/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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_label06.c


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


This is Ultimate 0.1.25-adbd35c
[2020-10-14 01:13:51,829 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-10-14 01:13:51,833 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-10-14 01:13:51,874 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-10-14 01:13:51,874 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-10-14 01:13:51,882 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-10-14 01:13:51,884 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-10-14 01:13:51,888 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-10-14 01:13:51,891 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-10-14 01:13:51,894 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-10-14 01:13:51,895 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-10-14 01:13:51,896 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-10-14 01:13:51,896 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-10-14 01:13:51,899 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-10-14 01:13:51,902 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-10-14 01:13:51,904 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-10-14 01:13:51,905 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-10-14 01:13:51,906 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-10-14 01:13:51,908 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-10-14 01:13:51,918 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-10-14 01:13:51,920 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-10-14 01:13:51,921 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-10-14 01:13:51,922 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-10-14 01:13:51,923 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-10-14 01:13:51,935 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-10-14 01:13:51,935 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-10-14 01:13:51,935 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-10-14 01:13:51,936 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-10-14 01:13:51,937 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-10-14 01:13:51,937 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-10-14 01:13:51,938 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-10-14 01:13:51,938 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-10-14 01:13:51,939 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-10-14 01:13:51,939 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-10-14 01:13:51,940 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-10-14 01:13:51,941 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-10-14 01:13:51,941 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-10-14 01:13:51,941 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-10-14 01:13:51,942 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-10-14 01:13:51,942 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-10-14 01:13:51,943 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-10-14 01:13:51,944 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 01:13:51,965 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-10-14 01:13:51,966 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-10-14 01:13:51,967 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-10-14 01:13:51,967 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-10-14 01:13:51,967 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-10-14 01:13:51,968 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-10-14 01:13:51,968 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-10-14 01:13:51,968 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-10-14 01:13:51,968 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-10-14 01:13:51,968 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-10-14 01:13:51,968 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-10-14 01:13:51,969 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-10-14 01:13:51,969 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-10-14 01:13:51,969 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-10-14 01:13:51,969 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-10-14 01:13:51,969 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-10-14 01:13:51,970 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-10-14 01:13:51,970 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-10-14 01:13:51,970 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-10-14 01:13:51,970 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-10-14 01:13:51,970 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-10-14 01:13:51,971 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-10-14 01:13:51,971 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-10-14 01:13:51,971 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-10-14 01:13:51,971 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-10-14 01:13:51,971 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-10-14 01:13:51,972 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-10-14 01:13:51,972 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-10-14 01:13:51,972 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-10-14 01:13:51,972 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true;
[2020-10-14 01:13:52,300 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-10-14 01:13:52,313 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-10-14 01:13:52,317 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-10-14 01:13:52,318 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-10-14 01:13:52,319 INFO  L275        PluginConnector]: CDTParser initialized
[2020-10-14 01:13:52,320 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem05_label06.c
[2020-10-14 01:13:52,396 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb68d81de/ce427665df70432ab42ba82297d31356/FLAG9102e35fc
[2020-10-14 01:13:53,311 INFO  L306              CDTParser]: Found 1 translation units.
[2020-10-14 01:13:53,312 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem05_label06.c
[2020-10-14 01:13:53,362 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb68d81de/ce427665df70432ab42ba82297d31356/FLAG9102e35fc
[2020-10-14 01:13:53,761 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cb68d81de/ce427665df70432ab42ba82297d31356
[2020-10-14 01:13:53,772 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-10-14 01:13:53,773 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-10-14 01:13:53,775 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-10-14 01:13:53,775 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-10-14 01:13:53,780 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-10-14 01:13:53,781 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:13:53" (1/1) ...
[2020-10-14 01:13:53,784 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4839a71c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:53, skipping insertion in model container
[2020-10-14 01:13:53,785 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 01:13:53" (1/1) ...
