/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem05_label45.c


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


This is Ultimate 0.1.25-adbd35c
[2020-10-14 19:45:57,964 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-14 19:45:57,966 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-14 19:45:57,991 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-14 19:45:57,991 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-14 19:45:57,993 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-14 19:45:57,994 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-14 19:45:57,996 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-14 19:45:57,998 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-14 19:45:57,999 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-14 19:45:58,000 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-14 19:45:58,001 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-14 19:45:58,002 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-14 19:45:58,003 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-14 19:45:58,004 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-14 19:45:58,005 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-14 19:45:58,006 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-14 19:45:58,007 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-14 19:45:58,009 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-14 19:45:58,011 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-14 19:45:58,013 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-14 19:45:58,014 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-14 19:45:58,016 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-14 19:45:58,017 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-14 19:45:58,019 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-14 19:45:58,020 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-14 19:45:58,020 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-14 19:45:58,021 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-14 19:45:58,022 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-14 19:45:58,023 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-14 19:45:58,023 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-14 19:45:58,024 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-14 19:45:58,025 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-14 19:45:58,026 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-14 19:45:58,027 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-14 19:45:58,027 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-14 19:45:58,028 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-14 19:45:58,028 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-14 19:45:58,028 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-14 19:45:58,029 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-14 19:45:58,030 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-14 19:45:58,031 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
[2020-10-14 19:45:58,056 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-14 19:45:58,056 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-14 19:45:58,057 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-14 19:45:58,058 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-14 19:45:58,058 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-14 19:45:58,058 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-14 19:45:58,058 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-14 19:45:58,058 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-14 19:45:58,059 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-14 19:45:58,059 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-14 19:45:58,059 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-14 19:45:58,059 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-14 19:45:58,060 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-14 19:45:58,060 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-14 19:45:58,060 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-14 19:45:58,060 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-14 19:45:58,060 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-14 19:45:58,061 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-14 19:45:58,061 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-14 19:45:58,061 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-14 19:45:58,061 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-14 19:45:58,061 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-14 19:45:58,062 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-14 19:45:58,062 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-14 19:45:58,062 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-14 19:45:58,062 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-14 19:45:58,062 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-14 19:45:58,063 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-14 19:45:58,063 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-14 19:45:58,063 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 -> SequenceOfStatements
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true;
[2020-10-14 19:45:58,420 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-14 19:45:58,433 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-14 19:45:58,437 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-14 19:45:58,439 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-14 19:45:58,439 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-14 19:45:58,440 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label45.c
[2020-10-14 19:45:58,532 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd3aba291/b95e0a4d2499496e803bc6b11c4ed263/FLAGf66768fac
[2020-10-14 19:45:59,538 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-14 19:45:59,539 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label45.c
[2020-10-14 19:45:59,603 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd3aba291/b95e0a4d2499496e803bc6b11c4ed263/FLAGf66768fac
[2020-10-14 19:45:59,860 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd3aba291/b95e0a4d2499496e803bc6b11c4ed263
[2020-10-14 19:45:59,873 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-14 19:45:59,875 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-14 19:45:59,878 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-14 19:45:59,878 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-14 19:45:59,882 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-14 19:45:59,884 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:45:59" (1/1) ...
[2020-10-14 19:45:59,888 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12925ca7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:45:59, skipping insertion in model container
[2020-10-14 19:45:59,889 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:45:59" (1/1) ...
[2020-10-14 19:45:59,899 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-14 19:46:00,146 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-14 19:46:02,803 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-14 19:46:02,810 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-14 19:46:03,918 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-14 19:46:03,983 INFO  L208         MainTranslator]: Completed translation
[2020-10-14 19:46:03,985 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03 WrapperNode
[2020-10-14 19:46:03,985 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-14 19:46:03,986 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-14 19:46:03,987 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-14 19:46:03,987 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-14 19:46:04,002 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03" (1/1) ...
[2020-10-14 19:46:04,003 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03" (1/1) ...
[2020-10-14 19:46:04,083 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03" (1/1) ...
[2020-10-14 19:46:04,083 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03" (1/1) ...
[2020-10-14 19:46:04,249 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03" (1/1) ...
[2020-10-14 19:46:04,322 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03" (1/1) ...
[2020-10-14 19:46:04,366 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03" (1/1) ...
