/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -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.UNBOUNDED.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-177f698
[2020-08-21 18:19:38,581 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 18:19:38,585 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 18:19:38,627 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 18:19:38,628 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 18:19:38,637 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 18:19:38,638 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-21 18:19:38,642 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-21 18:19:38,643 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-21 18:19:38,645 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-08-21 18:19:38,648 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-21 18:19:38,648 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 18:19:38,652 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 18:19:38,654 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 18:19:38,655 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 18:19:38,657 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 18:19:38,660 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 18:19:38,662 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 18:19:38,667 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 18:19:38,669 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 18:19:38,670 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 18:19:38,671 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 18:19:38,672 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 18:19:38,683 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 18:19:38,683 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 18:19:38,683 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 18:19:38,686 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 18:19:38,687 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 18:19:38,688 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 18:19:38,688 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 18:19:38,688 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 18:19:38,691 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 18:19:38,691 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 18:19:38,692 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 18:19:38,692 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-21 18:19:38,693 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-21 18:19:38,693 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-21 18:19:38,693 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-21 18:19:38,694 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-21 18:19:38,695 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 18:19:38,696 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
[2020-08-21 18:19:38,739 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 18:19:38,740 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 18:19:38,742 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 18:19:38,742 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 18:19:38,742 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 18:19:38,743 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 18:19:38,743 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 18:19:38,743 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 18:19:38,743 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 18:19:38,743 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 18:19:38,744 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 18:19:38,745 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 18:19:38,745 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 18:19:38,746 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 18:19:38,746 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 18:19:38,746 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 18:19:38,746 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 18:19:38,746 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 18:19:38,747 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 18:19:38,747 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 18:19:38,747 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 18:19:38,747 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 18:19:38,747 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 18:19:38,748 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 18:19:38,748 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 18:19:38,748 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 18:19:38,748 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 18:19:38,748 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 18:19:38,749 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 18:19:38,749 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=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true;
[2020-08-21 18:19:39,063 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 18:19:39,084 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 18:19:39,088 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 18:19:39,090 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 18:19:39,090 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 18:19:39,091 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-21 18:19:39,165 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8193f288/ee86fa29eccd409fa57e7b352c13e6ec/FLAGf27c35f62
[2020-08-21 18:19:39,862 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 18:19:39,863 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-21 18:19:39,884 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8193f288/ee86fa29eccd409fa57e7b352c13e6ec/FLAGf27c35f62
[2020-08-21 18:19:40,021 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c8193f288/ee86fa29eccd409fa57e7b352c13e6ec
[2020-08-21 18:19:40,032 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 18:19:40,034 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 18:19:40,037 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 18:19:40,038 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 18:19:40,042 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 18:19:40,043 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:19:40" (1/1) ...
[2020-08-21 18:19:40,046 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2234316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:40, skipping insertion in model container
[2020-08-21 18:19:40,047 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:19:40" (1/1) ...
[2020-08-21 18:19:40,056 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 18:19:40,258 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 18:19:41,835 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 18:19:41,860 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 18:19:43,676 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 18:19:43,737 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 18:19:43,739 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43 WrapperNode
[2020-08-21 18:19:43,740 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 18:19:43,741 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 18:19:43,741 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 18:19:43,741 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 18:19:43,759 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43" (1/1) ...
[2020-08-21 18:19:43,761 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43" (1/1) ...
[2020-08-21 18:19:43,816 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43" (1/1) ...
[2020-08-21 18:19:43,816 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43" (1/1) ...
[2020-08-21 18:19:43,889 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43" (1/1) ...
[2020-08-21 18:19:43,936 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43" (1/1) ...
[2020-08-21 18:19:43,958 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43" (1/1) ...