[2020-10-14 01:13:53,793 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-10-14 01:13:54,044 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-10-14 01:13:56,418 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-14 01:13:56,424 INFO  L203         MainTranslator]: Completed pre-run
[2020-10-14 01:13:57,639 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-10-14 01:13:57,712 INFO  L208         MainTranslator]: Completed translation
[2020-10-14 01:13:57,713 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57 WrapperNode
[2020-10-14 01:13:57,713 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-10-14 01:13:57,714 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-10-14 01:13:57,714 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-10-14 01:13:57,714 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-10-14 01:13:57,733 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57" (1/1) ...
[2020-10-14 01:13:57,735 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57" (1/1) ...
[2020-10-14 01:13:57,826 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57" (1/1) ...
[2020-10-14 01:13:57,826 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57" (1/1) ...
[2020-10-14 01:13:57,987 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57" (1/1) ...
[2020-10-14 01:13:58,166 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57" (1/1) ...
[2020-10-14 01:13:58,242 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57" (1/1) ...
[2020-10-14 01:13:58,309 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-10-14 01:13:58,310 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-10-14 01:13:58,310 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-10-14 01:13:58,310 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-10-14 01:13:58,311 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57" (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 01:13:58,384 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-10-14 01:13:58,384 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-10-14 01:13:58,384 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output
[2020-10-14 01:13:58,384 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output2
[2020-10-14 01:13:58,384 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output3
[2020-10-14 01:13:58,385 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output4
[2020-10-14 01:13:58,385 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output5
[2020-10-14 01:13:58,385 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output6
[2020-10-14 01:13:58,385 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output7
[2020-10-14 01:13:58,385 INFO  L138     BoogieDeclarations]: Found implementation of procedure calculate_output8
[2020-10-14 01:13:58,385 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-10-14 01:13:58,386 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output
[2020-10-14 01:13:58,386 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output2
[2020-10-14 01:13:58,386 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output3
[2020-10-14 01:13:58,386 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output4
[2020-10-14 01:13:58,386 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output5
[2020-10-14 01:13:58,387 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output6
[2020-10-14 01:13:58,387 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output7
[2020-10-14 01:13:58,387 INFO  L130     BoogieDeclarations]: Found specification of procedure calculate_output8
[2020-10-14 01:13:58,387 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-10-14 01:13:58,387 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-10-14 01:13:58,388 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-10-14 01:13:58,388 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-10-14 01:13:58,388 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-10-14 01:13:58,388 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-10-14 01:14:06,100 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-10-14 01:14:06,101 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-10-14 01:14:06,115 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:14:06 BoogieIcfgContainer
[2020-10-14 01:14:06,115 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-10-14 01:14:06,116 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-10-14 01:14:06,117 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-10-14 01:14:06,120 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-10-14 01:14:06,120 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 01:13:53" (1/3) ...
[2020-10-14 01:14:06,121 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133d2a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:14:06, skipping insertion in model container
[2020-10-14 01:14:06,121 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 01:13:57" (2/3) ...
[2020-10-14 01:14:06,122 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@133d2a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 01:14:06, skipping insertion in model container
[2020-10-14 01:14:06,122 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 01:14:06" (3/3) ...
[2020-10-14 01:14:06,124 INFO  L109   eAbstractionObserver]: Analyzing ICFG Problem05_label06.c
[2020-10-14 01:14:06,134 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-10-14 01:14:06,144 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-10-14 01:14:06,159 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-10-14 01:14:06,191 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-10-14 01:14:06,191 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-10-14 01:14:06,191 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-10-14 01:14:06,191 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-10-14 01:14:06,192 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-10-14 01:14:06,192 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-10-14 01:14:06,192 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-10-14 01:14:06,192 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-10-14 01:14:06,242 INFO  L276                IsEmpty]: Start isEmpty. Operand 2222 states.
