/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --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_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-25 08:04:09,797 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-25 08:04:09,800 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-25 08:04:09,828 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-25 08:04:09,828 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-25 08:04:09,830 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-25 08:04:09,832 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-25 08:04:09,834 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2020-09-25 08:04:09,837 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-25 08:04:09,840 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-25 08:04:09,842 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-25 08:04:09,843 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-25 08:04:09,844 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-25 08:04:09,845 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-25 08:04:09,847 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-25 08:04:09,849 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-25 08:04:09,851 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-25 08:04:09,853 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-25 08:04:09,854 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-25 08:04:09,855 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-25 08:04:09,857 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-25 08:04:09,860 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-25 08:04:09,860 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-25 08:04:09,860 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-25 08:04:09,861 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-25 08:04:09,862 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-09-25 08:04:09,864 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-09-25 08:04:09,866 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-25 08:04:09,869 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-25 08:04:09,870 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-25 08:04:09,870 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-25 08:04:09,873 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-25 08:04:09,873 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-25 08:04:09,873 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-25 08:04:09,875 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-25 08:04:09,876 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 08:04:09,931 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-25 08:04:09,931 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-25 08:04:09,933 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-25 08:04:09,933 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-25 08:04:09,933 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-25 08:04:09,933 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-25 08:04:09,933 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-25 08:04:09,934 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-25 08:04:09,934 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-25 08:04:09,934 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-25 08:04:09,935 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-25 08:04:09,935 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-25 08:04:09,935 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-25 08:04:09,936 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-25 08:04:09,936 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-25 08:04:09,937 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-25 08:04:09,937 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-25 08:04:09,937 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-25 08:04:09,937 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-25 08:04:09,937 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-25 08:04:09,938 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-25 08:04:09,938 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-25 08:04:09,938 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-25 08:04:09,938 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-25 08:04:09,939 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-25 08:04:09,939 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-25 08:04:09,939 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-25 08:04:09,939 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-25 08:04:09,939 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-25 08:04:09,940 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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;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=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true;
[2020-09-25 08:04:10,410 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-25 08:04:10,428 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-25 08:04:10,433 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-25 08:04:10,435 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-25 08:04:10,436 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-25 08:04:10,437 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c
[2020-09-25 08:04:10,514 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ce241f50/2512354c57b24a9b87c33e1b96ea5379/FLAG2c125f9dd
[2020-09-25 08:04:11,231 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-25 08:04:11,232 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c
[2020-09-25 08:04:11,244 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ce241f50/2512354c57b24a9b87c33e1b96ea5379/FLAG2c125f9dd
[2020-09-25 08:04:11,447 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ce241f50/2512354c57b24a9b87c33e1b96ea5379
[2020-09-25 08:04:11,459 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-25 08:04:11,466 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-25 08:04:11,467 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-25 08:04:11,467 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-25 08:04:11,471 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-25 08:04:11,472 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:11" (1/1) ...
[2020-09-25 08:04:11,476 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@121db1c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:11, skipping insertion in model container
[2020-09-25 08:04:11,477 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 08:04:11" (1/1) ...
[2020-09-25 08:04:11,486 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-25 08:04:11,554 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-25 08:04:12,110 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 08:04:12,125 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-25 08:04:12,291 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-25 08:04:12,315 INFO  L208         MainTranslator]: Completed translation
[2020-09-25 08:04:12,316 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12 WrapperNode
[2020-09-25 08:04:12,316 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-25 08:04:12,317 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-25 08:04:12,317 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-25 08:04:12,317 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-25 08:04:12,334 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12" (1/1) ...
[2020-09-25 08:04:12,334 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12" (1/1) ...
[2020-09-25 08:04:12,353 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12" (1/1) ...
[2020-09-25 08:04:12,353 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12" (1/1) ...
[2020-09-25 08:04:12,380 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12" (1/1) ...
[2020-09-25 08:04:12,401 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12" (1/1) ...
