/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --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.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-25 01:13:07,013 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-25 01:13:07,017 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 01:13:07,064 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 01:13:07,065 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 01:13:07,073 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 01:13:07,075 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-09-25 01:13:07,085 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-25 01:13:07,090 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 01:13:07,093 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 01:13:07,095 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 01:13:07,097 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 01:13:07,099 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 01:13:07,100 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 01:13:07,102 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 01:13:07,108 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 01:13:07,113 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 01:13:07,114 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 01:13:07,115 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 01:13:07,116 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 01:13:07,119 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 01:13:07,119 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 01:13:07,119 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 01:13:07,120 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 01:13:07,121 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-25 01:13:07,122 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-25 01:13:07,122 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-25 01:13:07,123 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-25 01:13:07,124 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 01:13:07,125 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 01:13:07,127 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 01:13:07,127 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 01:13:07,128 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 01:13:07,128 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 01:13:07,128 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-25 01:13:07,130 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-25 01:13:07,131 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 01:13:07,132 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
[2020-09-25 01:13:07,158 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-25 01:13:07,159 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 01:13:07,161 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 01:13:07,161 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-25 01:13:07,161 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-25 01:13:07,162 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 01:13:07,162 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-25 01:13:07,162 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-25 01:13:07,162 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-25 01:13:07,163 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-25 01:13:07,163 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 01:13:07,163 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 01:13:07,163 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 01:13:07,164 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-25 01:13:07,164 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-25 01:13:07,164 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-25 01:13:07,165 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-25 01:13:07,165 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 01:13:07,165 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-25 01:13:07,165 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-25 01:13:07,166 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-25 01:13:07,166 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 01:13:07,166 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 01:13:07,166 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 01:13:07,166 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 01:13:07,167 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-25 01:13:07,167 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 01:13:07,168 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 01:13:07,168 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-25 01:13:07,169 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.rcfgbuilder: Size of a code block -> SingleStatement
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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;
[2020-09-25 01:13:07,689 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 01:13:07,717 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 01:13:07,722 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 01:13:07,725 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-25 01:13:07,726 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-25 01:13:07,728 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-09-25 01:13:07,825 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/803cf07d2/330f10253b5546a08479b4d4db6eca49/FLAG31c45d1fb
[2020-09-25 01:13:08,547 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-25 01:13:08,551 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-09-25 01:13:08,569 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/803cf07d2/330f10253b5546a08479b4d4db6eca49/FLAG31c45d1fb
[2020-09-25 01:13:08,729 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/803cf07d2/330f10253b5546a08479b4d4db6eca49
[2020-09-25 01:13:08,744 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 01:13:08,750 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 01:13:08,752 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 01:13:08,752 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 01:13:08,756 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 01:13:08,758 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:13:08" (1/1) ...
[2020-09-25 01:13:08,762 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8831ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:08, skipping insertion in model container
[2020-09-25 01:13:08,763 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:13:08" (1/1) ...
[2020-09-25 01:13:08,772 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-25 01:13:08,852 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-25 01:13:09,597 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 01:13:09,612 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-25 01:13:10,145 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 01:13:10,180 INFO  L208         MainTranslator]: Completed translation
[2020-09-25 01:13:10,182 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10 WrapperNode
[2020-09-25 01:13:10,182 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 01:13:10,183 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 01:13:10,183 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 01:13:10,183 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 01:13:10,203 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ...
[2020-09-25 01:13:10,206 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ...
[2020-09-25 01:13:10,260 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ...
[2020-09-25 01:13:10,261 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ...
[2020-09-25 01:13:10,339 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ...
[2020-09-25 01:13:10,372 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ...
[2020-09-25 01:13:10,383 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (1/1) ...
[2020-09-25 01:13:10,393 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 01:13:10,397 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 01:13:10,397 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 01:13:10,398 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-25 01:13:10,399 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (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
[2020-09-25 01:13:10,511 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 01:13:10,512 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 01:13:10,512 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-25 01:13:10,512 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 01:13:10,512 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 01:13:10,513 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-09-25 01:13:10,513 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar
[2020-09-25 01:13:10,513 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-25 01:13:10,514 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-09-25 01:13:10,514 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-25 01:13:10,515 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-25 01:13:10,515 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-09-25 01:13:10,515 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-09-25 01:13:10,515 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-09-25 01:13:10,515 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-09-25 01:13:10,516 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-09-25 01:13:10,517 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-25 01:13:10,517 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-09-25 01:13:10,517 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-25 01:13:10,517 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 01:13:10,518 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 01:13:12,767 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 01:13:12,767 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-25 01:13:12,787 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:13:12 BoogieIcfgContainer
[2020-09-25 01:13:12,787 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 01:13:12,788 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 01:13:12,788 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 01:13:12,800 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-25 01:13:12,801 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:13:08" (1/3) ...