[2020-10-14 01:14:06,338 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1691
[2020-10-14 01:14:06,338 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 01:14:06,341 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]
[2020-10-14 01:14:06,341 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 01:14:06,346 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 01:14:06,347 INFO  L82        PathProgramCache]: Analyzing trace with hash 309099633, now seen corresponding path program 1 times
[2020-10-14 01:14:06,354 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 01:14:06,355 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024122251]
[2020-10-14 01:14:06,356 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 01:14:07,449 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:14:07,945 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:14:12,479 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:14:12,480 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1712
[2020-10-14 01:14:12,480 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:14:12,480 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5022
[2020-10-14 01:14:12,482 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:14:12,483 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:14:12,483 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 20
[2020-10-14 01:14:12,483 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-14 01:14:12,483 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1706
[2020-10-14 01:14:12,484 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 3
[2020-10-14 01:14:14,171 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 01:14:14,176 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:14:14,179 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:14:14,186 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:14:14,187 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 01:14:14,187 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:14:14,187 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-10-14 01:14:14,188 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:14:14,188 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:14:14,188 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 01:14:14,189 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 01:14:14,189 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-14 01:14:14,189 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 01:14:17,397 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 01:14:17,398 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024122251]
[2020-10-14 01:14:17,399 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-14 01:14:17,400 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-10-14 01:14:17,401 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358512846]
[2020-10-14 01:14:17,409 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-10-14 01:14:17,409 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 01:14:17,422 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-10-14 01:14:17,423 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20
[2020-10-14 01:14:17,425 INFO  L87              Difference]: Start difference. First operand 2222 states. Second operand 5 states.
[2020-10-14 01:14:41,103 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 01:14:41,104 INFO  L93              Difference]: Finished difference Result 8124 states and 15411 transitions.
[2020-10-14 01:14:41,104 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-10-14 01:14:41,106 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 1690
[2020-10-14 01:14:41,113 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 01:14:41,163 INFO  L225             Difference]: With dead ends: 8124
[2020-10-14 01:14:41,163 INFO  L226             Difference]: Without dead ends: 5834
[2020-10-14 01:14:41,175 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 01:14:41,206 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 5834 states.
[2020-10-14 01:14:41,392 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 5834 to 5801.
[2020-10-14 01:14:41,394 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 5801 states.
[2020-10-14 01:14:41,425 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 5801 states to 5801 states and 9374 transitions.
[2020-10-14 01:14:41,427 INFO  L78                 Accepts]: Start accepts. Automaton has 5801 states and 9374 transitions. Word has length 1690
[2020-10-14 01:14:41,432 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 01:14:41,432 INFO  L479      AbstractCegarLoop]: Abstraction has 5801 states and 9374 transitions.
[2020-10-14 01:14:41,432 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-10-14 01:14:41,432 INFO  L276                IsEmpty]: Start isEmpty. Operand 5801 states and 9374 transitions.
[2020-10-14 01:14:41,741 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1700
[2020-10-14 01:14:41,741 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 01:14:41,742 INFO  L422         BasicCegarLoop]: trace histogram [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, 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]
[2020-10-14 01:14:41,743 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-10-14 01:14:41,743 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 01:14:41,743 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 01:14:41,744 INFO  L82        PathProgramCache]: Analyzing trace with hash -782889754, now seen corresponding path program 1 times
[2020-10-14 01:14:41,745 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 01:14:41,745 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089410680]
[2020-10-14 01:14:41,745 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 01:14:41,878 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:14:41,908 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:14:44,427 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:14:46,898 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:14:46,899 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1723
[2020-10-14 01:14:46,899 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-14 01:14:46,899 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5017
[2020-10-14 01:14:46,900 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:14:46,900 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:14:46,901 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-14 01:14:46,901 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-14 01:14:46,901 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 15
[2020-10-14 01:14:46,901 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 01:14:47,401 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 01:14:47,404 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:14:47,406 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:14:47,412 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:14:47,412 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 01:14:47,412 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:14:47,412 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-10-14 01:14:47,413 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:14:47,413 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:14:47,413 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 01:14:47,413 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 01:14:47,414 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-14 01:14:47,414 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 01:14:47,441 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 01:14:47,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:14:47,446 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:14:47,459 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:14:47,459 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 10
[2020-10-14 01:14:47,460 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:14:47,460 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 14
[2020-10-14 01:14:47,460 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:14:47,460 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:14:47,460 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 01:14:47,461 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-14 01:14:47,461 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-10-14 01:14:47,461 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 01:14:48,461 INFO  L134       CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-14 01:14:48,461 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089410680]
[2020-10-14 01:14:48,461 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-14 01:14:48,462 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-10-14 01:14:48,462 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420760196]
[2020-10-14 01:14:48,467 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-10-14 01:14:48,468 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 01:14:48,468 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-10-14 01:14:48,468 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-10-14 01:14:48,468 INFO  L87              Difference]: Start difference. First operand 5801 states and 9374 transitions. Second operand 8 states.