[2020-08-21 18:19:43,984 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 18:19:43,985 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 18:19:43,985 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 18:19:43,985 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 18:19:43,986 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43" (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
[2020-08-21 18:19:44,083 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 18:19:44,084 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 18:19:44,084 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-08-21 18:19:44,085 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 18:19:44,085 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 18:19:44,085 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-08-21 18:19:44,085 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-08-21 18:19:44,086 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-08-21 18:19:44,086 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-08-21 18:19:44,087 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-21 18:19:44,087 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-08-21 18:19:44,087 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-08-21 18:19:44,087 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-08-21 18:19:44,087 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-08-21 18:19:44,088 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-08-21 18:19:44,089 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-08-21 18:19:44,089 INFO  L130     BoogieDeclarations]: Found specification of procedure node4
[2020-08-21 18:19:44,089 INFO  L130     BoogieDeclarations]: Found specification of procedure node5
[2020-08-21 18:19:44,089 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-08-21 18:19:44,090 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-08-21 18:19:44,090 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 18:19:44,090 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 18:19:44,090 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 18:19:48,633 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 18:19:48,633 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-08-21 18:19:48,647 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:19:48 BoogieIcfgContainer
[2020-08-21 18:19:48,650 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 18:19:48,651 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 18:19:48,651 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 18:19:48,655 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 18:19:48,656 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:19:40" (1/3) ...
[2020-08-21 18:19:48,656 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447a6233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:19:48, skipping insertion in model container
[2020-08-21 18:19:48,657 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:19:43" (2/3) ...
[2020-08-21 18:19:48,658 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@447a6233 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:19:48, skipping insertion in model container
[2020-08-21 18:19:48,658 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:19:48" (3/3) ...
[2020-08-21 18:19:48,660 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-08-21 18:19:48,670 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 18:19:48,687 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations.
[2020-08-21 18:19:48,702 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2020-08-21 18:19:48,733 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 18:19:48,733 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 18:19:48,734 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 18:19:48,734 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 18:19:48,734 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 18:19:48,734 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 18:19:48,734 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 18:19:48,734 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 18:19:48,775 INFO  L276                IsEmpty]: Start isEmpty. Operand 1506 states.
[2020-08-21 18:19:48,812 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 494
[2020-08-21 18:19:48,812 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 18:19:48,814 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, 1, 1, 1, 1, 1, 1]
[2020-08-21 18:19:48,818 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 18:19:48,828 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 18:19:48,831 INFO  L82        PathProgramCache]: Analyzing trace with hash 1738290825, now seen corresponding path program 1 times
[2020-08-21 18:19:48,841 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 18:19:48,842 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710166392]
[2020-08-21 18:19:48,843 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 18:19:50,494 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 18:19:52,109 WARN  L193               SmtUtils]: Spent 1.03 s on a formula simplification that was a NOOP. DAG size: 400
[2020-08-21 18:19:52,111 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 18:19:52,120 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 18:19:52,448 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 18:19:52,449 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710166392]
[2020-08-21 18:19:52,450 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 18:19:52,451 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 18:19:52,452 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774740476]
[2020-08-21 18:19:52,457 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 18:19:52,458 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 18:19:52,470 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 18:19:52,471 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 18:19:52,472 INFO  L87              Difference]: Start difference. First operand 1506 states. Second operand 5 states.
[2020-08-21 18:20:11,608 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 18:20:11,608 INFO  L93              Difference]: Finished difference Result 4460 states and 8053 transitions.
[2020-08-21 18:20:11,609 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-21 18:20:11,611 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 493
[2020-08-21 18:20:11,613 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 18:20:11,653 INFO  L225             Difference]: With dead ends: 4460
[2020-08-21 18:20:11,653 INFO  L226             Difference]: Without dead ends: 2963
[2020-08-21 18:20:11,666 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 18:20:11,688 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2963 states.
[2020-08-21 18:20:11,856 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2963 to 2906.
[2020-08-21 18:20:11,857 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2906 states.
[2020-08-21 18:20:11,873 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2906 states to 2906 states and 4772 transitions.
