/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 17:19:12,861 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 17:19:12,865 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 17:19:12,890 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 17:19:12,891 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 17:19:12,892 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 17:19:12,893 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 17:19:12,895 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 17:19:12,896 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 17:19:12,897 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 17:19:12,898 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 17:19:12,899 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 17:19:12,899 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 17:19:12,900 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 17:19:12,901 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 17:19:12,903 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 17:19:12,904 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 17:19:12,905 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 17:19:12,906 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 17:19:12,908 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 17:19:12,910 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 17:19:12,911 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 17:19:12,912 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 17:19:12,913 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 17:19:12,915 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 17:19:12,915 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 17:19:12,916 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 17:19:12,916 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 17:19:12,917 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 17:19:12,918 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 17:19:12,918 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 17:19:12,919 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 17:19:12,920 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 17:19:12,921 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 17:19:12,922 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 17:19:12,922 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 17:19:12,923 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 17:19:12,923 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 17:19:12,923 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 17:19:12,924 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 17:19:12,926 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 17:19:12,927 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-09-24 17:19:12,983 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 17:19:12,983 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 17:19:12,987 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 17:19:12,987 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 17:19:12,987 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 17:19:12,988 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 17:19:12,988 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 17:19:12,989 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 17:19:12,989 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 17:19:12,989 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 17:19:12,989 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 17:19:12,989 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 17:19:12,990 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 17:19:12,990 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 17:19:12,990 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 17:19:12,990 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 17:19:12,990 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 17:19:12,992 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 17:19:12,992 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 17:19:12,992 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 17:19:12,992 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 17:19:12,993 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:19:12,993 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 17:19:12,993 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 17:19:12,993 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 17:19:12,993 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 17:19:12,994 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 17:19:12,994 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 17:19:12,994 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 17:19:12,994 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;log-additional-information=true;
[2020-09-24 17:19:13,495 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 17:19:13,513 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 17:19:13,517 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 17:19:13,519 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 17:19:13,520 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 17:19:13,521 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i
[2020-09-24 17:19:13,598 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5fa7c76e/66946e6569ce40a38ffa65d757b8ef93/FLAG8853ce9f6
[2020-09-24 17:19:14,182 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 17:19:14,183 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i
[2020-09-24 17:19:14,190 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5fa7c76e/66946e6569ce40a38ffa65d757b8ef93/FLAG8853ce9f6
[2020-09-24 17:19:14,491 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a5fa7c76e/66946e6569ce40a38ffa65d757b8ef93
[2020-09-24 17:19:14,509 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 17:19:14,516 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 17:19:14,518 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 17:19:14,518 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 17:19:14,523 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 17:19:14,524 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:19:14" (1/1) ...
[2020-09-24 17:19:14,529 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e85302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14, skipping insertion in model container
[2020-09-24 17:19:14,529 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 05:19:14" (1/1) ...
[2020-09-24 17:19:14,540 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 17:19:14,573 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 17:19:14,803 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:19:14,815 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 17:19:14,845 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 17:19:14,865 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 17:19:14,866 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14 WrapperNode
[2020-09-24 17:19:14,866 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 17:19:14,867 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 17:19:14,867 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 17:19:14,867 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 17:19:14,966 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14" (1/1) ...
[2020-09-24 17:19:14,966 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14" (1/1) ...
[2020-09-24 17:19:14,978 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14" (1/1) ...
[2020-09-24 17:19:14,978 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14" (1/1) ...
[2020-09-24 17:19:15,000 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14" (1/1) ...
[2020-09-24 17:19:15,013 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14" (1/1) ...
[2020-09-24 17:19:15,015 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14" (1/1) ...
[2020-09-24 17:19:15,019 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 17:19:15,019 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 17:19:15,019 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 17:19:15,020 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 17:19:15,021 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 17:19:15,096 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 17:19:15,096 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 17:19:15,099 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-24 17:19:15,100 INFO  L138     BoogieDeclarations]: Found implementation of procedure insert
[2020-09-24 17:19:15,100 INFO  L138     BoogieDeclarations]: Found implementation of procedure elem_exists
[2020-09-24 17:19:15,100 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 17:19:15,100 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 17:19:15,101 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-24 17:19:15,101 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-09-24 17:19:15,102 INFO  L130     BoogieDeclarations]: Found specification of procedure insert
[2020-09-24 17:19:15,102 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-09-24 17:19:15,103 INFO  L130     BoogieDeclarations]: Found specification of procedure elem_exists
[2020-09-24 17:19:15,103 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-09-24 17:19:15,103 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 17:19:15,104 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-24 17:19:15,105 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-24 17:19:15,105 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 17:19:15,105 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 17:19:15,563 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 17:19:15,563 INFO  L295             CfgBuilder]: Removed 10 assume(true) statements.