[2020-09-25 01:13:12,802 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bff4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:13:12, skipping insertion in model container
[2020-09-25 01:13:12,802 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:13:10" (2/3) ...
[2020-09-25 01:13:12,802 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33bff4a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:13:12, skipping insertion in model container
[2020-09-25 01:13:12,802 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:13:12" (3/3) ...
[2020-09-25 01:13:12,806 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.3.1.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c
[2020-09-25 01:13:12,817 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 01:13:12,830 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations.
[2020-09-25 01:13:12,855 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 5 error locations.
[2020-09-25 01:13:12,896 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-25 01:13:12,896 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-25 01:13:12,897 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 01:13:12,897 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 01:13:12,897 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 01:13:12,897 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-25 01:13:12,897 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 01:13:12,898 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 01:13:12,945 INFO  L276                IsEmpty]: Start isEmpty. Operand 1233 states.
[2020-09-25 01:13:12,990 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 457
[2020-09-25 01:13:12,994 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 01:13:12,996 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]
[2020-09-25 01:13:12,997 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 01:13:13,005 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 01:13:13,006 INFO  L82        PathProgramCache]: Analyzing trace with hash -1303335379, now seen corresponding path program 1 times
[2020-09-25 01:13:13,019 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 01:13:13,019 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668146707]
[2020-09-25 01:13:13,020 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 01:13:13,553 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 01:13:13,885 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:14,218 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:14,505 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:14,798 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:14,965 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:15,113 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:15,503 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:18,014 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:18,613 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 01:13:18,613 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 463
[2020-09-25 01:13:18,613 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-25 01:13:18,614 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5049
[2020-09-25 01:13:18,617 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-09-25 01:13:18,618 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 01:13:18,618 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 207
[2020-09-25 01:13:18,619 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 207
[2020-09-25 01:13:18,619 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 5
[2020-09-25 01:13:19,392 WARN  L193               SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 196
[2020-09-25 01:13:19,395 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 01:13:19,404 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 01:13:19,416 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:19,473 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 01:13:19,473 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 74
[2020-09-25 01:13:19,474 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 01:13:19,474 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 67
[2020-09-25 01:13:19,475 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-09-25 01:13:19,475 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 01:13:19,475 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 01:13:19,476 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 01:13:19,476 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 01:13:19,934 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 01:13:19,935 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668146707]
[2020-09-25 01:13:19,937 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 01:13:19,938 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-25 01:13:19,939 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689148349]
[2020-09-25 01:13:19,947 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-25 01:13:19,947 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 01:13:19,967 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-25 01:13:19,968 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 01:13:19,972 INFO  L87              Difference]: Start difference. First operand 1233 states. Second operand 4 states.
[2020-09-25 01:13:24,869 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 01:13:24,869 INFO  L93              Difference]: Finished difference Result 2019 states and 2601 transitions.
[2020-09-25 01:13:24,871 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-25 01:13:24,873 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 456
[2020-09-25 01:13:24,876 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 01:13:24,908 INFO  L225             Difference]: With dead ends: 2019
[2020-09-25 01:13:24,908 INFO  L226             Difference]: Without dead ends: 1445
[2020-09-25 01:13:24,916 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 01:13:24,941 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1445 states.
[2020-09-25 01:13:25,048 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1438.
[2020-09-25 01:13:25,050 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1438 states.
[2020-09-25 01:13:25,057 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1438 states to 1438 states and 1723 transitions.
[2020-09-25 01:13:25,059 INFO  L78                 Accepts]: Start accepts. Automaton has 1438 states and 1723 transitions. Word has length 456
[2020-09-25 01:13:25,061 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 01:13:25,061 INFO  L479      AbstractCegarLoop]: Abstraction has 1438 states and 1723 transitions.
