/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/Problem01_label42.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:10:35,517 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:10:35,521 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:10:35,548 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:10:35,548 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:10:35,549 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:10:35,551 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:10:35,553 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:10:35,555 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:10:35,556 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 17:10:35,557 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 17:10:35,558 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:10:35,558 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:10:35,560 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:10:35,561 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:10:35,562 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:10:35,563 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:10:35,563 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:10:35,565 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:10:35,567 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:10:35,569 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:10:35,570 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:10:35,572 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:10:35,572 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:10:35,575 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:10:35,576 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:10:35,576 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:10:35,577 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:10:35,577 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:10:35,578 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:10:35,579 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:10:35,579 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:10:35,580 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:10:35,581 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:10:35,582 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:10:35,582 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:10:35,586 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 17:10:35,586 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 17:10:35,586 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 17:10:35,587 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 17:10:35,588 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:10:35,589 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 17:10:35,614 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:10:35,614 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:10:35,615 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:10:35,616 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:10:35,616 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:10:35,616 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:10:35,616 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:10:35,617 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:10:35,617 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:10:35,617 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:10:35,617 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:10:35,617 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:10:35,618 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:10:35,618 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:10:35,618 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:10:35,618 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:10:35,618 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:10:35,619 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:10:35,619 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:10:35,619 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:10:35,619 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:10:35,619 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:10:35,620 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:10:35,620 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:10:35,620 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:10:35,620 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:10:35,621 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:10:35,621 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:10:35,621 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:10:35,621 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 17:10:36,115 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:10:36,134 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:10:36,139 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:10:36,141 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:10:36,141 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:10:36,142 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label42.c
[2020-09-24 17:10:36,222 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c1e197d8/fe455d603b1647ca91398e05ed59a0d4/FLAG31964ce9d
[2020-09-24 17:10:36,908 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:10:36,910 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem01_label42.c
[2020-09-24 17:10:36,927 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c1e197d8/fe455d603b1647ca91398e05ed59a0d4/FLAG31964ce9d
[2020-09-24 17:10:37,128 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1c1e197d8/fe455d603b1647ca91398e05ed59a0d4
[2020-09-24 17:10:37,145 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:10:37,152 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:10:37,155 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:10:37,155 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:10:37,160 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:10:37,161 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:10:37" (1/1) ...
[2020-09-24 17:10:37,166 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f78b0b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37, skipping insertion in model container
[2020-09-24 17:10:37,167 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:10:37" (1/1) ...
[2020-09-24 17:10:37,178 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:10:37,249 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:10:37,714 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:10:37,721 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:10:37,939 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:10:37,966 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:10:37,967 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37 WrapperNode
[2020-09-24 17:10:37,967 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:10:37,968 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:10:37,968 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:10:37,968 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:10:37,982 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37" (1/1) ...
[2020-09-24 17:10:37,982 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37" (1/1) ...
[2020-09-24 17:10:38,003 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37" (1/1) ...
[2020-09-24 17:10:38,003 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37" (1/1) ...
[2020-09-24 17:10:38,065 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37" (1/1) ...
[2020-09-24 17:10:38,077 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37" (1/1) ...
[2020-09-24 17:10:38,090 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37" (1/1) ...
[2020-09-24 17:10:38,100 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:10:38,101 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:10:38,101 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:10:38,101 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:10:38,102 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37" (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 17:10:38,180 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:10:38,180 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:10:38,181 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-09-24 17:10:38,181 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:10:38,181 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-09-24 17:10:38,181 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:10:38,182 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:10:38,182 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 17:10:38,182 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:10:38,182 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:10:38,182 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:10:39,519 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:10:39,520 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 17:10:39,529 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:10:39 BoogieIcfgContainer
[2020-09-24 17:10:39,529 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:10:39,530 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:10:39,531 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:10:39,534 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:10:39,535 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:10:37" (1/3) ...
[2020-09-24 17:10:39,536 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6b3b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:10:39, skipping insertion in model container
[2020-09-24 17:10:39,536 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:10:37" (2/3) ...
[2020-09-24 17:10:39,537 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d6b3b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:10:39, skipping insertion in model container
[2020-09-24 17:10:39,537 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:10:39" (3/3) ...
[2020-09-24 17:10:39,539 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem01_label42.c
[2020-09-24 17:10:39,552 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:10:39,563 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:10:39,586 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:10:39,625 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:10:39,626 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:10:39,626 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:10:39,626 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:10:39,626 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:10:39,626 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:10:39,627 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:10:39,627 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:10:39,663 INFO  L276                IsEmpty]: Start isEmpty. Operand 525 states.
