/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_label05.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:11:36,226 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:11:36,230 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:11:36,266 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:11:36,267 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:11:36,268 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:11:36,270 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:11:36,272 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:11:36,274 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:11:36,275 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 17:11:36,276 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 17:11:36,277 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:11:36,278 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:11:36,279 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:11:36,280 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:11:36,281 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:11:36,282 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:11:36,284 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:11:36,286 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:11:36,288 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:11:36,290 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:11:36,291 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:11:36,292 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:11:36,293 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:11:36,296 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:11:36,296 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:11:36,296 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:11:36,297 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:11:36,298 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:11:36,299 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:11:36,299 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:11:36,300 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:11:36,301 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:11:36,302 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:11:36,303 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:11:36,303 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:11:36,304 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 17:11:36,304 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 17:11:36,305 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 17:11:36,306 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 17:11:36,306 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:11:36,307 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 17:11:36,334 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:11:36,334 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:11:36,338 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:11:36,338 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:11:36,338 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:11:36,338 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:11:36,339 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:11:36,339 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:11:36,339 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:11:36,339 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:11:36,339 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:11:36,340 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:11:36,340 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:11:36,340 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:11:36,340 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:11:36,340 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:11:36,341 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:11:36,341 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:11:36,341 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:11:36,342 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:11:36,342 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:11:36,342 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:11:36,342 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:11:36,343 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:11:36,343 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:11:36,343 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:11:36,343 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:11:36,344 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:11:36,344 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:11:36,344 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 17:11:36,814 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:11:36,832 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:11:36,837 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:11:36,838 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:11:36,839 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:11:36,840 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label05.c
[2020-09-24 17:11:36,931 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/810504414/e7c5515216784828827a25ded80fd0f4/FLAGa371de0d7
[2020-09-24 17:11:37,591 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:11:37,592 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem02_label05.c
[2020-09-24 17:11:37,605 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/810504414/e7c5515216784828827a25ded80fd0f4/FLAGa371de0d7
[2020-09-24 17:11:37,789 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/810504414/e7c5515216784828827a25ded80fd0f4
[2020-09-24 17:11:37,804 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:11:37,810 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:11:37,811 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:11:37,811 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:11:37,815 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:11:37,816 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:11:37" (1/1) ...
[2020-09-24 17:11:37,820 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75e37eeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:37, skipping insertion in model container
[2020-09-24 17:11:37,821 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:11:37" (1/1) ...
[2020-09-24 17:11:37,830 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:11:37,887 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:11:38,300 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:11:38,306 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:11:38,511 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:11:38,533 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:11:38,533 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38 WrapperNode
[2020-09-24 17:11:38,534 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:11:38,534 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:11:38,535 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:11:38,535 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:11:38,552 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38" (1/1) ...
[2020-09-24 17:11:38,553 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38" (1/1) ...
[2020-09-24 17:11:38,570 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38" (1/1) ...
[2020-09-24 17:11:38,571 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38" (1/1) ...
[2020-09-24 17:11:38,607 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38" (1/1) ...
[2020-09-24 17:11:38,626 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38" (1/1) ...
[2020-09-24 17:11:38,630 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38" (1/1) ...
[2020-09-24 17:11:38,636 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:11:38,637 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:11:38,637 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:11:38,637 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:11:38,644 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38" (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 17:11:38,738 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:11:38,738 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:11:38,739 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-09-24 17:11:38,739 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:11:38,739 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-09-24 17:11:38,740 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:11:38,740 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:11:38,740 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-09-24 17:11:38,740 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:11:38,741 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:11:38,741 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:11:40,019 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:11:40,019 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 17:11:40,029 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:11:40 BoogieIcfgContainer
[2020-09-24 17:11:40,029 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:11:40,030 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:11:40,031 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:11:40,034 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:11:40,035 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:11:37" (1/3) ...
[2020-09-24 17:11:40,036 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39890648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:11:40, skipping insertion in model container
[2020-09-24 17:11:40,036 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:11:38" (2/3) ...
[2020-09-24 17:11:40,036 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39890648 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:11:40, skipping insertion in model container
[2020-09-24 17:11:40,037 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:11:40" (3/3) ...
[2020-09-24 17:11:40,039 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem02_label05.c
[2020-09-24 17:11:40,053 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:11:40,069 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:11:40,091 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:11:40,136 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:11:40,137 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:11:40,137 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:11:40,137 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:11:40,137 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:11:40,138 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:11:40,138 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:11:40,138 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:11:40,178 INFO  L276                IsEmpty]: Start isEmpty. Operand 527 states.