[2020-09-25 08:04:12,406 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12" (1/1) ...
[2020-09-25 08:04:12,414 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-25 08:04:12,415 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-25 08:04:12,415 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-25 08:04:12,416 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-25 08:04:12,417 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12" (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 08:04:12,519 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-25 08:04:12,520 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-25 08:04:12,520 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-09-25 08:04:12,520 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-25 08:04:12,520 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-25 08:04:12,521 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char
[2020-09-25 08:04:12,521 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-09-25 08:04:12,522 INFO  L130     BoogieDeclarations]: Found specification of procedure assert
[2020-09-25 08:04:12,523 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-09-25 08:04:12,523 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-09-25 08:04:12,523 INFO  L130     BoogieDeclarations]: Found specification of procedure read
[2020-09-25 08:04:12,523 INFO  L130     BoogieDeclarations]: Found specification of procedure write
[2020-09-25 08:04:12,524 INFO  L130     BoogieDeclarations]: Found specification of procedure node1
[2020-09-25 08:04:12,524 INFO  L130     BoogieDeclarations]: Found specification of procedure node2
[2020-09-25 08:04:12,524 INFO  L130     BoogieDeclarations]: Found specification of procedure node3
[2020-09-25 08:04:12,525 INFO  L130     BoogieDeclarations]: Found specification of procedure init
[2020-09-25 08:04:12,525 INFO  L130     BoogieDeclarations]: Found specification of procedure check
[2020-09-25 08:04:12,526 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-25 08:04:12,526 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-25 08:04:12,526 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-25 08:04:14,068 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-25 08:04:14,069 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-25 08:04:14,080 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:14 BoogieIcfgContainer
[2020-09-25 08:04:14,081 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-25 08:04:14,082 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-25 08:04:14,082 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-25 08:04:14,086 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-25 08:04:14,086 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 08:04:11" (1/3) ...
[2020-09-25 08:04:14,087 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f993511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:14, skipping insertion in model container
[2020-09-25 08:04:14,087 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 08:04:12" (2/3) ...
[2020-09-25 08:04:14,088 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f993511 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 08:04:14, skipping insertion in model container
[2020-09-25 08:04:14,088 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 08:04:14" (3/3) ...
[2020-09-25 08:04:14,090 INFO  L109   eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c
[2020-09-25 08:04:14,103 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-25 08:04:14,116 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-25 08:04:14,140 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-25 08:04:14,178 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-25 08:04:14,178 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-25 08:04:14,178 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-25 08:04:14,178 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-25 08:04:14,179 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-25 08:04:14,179 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-25 08:04:14,179 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-25 08:04:14,179 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-25 08:04:14,218 INFO  L276                IsEmpty]: Start isEmpty. Operand 822 states.
[2020-09-25 08:04:14,248 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 419
[2020-09-25 08:04:14,248 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 08:04:14,250 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]
[2020-09-25 08:04:14,250 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:04:14,259 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:04:14,260 INFO  L82        PathProgramCache]: Analyzing trace with hash -1493724513, now seen corresponding path program 1 times
[2020-09-25 08:04:14,273 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:04:14,273 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925046846]
[2020-09-25 08:04:14,275 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:04:14,907 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:04:15,119 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:15,472 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:15,730 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:15,930 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:16,097 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:16,267 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:16,656 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:16,903 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:19,935 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:04:19,936 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 425
[2020-09-25 08:04:19,936 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-25 08:04:19,936 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5014
[2020-09-25 08:04:19,940 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:04:19,940 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:04:19,941 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 08:04:19,941 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 196
[2020-09-25 08:04:19,941 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 186
[2020-09-25 08:04:19,941 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-25 08:04:20,662 WARN  L193               SmtUtils]: Spent 392.00 ms on a formula simplification that was a NOOP. DAG size: 172
[2020-09-25 08:04:20,667 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:04:20,682 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:04:20,693 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:20,744 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:04:20,744 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 66
[2020-09-25 08:04:20,745 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:04:20,745 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 60
[2020-09-25 08:04:20,745 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:04:20,746 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:04:20,746 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:04:20,747 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:04:20,747 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:04:20,748 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-25 08:04:21,051 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 08:04:21,052 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925046846]
[2020-09-25 08:04:21,054 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 08:04:21,055 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-25 08:04:21,056 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631579687]
[2020-09-25 08:04:21,066 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-25 08:04:21,067 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:04:21,089 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-25 08:04:21,090 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 08:04:21,094 INFO  L87              Difference]: Start difference. First operand 822 states. Second operand 4 states.
