/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem02_label31.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:13:05,856 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:13:05,861 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:13:05,906 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:13:05,908 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:13:05,919 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:13:05,920 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:13:05,925 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:13:05,927 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:13:05,931 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 17:13:05,935 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:13:05,935 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:13:05,938 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:13:05,941 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:13:05,943 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:13:05,944 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:13:05,946 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:13:05,948 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:13:05,954 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:13:05,958 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:13:05,959 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:13:05,960 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:13:05,961 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:13:05,966 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:13:05,967 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:13:05,967 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:13:05,970 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:13:05,971 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:13:05,973 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:13:05,974 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:13:05,975 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:13:05,976 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:13:05,976 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:13:05,978 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:13:05,978 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:13:05,979 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 17:13:05,979 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 17:13:05,980 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 17:13:05,981 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 17:13:05,983 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:13:05,984 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
[2020-09-24 17:13:06,036 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:13:06,037 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:13:06,039 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:13:06,040 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:13:06,040 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:13:06,040 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:13:06,041 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:13:06,041 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:13:06,041 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:13:06,041 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:13:06,042 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:13:06,043 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:13:06,043 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:13:06,043 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:13:06,044 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:13:06,044 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:13:06,044 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:13:06,044 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:13:06,045 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:13:06,045 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:13:06,045 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:13:06,045 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:13:06,045 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:13:06,046 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:13:06,046 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:13:06,046 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:13:06,046 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:13:06,046 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:13:06,047 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:13:06,047 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;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;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;log-additional-information=true;
[2020-09-24 17:13:06,481 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:13:06,508 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:13:06,514 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:13:06,516 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:13:06,516 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:13:06,518 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label31.c
[2020-09-24 17:13:06,611 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca1a999d6/f22fa27f9095428da4336096537654f5/FLAG9ce1b08ba
[2020-09-24 17:13:07,272 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:13:07,274 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label31.c
[2020-09-24 17:13:07,291 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca1a999d6/f22fa27f9095428da4336096537654f5/FLAG9ce1b08ba
[2020-09-24 17:13:07,539 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ca1a999d6/f22fa27f9095428da4336096537654f5
[2020-09-24 17:13:07,558 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:13:07,564 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:13:07,568 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:13:07,568 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:13:07,573 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:13:07,574 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:13:07" (1/1) ...
[2020-09-24 17:13:07,579 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ab12f38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:07, skipping insertion in model container
[2020-09-24 17:13:07,580 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:13:07" (1/1) ...
[2020-09-24 17:13:07,590 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:13:07,663 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:13:08,122 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:13:08,138 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:13:08,424 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:13:08,452 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:13:08,454 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08 WrapperNode
[2020-09-24 17:13:08,455 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:13:08,456 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:13:08,456 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:13:08,456 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:13:08,479 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ...
[2020-09-24 17:13:08,482 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ...
[2020-09-24 17:13:08,526 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ...
[2020-09-24 17:13:08,527 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ...
[2020-09-24 17:13:08,570 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ...
[2020-09-24 17:13:08,585 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ...
[2020-09-24 17:13:08,590 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (1/1) ...
[2020-09-24 17:13:08,603 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:13:08,603 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:13:08,603 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:13:08,604 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:13:08,608 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (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
[2020-09-24 17:13:08,696 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:13:08,697 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:13:08,697 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-09-24 17:13:08,698 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:13:08,698 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-09-24 17:13:08,698 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:13:08,698 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:13:08,698 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 17:13:08,698 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:13:08,699 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:13:08,699 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:13:10,107 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:13:10,107 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 17:13:10,117 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:13:10 BoogieIcfgContainer
[2020-09-24 17:13:10,117 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:13:10,118 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:13:10,119 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:13:10,123 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:13:10,123 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:13:07" (1/3) ...
[2020-09-24 17:13:10,124 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fd38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:13:10, skipping insertion in model container
[2020-09-24 17:13:10,125 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:13:08" (2/3) ...
[2020-09-24 17:13:10,125 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59fd38f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:13:10, skipping insertion in model container
[2020-09-24 17:13:10,125 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:13:10" (3/3) ...
[2020-09-24 17:13:10,128 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem02_label31.c
[2020-09-24 17:13:10,140 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:13:10,152 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:13:10,175 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:13:10,211 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:13:10,212 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:13:10,212 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:13:10,212 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:13:10,212 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:13:10,212 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:13:10,213 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:13:10,213 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:13:10,247 INFO  L276                IsEmpty]: Start isEmpty. Operand 527 states.