[2020-10-14 01:15:19,129 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 01:15:19,130 INFO  L93              Difference]: Finished difference Result 22660 states and 37795 transitions.
[2020-10-14 01:15:19,134 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. 
[2020-10-14 01:15:19,135 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 1699
[2020-10-14 01:15:19,135 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 01:15:19,226 INFO  L225             Difference]: With dead ends: 22660
[2020-10-14 01:15:19,227 INFO  L226             Difference]: Without dead ends: 16865
[2020-10-14 01:15:19,244 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240
[2020-10-14 01:15:19,263 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16865 states.
[2020-10-14 01:15:19,629 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16865 to 16671.
[2020-10-14 01:15:19,629 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16671 states.
[2020-10-14 01:15:19,675 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16671 states to 16671 states and 26104 transitions.
[2020-10-14 01:15:19,676 INFO  L78                 Accepts]: Start accepts. Automaton has 16671 states and 26104 transitions. Word has length 1699
[2020-10-14 01:15:19,677 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 01:15:19,677 INFO  L479      AbstractCegarLoop]: Abstraction has 16671 states and 26104 transitions.
[2020-10-14 01:15:19,677 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-10-14 01:15:19,677 INFO  L276                IsEmpty]: Start isEmpty. Operand 16671 states and 26104 transitions.
[2020-10-14 01:15:19,939 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1714
[2020-10-14 01:15:19,939 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 01:15:19,940 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 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 01:15:19,941 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-10-14 01:15:19,941 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 01:15:19,942 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 01:15:19,942 INFO  L82        PathProgramCache]: Analyzing trace with hash -1269568642, now seen corresponding path program 1 times
[2020-10-14 01:15:19,942 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 01:15:19,943 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024633066]
[2020-10-14 01:15:19,943 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 01:15:20,101 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:15:20,185 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:20,567 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:21,085 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:25,259 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:15:25,260 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1739
[2020-10-14 01:15:25,260 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-14 01:15:25,260 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5155
[2020-10-14 01:15:25,260 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:15:25,260 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:15:25,261 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 01:15:25,261 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 21
[2020-10-14 01:15:25,261 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 15
[2020-10-14 01:15:25,261 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 01:15:26,160 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 01:15:26,163 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:15:26,164 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:26,168 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:15:26,168 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 01:15:26,168 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:15:26,169 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-10-14 01:15:26,169 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:15:26,169 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:15:26,170 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 01:15:26,170 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 01:15:26,170 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 01:15:26,171 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 01:15:26,203 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 01:15:26,207 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:15:26,211 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:26,225 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:15:26,225 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 12
[2020-10-14 01:15:26,226 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:15:26,226 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 16
[2020-10-14 01:15:26,226 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:15:26,227 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:15:26,227 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 01:15:26,228 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 01:15:26,228 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 6
[2020-10-14 01:15:26,228 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-14 01:15:26,238 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19
[2020-10-14 01:15:26,243 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:15:26,247 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:26,277 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:15:26,277 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-10-14 01:15:26,278 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:15:26,278 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 33
[2020-10-14 01:15:26,279 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:15:26,280 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:15:26,280 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 01:15:26,281 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-14 01:15:26,281 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 13
[2020-10-14 01:15:26,281 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-10-14 01:15:27,696 INFO  L134       CoverageAnalysis]: Checked inductivity of 28 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-10-14 01:15:27,697 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024633066]
[2020-10-14 01:15:27,697 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-14 01:15:27,698 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-14 01:15:27,698 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688001110]
[2020-10-14 01:15:27,700 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-14 01:15:27,701 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 01:15:27,701 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-14 01:15:27,708 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-14 01:15:27,708 INFO  L87              Difference]: Start difference. First operand 16671 states and 26104 transitions. Second operand 7 states.
