/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_flag-1.i


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 18:42:07,651 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 18:42:07,654 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 18:42:07,696 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 18:42:07,697 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 18:42:07,706 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 18:42:07,707 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 18:42:07,711 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 18:42:07,714 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 18:42:07,718 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 18:42:07,719 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 18:42:07,720 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 18:42:07,720 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 18:42:07,723 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 18:42:07,725 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 18:42:07,726 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 18:42:07,728 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 18:42:07,729 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 18:42:07,731 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 18:42:07,739 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 18:42:07,741 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 18:42:07,742 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 18:42:07,743 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 18:42:07,743 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 18:42:07,755 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 18:42:07,758 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 18:42:07,758 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 18:42:07,759 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 18:42:07,759 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 18:42:07,760 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 18:42:07,760 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 18:42:07,763 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 18:42:07,764 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 18:42:07,765 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 18:42:07,766 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 18:42:07,766 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 18:42:07,767 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 18:42:07,767 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 18:42:07,767 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 18:42:07,768 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 18:42:07,768 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 18:42:07,769 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
[2020-08-18 18:42:07,806 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 18:42:07,806 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 18:42:07,808 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 18:42:07,809 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 18:42:07,809 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 18:42:07,809 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 18:42:07,809 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 18:42:07,810 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 18:42:07,810 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 18:42:07,810 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 18:42:07,811 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 18:42:07,811 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 18:42:07,812 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 18:42:07,812 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 18:42:07,813 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 18:42:07,813 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 18:42:07,813 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 18:42:07,814 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 18:42:07,814 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 18:42:07,814 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 18:42:07,814 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 18:42:07,815 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 18:42:07,815 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 18:42:07,815 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 18:42:07,815 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 18:42:07,815 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 18:42:07,816 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 18:42:07,816 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 18:42:07,816 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 18:42:07,816 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.traceabstraction: Use minimal unsat core enumeration -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER;
[2020-08-18 18:42:08,126 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 18:42:08,139 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 18:42:08,142 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 18:42:08,144 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 18:42:08,145 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 18:42:08,145 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i
[2020-08-18 18:42:08,219 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b28ef1a02/f53aacd5b2454c43a05ee9068a82fa8b/FLAG399c4c5d4
[2020-08-18 18:42:08,754 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 18:42:08,755 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_flag-1.i
[2020-08-18 18:42:08,774 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b28ef1a02/f53aacd5b2454c43a05ee9068a82fa8b/FLAG399c4c5d4
[2020-08-18 18:42:09,103 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b28ef1a02/f53aacd5b2454c43a05ee9068a82fa8b
[2020-08-18 18:42:09,114 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 18:42:09,116 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 18:42:09,117 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 18:42:09,117 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 18:42:09,121 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 18:42:09,122 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:09" (1/1) ...
[2020-08-18 18:42:09,126 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b1e91ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09, skipping insertion in model container
[2020-08-18 18:42:09,126 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:42:09" (1/1) ...
[2020-08-18 18:42:09,135 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 18:42:09,197 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 18:42:09,647 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 18:42:09,658 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 18:42:09,706 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 18:42:09,804 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 18:42:09,805 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09 WrapperNode
[2020-08-18 18:42:09,805 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 18:42:09,806 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 18:42:09,806 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 18:42:09,807 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 18:42:09,822 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09" (1/1) ...
[2020-08-18 18:42:09,824 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09" (1/1) ...
[2020-08-18 18:42:09,845 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09" (1/1) ...
[2020-08-18 18:42:09,845 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09" (1/1) ...
[2020-08-18 18:42:09,859 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09" (1/1) ...
[2020-08-18 18:42:09,865 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09" (1/1) ...
[2020-08-18 18:42:09,869 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09" (1/1) ...