[2020-08-21 18:20:11,875 INFO  L78                 Accepts]: Start accepts. Automaton has 2906 states and 4772 transitions. Word has length 493
[2020-08-21 18:20:11,881 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 18:20:11,881 INFO  L479      AbstractCegarLoop]: Abstraction has 2906 states and 4772 transitions.
[2020-08-21 18:20:11,881 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 18:20:11,881 INFO  L276                IsEmpty]: Start isEmpty. Operand 2906 states and 4772 transitions.
[2020-08-21 18:20:11,905 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 496
[2020-08-21 18:20:11,905 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 18:20:11,906 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, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 18:20:11,907 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 18:20:11,907 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 18:20:11,907 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 18:20:11,908 INFO  L82        PathProgramCache]: Analyzing trace with hash -1236769392, now seen corresponding path program 1 times
[2020-08-21 18:20:11,908 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 18:20:11,909 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417793600]
[2020-08-21 18:20:11,909 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 18:20:12,279 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 18:20:13,980 WARN  L193               SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 400
[2020-08-21 18:20:13,983 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 18:20:13,990 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 18:20:14,295 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 18:20:14,296 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417793600]
[2020-08-21 18:20:14,296 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 18:20:14,296 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 18:20:14,297 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886541123]
[2020-08-21 18:20:14,299 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 18:20:14,299 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 18:20:14,299 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 18:20:14,300 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 18:20:14,300 INFO  L87              Difference]: Start difference. First operand 2906 states and 4772 transitions. Second operand 4 states.
[2020-08-21 18:20:35,326 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 18:20:35,327 INFO  L93              Difference]: Finished difference Result 8439 states and 13819 transitions.
[2020-08-21 18:20:35,327 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-21 18:20:35,328 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 495
[2020-08-21 18:20:35,329 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 18:20:35,366 INFO  L225             Difference]: With dead ends: 8439
[2020-08-21 18:20:35,366 INFO  L226             Difference]: Without dead ends: 5747
[2020-08-21 18:20:35,376 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 18:20:35,386 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5747 states.
[2020-08-21 18:20:35,600 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5747 to 5692.
[2020-08-21 18:20:35,601 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5692 states.
[2020-08-21 18:20:35,620 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 9324 transitions.
[2020-08-21 18:20:35,621 INFO  L78                 Accepts]: Start accepts. Automaton has 5692 states and 9324 transitions. Word has length 495
[2020-08-21 18:20:35,623 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 18:20:35,623 INFO  L479      AbstractCegarLoop]: Abstraction has 5692 states and 9324 transitions.
[2020-08-21 18:20:35,623 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-21 18:20:35,623 INFO  L276                IsEmpty]: Start isEmpty. Operand 5692 states and 9324 transitions.
[2020-08-21 18:20:35,647 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 497
[2020-08-21 18:20:35,649 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 18:20:35,653 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, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 18:20:35,653 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 18:20:35,654 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 18:20:35,654 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 18:20:35,655 INFO  L82        PathProgramCache]: Analyzing trace with hash -1780546784, now seen corresponding path program 1 times
[2020-08-21 18:20:35,656 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 18:20:35,656 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496152794]
[2020-08-21 18:20:35,656 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 18:20:35,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 18:20:36,787 WARN  L193               SmtUtils]: Spent 919.00 ms on a formula simplification that was a NOOP. DAG size: 400
[2020-08-21 18:20:36,789 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 18:20:36,796 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 18:20:36,941 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 18:20:36,942 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496152794]
[2020-08-21 18:20:36,942 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 18:20:36,942 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-21 18:20:36,942 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781865818]
[2020-08-21 18:20:36,943 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-21 18:20:36,944 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 18:20:36,944 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-21 18:20:36,944 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-21 18:20:36,944 INFO  L87              Difference]: Start difference. First operand 5692 states and 9324 transitions. Second operand 4 states.