[2020-10-14 19:46:04,424 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-14 19:46:04,425 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-14 19:46:04,425 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-14 19:46:04,425 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-14 19:46:04,427 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03" (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
[2020-10-14 19:46:04,500 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-14 19:46:04,500 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-14 19:46:04,500 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-14 19:46:04,501 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-14 19:46:04,501 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-14 19:46:04,501 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-14 19:46:04,501 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-14 19:46:04,501 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-14 19:46:04,501 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-14 19:46:04,502 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-14 19:46:04,502 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-14 19:46:04,502 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-14 19:46:04,502 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-14 19:46:04,502 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-14 19:46:04,503 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-14 19:46:04,503 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-14 19:46:04,503 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-14 19:46:04,503 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-14 19:46:04,503 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-14 19:46:04,504 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-10-14 19:46:04,504 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-14 19:46:04,504 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-14 19:46:04,504 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-14 19:46:04,504 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-14 19:46:04,504 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-14 19:46:12,762 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-14 19:46:12,763 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-14 19:46:12,781 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:46:12 BoogieIcfgContainer
[2020-10-14 19:46:12,781 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-14 19:46:12,784 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-14 19:46:12,784 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-14 19:46:12,787 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-14 19:46:12,788 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:45:59" (1/3) ...
[2020-10-14 19:46:12,788 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b8cc6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:46:12, skipping insertion in model container
[2020-10-14 19:46:12,789 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:46:03" (2/3) ...
[2020-10-14 19:46:12,789 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b8cc6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:46:12, skipping insertion in model container
[2020-10-14 19:46:12,789 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:46:12" (3/3) ...
[2020-10-14 19:46:12,791 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem05_label45.c
[2020-10-14 19:46:12,801 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-14 19:46:12,811 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-14 19:46:12,825 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-14 19:46:12,860 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-10-14 19:46:12,860 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-10-14 19:46:12,860 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-14 19:46:12,860 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-14 19:46:12,860 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-14 19:46:12,860 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-10-14 19:46:12,860 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-14 19:46:12,861 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-14 19:46:12,910 INFO  L276                IsEmpty]: Start isEmpty. Operand 2222 states.
[2020-10-14 19:46:13,012 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1696
[2020-10-14 19:46:13,012 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 19:46:13,014 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-14 19:46:13,015 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 19:46:13,021 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 19:46:13,022 INFO  L82        PathProgramCache]: Analyzing trace with hash -114064752, now seen corresponding path program 1 times
[2020-10-14 19:46:13,031 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 19:46:13,032 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483328498]
[2020-10-14 19:46:13,033 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 19:46:14,269 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:46:15,122 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:46:19,384 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:46:19,384 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1717
[2020-10-14 19:46:19,384 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:46:19,384 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5104
[2020-10-14 19:46:19,387 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:46:19,388 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:46:19,388 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-14 19:46:19,388 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-14 19:46:19,388 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1711
[2020-10-14 19:46:19,389 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-10-14 19:46:21,081 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 19:46:21,085 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:46:21,087 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:46:21,095 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:46:21,095 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 19:46:21,096 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:46:21,096 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-10-14 19:46:21,096 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:46:21,096 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:46:21,097 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 19:46:21,097 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:46:21,097 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-14 19:46:21,097 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:46:24,196 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-14 19:46:24,196 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483328498]
[2020-10-14 19:46:24,198 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-14 19:46:24,199 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-14 19:46:24,199 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347805242]
[2020-10-14 19:46:24,209 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-14 19:46:24,209 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 19:46:24,224 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-14 19:46:24,227 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-14 19:46:24,230 INFO  L87              Difference]: Start difference. First operand 2222 states. Second operand 5 states.
[2020-10-14 19:46:49,280 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 19:46:49,281 INFO  L93              Difference]: Finished difference Result 8125 states and 15405 transitions.
[2020-10-14 19:46:49,283 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-14 19:46:49,285 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1695
[2020-10-14 19:46:49,303 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 19:46:49,369 INFO  L225             Difference]: With dead ends: 8125
[2020-10-14 19:46:49,369 INFO  L226             Difference]: Without dead ends: 5835
[2020-10-14 19:46:49,385 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42
[2020-10-14 19:46:49,415 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5835 states.
[2020-10-14 19:46:49,630 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5835 to 5801.
[2020-10-14 19:46:49,632 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5801 states.
[2020-10-14 19:46:49,660 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5801 states to 5801 states and 9384 transitions.
[2020-10-14 19:46:49,662 INFO  L78                 Accepts]: Start accepts. Automaton has 5801 states and 9384 transitions. Word has length 1695
[2020-10-14 19:46:49,668 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 19:46:49,668 INFO  L479      AbstractCegarLoop]: Abstraction has 5801 states and 9384 transitions.