[2020-08-18 18:42:09,875 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 18:42:09,876 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 18:42:09,876 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 18:42:09,876 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 18:42:09,877 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09" (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
[2020-08-18 18:42:09,939 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 18:42:09,939 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 18:42:09,939 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-08-18 18:42:09,939 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-08-18 18:42:09,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint16_identity
[2020-08-18 18:42:09,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint32_identity
[2020-08-18 18:42:09,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint64_identity
[2020-08-18 18:42:09,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure myexit
[2020-08-18 18:42:09,940 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 18:42:09,941 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 18:42:09,941 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-18 18:42:09,941 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-08-18 18:42:09,941 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-08-18 18:42:09,946 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-08-18 18:42:09,946 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-08-18 18:42:09,946 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-08-18 18:42:09,946 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-08-18 18:42:09,947 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-08-18 18:42:09,947 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-08-18 18:42:09,947 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-08-18 18:42:09,947 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-08-18 18:42:09,947 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-08-18 18:42:09,947 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-08-18 18:42:09,947 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-08-18 18:42:09,948 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-08-18 18:42:09,948 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-08-18 18:42:09,948 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-08-18 18:42:09,948 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-08-18 18:42:09,948 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-08-18 18:42:09,948 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint16_identity
[2020-08-18 18:42:09,948 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint32_identity
[2020-08-18 18:42:09,949 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint64_identity
[2020-08-18 18:42:09,952 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-08-18 18:42:09,952 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-08-18 18:42:09,952 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-08-18 18:42:09,952 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-08-18 18:42:09,952 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-08-18 18:42:09,952 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-08-18 18:42:09,953 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-08-18 18:42:09,953 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-08-18 18:42:09,953 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-08-18 18:42:09,953 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-08-18 18:42:09,953 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-08-18 18:42:09,953 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-08-18 18:42:09,954 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-08-18 18:42:09,955 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-08-18 18:42:09,955 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-08-18 18:42:09,955 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-08-18 18:42:09,955 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-08-18 18:42:09,956 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-08-18 18:42:09,956 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-08-18 18:42:09,956 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-08-18 18:42:09,956 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-08-18 18:42:09,956 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-08-18 18:42:09,956 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-08-18 18:42:09,957 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-08-18 18:42:09,957 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-08-18 18:42:09,957 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-08-18 18:42:09,957 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-08-18 18:42:09,957 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-08-18 18:42:09,957 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-08-18 18:42:09,958 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-08-18 18:42:09,958 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-08-18 18:42:09,958 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-08-18 18:42:09,958 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-08-18 18:42:09,958 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-08-18 18:42:09,958 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-08-18 18:42:09,958 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-08-18 18:42:09,960 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-08-18 18:42:09,961 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-08-18 18:42:09,961 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-08-18 18:42:09,961 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-08-18 18:42:09,961 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-08-18 18:42:09,961 INFO  L130     BoogieDeclarations]: Found specification of procedure aligned_alloc
[2020-08-18 18:42:09,962 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 18:42:09,962 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-08-18 18:42:09,962 INFO  L130     BoogieDeclarations]: Found specification of procedure at_quick_exit
[2020-08-18 18:42:09,962 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-08-18 18:42:09,962 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-08-18 18:42:09,962 INFO  L130     BoogieDeclarations]: Found specification of procedure quick_exit
[2020-08-18 18:42:09,962 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-08-18 18:42:09,963 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-08-18 18:42:09,963 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-08-18 18:42:09,963 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-08-18 18:42:09,963 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-08-18 18:42:09,963 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-08-18 18:42:09,963 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-08-18 18:42:09,964 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-08-18 18:42:09,964 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-08-18 18:42:09,964 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-08-18 18:42:09,964 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-08-18 18:42:09,964 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-08-18 18:42:09,964 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-08-18 18:42:09,964 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-08-18 18:42:09,964 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-08-18 18:42:09,964 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-08-18 18:42:09,965 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-08-18 18:42:09,965 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-08-18 18:42:09,965 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-08-18 18:42:09,965 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-08-18 18:42:09,965 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-08-18 18:42:09,965 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-08-18 18:42:09,965 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-08-18 18:42:09,965 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-08-18 18:42:09,965 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-08-18 18:42:09,966 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-08-18 18:42:09,967 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-08-18 18:42:09,967 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-08-18 18:42:09,967 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-08-18 18:42:09,967 INFO  L130     BoogieDeclarations]: Found specification of procedure myexit
[2020-08-18 18:42:09,967 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 18:42:09,967 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-08-18 18:42:09,968 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-08-18 18:42:09,968 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-08-18 18:42:09,968 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-08-18 18:42:09,968 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-08-18 18:42:09,968 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 18:42:09,968 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 18:42:09,968 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-08-18 18:42:10,313 INFO  L732   $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true;
[2020-08-18 18:42:10,512 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 18:42:10,512 INFO  L295             CfgBuilder]: Removed 3 assume(true) statements.
[2020-08-18 18:42:10,516 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:42:10 BoogieIcfgContainer
[2020-08-18 18:42:10,516 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 18:42:10,518 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 18:42:10,518 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 18:42:10,522 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 18:42:10,522 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:42:09" (1/3) ...