[2020-09-25 08:04:24,302 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:04:24,303 INFO  L93              Difference]: Finished difference Result 1488 states and 1948 transitions.
[2020-09-25 08:04:24,304 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-25 08:04:24,306 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 418
[2020-09-25 08:04:24,308 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:04:24,337 INFO  L225             Difference]: With dead ends: 1488
[2020-09-25 08:04:24,338 INFO  L226             Difference]: Without dead ends: 1109
[2020-09-25 08:04:24,348 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 08:04:24,376 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1109 states.
[2020-09-25 08:04:24,476 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1102.
[2020-09-25 08:04:24,480 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1102 states.
[2020-09-25 08:04:24,486 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1345 transitions.
[2020-09-25 08:04:24,488 INFO  L78                 Accepts]: Start accepts. Automaton has 1102 states and 1345 transitions. Word has length 418
[2020-09-25 08:04:24,490 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:04:24,491 INFO  L479      AbstractCegarLoop]: Abstraction has 1102 states and 1345 transitions.
[2020-09-25 08:04:24,491 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-25 08:04:24,491 INFO  L276                IsEmpty]: Start isEmpty. Operand 1102 states and 1345 transitions.
[2020-09-25 08:04:24,499 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 419
[2020-09-25 08:04:24,500 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 08:04:24,500 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]
[2020-09-25 08:04:24,501 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-25 08:04:24,501 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:04:24,501 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:04:24,502 INFO  L82        PathProgramCache]: Analyzing trace with hash 1571498271, now seen corresponding path program 1 times
[2020-09-25 08:04:24,502 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:04:24,502 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416401148]
[2020-09-25 08:04:24,503 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:04:24,634 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:04:24,740 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:24,914 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:25,069 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:25,224 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:25,371 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:25,507 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:25,836 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:26,090 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:29,756 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:04:29,757 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 425
[2020-09-25 08:04:29,758 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-25 08:04:29,758 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5119
[2020-09-25 08:04:29,759 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:04:29,759 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:04:29,759 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 08:04:29,760 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 197
[2020-09-25 08:04:29,760 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 193
[2020-09-25 08:04:29,760 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-25 08:04:30,143 WARN  L193               SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 172
[2020-09-25 08:04:30,145 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:04:30,152 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:04:30,161 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:30,200 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:04:30,201 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 66
[2020-09-25 08:04:30,201 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:04:30,201 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 47
[2020-09-25 08:04:30,202 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:04:30,202 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:04:30,202 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:04:30,203 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:04:30,203 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:04:30,203 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:04:30,537 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 08:04:30,537 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416401148]
[2020-09-25 08:04:30,538 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 08:04:30,538 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-25 08:04:30,538 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746345593]
[2020-09-25 08:04:30,542 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-25 08:04:30,543 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:04:30,543 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-25 08:04:30,543 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 08:04:30,544 INFO  L87              Difference]: Start difference. First operand 1102 states and 1345 transitions. Second operand 4 states.
[2020-09-25 08:04:33,018 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:04:33,018 INFO  L93              Difference]: Finished difference Result 2222 states and 2792 transitions.
[2020-09-25 08:04:33,022 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-25 08:04:33,022 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 418
[2020-09-25 08:04:33,026 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:04:33,041 INFO  L225             Difference]: With dead ends: 2222
[2020-09-25 08:04:33,041 INFO  L226             Difference]: Without dead ends: 1828
[2020-09-25 08:04:33,050 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 08:04:33,053 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1828 states.