[2020-09-25 01:13:25,061 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-25 01:13:25,061 INFO  L276                IsEmpty]: Start isEmpty. Operand 1438 states and 1723 transitions.
[2020-09-25 01:13:25,071 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 457
[2020-09-25 01:13:25,072 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 01:13:25,072 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]
[2020-09-25 01:13:25,073 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 01:13:25,073 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 01:13:25,074 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 01:13:25,074 INFO  L82        PathProgramCache]: Analyzing trace with hash 1418962381, now seen corresponding path program 1 times
[2020-09-25 01:13:25,074 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 01:13:25,074 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676370511]
[2020-09-25 01:13:25,075 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 01:13:25,173 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 01:13:25,283 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:25,465 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:25,638 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:25,803 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:25,961 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:26,152 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:26,479 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:28,676 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:29,621 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:30,228 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 01:13:30,229 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 463
[2020-09-25 01:13:30,229 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 9
[2020-09-25 01:13:30,229 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5052
[2020-09-25 01:13:30,230 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-09-25 01:13:30,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 01:13:30,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 208
[2020-09-25 01:13:30,230 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 218
[2020-09-25 01:13:30,230 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 01:13:30,716 WARN  L193               SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 196
[2020-09-25 01:13:30,718 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 01:13:30,724 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 01:13:30,735 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:30,782 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 01:13:30,783 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 74
[2020-09-25 01:13:30,783 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 01:13:30,784 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 57
[2020-09-25 01:13:30,784 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-09-25 01:13:30,784 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 01:13:30,785 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 01:13:30,785 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 01:13:30,786 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 01:13:31,289 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 01:13:31,290 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676370511]
[2020-09-25 01:13:31,290 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 01:13:31,291 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-25 01:13:31,291 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227776724]
[2020-09-25 01:13:31,296 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-25 01:13:31,296 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 01:13:31,297 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-25 01:13:31,297 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 01:13:31,297 INFO  L87              Difference]: Start difference. First operand 1438 states and 1723 transitions. Second operand 4 states.
[2020-09-25 01:13:35,417 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 01:13:35,417 INFO  L93              Difference]: Finished difference Result 2635 states and 3268 transitions.
[2020-09-25 01:13:35,418 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-25 01:13:35,418 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 456
[2020-09-25 01:13:35,419 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 01:13:35,430 INFO  L225             Difference]: With dead ends: 2635
[2020-09-25 01:13:35,430 INFO  L226             Difference]: Without dead ends: 2144
[2020-09-25 01:13:35,433 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 01:13:35,438 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2144 states.
[2020-09-25 01:13:35,486 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 2132.
[2020-09-25 01:13:35,487 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 2132 states.
[2020-09-25 01:13:35,496 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 2132 states to 2132 states and 2619 transitions.
[2020-09-25 01:13:35,496 INFO  L78                 Accepts]: Start accepts. Automaton has 2132 states and 2619 transitions. Word has length 456
[2020-09-25 01:13:35,497 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 01:13:35,497 INFO  L479      AbstractCegarLoop]: Abstraction has 2132 states and 2619 transitions.
[2020-09-25 01:13:35,498 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-25 01:13:35,498 INFO  L276                IsEmpty]: Start isEmpty. Operand 2132 states and 2619 transitions.
[2020-09-25 01:13:35,508 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 457
[2020-09-25 01:13:35,509 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 01:13:35,509 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]
[2020-09-25 01:13:35,509 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 01:13:35,510 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 01:13:35,510 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 01:13:35,510 INFO  L82        PathProgramCache]: Analyzing trace with hash 496290573, now seen corresponding path program 1 times
[2020-09-25 01:13:35,511 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 01:13:35,511 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411437788]
[2020-09-25 01:13:35,511 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 01:13:35,610 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 01:13:35,736 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:35,907 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:36,053 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:36,183 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:36,310 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:36,420 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:36,723 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:39,022 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:40,658 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 01:13:40,658 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 463
[2020-09-25 01:13:40,658 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-25 01:13:40,659 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5045
[2020-09-25 01:13:40,659 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-09-25 01:13:40,659 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 01:13:40,659 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 179
[2020-09-25 01:13:40,660 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 80
[2020-09-25 01:13:40,660 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 01:13:41,273 WARN  L193               SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 196
[2020-09-25 01:13:41,275 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 01:13:41,282 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 01:13:41,293 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:41,333 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 01:13:41,333 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 74
[2020-09-25 01:13:41,334 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 01:13:41,334 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 49
[2020-09-25 01:13:41,334 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-09-25 01:13:41,334 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 01:13:41,335 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 01:13:41,335 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 01:13:41,335 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 01:13:41,577 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 01:13:41,578 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411437788]
[2020-09-25 01:13:41,578 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 01:13:41,578 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-25 01:13:41,579 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790398832]
[2020-09-25 01:13:41,579 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-25 01:13:41,580 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 01:13:41,580 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-25 01:13:41,580 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-25 01:13:41,581 INFO  L87              Difference]: Start difference. First operand 2132 states and 2619 transitions. Second operand 5 states.