[2020-09-24 17:19:15,570 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:19:15 BoogieIcfgContainer
[2020-09-24 17:19:15,570 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 17:19:15,572 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 17:19:15,572 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 17:19:15,576 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 17:19:15,576 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 05:19:14" (1/3) ...
[2020-09-24 17:19:15,577 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cbe9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:19:15, skipping insertion in model container
[2020-09-24 17:19:15,577 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 05:19:14" (2/3) ...
[2020-09-24 17:19:15,578 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26cbe9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 05:19:15, skipping insertion in model container
[2020-09-24 17:19:15,578 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 05:19:15" (3/3) ...
[2020-09-24 17:19:15,580 INFO  L109   eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i
[2020-09-24 17:19:15,590 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 17:19:15,602 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 17:19:15,623 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 17:19:15,652 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 17:19:15,653 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 17:19:15,653 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 17:19:15,653 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 17:19:15,653 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 17:19:15,653 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 17:19:15,653 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 17:19:15,653 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 17:19:15,681 INFO  L276                IsEmpty]: Start isEmpty. Operand 132 states.
[2020-09-24 17:19:15,688 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-09-24 17:19:15,688 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:15,689 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]
[2020-09-24 17:19:15,690 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:15,696 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:15,697 INFO  L82        PathProgramCache]: Analyzing trace with hash 1588916751, now seen corresponding path program 1 times
[2020-09-24 17:19:15,706 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:15,706 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188838690]
[2020-09-24 17:19:15,707 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:15,844 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:15,874 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:15,926 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:16,041 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:16,415 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:16,415 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 32
[2020-09-24 17:19:16,415 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 3
[2020-09-24 17:19:16,416 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 565
[2020-09-24 17:19:16,417 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:16,418 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 4
[2020-09-24 17:19:16,418 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 14
[2020-09-24 17:19:16,418 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-09-24 17:19:16,419 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:19:16,510 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:19:16,512 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:16,515 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:16,523 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:16,523 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:19:16,523 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:16,524 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 9
[2020-09-24 17:19:16,524 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:16,524 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:16,524 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:16,524 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:16,525 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:19:16,536 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:19:16,537 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188838690]
[2020-09-24 17:19:16,539 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:19:16,540 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-09-24 17:19:16,541 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473008831]
[2020-09-24 17:19:16,547 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-09-24 17:19:16,548 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:19:16,566 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-09-24 17:19:16,567 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-09-24 17:19:16,570 INFO  L87              Difference]: Start difference. First operand 132 states. Second operand 6 states.
[2020-09-24 17:19:17,158 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:19:17,159 INFO  L93              Difference]: Finished difference Result 266 states and 324 transitions.
[2020-09-24 17:19:17,159 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 17:19:17,161 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 23
[2020-09-24 17:19:17,162 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:19:17,180 INFO  L225             Difference]: With dead ends: 266
[2020-09-24 17:19:17,180 INFO  L226             Difference]: Without dead ends: 135
[2020-09-24 17:19:17,187 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56
[2020-09-24 17:19:17,206 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 135 states.
[2020-09-24 17:19:17,245 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 122.
[2020-09-24 17:19:17,247 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 122 states.
[2020-09-24 17:19:17,249 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 134 transitions.
[2020-09-24 17:19:17,251 INFO  L78                 Accepts]: Start accepts. Automaton has 122 states and 134 transitions. Word has length 23
[2020-09-24 17:19:17,252 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:19:17,252 INFO  L479      AbstractCegarLoop]: Abstraction has 122 states and 134 transitions.
[2020-09-24 17:19:17,252 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-09-24 17:19:17,253 INFO  L276                IsEmpty]: Start isEmpty. Operand 122 states and 134 transitions.