[2020-09-25 08:04:33,127 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1828 to 1816.
[2020-09-25 08:04:33,127 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1816 states.
[2020-09-25 08:04:33,137 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2253 transitions.
[2020-09-25 08:04:33,138 INFO  L78                 Accepts]: Start accepts. Automaton has 1816 states and 2253 transitions. Word has length 418
[2020-09-25 08:04:33,139 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:04:33,140 INFO  L479      AbstractCegarLoop]: Abstraction has 1816 states and 2253 transitions.
[2020-09-25 08:04:33,140 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-25 08:04:33,140 INFO  L276                IsEmpty]: Start isEmpty. Operand 1816 states and 2253 transitions.
[2020-09-25 08:04:33,157 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 419
[2020-09-25 08:04:33,157 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 08:04:33,158 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]
[2020-09-25 08:04:33,158 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-25 08:04:33,159 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:04:33,159 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:04:33,160 INFO  L82        PathProgramCache]: Analyzing trace with hash 924566943, now seen corresponding path program 1 times
[2020-09-25 08:04:33,160 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:04:33,160 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868148549]
[2020-09-25 08:04:33,161 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:04:33,294 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:04:33,543 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:33,724 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:33,865 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:34,005 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:34,126 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:34,244 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:34,507 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:34,725 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:38,316 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:04:38,317 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 425
[2020-09-25 08:04:38,317 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-25 08:04:38,317 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5018
[2020-09-25 08:04:38,318 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:04:38,318 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:04:38,318 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-25 08:04:38,319 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 198
[2020-09-25 08:04:38,319 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 200
[2020-09-25 08:04:38,319 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:04:38,676 WARN  L193               SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 172
[2020-09-25 08:04:38,677 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:04:38,682 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:04:38,691 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:38,728 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:04:38,728 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 66
[2020-09-25 08:04:38,729 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:04:38,729 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 44
[2020-09-25 08:04:38,729 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:04:38,730 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:04:38,730 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:04:38,730 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:04:38,731 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:04:38,731 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:04:39,104 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 08:04:39,104 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868148549]
[2020-09-25 08:04:39,105 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 08:04:39,106 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-09-25 08:04:39,106 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401205959]
[2020-09-25 08:04:39,108 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-09-25 08:04:39,108 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:04:39,109 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-09-25 08:04:39,110 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 08:04:39,110 INFO  L87              Difference]: Start difference. First operand 1816 states and 2253 transitions. Second operand 4 states.
[2020-09-25 08:04:41,785 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:04:41,785 INFO  L93              Difference]: Finished difference Result 3904 states and 4955 transitions.
[2020-09-25 08:04:41,785 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-09-25 08:04:41,786 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 418
[2020-09-25 08:04:41,787 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:04:41,802 INFO  L225             Difference]: With dead ends: 3904
[2020-09-25 08:04:41,802 INFO  L226             Difference]: Without dead ends: 3194
[2020-09-25 08:04:41,805 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-09-25 08:04:41,811 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 3194 states.
[2020-09-25 08:04:41,890 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 3194 to 3172.
[2020-09-25 08:04:41,890 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 3172 states.
[2020-09-25 08:04:41,900 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 3172 states to 3172 states and 3977 transitions.
[2020-09-25 08:04:41,900 INFO  L78                 Accepts]: Start accepts. Automaton has 3172 states and 3977 transitions. Word has length 418
[2020-09-25 08:04:41,901 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:04:41,901 INFO  L479      AbstractCegarLoop]: Abstraction has 3172 states and 3977 transitions.
[2020-09-25 08:04:41,901 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-09-25 08:04:41,901 INFO  L276                IsEmpty]: Start isEmpty. Operand 3172 states and 3977 transitions.