[2020-10-14 19:46:49,668 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-14 19:46:49,668 INFO  L276                IsEmpty]: Start isEmpty. Operand 5801 states and 9384 transitions.
[2020-10-14 19:46:49,835 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1720
[2020-10-14 19:46:49,835 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 19:46:49,836 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-14 19:46:49,837 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-14 19:46:49,837 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 19:46:49,837 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 19:46:49,838 INFO  L82        PathProgramCache]: Analyzing trace with hash 675627971, now seen corresponding path program 1 times
[2020-10-14 19:46:49,839 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 19:46:49,839 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1685781520]
[2020-10-14 19:46:49,840 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 19:46:49,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:46:49,979 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:46:50,060 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:46:50,750 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:46:55,103 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:46:55,104 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1745
[2020-10-14 19:46:55,104 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-14 19:46:55,104 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5150
[2020-10-14 19:46:55,105 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:46:55,106 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:46:55,106 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 32
[2020-10-14 19:46:55,106 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 36
[2020-10-14 19:46:55,107 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1294
[2020-10-14 19:46:55,107 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-14 19:47:02,142 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 19:47:02,145 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:47:02,146 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:47:02,153 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:47:02,154 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 19:47:02,154 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:47:02,154 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8
[2020-10-14 19:47:02,154 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:47:02,155 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:47:02,155 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 19:47:02,155 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:47:02,155 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 19:47:02,155 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:47:02,193 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 19:47:02,195 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:47:02,196 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:47:02,203 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:47:02,203 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-10-14 19:47:02,203 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:47:02,204 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-10-14 19:47:02,204 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:47:02,204 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:47:02,204 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 19:47:02,205 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:47:02,205 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 19:47:02,205 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:47:02,208 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-10-14 19:47:02,214 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:47:02,220 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:47:02,244 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:47:02,244 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 16
[2020-10-14 19:47:02,245 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:47:02,245 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 29
[2020-10-14 19:47:02,245 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:47:02,245 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:47:02,245 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 19:47:02,246 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:47:02,246 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-10-14 19:47:02,246 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:47:18,926 INFO  L134       CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-10-14 19:47:18,927 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1685781520]
[2020-10-14 19:47:18,927 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-14 19:47:18,927 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23
[2020-10-14 19:47:18,928 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915230829]
[2020-10-14 19:47:18,932 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-10-14 19:47:18,932 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 19:47:18,932 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-10-14 19:47:18,933 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506
[2020-10-14 19:47:18,933 INFO  L87              Difference]: Start difference. First operand 5801 states and 9384 transitions. Second operand 23 states.
[2020-10-14 19:47:40,128 WARN  L193               SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 76
[2020-10-14 19:48:16,196 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 19:48:16,197 INFO  L93              Difference]: Finished difference Result 12907 states and 21400 transitions.
[2020-10-14 19:48:16,199 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. 
[2020-10-14 19:48:16,200 INFO  L78                 Accepts]: Start accepts. Automaton has 23 states. Word has length 1719
[2020-10-14 19:48:16,202 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 19:48:16,233 INFO  L225             Difference]: With dead ends: 12907
[2020-10-14 19:48:16,233 INFO  L226             Difference]: Without dead ends: 7112
[2020-10-14 19:48:16,247 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=212, Invalid=1428, Unknown=0, NotChecked=0, Total=1640
[2020-10-14 19:48:16,256 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 7112 states.
[2020-10-14 19:48:16,389 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 7112 to 7105.
[2020-10-14 19:48:16,390 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 7105 states.
[2020-10-14 19:48:16,408 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 7105 states to 7105 states and 10722 transitions.
[2020-10-14 19:48:16,409 INFO  L78                 Accepts]: Start accepts. Automaton has 7105 states and 10722 transitions. Word has length 1719
[2020-10-14 19:48:16,411 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 19:48:16,411 INFO  L479      AbstractCegarLoop]: Abstraction has 7105 states and 10722 transitions.
[2020-10-14 19:48:16,411 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-10-14 19:48:16,411 INFO  L276                IsEmpty]: Start isEmpty. Operand 7105 states and 10722 transitions.