[2020-09-25 01:13:48,893 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 01:13:48,893 INFO  L93              Difference]: Finished difference Result 5777 states and 7153 transitions.
[2020-09-25 01:13:48,894 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-25 01:13:48,894 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 456
[2020-09-25 01:13:48,895 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 01:13:48,915 INFO  L225             Difference]: With dead ends: 5777
[2020-09-25 01:13:48,915 INFO  L226             Difference]: Without dead ends: 3969
[2020-09-25 01:13:48,921 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-09-25 01:13:48,927 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3969 states.
[2020-09-25 01:13:49,057 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 3838.
[2020-09-25 01:13:49,057 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3838 states.
[2020-09-25 01:13:49,070 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 4748 transitions.
[2020-09-25 01:13:49,070 INFO  L78                 Accepts]: Start accepts. Automaton has 3838 states and 4748 transitions. Word has length 456
[2020-09-25 01:13:49,071 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 01:13:49,071 INFO  L479      AbstractCegarLoop]: Abstraction has 3838 states and 4748 transitions.
[2020-09-25 01:13:49,071 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-25 01:13:49,072 INFO  L276                IsEmpty]: Start isEmpty. Operand 3838 states and 4748 transitions.
[2020-09-25 01:13:49,085 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 458
[2020-09-25 01:13:49,085 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 01:13:49,086 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]
[2020-09-25 01:13:49,086 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 01:13:49,088 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr4ASSERT_VIOLATIONERROR_FUNCTION, mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr3ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 01:13:49,092 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 01:13:49,092 INFO  L82        PathProgramCache]: Analyzing trace with hash 1246597683, now seen corresponding path program 1 times
[2020-09-25 01:13:49,093 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 01:13:49,094 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072307677]
[2020-09-25 01:13:49,094 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 01:13:49,166 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 01:13:49,240 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:49,421 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:49,604 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:49,762 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:49,894 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:50,019 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:50,335 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:52,486 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:53,407 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:54,214 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 01:13:54,224 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 464
[2020-09-25 01:13:54,225 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 9
[2020-09-25 01:13:54,225 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5044
[2020-09-25 01:13:54,225 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-09-25 01:13:54,225 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 01:13:54,226 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 192
[2020-09-25 01:13:54,229 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 5
[2020-09-25 01:13:54,229 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 01:13:54,594 WARN  L193               SmtUtils]: Spent 263.00 ms on a formula simplification that was a NOOP. DAG size: 196
[2020-09-25 01:13:54,596 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 01:13:54,602 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 01:13:54,611 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 01:13:54,647 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 01:13:54,647 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 74
[2020-09-25 01:13:54,648 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 01:13:54,648 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 44
[2020-09-25 01:13:54,648 FATAL L256   erpolLogProxyWrapper]: Heuristic: DEEPEST
[2020-09-25 01:13:54,648 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 01:13:54,648 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 01:13:54,649 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 01:13:54,649 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-25 01:13:54,777 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-25 01:13:54,777 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072307677]
[2020-09-25 01:13:54,778 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 01:13:54,778 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-25 01:13:54,778 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980430685]
[2020-09-25 01:13:54,779 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-25 01:13:54,779 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 01:13:54,779 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-25 01:13:54,780 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 01:13:54,780 INFO  L87              Difference]: Start difference. First operand 3838 states and 4748 transitions. Second operand 4 states.