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-19 04:33:59,322 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-19 04:33:59,323 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-19 04:33:59,323 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-19 04:33:59,324 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-19 04:33:59,324 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-19 04:33:59,324 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-19 04:33:59,324 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-19 04:33:59,324 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-19 04:33:59,325 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-19 04:33:59,325 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-19 04:33:59,325 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-19 04:33:59,325 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-19 04:33:59,325 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-19 04:33:59,326 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-19 04:33:59,326 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-19 04:33:59,326 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-19 04:33:59,326 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-19 04:33:59,326 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-19 04:33:59,327 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-19 04:33:59,327 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-19 04:33:59,327 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-19 04:33:59,327 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-19 04:33:59,328 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-19 04:33:59,328 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-19 04:33:59,328 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-19 04:33:59,328 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-19 04:33:59,328 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-19 04:33:59,329 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-19 04:33:59,329 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=SMALLESTAMONGWIDE;tolerance=0.2;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;
[2020-08-19 04:33:59,671 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-19 04:33:59,684 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-19 04:33:59,687 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-19 04:33:59,689 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-19 04:33:59,689 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-19 04:33:59,690 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c
[2020-08-19 04:33:59,752 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8102713ea/aeae303265bb422c877eaf1d179eac2e/FLAG4fb9519e5
[2020-08-19 04:34:00,518 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-19 04:34:00,518 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c
[2020-08-19 04:34:00,555 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8102713ea/aeae303265bb422c877eaf1d179eac2e/FLAG4fb9519e5
[2020-08-19 04:34:00,607 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8102713ea/aeae303265bb422c877eaf1d179eac2e
[2020-08-19 04:34:00,617 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-19 04:34:00,619 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-19 04:34:00,620 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-19 04:34:00,621 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-19 04:34:00,624 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-19 04:34:00,625 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:34:00" (1/1) ...
[2020-08-19 04:34:00,628 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f066e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:00, skipping insertion in model container
[2020-08-19 04:34:00,628 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:34:00" (1/1) ...
[2020-08-19 04:34:00,636 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-19 04:34:00,835 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-19 04:34:02,706 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-19 04:34:02,721 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-19 04:34:03,905 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-19 04:34:03,946 INFO  L208         MainTranslator]: Completed translation
[2020-08-19 04:34:03,948 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03 WrapperNode
[2020-08-19 04:34:03,948 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-19 04:34:03,949 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-19 04:34:03,949 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-19 04:34:03,949 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-19 04:34:03,964 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03" (1/1) ...
[2020-08-19 04:34:03,966 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03" (1/1) ...
[2020-08-19 04:34:04,031 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03" (1/1) ...
[2020-08-19 04:34:04,032 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03" (1/1) ...
[2020-08-19 04:34:04,098 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03" (1/1) ...
[2020-08-19 04:34:04,144 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03" (1/1) ...
[2020-08-19 04:34:04,172 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03" (1/1) ...
[2020-08-19 04:34:04,206 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-19 04:34:04,207 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-19 04:34:04,207 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-19 04:34:04,208 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-19 04:34:04,209 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03" (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
[2020-08-19 04:34:04,290 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-19 04:34:04,290 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-19 04:34:04,291 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-19 04:34:04,291 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-19 04:34:04,292 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-19 04:34:04,292 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-19 04:34:04,293 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-19 04:34:04,294 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-19 04:34:04,294 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-19 04:34:04,295 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-19 04:34:04,295 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-19 04:34:04,296 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-19 04:34:04,296 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-19 04:34:04,296 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-19 04:34:04,296 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-19 04:34:04,297 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-19 04:34:04,297 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2020-08-19 04:34:04,298 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-19 04:34:04,298 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-19 04:34:04,298 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-19 04:34:04,298 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-19 04:34:04,299 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-19 04:34:08,560 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-19 04:34:08,561 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-19 04:34:08,576 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:34:08 BoogieIcfgContainer
[2020-08-19 04:34:08,576 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-19 04:34:08,577 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-19 04:34:08,577 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-19 04:34:08,581 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-19 04:34:08,581 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:34:00" (1/3) ...
[2020-08-19 04:34:08,582 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610e4264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:34:08, skipping insertion in model container
[2020-08-19 04:34:08,582 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:34:03" (2/3) ...
[2020-08-19 04:34:08,583 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@610e4264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:34:08, skipping insertion in model container
[2020-08-19 04:34:08,583 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:34:08" (3/3) ...
[2020-08-19 04:34:08,585 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c
[2020-08-19 04:34:08,596 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-19 04:34:08,606 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations.
[2020-08-19 04:34:08,621 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2020-08-19 04:34:08,658 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-19 04:34:08,659 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-19 04:34:08,659 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-19 04:34:08,659 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-19 04:34:08,659 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-19 04:34:08,659 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-19 04:34:08,659 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-19 04:34:08,660 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-19 04:34:08,710 INFO  L276                IsEmpty]: Start isEmpty. Operand 1484 states.