[2020-09-24 17:19:17,257 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 60
[2020-09-24 17:19:17,257 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:17,257 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]
[2020-09-24 17:19:17,258 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 17:19:17,258 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:17,258 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:17,259 INFO  L82        PathProgramCache]: Analyzing trace with hash 23578911, now seen corresponding path program 1 times
[2020-09-24 17:19:17,259 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:17,259 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741759537]
[2020-09-24 17:19:17,259 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:17,277 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:17,288 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:17,322 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:17,355 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:17,532 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:17,611 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:17,658 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:25,797 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:25,797 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 72
[2020-09-24 17:19:25,797 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 6
[2020-09-24 17:19:25,798 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 8519
[2020-09-24 17:19:25,798 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:25,798 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 12
[2020-09-24 17:19:25,798 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 30
[2020-09-24 17:19:25,802 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 34
[2020-09-24 17:19:25,802 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 4
[2020-09-24 17:19:25,887 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:19:25,891 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:25,895 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:25,899 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:25,900 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:19:25,900 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:25,900 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 7
[2020-09-24 17:19:25,900 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:25,900 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:25,902 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:25,903 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:25,903 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 2
[2020-09-24 17:19:25,908 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2020-09-24 17:19:25,913 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:25,918 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:25,958 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:25,958 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 15
[2020-09-24 17:19:25,958 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:25,959 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 44
[2020-09-24 17:19:25,959 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:25,960 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 5
[2020-09-24 17:19:25,960 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:25,960 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 12
[2020-09-24 17:19:25,960 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:26,017 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-09-24 17:19:26,021 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:26,025 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:26,057 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:26,058 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-09-24 17:19:26,058 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:26,058 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 35
[2020-09-24 17:19:26,058 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:26,059 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 6
[2020-09-24 17:19:26,059 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:26,059 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 10
[2020-09-24 17:19:26,060 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 1
[2020-09-24 17:19:26,109 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 17:19:26,110 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741759537]
[2020-09-24 17:19:26,110 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:19:26,110 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14
[2020-09-24 17:19:26,111 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576602277]
[2020-09-24 17:19:26,113 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-09-24 17:19:26,117 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:19:26,117 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-09-24 17:19:26,118 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182
[2020-09-24 17:19:26,118 INFO  L87              Difference]: Start difference. First operand 122 states and 134 transitions. Second operand 14 states.
[2020-09-24 17:19:27,614 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:19:27,615 INFO  L93              Difference]: Finished difference Result 444 states and 522 transitions.
[2020-09-24 17:19:27,615 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. 
[2020-09-24 17:19:27,615 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states. Word has length 59
[2020-09-24 17:19:27,616 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:19:27,626 INFO  L225             Difference]: With dead ends: 444
[2020-09-24 17:19:27,627 INFO  L226             Difference]: Without dead ends: 366
[2020-09-24 17:19:27,629 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260
[2020-09-24 17:19:27,630 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 366 states.
[2020-09-24 17:19:27,691 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 212.
[2020-09-24 17:19:27,692 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 212 states.
[2020-09-24 17:19:27,696 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions.
[2020-09-24 17:19:27,696 INFO  L78                 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 59
[2020-09-24 17:19:27,696 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:19:27,702 INFO  L479      AbstractCegarLoop]: Abstraction has 212 states and 245 transitions.
[2020-09-24 17:19:27,702 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-09-24 17:19:27,702 INFO  L276                IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions.