[2020-09-24 17:11:40,215 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 153
[2020-09-24 17:11:40,215 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:11:40,217 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:11:40,218 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:11:40,226 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:11:40,226 INFO  L82        PathProgramCache]: Analyzing trace with hash 1976766121, now seen corresponding path program 1 times
[2020-09-24 17:11:40,238 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:11:40,238 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829968196]
[2020-09-24 17:11:40,239 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:11:40,546 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:11:40,680 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:40,870 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:41,152 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:41,351 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:42,850 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:43,187 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:43,587 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:43,830 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:44,304 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:44,585 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:49,548 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:49,780 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:53,017 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:11:53,018 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 161
[2020-09-24 17:11:53,018 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 12
[2020-09-24 17:11:53,018 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 12463
[2020-09-24 17:11:53,020 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:11:53,020 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 22
[2020-09-24 17:11:53,020 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 18
[2020-09-24 17:11:53,020 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 99
[2020-09-24 17:11:53,021 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:11:53,724 WARN  L193               SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33
[2020-09-24 17:11:53,842 WARN  L193               SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33
[2020-09-24 17:11:53,965 WARN  L193               SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34
[2020-09-24 17:11:54,119 WARN  L193               SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33
[2020-09-24 17:11:54,622 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:11:54,629 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:11:54,636 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:11:54,684 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:11:54,684 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-24 17:11:54,684 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:11:54,684 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 53
[2020-09-24 17:11:54,685 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:11:54,685 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:11:54,685 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:11:54,685 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 17:11:54,686 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:11:54,888 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 17:11:54,889 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829968196]
[2020-09-24 17:11:54,891 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:11:54,891 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20
[2020-09-24 17:11:54,892 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439686934]
[2020-09-24 17:11:54,897 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-09-24 17:11:54,898 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:11:54,911 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-09-24 17:11:54,912 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380
[2020-09-24 17:11:54,914 INFO  L87              Difference]: Start difference. First operand 527 states. Second operand 20 states.
[2020-09-24 17:11:55,677 WARN  L193               SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82
[2020-09-24 17:11:55,954 WARN  L193               SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82
[2020-09-24 17:11:56,234 WARN  L193               SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 87
[2020-09-24 17:11:56,567 WARN  L193               SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 83
[2020-09-24 17:11:56,985 WARN  L193               SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82
[2020-09-24 17:11:57,358 WARN  L193               SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75
[2020-09-24 17:11:57,628 WARN  L193               SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82
[2020-09-24 17:11:57,920 WARN  L193               SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 17:11:58,079 WARN  L193               SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 37
[2020-09-24 17:11:58,341 WARN  L193               SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 17:11:59,544 WARN  L193               SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 81
[2020-09-24 17:11:59,757 WARN  L193               SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 17:12:00,291 WARN  L193               SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80
[2020-09-24 17:12:00,767 WARN  L193               SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 75
[2020-09-24 17:12:01,236 WARN  L193               SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 80
[2020-09-24 17:12:01,533 WARN  L193               SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 17:12:01,922 WARN  L193               SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76
[2020-09-24 17:12:02,176 WARN  L193               SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74
[2020-09-24 17:12:02,566 WARN  L193               SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75
[2020-09-24 17:12:02,817 WARN  L193               SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 75
[2020-09-24 17:12:04,243 WARN  L193               SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62
[2020-09-24 17:12:05,744 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:12:05,744 INFO  L93              Difference]: Finished difference Result 1674 states and 2354 transitions.
[2020-09-24 17:12:05,745 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. 
[2020-09-24 17:12:05,747 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 152
[2020-09-24 17:12:05,748 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:12:05,782 INFO  L225             Difference]: With dead ends: 1674
[2020-09-24 17:12:05,782 INFO  L226             Difference]: Without dead ends: 1036
[2020-09-24 17:12:05,793 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=943, Invalid=2479, Unknown=0, NotChecked=0, Total=3422
[2020-09-24 17:12:05,814 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1036 states.
[2020-09-24 17:12:05,906 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 960.
[2020-09-24 17:12:05,908 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 960 states.
[2020-09-24 17:12:05,913 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1135 transitions.
[2020-09-24 17:12:05,915 INFO  L78                 Accepts]: Start accepts. Automaton has 960 states and 1135 transitions. Word has length 152
[2020-09-24 17:12:05,916 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:12:05,916 INFO  L479      AbstractCegarLoop]: Abstraction has 960 states and 1135 transitions.