[2020-08-18 18:42:10,523 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4091d6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:42:10, skipping insertion in model container
[2020-08-18 18:42:10,523 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:42:09" (2/3) ...
[2020-08-18 18:42:10,523 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4091d6a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:42:10, skipping insertion in model container
[2020-08-18 18:42:10,524 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:42:10" (3/3) ...
[2020-08-18 18:42:10,526 INFO  L109   eAbstractionObserver]: Analyzing ICFG list_flag-1.i
[2020-08-18 18:42:10,536 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 18:42:10,544 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 18:42:10,558 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 18:42:10,582 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 18:42:10,582 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 18:42:10,582 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 18:42:10,583 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 18:42:10,583 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 18:42:10,583 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 18:42:10,583 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 18:42:10,583 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 18:42:10,602 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states.
[2020-08-18 18:42:10,608 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-08-18 18:42:10,609 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:42:10,610 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:42:10,610 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:42:10,615 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:42:10,615 INFO  L82        PathProgramCache]: Analyzing trace with hash 1184417696, now seen corresponding path program 1 times
[2020-08-18 18:42:10,622 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:42:10,623 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602556323]
[2020-08-18 18:42:10,623 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:42:10,734 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:10,807 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:42:10,811 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:10,822 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 18:42:10,823 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602556323]
[2020-08-18 18:42:10,826 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:42:10,826 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 18:42:10,827 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453409965]
[2020-08-18 18:42:10,833 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 18:42:10,833 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:42:10,848 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 18:42:10,850 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 18:42:10,852 INFO  L87              Difference]: Start difference. First operand 32 states. Second operand 3 states.
[2020-08-18 18:42:10,963 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:42:10,964 INFO  L93              Difference]: Finished difference Result 46 states and 61 transitions.
[2020-08-18 18:42:10,964 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 18:42:10,966 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 15
[2020-08-18 18:42:10,967 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:42:10,976 INFO  L225             Difference]: With dead ends: 46
[2020-08-18 18:42:10,976 INFO  L226             Difference]: Without dead ends: 24
[2020-08-18 18:42:10,980 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 18:42:11,002 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-08-18 18:42:11,049 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2020-08-18 18:42:11,051 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-08-18 18:42:11,052 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions.
[2020-08-18 18:42:11,054 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15
[2020-08-18 18:42:11,055 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:42:11,055 INFO  L479      AbstractCegarLoop]: Abstraction has 24 states and 28 transitions.
[2020-08-18 18:42:11,055 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 18:42:11,055 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions.
[2020-08-18 18:42:11,056 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-08-18 18:42:11,056 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:42:11,057 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:42:11,057 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 18:42:11,057 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:42:11,058 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:42:11,058 INFO  L82        PathProgramCache]: Analyzing trace with hash -218242506, now seen corresponding path program 1 times
[2020-08-18 18:42:11,058 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:42:11,059 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151511072]
[2020-08-18 18:42:11,059 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:42:11,096 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:11,219 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:42:11,221 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:11,227 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 18:42:11,228 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151511072]
[2020-08-18 18:42:11,228 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:42:11,228 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 18:42:11,229 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471147114]
[2020-08-18 18:42:11,231 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 18:42:11,231 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:42:11,231 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 18:42:11,232 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 18:42:11,232 INFO  L87              Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states.
[2020-08-18 18:42:11,376 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:42:11,377 INFO  L93              Difference]: Finished difference Result 48 states and 57 transitions.
[2020-08-18 18:42:11,377 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 18:42:11,377 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 17
[2020-08-18 18:42:11,378 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:42:11,379 INFO  L225             Difference]: With dead ends: 48
[2020-08-18 18:42:11,379 INFO  L226             Difference]: Without dead ends: 44
[2020-08-18 18:42:11,381 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-08-18 18:42:11,381 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-08-18 18:42:11,388 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32.
[2020-08-18 18:42:11,388 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-08-18 18:42:11,389 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions.
[2020-08-18 18:42:11,390 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17
[2020-08-18 18:42:11,390 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:42:11,390 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 38 transitions.
[2020-08-18 18:42:11,390 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 18:42:11,391 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions.