[2020-09-24 17:19:27,704 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 66
[2020-09-24 17:19:27,704 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:27,705 INFO  L422         BasicCegarLoop]: trace histogram [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]
[2020-09-24 17:19:27,705 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 17:19:27,705 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:27,706 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:27,706 INFO  L82        PathProgramCache]: Analyzing trace with hash -1272166002, now seen corresponding path program 1 times
[2020-09-24 17:19:27,706 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:27,706 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785750257]
[2020-09-24 17:19:27,707 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:27,718 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:27,727 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:27,743 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:27,763 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:27,881 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:27,963 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:28,005 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:28,747 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:28,855 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:28,976 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:29,002 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:29,389 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:53,079 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:53,079 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 78
[2020-09-24 17:19:53,079 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 11
[2020-09-24 17:19:53,080 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 25359
[2020-09-24 17:19:53,080 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:53,080 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 2
[2020-09-24 17:19:53,080 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 24
[2020-09-24 17:19:53,080 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 2
[2020-09-24 17:19:53,081 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:19:53,104 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 17:19:53,106 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:53,108 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:53,112 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:53,112 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 11
[2020-09-24 17:19:53,112 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:53,113 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 4
[2020-09-24 17:19:53,113 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:53,113 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:53,113 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 2
[2020-09-24 17:19:53,113 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:53,114 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:19:53,115 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22
[2020-09-24 17:19:53,117 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:53,119 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:53,120 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:53,121 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 15
[2020-09-24 17:19:53,121 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:53,121 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 3
[2020-09-24 17:19:53,121 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:53,121 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:53,122 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 12
[2020-09-24 17:19:53,122 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:53,122 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:19:53,137 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37
[2020-09-24 17:19:53,139 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:53,142 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:53,147 FATAL L256   erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set)
[2020-09-24 17:19:53,147 FATAL L256   erpolLogProxyWrapper]: Cardinality of Constraint set: 13
[2020-09-24 17:19:53,147 FATAL L256   erpolLogProxyWrapper]: Number of enumerated Muses: 1
[2020-09-24 17:19:53,147 FATAL L256   erpolLogProxyWrapper]: Time needed for enumeration: 6
[2020-09-24 17:19:53,147 FATAL L256   erpolLogProxyWrapper]: Heuristic: RANDOM
[2020-09-24 17:19:53,148 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has size: 1
[2020-09-24 17:19:53,148 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has depth: 10
[2020-09-24 17:19:53,148 FATAL L256   erpolLogProxyWrapper]: Chosen Mus has width: 1
[2020-09-24 17:19:53,148 FATAL L256   erpolLogProxyWrapper]: Time needed for Heuristics: 0
[2020-09-24 17:19:53,155 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2020-09-24 17:19:53,155 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785750257]
[2020-09-24 17:19:53,156 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 17:19:53,156 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-09-24 17:19:53,156 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246033684]
[2020-09-24 17:19:53,157 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-09-24 17:19:53,157 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 17:19:53,157 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-09-24 17:19:53,157 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-09-24 17:19:53,158 INFO  L87              Difference]: Start difference. First operand 212 states and 245 transitions. Second operand 5 states.
[2020-09-24 17:19:53,488 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 17:19:53,488 INFO  L93              Difference]: Finished difference Result 449 states and 524 transitions.
[2020-09-24 17:19:53,493 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-09-24 17:19:53,493 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 65
[2020-09-24 17:19:53,493 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 17:19:53,495 INFO  L225             Difference]: With dead ends: 449
[2020-09-24 17:19:53,496 INFO  L226             Difference]: Without dead ends: 268
[2020-09-24 17:19:53,498 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42
[2020-09-24 17:19:53,498 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 268 states.
[2020-09-24 17:19:53,514 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 213.
[2020-09-24 17:19:53,515 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 213 states.
[2020-09-24 17:19:53,516 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 246 transitions.
[2020-09-24 17:19:53,517 INFO  L78                 Accepts]: Start accepts. Automaton has 213 states and 246 transitions. Word has length 65
[2020-09-24 17:19:53,517 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 17:19:53,517 INFO  L479      AbstractCegarLoop]: Abstraction has 213 states and 246 transitions.
[2020-09-24 17:19:53,517 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-09-24 17:19:53,517 INFO  L276                IsEmpty]: Start isEmpty. Operand 213 states and 246 transitions.
[2020-09-24 17:19:53,520 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 73
[2020-09-24 17:19:53,520 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 17:19:53,520 INFO  L422         BasicCegarLoop]: trace histogram [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]
[2020-09-24 17:19:53,521 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-09-24 17:19:53,521 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 17:19:53,521 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 17:19:53,521 INFO  L82        PathProgramCache]: Analyzing trace with hash -1045752708, now seen corresponding path program 1 times
[2020-09-24 17:19:53,521 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 17:19:53,522 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [48137307]
[2020-09-24 17:19:53,522 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 17:19:53,530 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 17:19:53,537 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:53,551 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:53,567 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:53,768 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:53,810 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:53,918 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:54,638 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:54,809 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:54,944 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:54,967 FATAL L256   erpolLogProxyWrapper]: Now shrinking...
[2020-09-24 17:19:55,262 FATAL L256   erpolLogProxyWrapper]: Now shrinking...