[2020-09-24 17:12:05,916 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-09-24 17:12:05,916 INFO  L276                IsEmpty]: Start isEmpty. Operand 960 states and 1135 transitions.
[2020-09-24 17:12:05,922 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 177
[2020-09-24 17:12:05,922 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:12:05,923 INFO  L422         BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 17:12:05,923 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:12:05,923 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:12:05,924 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:12:05,924 INFO  L82        PathProgramCache]: Analyzing trace with hash -186709720, now seen corresponding path program 1 times
[2020-09-24 17:12:05,924 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:12:05,925 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [387230260]
[2020-09-24 17:12:05,925 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:12:05,969 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:12:06,007 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:06,083 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:06,584 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:06,716 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:07,994 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:08,078 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:08,159 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:09,228 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:09,678 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:10,342 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:10,507 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:13,884 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:13,937 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:14,801 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:15,688 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:16,649 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:16,738 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:20,504 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:12:20,504 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 187
[2020-09-24 17:12:20,505 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 17
[2020-09-24 17:12:20,505 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 14533
[2020-09-24 17:12:20,505 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:12:20,505 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 8
[2020-09-24 17:12:20,505 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 22
[2020-09-24 17:12:20,506 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 164
[2020-09-24 17:12:20,506 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:12:20,623 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:12:20,636 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:12:20,646 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:20,670 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:12:20,671 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 25
[2020-09-24 17:12:20,671 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:12:20,672 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 33
[2020-09-24 17:12:20,672 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:12:20,672 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:12:20,673 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:12:20,673 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 18
[2020-09-24 17:12:20,673 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:12:20,694 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28
[2020-09-24 17:12:20,701 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:12:20,704 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:20,717 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:20,744 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:12:20,744 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 20
[2020-09-24 17:12:20,744 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-09-24 17:12:20,745 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 42
[2020-09-24 17:12:20,745 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:12:20,745 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:12:20,745 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-09-24 17:12:20,745 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 19
[2020-09-24 17:12:20,746 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:12:20,846 INFO  L134       CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked.
[2020-09-24 17:12:20,846 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [387230260]
[2020-09-24 17:12:20,847 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-09-24 17:12:20,847 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6
[2020-09-24 17:12:20,847 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844013488]
[2020-09-24 17:12:20,849 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 17:12:20,849 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:12:20,850 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 17:12:20,850 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:12:20,850 INFO  L87              Difference]: Start difference. First operand 960 states and 1135 transitions. Second operand 6 states.
[2020-09-24 17:12:22,661 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:12:22,662 INFO  L93              Difference]: Finished difference Result 2206 states and 2713 transitions.
[2020-09-24 17:12:22,662 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 17:12:22,662 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 176
[2020-09-24 17:12:22,664 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:12:22,671 INFO  L225             Difference]: With dead ends: 2206
[2020-09-24 17:12:22,672 INFO  L226             Difference]: Without dead ends: 1268
[2020-09-24 17:12:22,677 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:12:22,680 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 1268 states.
[2020-09-24 17:12:22,730 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1108.
[2020-09-24 17:12:22,730 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 1108 states.
[2020-09-24 17:12:22,738 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1347 transitions.
[2020-09-24 17:12:22,738 INFO  L78                 Accepts]: Start accepts. Automaton has 1108 states and 1347 transitions. Word has length 176
[2020-09-24 17:12:22,740 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:12:22,740 INFO  L479      AbstractCegarLoop]: Abstraction has 1108 states and 1347 transitions.
[2020-09-24 17:12:22,740 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 17:12:22,741 INFO  L276                IsEmpty]: Start isEmpty. Operand 1108 states and 1347 transitions.
[2020-09-24 17:12:22,751 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 191
[2020-09-24 17:12:22,751 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:12:22,752 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:12:22,752 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:12:22,753 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:12:22,753 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:12:22,753 INFO  L82        PathProgramCache]: Analyzing trace with hash 1868326385, now seen corresponding path program 1 times
[2020-09-24 17:12:22,754 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:12:22,754 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72041709]
[2020-09-24 17:12:22,754 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:12:22,806 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:12:22,851 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:22,934 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:23,425 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:24,016 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:24,174 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:24,430 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:26,370 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:26,456 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:26,751 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:26,806 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:27,448 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:27,522 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:27,727 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:12:27,804 FATAL L256   erpolLogProxyWrapper]: Now shrinking...