[2020-10-14 01:15:52,837 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 01:15:52,837 INFO  L93              Difference]: Finished difference Result 37530 states and 59838 transitions.
[2020-10-14 01:15:52,838 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-14 01:15:52,839 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1713
[2020-10-14 01:15:52,839 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 01:15:52,930 INFO  L225             Difference]: With dead ends: 37530
[2020-10-14 01:15:52,931 INFO  L226             Difference]: Without dead ends: 20865
[2020-10-14 01:15:52,974 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2020-10-14 01:15:52,998 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 20865 states.
[2020-10-14 01:15:53,395 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 20865 to 18930.
[2020-10-14 01:15:53,396 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 18930 states.
[2020-10-14 01:15:53,450 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 18930 states to 18930 states and 25876 transitions.
[2020-10-14 01:15:53,452 INFO  L78                 Accepts]: Start accepts. Automaton has 18930 states and 25876 transitions. Word has length 1713
[2020-10-14 01:15:53,453 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 01:15:53,453 INFO  L479      AbstractCegarLoop]: Abstraction has 18930 states and 25876 transitions.
[2020-10-14 01:15:53,453 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-14 01:15:53,453 INFO  L276                IsEmpty]: Start isEmpty. Operand 18930 states and 25876 transitions.
[2020-10-14 01:15:53,619 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1729
[2020-10-14 01:15:53,620 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 01:15:53,621 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, 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, 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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]
[2020-10-14 01:15:53,621 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-10-14 01:15:53,622 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 01:15:53,622 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 01:15:53,623 INFO  L82        PathProgramCache]: Analyzing trace with hash -1514093365, now seen corresponding path program 1 times
[2020-10-14 01:15:53,623 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 01:15:53,624 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328042537]
[2020-10-14 01:15:53,624 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 01:15:53,733 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:15:53,760 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:54,518 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:56,404 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:58,818 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:58,963 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:15:58,963 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1752
[2020-10-14 01:15:58,963 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 4
[2020-10-14 01:15:58,963 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5226
[2020-10-14 01:15:58,964 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:15:58,964 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:15:58,964 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-10-14 01:15:58,964 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 5
[2020-10-14 01:15:58,964 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 43
[2020-10-14 01:15:58,965 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-10-14 01:15:59,344 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 01:15:59,346 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:15:59,347 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:59,354 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:15:59,354 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 01:15:59,354 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:15:59,354 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-10-14 01:15:59,355 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:15:59,355 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:15:59,355 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 01:15:59,355 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 01:15:59,355 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-10-14 01:15:59,356 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:15:59,378 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 01:15:59,386 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:15:59,392 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:59,404 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:15:59,498 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:15:59,498 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 39
[2020-10-14 01:15:59,498 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-14 01:15:59,499 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 111
[2020-10-14 01:15:59,499 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:15:59,499 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:15:59,499 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 01:15:59,499 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-14 01:15:59,499 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 39
[2020-10-14 01:15:59,499 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:16:00,653 INFO  L134       CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-10-14 01:16:00,653 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328042537]
[2020-10-14 01:16:00,654 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-10-14 01:16:00,654 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-10-14 01:16:00,654 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667491031]
[2020-10-14 01:16:00,656 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-14 01:16:00,656 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 01:16:00,657 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-14 01:16:00,657 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-14 01:16:00,657 INFO  L87              Difference]: Start difference. First operand 18930 states and 25876 transitions. Second operand 7 states.
[2020-10-14 01:16:24,040 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 01:16:24,040 INFO  L93              Difference]: Finished difference Result 56024 states and 81670 transitions.
[2020-10-14 01:16:24,041 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. 
[2020-10-14 01:16:24,041 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1728
[2020-10-14 01:16:24,042 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 01:16:24,162 INFO  L225             Difference]: With dead ends: 56024
[2020-10-14 01:16:24,162 INFO  L226             Difference]: Without dead ends: 37100
[2020-10-14 01:16:24,200 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-10-14 01:16:24,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37100 states.