[2020-09-25 08:04:41,913 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 419
[2020-09-25 08:04:41,918 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 08:04:41,918 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]
[2020-09-25 08:04:41,918 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-25 08:04:41,919 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:04:41,919 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:04:41,919 INFO  L82        PathProgramCache]: Analyzing trace with hash 1033201695, now seen corresponding path program 1 times
[2020-09-25 08:04:41,920 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:04:41,921 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882226368]
[2020-09-25 08:04:41,921 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:04:42,014 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:04:42,129 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:42,290 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:42,415 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:42,537 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:42,706 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:42,815 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:43,589 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:45,973 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:46,224 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:46,696 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:47,028 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:04:47,028 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 425
[2020-09-25 08:04:47,028 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 10
[2020-09-25 08:04:47,028 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5009
[2020-09-25 08:04:47,029 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:04:47,029 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:04:47,029 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-25 08:04:47,029 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 166
[2020-09-25 08:04:47,029 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 125
[2020-09-25 08:04:47,030 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:04:47,555 WARN  L193               SmtUtils]: Spent 261.00 ms on a formula simplification that was a NOOP. DAG size: 172
[2020-09-25 08:04:47,556 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-25 08:04:47,562 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:04:47,570 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:47,605 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-09-25 08:04:47,605 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 66
[2020-09-25 08:04:47,605 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-25 08:04:47,605 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 42
[2020-09-25 08:04:47,606 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-09-25 08:04:47,606 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.8
[2020-09-25 08:04:47,606 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-25 08:04:47,606 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-25 08:04:47,607 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-25 08:04:47,607 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-25 08:04:47,813 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 08:04:47,813 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882226368]
[2020-09-25 08:04:47,813 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-25 08:04:47,814 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-25 08:04:47,814 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631635874]
[2020-09-25 08:04:47,815 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-25 08:04:47,815 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-25 08:04:47,815 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-25 08:04:47,815 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-25 08:04:47,815 INFO  L87              Difference]: Start difference. First operand 3172 states and 3977 transitions. Second operand 5 states.
[2020-09-25 08:04:52,781 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-25 08:04:52,782 INFO  L93              Difference]: Finished difference Result 8867 states and 11187 transitions.
[2020-09-25 08:04:52,788 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-09-25 08:04:52,788 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 418
[2020-09-25 08:04:52,789 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-25 08:04:52,817 INFO  L225             Difference]: With dead ends: 8867
[2020-09-25 08:04:52,817 INFO  L226             Difference]: Without dead ends: 5977
[2020-09-25 08:04:52,825 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 08:04:52,832 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5977 states.
[2020-09-25 08:04:53,037 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5977 to 5975.
[2020-09-25 08:04:53,038 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5975 states.
[2020-09-25 08:04:53,063 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5975 states to 5975 states and 7480 transitions.
[2020-09-25 08:04:53,064 INFO  L78                 Accepts]: Start accepts. Automaton has 5975 states and 7480 transitions. Word has length 418
[2020-09-25 08:04:53,065 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-25 08:04:53,065 INFO  L479      AbstractCegarLoop]: Abstraction has 5975 states and 7480 transitions.
[2020-09-25 08:04:53,065 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-25 08:04:53,066 INFO  L276                IsEmpty]: Start isEmpty. Operand 5975 states and 7480 transitions.
[2020-09-25 08:04:53,091 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 420
[2020-09-25 08:04:53,091 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-25 08:04:53,092 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]
[2020-09-25 08:04:53,092 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-09-25 08:04:53,092 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-25 08:04:53,093 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-25 08:04:53,093 INFO  L82        PathProgramCache]: Analyzing trace with hash -725792445, now seen corresponding path program 1 times
[2020-09-25 08:04:53,093 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-25 08:04:53,094 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115841086]
[2020-09-25 08:04:53,094 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-25 08:04:53,161 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-25 08:04:53,231 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:53,362 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:53,515 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:53,643 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:53,757 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:53,856 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:54,609 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-25 08:04:56,900 FATAL L256   erpolLogProxyWrapper]: Now shrinking...