[2020-10-14 19:48:16,489 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1723
[2020-10-14 19:48:16,489 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 19:48:16,490 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-10-14 19:48:16,491 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-14 19:48:16,491 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 19:48:16,491 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 19:48:16,492 INFO  L82        PathProgramCache]: Analyzing trace with hash 1136884491, now seen corresponding path program 1 times
[2020-10-14 19:48:16,492 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 19:48:16,492 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698043576]
[2020-10-14 19:48:16,493 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 19:48:16,578 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:48:16,606 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:48:16,659 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:48:16,812 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:48:17,670 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:48:21,620 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:48:21,620 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1748
[2020-10-14 19:48:21,620 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-10-14 19:48:21,621 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5038
[2020-10-14 19:48:21,621 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:48:21,621 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:48:21,621 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 27
[2020-10-14 19:48:21,621 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 19
[2020-10-14 19:48:21,622 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 798
[2020-10-14 19:48:21,622 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:48:25,190 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 19:48:25,192 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:48:25,193 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:48:25,195 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:48:25,195 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 19:48:25,196 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:48:25,196 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-10-14 19:48:25,196 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:48:25,196 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:48:25,196 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 19:48:25,197 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:48:25,197 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 19:48:25,197 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:48:25,240 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 19:48:25,243 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:48:25,245 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:48:25,253 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:48:25,253 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-10-14 19:48:25,254 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 19:48:25,254 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-10-14 19:48:25,254 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:48:25,254 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:48:25,254 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 19:48:25,255 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 19:48:25,255 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 4
[2020-10-14 19:48:25,255 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:48:25,259 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17
[2020-10-14 19:48:25,263 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:48:25,266 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:48:25,278 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:48:25,305 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:48:25,323 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 19:48:25,323 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 19
[2020-10-14 19:48:25,323 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-14 19:48:25,323 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 58
[2020-10-14 19:48:25,324 FATAL L256   erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE
[2020-10-14 19:48:25,324 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.2
[2020-10-14 19:48:25,324 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 19:48:25,325 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-14 19:48:25,325 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 19
[2020-10-14 19:48:25,325 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 19:48:35,225 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-10-14 19:48:35,226 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698043576]
[2020-10-14 19:48:35,226 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-14 19:48:35,227 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22
[2020-10-14 19:48:35,227 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421446793]
[2020-10-14 19:48:35,229 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 22 states
[2020-10-14 19:48:35,230 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 19:48:35,230 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants.
[2020-10-14 19:48:35,231 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462
[2020-10-14 19:48:35,231 INFO  L87              Difference]: Start difference. First operand 7105 states and 10722 transitions. Second operand 22 states.
[2020-10-14 19:49:42,809 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 19:49:42,809 INFO  L93              Difference]: Finished difference Result 25115 states and 40241 transitions.
[2020-10-14 19:49:42,811 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-14 19:49:42,811 INFO  L78                 Accepts]: Start accepts. Automaton has 22 states. Word has length 1722
[2020-10-14 19:49:42,812 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 19:49:42,901 INFO  L225             Difference]: With dead ends: 25115
[2020-10-14 19:49:42,901 INFO  L226             Difference]: Without dead ends: 18016
[2020-10-14 19:49:42,920 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702
[2020-10-14 19:49:42,943 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 18016 states.
[2020-10-14 19:49:43,347 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 18016 to 17984.
[2020-10-14 19:49:43,347 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 17984 states.
[2020-10-14 19:49:43,394 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17984 states to 17984 states and 23613 transitions.
[2020-10-14 19:49:43,394 INFO  L78                 Accepts]: Start accepts. Automaton has 17984 states and 23613 transitions. Word has length 1722
[2020-10-14 19:49:43,395 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 19:49:43,395 INFO  L479      AbstractCegarLoop]: Abstraction has 17984 states and 23613 transitions.
[2020-10-14 19:49:43,395 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 22 states.
[2020-10-14 19:49:43,395 INFO  L276                IsEmpty]: Start isEmpty. Operand 17984 states and 23613 transitions.
[2020-10-14 19:49:43,485 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1729
[2020-10-14 19:49:43,485 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 19:49:43,487 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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[2020-10-14 19:49:43,487 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-14 19:49:43,487 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 19:49:43,488 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 19:49:43,488 INFO  L82        PathProgramCache]: Analyzing trace with hash -360904267, now seen corresponding path program 1 times
[2020-10-14 19:49:43,489 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 19:49:43,490 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346429193]
[2020-10-14 19:49:43,490 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 19:49:43,614 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 19:49:43,653 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:49:43,734 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:49:43,872 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 19:49:44,471 FATAL L256   erpolLogProxyWrapper]: Now shrinking...