[2020-10-14 01:16:24,918 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37100 to 36506.
[2020-10-14 01:16:24,919 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 36506 states.
[2020-10-14 01:16:24,992 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 36506 states to 36506 states and 49553 transitions.
[2020-10-14 01:16:24,992 INFO  L78                 Accepts]: Start accepts. Automaton has 36506 states and 49553 transitions. Word has length 1728
[2020-10-14 01:16:24,993 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 01:16:24,993 INFO  L479      AbstractCegarLoop]: Abstraction has 36506 states and 49553 transitions.
[2020-10-14 01:16:24,993 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-14 01:16:24,993 INFO  L276                IsEmpty]: Start isEmpty. Operand 36506 states and 49553 transitions.
[2020-10-14 01:16:25,098 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1752
[2020-10-14 01:16:25,099 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 01:16:25,100 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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]
[2020-10-14 01:16:25,100 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-10-14 01:16:25,101 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 01:16:25,101 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 01:16:25,101 INFO  L82        PathProgramCache]: Analyzing trace with hash -1844334952, now seen corresponding path program 1 times
[2020-10-14 01:16:25,102 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 01:16:25,102 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775440228]
[2020-10-14 01:16:25,102 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 01:16:25,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:16:25,262 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:16:25,611 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:16:27,958 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:16:30,301 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:16:30,301 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1777
[2020-10-14 01:16:30,302 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-10-14 01:16:30,302 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5064
[2020-10-14 01:16:30,302 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:16:30,302 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:16:30,302 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 01:16:30,303 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 50
[2020-10-14 01:16:30,303 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 24
[2020-10-14 01:16:30,303 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:16:30,569 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 01:16:30,571 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:16:30,572 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:16:30,575 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:16:30,575 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 01:16:30,575 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:16:30,575 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-10-14 01:16:30,575 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:16:30,575 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:16:30,575 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 01:16:30,576 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 01:16:30,576 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 01:16:30,576 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:16:30,593 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 01:16:30,600 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:16:30,604 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:16:30,624 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:16:30,624 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 41
[2020-10-14 01:16:30,624 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:16:30,624 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 23
[2020-10-14 01:16:30,624 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:16:30,625 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:16:30,625 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 01:16:30,625 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 01:16:30,625 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 35
[2020-10-14 01:16:30,625 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:16:30,633 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48
[2020-10-14 01:16:30,637 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:16:30,639 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:16:30,656 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:16:30,656 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-10-14 01:16:30,657 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:16:30,657 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 18
[2020-10-14 01:16:30,657 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:16:30,657 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:16:30,657 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 01:16:30,658 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-14 01:16:30,658 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 22
[2020-10-14 01:16:30,658 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:16:31,778 INFO  L134       CoverageAnalysis]: Checked inductivity of 76 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-10-14 01:16:31,778 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775440228]
[2020-10-14 01:16:31,779 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-14 01:16:31,779 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-14 01:16:31,779 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696952563]
[2020-10-14 01:16:31,781 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-14 01:16:31,781 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 01:16:31,781 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-14 01:16:31,781 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-14 01:16:31,781 INFO  L87              Difference]: Start difference. First operand 36506 states and 49553 transitions. Second operand 7 states.
[2020-10-14 01:16:58,167 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 01:16:58,167 INFO  L93              Difference]: Finished difference Result 109569 states and 164238 transitions.
[2020-10-14 01:16:58,169 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. 
[2020-10-14 01:16:58,169 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1751
[2020-10-14 01:16:58,169 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 01:16:58,438 INFO  L225             Difference]: With dead ends: 109569
[2020-10-14 01:16:58,438 INFO  L226             Difference]: Without dead ends: 73069
[2020-10-14 01:16:58,525 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2020-10-14 01:16:58,603 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 73069 states.
[2020-10-14 01:17:00,039 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 73069 to 70653.
[2020-10-14 01:17:00,039 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 70653 states.
[2020-10-14 01:17:00,207 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 70653 states to 70653 states and 101767 transitions.