[2020-09-24 17:13:10,270 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 143
[2020-09-24 17:13:10,270 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:13:10,272 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]
[2020-09-24 17:13:10,272 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:13:10,281 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:13:10,281 INFO  L82        PathProgramCache]: Analyzing trace with hash -1921303583, now seen corresponding path program 1 times
[2020-09-24 17:13:10,293 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:13:10,294 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299682537]
[2020-09-24 17:13:10,294 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:13:10,605 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:13:10,749 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:11,105 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:11,763 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:12,331 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:12,494 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:12,710 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:12,825 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:12,875 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:14,027 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:14,289 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:16,830 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:21,387 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:13:21,387 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 151
[2020-09-24 17:13:21,387 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 11
[2020-09-24 17:13:21,387 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10772
[2020-09-24 17:13:21,389 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:13:21,389 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 18
[2020-09-24 17:13:21,389 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 17
[2020-09-24 17:13:21,389 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 106
[2020-09-24 17:13:21,390 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:13:21,985 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:13:21,993 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:13:22,000 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:22,054 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:13:22,054 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-24 17:13:22,055 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:13:22,055 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 59
[2020-09-24 17:13:22,055 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:13:22,055 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:13:22,056 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:13:22,056 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 17:13:22,056 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:13:22,291 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:13:22,292 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299682537]
[2020-09-24 17:13:22,294 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:13:22,294 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2020-09-24 17:13:22,295 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822486661]
[2020-09-24 17:13:22,302 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-09-24 17:13:22,302 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:13:22,319 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-09-24 17:13:22,320 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240
[2020-09-24 17:13:22,323 INFO  L87              Difference]: Start difference. First operand 527 states. Second operand 16 states.
[2020-09-24 17:13:23,067 WARN  L193               SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 17:13:23,317 WARN  L193               SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 17:13:23,891 WARN  L193               SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 17:13:24,349 WARN  L193               SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 17:13:25,526 WARN  L193               SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 17:13:25,753 WARN  L193               SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 17:13:26,338 WARN  L193               SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80
[2020-09-24 17:13:26,990 WARN  L193               SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 17:13:27,518 WARN  L193               SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 17:13:29,071 WARN  L193               SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62
[2020-09-24 17:13:30,424 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:13:30,425 INFO  L93              Difference]: Finished difference Result 1650 states and 2328 transitions.
[2020-09-24 17:13:30,427 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-09-24 17:13:30,430 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 142
[2020-09-24 17:13:30,431 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:13:30,469 INFO  L225             Difference]: With dead ends: 1650
[2020-09-24 17:13:30,470 INFO  L226             Difference]: Without dead ends: 1000
[2020-09-24 17:13:30,480 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=433, Invalid=1049, Unknown=0, NotChecked=0, Total=1482
[2020-09-24 17:13:30,504 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1000 states.
[2020-09-24 17:13:30,596 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 897.
[2020-09-24 17:13:30,598 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 897 states.
[2020-09-24 17:13:30,604 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1070 transitions.
[2020-09-24 17:13:30,606 INFO  L78                 Accepts]: Start accepts. Automaton has 897 states and 1070 transitions. Word has length 142
[2020-09-24 17:13:30,607 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:13:30,607 INFO  L479      AbstractCegarLoop]: Abstraction has 897 states and 1070 transitions.
[2020-09-24 17:13:30,607 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-09-24 17:13:30,607 INFO  L276                IsEmpty]: Start isEmpty. Operand 897 states and 1070 transitions.
[2020-09-24 17:13:30,618 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 165
[2020-09-24 17:13:30,619 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:13:30,619 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:13:30,620 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:13:30,620 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:13:30,620 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:13:30,620 INFO  L82        PathProgramCache]: Analyzing trace with hash 444741187, now seen corresponding path program 1 times
[2020-09-24 17:13:30,621 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:13:30,621 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127889091]
[2020-09-24 17:13:30,621 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:13:30,666 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:13:30,704 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:30,812 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:31,132 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:31,351 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:33,135 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:33,456 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:33,985 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:34,299 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:34,377 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:34,506 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:37,740 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:37,856 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:39,947 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:13:39,947 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 175
[2020-09-24 17:13:39,947 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 12
[2020-09-24 17:13:39,947 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9279
[2020-09-24 17:13:39,947 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:13:39,948 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 28
[2020-09-24 17:13:39,948 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 17:13:39,948 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 119
[2020-09-24 17:13:39,948 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:13:40,380 WARN  L193               SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33
[2020-09-24 17:13:40,535 WARN  L193               SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35
[2020-09-24 17:13:40,659 WARN  L193               SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 35
[2020-09-24 17:13:40,799 WARN  L193               SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 37
[2020-09-24 17:13:40,926 WARN  L193               SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34
[2020-09-24 17:13:41,172 WARN  L193               SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 35
[2020-09-24 17:13:41,948 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:13:41,958 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:13:41,966 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:42,005 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:13:42,006 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-24 17:13:42,006 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:13:42,006 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 46
[2020-09-24 17:13:42,006 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:13:42,006 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:13:42,007 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:13:42,007 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 17:13:42,007 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:13:42,128 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 17:13:42,134 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:13:42,140 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:42,180 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:13:42,181 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 18
[2020-09-24 17:13:42,181 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:13:42,181 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 45
[2020-09-24 17:13:42,181 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:13:42,182 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:13:42,182 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-24 17:13:42,182 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 17
[2020-09-24 17:13:42,182 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:13:42,479 INFO  L134       CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:13:42,480 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127889091]
[2020-09-24 17:13:42,480 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:13:42,481 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27
[2020-09-24 17:13:42,481 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101007680]
[2020-09-24 17:13:42,483 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 27 states
[2020-09-24 17:13:42,484 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:13:42,484 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants.