[2020-09-24 17:10:39,686 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 144
[2020-09-24 17:10:39,686 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:10:39,688 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]
[2020-09-24 17:10:39,688 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:10:39,695 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:10:39,695 INFO  L82        PathProgramCache]: Analyzing trace with hash 907543029, now seen corresponding path program 1 times
[2020-09-24 17:10:39,706 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:10:39,706 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424349087]
[2020-09-24 17:10:39,706 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:10:40,006 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:10:40,150 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:10:40,319 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:10:40,825 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:10:41,900 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:10:44,847 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:10:44,934 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:10:45,600 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:10:45,980 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:10:50,844 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:10:50,844 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 152
[2020-09-24 17:10:50,845 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-24 17:10:50,845 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10830
[2020-09-24 17:10:50,846 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:10:50,846 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-09-24 17:10:50,846 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 17:10:50,846 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 79
[2020-09-24 17:10:50,847 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:10:51,586 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:10:51,595 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:10:51,603 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:10:51,690 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:10:51,691 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-24 17:10:51,691 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:10:51,691 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 94
[2020-09-24 17:10:51,691 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:10:51,692 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 17:10:51,692 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:10:51,692 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 20
[2020-09-24 17:10:51,692 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:10:51,965 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 17:10:51,966 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424349087]
[2020-09-24 17:10:51,968 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:10:51,968 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18
[2020-09-24 17:10:51,969 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520723445]
[2020-09-24 17:10:51,975 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-09-24 17:10:51,975 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:10:51,989 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-09-24 17:10:51,990 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306
[2020-09-24 17:10:51,992 INFO  L87              Difference]: Start difference. First operand 525 states. Second operand 18 states.
[2020-09-24 17:10:52,298 WARN  L193               SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 70
[2020-09-24 17:10:52,641 WARN  L193               SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 82
[2020-09-24 17:10:52,799 WARN  L193               SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 90
[2020-09-24 17:10:53,153 WARN  L193               SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89
[2020-09-24 17:10:53,508 WARN  L193               SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 88
[2020-09-24 17:10:54,083 WARN  L193               SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87
[2020-09-24 17:10:55,201 WARN  L193               SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 86
[2020-09-24 17:10:55,796 WARN  L193               SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84
[2020-09-24 17:10:56,579 WARN  L193               SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 81
[2020-09-24 17:10:56,903 WARN  L193               SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 81
[2020-09-24 17:10:57,270 WARN  L193               SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79
[2020-09-24 17:10:58,443 WARN  L193               SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76
[2020-09-24 17:11:01,524 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:11:01,524 INFO  L93              Difference]: Finished difference Result 1701 states and 2422 transitions.
[2020-09-24 17:11:01,525 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-09-24 17:11:01,527 INFO  L78                 Accepts]: Start accepts. Automaton has 18 states. Word has length 143
[2020-09-24 17:11:01,528 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:11:01,556 INFO  L225             Difference]: With dead ends: 1701
[2020-09-24 17:11:01,556 INFO  L226             Difference]: Without dead ends: 1103
[2020-09-24 17:11:01,567 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332
[2020-09-24 17:11:01,588 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1103 states.
[2020-09-24 17:11:01,679 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 985.
[2020-09-24 17:11:01,684 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 985 states.
[2020-09-24 17:11:01,692 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 1149 transitions.
[2020-09-24 17:11:01,695 INFO  L78                 Accepts]: Start accepts. Automaton has 985 states and 1149 transitions. Word has length 143
[2020-09-24 17:11:01,696 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:11:01,696 INFO  L479      AbstractCegarLoop]: Abstraction has 985 states and 1149 transitions.
[2020-09-24 17:11:01,696 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-09-24 17:11:01,696 INFO  L276                IsEmpty]: Start isEmpty. Operand 985 states and 1149 transitions.