[2020-10-14 01:17:00,207 INFO  L78                 Accepts]: Start accepts. Automaton has 70653 states and 101767 transitions. Word has length 1751
[2020-10-14 01:17:00,208 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-10-14 01:17:00,208 INFO  L479      AbstractCegarLoop]: Abstraction has 70653 states and 101767 transitions.
[2020-10-14 01:17:00,208 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-10-14 01:17:00,208 INFO  L276                IsEmpty]: Start isEmpty. Operand 70653 states and 101767 transitions.
[2020-10-14 01:17:00,394 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 1753
[2020-10-14 01:17:00,394 INFO  L414         BasicCegarLoop]: Found error trace
[2020-10-14 01:17:00,396 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:17:00,396 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-10-14 01:17:00,396 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [calculate_output8Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-10-14 01:17:00,397 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-10-14 01:17:00,397 INFO  L82        PathProgramCache]: Analyzing trace with hash 1069890400, now seen corresponding path program 1 times
[2020-10-14 01:17:00,398 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-10-14 01:17:00,398 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719186717]
[2020-10-14 01:17:00,398 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-10-14 01:17:00,496 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:17:00,539 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:17:00,733 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:17:05,557 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:17:05,557 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 1778
[2020-10-14 01:17:05,558 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 2
[2020-10-14 01:17:05,558 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 5058
[2020-10-14 01:17:05,558 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:17:05,558 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:17:05,558 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 01:17:05,558 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 51
[2020-10-14 01:17:05,558 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 24
[2020-10-14 01:17:05,558 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:17:05,957 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-10-14 01:17:05,958 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:17:05,959 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:17:05,961 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:17:05,961 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 8
[2020-10-14 01:17:05,961 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:17:05,961 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 2
[2020-10-14 01:17:05,961 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:17:05,962 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:17:05,962 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-10-14 01:17:05,962 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 01:17:05,962 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-10-14 01:17:05,962 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:17:05,979 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2020-10-14 01:17:05,986 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:17:05,991 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:17:06,010 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:17:06,011 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 42
[2020-10-14 01:17:06,011 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:17:06,011 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 23
[2020-10-14 01:17:06,011 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:17:06,011 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:17:06,011 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-10-14 01:17:06,011 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 1
[2020-10-14 01:17:06,012 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 36
[2020-10-14 01:17:06,012 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:17:06,020 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49
[2020-10-14 01:17:06,023 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-10-14 01:17:06,025 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-10-14 01:17:06,041 FATAL L256   erpolLogProxyWrapper]: Timeout: 5000
[2020-10-14 01:17:06,041 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 22
[2020-10-14 01:17:06,041 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-10-14 01:17:06,041 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 17
[2020-10-14 01:17:06,041 FATAL L256   erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL
[2020-10-14 01:17:06,042 FATAL L256   erpolLogProxyWrapper]: Tolerance: 0.4
[2020-10-14 01:17:06,042 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-10-14 01:17:06,042 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 0
[2020-10-14 01:17:06,042 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 22
[2020-10-14 01:17:06,042 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-10-14 01:17:07,188 INFO  L134       CoverageAnalysis]: Checked inductivity of 77 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-10-14 01:17:07,188 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719186717]
[2020-10-14 01:17:07,188 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-10-14 01:17:07,189 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7
[2020-10-14 01:17:07,189 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644296212]
[2020-10-14 01:17:07,191 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-10-14 01:17:07,191 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-10-14 01:17:07,191 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-10-14 01:17:07,192 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-10-14 01:17:07,192 INFO  L87              Difference]: Start difference. First operand 70653 states and 101767 transitions. Second operand 7 states.
[2020-10-14 01:17:33,090 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-10-14 01:17:33,090 INFO  L93              Difference]: Finished difference Result 173532 states and 263574 transitions.
[2020-10-14 01:17:33,091 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-10-14 01:17:33,091 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 1752
[2020-10-14 01:17:33,092 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-10-14 01:17:33,542 INFO  L225             Difference]: With dead ends: 173532
[2020-10-14 01:17:33,542 INFO  L226             Difference]: Without dead ends: 102885
[2020-10-14 01:17:33,679 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132
[2020-10-14 01:17:33,787 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 102885 states.