[2020-09-24 17:13:42,485 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702
[2020-09-24 17:13:42,485 INFO  L87              Difference]: Start difference. First operand 897 states and 1070 transitions. Second operand 27 states.
[2020-09-24 17:13:43,690 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83
[2020-09-24 17:13:43,958 WARN  L193               SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86
[2020-09-24 17:13:44,219 WARN  L193               SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 79
[2020-09-24 17:13:44,645 WARN  L193               SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87
[2020-09-24 17:13:45,005 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80
[2020-09-24 17:13:45,554 WARN  L193               SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89
[2020-09-24 17:13:45,783 WARN  L193               SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 76
[2020-09-24 17:13:46,366 WARN  L193               SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79
[2020-09-24 17:13:46,643 WARN  L193               SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76
[2020-09-24 17:13:46,951 WARN  L193               SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 86
[2020-09-24 17:13:47,397 WARN  L193               SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 80
[2020-09-24 17:13:47,668 WARN  L193               SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86
[2020-09-24 17:13:48,080 WARN  L193               SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86
[2020-09-24 17:13:48,593 WARN  L193               SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79
[2020-09-24 17:13:48,881 WARN  L193               SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82
[2020-09-24 17:13:49,157 WARN  L193               SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78
[2020-09-24 17:13:49,418 WARN  L193               SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 86
[2020-09-24 17:13:49,604 WARN  L193               SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 41
[2020-09-24 17:13:49,907 WARN  L193               SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 85
[2020-09-24 17:13:50,045 WARN  L193               SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 42
[2020-09-24 17:13:50,310 WARN  L193               SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75
[2020-09-24 17:13:50,619 WARN  L193               SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 83
[2020-09-24 17:13:50,950 WARN  L193               SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82
[2020-09-24 17:13:51,236 WARN  L193               SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82
[2020-09-24 17:13:51,558 WARN  L193               SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 82
[2020-09-24 17:13:51,861 WARN  L193               SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 80
[2020-09-24 17:13:52,482 WARN  L193               SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79
[2020-09-24 17:13:52,725 WARN  L193               SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 75
[2020-09-24 17:13:53,028 WARN  L193               SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 78
[2020-09-24 17:13:53,426 WARN  L193               SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 75
[2020-09-24 17:13:53,724 WARN  L193               SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 74
[2020-09-24 17:13:54,233 WARN  L193               SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74
[2020-09-24 17:13:54,504 WARN  L193               SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65
[2020-09-24 17:13:54,802 WARN  L193               SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65
[2020-09-24 17:13:55,619 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:13:55,619 INFO  L93              Difference]: Finished difference Result 3067 states and 3935 transitions.
[2020-09-24 17:13:55,620 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. 
[2020-09-24 17:13:55,620 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states. Word has length 164
[2020-09-24 17:13:55,621 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:13:55,633 INFO  L225             Difference]: With dead ends: 3067
[2020-09-24 17:13:55,633 INFO  L226             Difference]: Without dead ends: 2245
[2020-09-24 17:13:55,640 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1507, Invalid=3605, Unknown=0, NotChecked=0, Total=5112
[2020-09-24 17:13:55,643 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 2245 states.
[2020-09-24 17:13:55,714 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 1840.
[2020-09-24 17:13:55,714 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1840 states.
[2020-09-24 17:13:55,722 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1840 states to 1840 states and 2251 transitions.
[2020-09-24 17:13:55,722 INFO  L78                 Accepts]: Start accepts. Automaton has 1840 states and 2251 transitions. Word has length 164
[2020-09-24 17:13:55,723 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:13:55,723 INFO  L479      AbstractCegarLoop]: Abstraction has 1840 states and 2251 transitions.
[2020-09-24 17:13:55,723 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 27 states.
[2020-09-24 17:13:55,724 INFO  L276                IsEmpty]: Start isEmpty. Operand 1840 states and 2251 transitions.
[2020-09-24 17:13:55,731 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 178
[2020-09-24 17:13:55,731 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:13:55,732 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:13:55,732 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:13:55,732 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:13:55,733 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:13:55,733 INFO  L82        PathProgramCache]: Analyzing trace with hash 66852590, now seen corresponding path program 1 times
[2020-09-24 17:13:55,733 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:13:55,733 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188935194]
[2020-09-24 17:13:55,734 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:13:55,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:13:55,779 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:55,843 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:55,928 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:56,155 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:57,029 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:57,380 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:57,492 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:59,665 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:13:59,876 FATAL L256   erpolLogProxyWrapper]: Now shrinking...