[2020-09-24 17:11:01,708 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 161
[2020-09-24 17:11:01,708 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:11:01,708 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:11:01,709 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:11:01,709 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:11:01,709 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:11:01,710 INFO  L82        PathProgramCache]: Analyzing trace with hash 201587256, now seen corresponding path program 1 times
[2020-09-24 17:11:01,710 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:11:01,710 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377675718]
[2020-09-24 17:11:01,711 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:11:01,764 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:11:01,802 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:01,918 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:02,123 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:02,516 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:04,789 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:04,968 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:05,497 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:07,093 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:12,476 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:11:12,477 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 171
[2020-09-24 17:11:12,477 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 8
[2020-09-24 17:11:12,477 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 10711
[2020-09-24 17:11:12,477 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:11:12,477 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 19
[2020-09-24 17:11:12,478 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 41
[2020-09-24 17:11:12,478 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 81
[2020-09-24 17:11:12,478 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:11:13,011 WARN  L193               SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34
[2020-09-24 17:11:13,140 WARN  L193               SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 34
[2020-09-24 17:11:13,270 WARN  L193               SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 35
[2020-09-24 17:11:14,050 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:11:14,054 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:11:14,057 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:14,069 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:11:14,069 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 27
[2020-09-24 17:11:14,069 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:11:14,070 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 14
[2020-09-24 17:11:14,070 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:11:14,070 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:11:14,070 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:11:14,071 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:11:14,071 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:11:14,119 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30
[2020-09-24 17:11:14,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:11:14,127 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:14,147 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:11:14,148 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-09-24 17:11:14,148 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:11:14,148 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 23
[2020-09-24 17:11:14,149 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:11:14,149 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 3
[2020-09-24 17:11:14,149 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:11:14,149 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 4
[2020-09-24 17:11:14,150 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:11:14,328 INFO  L134       CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:11:14,328 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377675718]
[2020-09-24 17:11:14,329 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:11:14,329 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20
[2020-09-24 17:11:14,329 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077902673]
[2020-09-24 17:11:14,331 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-09-24 17:11:14,332 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:11:14,332 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-09-24 17:11:14,333 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380
[2020-09-24 17:11:14,333 INFO  L87              Difference]: Start difference. First operand 985 states and 1149 transitions. Second operand 20 states.
[2020-09-24 17:11:14,891 WARN  L193               SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 89
[2020-09-24 17:11:15,081 WARN  L193               SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 92
[2020-09-24 17:11:15,381 WARN  L193               SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 92
[2020-09-24 17:11:15,779 WARN  L193               SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 92
[2020-09-24 17:11:16,091 WARN  L193               SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 91
[2020-09-24 17:11:16,298 WARN  L193               SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 84
[2020-09-24 17:11:16,864 WARN  L193               SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 91
[2020-09-24 17:11:17,207 WARN  L193               SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 91
[2020-09-24 17:11:17,420 WARN  L193               SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 90
[2020-09-24 17:11:17,712 WARN  L193               SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 83
[2020-09-24 17:11:17,936 WARN  L193               SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 89
[2020-09-24 17:11:18,211 WARN  L193               SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 88
[2020-09-24 17:11:18,372 WARN  L193               SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 81
[2020-09-24 17:11:18,577 WARN  L193               SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 87
[2020-09-24 17:11:18,744 WARN  L193               SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 85
[2020-09-24 17:11:19,833 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:11:19,833 INFO  L93              Difference]: Finished difference Result 2092 states and 2497 transitions.
[2020-09-24 17:11:19,834 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. 
[2020-09-24 17:11:19,834 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 160
[2020-09-24 17:11:19,835 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:11:19,842 INFO  L225             Difference]: With dead ends: 2092
[2020-09-24 17:11:19,843 INFO  L226             Difference]: Without dead ends: 1195
[2020-09-24 17:11:19,847 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=570, Invalid=1152, Unknown=0, NotChecked=0, Total=1722
[2020-09-24 17:11:19,850 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1195 states.
[2020-09-24 17:11:19,902 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1072.
[2020-09-24 17:11:19,903 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1072 states.
[2020-09-24 17:11:19,908 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1249 transitions.
[2020-09-24 17:11:19,909 INFO  L78                 Accepts]: Start accepts. Automaton has 1072 states and 1249 transitions. Word has length 160
[2020-09-24 17:11:19,911 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:11:19,911 INFO  L479      AbstractCegarLoop]: Abstraction has 1072 states and 1249 transitions.
[2020-09-24 17:11:19,912 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-09-24 17:11:19,912 INFO  L276                IsEmpty]: Start isEmpty. Operand 1072 states and 1249 transitions.
[2020-09-24 17:11:19,919 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 165
[2020-09-24 17:11:19,920 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:11:19,921 INFO  L422         BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1]
[2020-09-24 17:11:19,921 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:11:19,921 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:11:19,922 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:11:19,922 INFO  L82        PathProgramCache]: Analyzing trace with hash 1914810438, now seen corresponding path program 1 times
[2020-09-24 17:11:19,922 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:11:19,923 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929021802]
[2020-09-24 17:11:19,923 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:11:19,988 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:11:20,035 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:20,232 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:20,399 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:20,907 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:21,386 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:21,973 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:22,617 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:22,692 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:22,994 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:23,619 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:24,087 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:25,155 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:25,978 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:26,225 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:26,625 FATAL L256   erpolLogProxyWrapper]: Now shrinking...