[2020-08-19 04:34:08,750 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 485
[2020-08-19 04:34:08,750 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 04:34:08,752 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 04:34:08,753 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 04:34:08,759 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 04:34:08,760 INFO  L82        PathProgramCache]: Analyzing trace with hash -1064488228, now seen corresponding path program 1 times
[2020-08-19 04:34:08,770 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 04:34:08,770 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721134235]
[2020-08-19 04:34:08,771 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 04:34:10,879 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 04:34:12,226 WARN  L193               SmtUtils]: Spent 825.00 ms on a formula simplification that was a NOOP. DAG size: 406
[2020-08-19 04:34:12,230 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 04:34:12,241 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 04:34:12,977 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 04:34:12,979 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721134235]
[2020-08-19 04:34:12,981 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 04:34:12,982 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-19 04:34:12,983 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368670466]
[2020-08-19 04:34:12,994 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-19 04:34:12,995 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 04:34:13,009 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-19 04:34:13,011 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-19 04:34:13,014 INFO  L87              Difference]: Start difference. First operand 1484 states. Second operand 5 states.
[2020-08-19 04:34:30,177 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 04:34:30,178 INFO  L93              Difference]: Finished difference Result 4394 states and 7936 transitions.
[2020-08-19 04:34:30,180 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-19 04:34:30,181 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 484
[2020-08-19 04:34:30,183 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 04:34:30,236 INFO  L225             Difference]: With dead ends: 4394
[2020-08-19 04:34:30,236 INFO  L226             Difference]: Without dead ends: 2919
[2020-08-19 04:34:30,250 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-19 04:34:30,279 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2919 states.
[2020-08-19 04:34:30,458 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865.
[2020-08-19 04:34:30,459 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2865 states.
[2020-08-19 04:34:30,472 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4721 transitions.
[2020-08-19 04:34:30,474 INFO  L78                 Accepts]: Start accepts. Automaton has 2865 states and 4721 transitions. Word has length 484
[2020-08-19 04:34:30,475 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 04:34:30,476 INFO  L479      AbstractCegarLoop]: Abstraction has 2865 states and 4721 transitions.
[2020-08-19 04:34:30,476 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-19 04:34:30,476 INFO  L276                IsEmpty]: Start isEmpty. Operand 2865 states and 4721 transitions.
[2020-08-19 04:34:30,494 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 487
[2020-08-19 04:34:30,494 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 04:34:30,495 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 04:34:30,495 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-19 04:34:30,495 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 04:34:30,496 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 04:34:30,496 INFO  L82        PathProgramCache]: Analyzing trace with hash 1721765960, now seen corresponding path program 1 times
[2020-08-19 04:34:30,496 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 04:34:30,497 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1796395459]
[2020-08-19 04:34:30,497 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 04:34:30,808 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 04:34:31,766 WARN  L193               SmtUtils]: Spent 716.00 ms on a formula simplification that was a NOOP. DAG size: 406
[2020-08-19 04:34:31,768 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 04:34:31,777 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 04:34:32,120 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 04:34:32,121 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1796395459]
[2020-08-19 04:34:32,121 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 04:34:32,122 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 04:34:32,122 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371853726]
[2020-08-19 04:34:32,124 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 04:34:32,125 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 04:34:32,125 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 04:34:32,125 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 04:34:32,125 INFO  L87              Difference]: Start difference. First operand 2865 states and 4721 transitions. Second operand 4 states.
[2020-08-19 04:34:52,759 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-19 04:34:52,760 INFO  L93              Difference]: Finished difference Result 8316 states and 13666 transitions.
[2020-08-19 04:34:52,761 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-19 04:34:52,761 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 486
[2020-08-19 04:34:52,768 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-19 04:34:52,806 INFO  L225             Difference]: With dead ends: 8316
[2020-08-19 04:34:52,806 INFO  L226             Difference]: Without dead ends: 5665
[2020-08-19 04:34:52,813 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 04:34:52,823 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5665 states.
[2020-08-19 04:34:53,025 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613.
[2020-08-19 04:34:53,026 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5613 states.
[2020-08-19 04:34:53,046 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9225 transitions.
[2020-08-19 04:34:53,046 INFO  L78                 Accepts]: Start accepts. Automaton has 5613 states and 9225 transitions. Word has length 486
[2020-08-19 04:34:53,047 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-19 04:34:53,047 INFO  L479      AbstractCegarLoop]: Abstraction has 5613 states and 9225 transitions.
[2020-08-19 04:34:53,047 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-19 04:34:53,048 INFO  L276                IsEmpty]: Start isEmpty. Operand 5613 states and 9225 transitions.
[2020-08-19 04:34:53,125 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 488
[2020-08-19 04:34:53,125 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-19 04:34:53,128 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-19 04:34:53,136 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-19 04:34:53,136 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-19 04:34:53,137 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-19 04:34:53,140 INFO  L82        PathProgramCache]: Analyzing trace with hash 326918239, now seen corresponding path program 1 times
[2020-08-19 04:34:53,140 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-19 04:34:53,140 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085789798]
[2020-08-19 04:34:53,141 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-19 04:34:53,235 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 04:34:54,154 WARN  L193               SmtUtils]: Spent 747.00 ms on a formula simplification that was a NOOP. DAG size: 406
[2020-08-19 04:34:54,159 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-19 04:34:54,168 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-19 04:34:54,342 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-19 04:34:54,343 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085789798]
[2020-08-19 04:34:54,344 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-19 04:34:54,344 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-19 04:34:54,344 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218714263]
[2020-08-19 04:34:54,345 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-19 04:34:54,346 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-19 04:34:54,346 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-19 04:34:54,346 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-19 04:34:54,346 INFO  L87              Difference]: Start difference. First operand 5613 states and 9225 transitions. Second operand 4 states.