[2020-08-18 18:42:11,391 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-08-18 18:42:11,392 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:42:11,392 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:42:11,392 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 18:42:11,392 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:42:11,393 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:42:11,393 INFO  L82        PathProgramCache]: Analyzing trace with hash 771025649, now seen corresponding path program 1 times
[2020-08-18 18:42:11,393 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:42:11,394 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418041309]
[2020-08-18 18:42:11,394 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:42:11,423 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:11,516 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:42:11,518 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:11,528 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 18:42:11,529 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418041309]
[2020-08-18 18:42:11,529 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:42:11,529 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 18:42:11,529 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700359776]
[2020-08-18 18:42:11,530 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 18:42:11,530 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:42:11,530 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 18:42:11,530 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 18:42:11,531 INFO  L87              Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states.
[2020-08-18 18:42:11,683 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:42:11,683 INFO  L93              Difference]: Finished difference Result 50 states and 58 transitions.
[2020-08-18 18:42:11,683 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 18:42:11,684 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 19
[2020-08-18 18:42:11,684 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:42:11,687 INFO  L225             Difference]: With dead ends: 50
[2020-08-18 18:42:11,687 INFO  L226             Difference]: Without dead ends: 42
[2020-08-18 18:42:11,688 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-08-18 18:42:11,689 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-08-18 18:42:11,698 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30.
[2020-08-18 18:42:11,698 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-08-18 18:42:11,701 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions.
[2020-08-18 18:42:11,701 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19
[2020-08-18 18:42:11,702 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:42:11,702 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 35 transitions.
[2020-08-18 18:42:11,702 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 18:42:11,702 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions.
[2020-08-18 18:42:11,712 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-08-18 18:42:11,712 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:42:11,712 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:42:11,713 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 18:42:11,713 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:42:11,713 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:42:11,714 INFO  L82        PathProgramCache]: Analyzing trace with hash -472715872, now seen corresponding path program 1 times
[2020-08-18 18:42:11,714 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:42:11,714 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889720828]
[2020-08-18 18:42:11,714 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:42:11,751 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:11,850 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:42:11,852 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:11,867 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 18:42:11,867 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889720828]
[2020-08-18 18:42:11,868 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:42:11,868 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 18:42:11,868 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771462650]
[2020-08-18 18:42:11,869 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 18:42:11,869 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:42:11,869 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 18:42:11,869 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 18:42:11,870 INFO  L87              Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states.
[2020-08-18 18:42:11,999 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:42:12,000 INFO  L93              Difference]: Finished difference Result 48 states and 55 transitions.
[2020-08-18 18:42:12,000 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 18:42:12,001 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 19
[2020-08-18 18:42:12,001 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:42:12,002 INFO  L225             Difference]: With dead ends: 48
[2020-08-18 18:42:12,002 INFO  L226             Difference]: Without dead ends: 38
[2020-08-18 18:42:12,003 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-08-18 18:42:12,005 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-08-18 18:42:12,010 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26.
[2020-08-18 18:42:12,012 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-08-18 18:42:12,013 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions.
[2020-08-18 18:42:12,013 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19
[2020-08-18 18:42:12,013 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:42:12,014 INFO  L479      AbstractCegarLoop]: Abstraction has 26 states and 30 transitions.
[2020-08-18 18:42:12,014 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 18:42:12,014 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions.
[2020-08-18 18:42:12,015 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-08-18 18:42:12,016 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:42:12,016 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:42:12,016 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 18:42:12,016 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:42:12,017 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:42:12,017 INFO  L82        PathProgramCache]: Analyzing trace with hash -1962636917, now seen corresponding path program 1 times
[2020-08-18 18:42:12,017 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:42:12,017 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988342984]
[2020-08-18 18:42:12,018 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:42:12,058 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:12,121 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 18:42:12,124 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 18:42:12,128 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 18:42:12,128 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988342984]
[2020-08-18 18:42:12,129 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 18:42:12,129 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 18:42:12,129 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106855333]
[2020-08-18 18:42:12,130 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 18:42:12,130 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 18:42:12,130 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 18:42:12,131 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 18:42:12,131 INFO  L87              Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states.
[2020-08-18 18:42:12,194 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 18:42:12,195 INFO  L93              Difference]: Finished difference Result 54 states and 64 transitions.
[2020-08-18 18:42:12,195 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 18:42:12,195 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 23
[2020-08-18 18:42:12,196 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 18:42:12,197 INFO  L225             Difference]: With dead ends: 54
[2020-08-18 18:42:12,197 INFO  L226             Difference]: Without dead ends: 38
[2020-08-18 18:42:12,198 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 18:42:12,199 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-08-18 18:42:12,203 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34.
[2020-08-18 18:42:12,203 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-08-18 18:42:12,204 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions.
[2020-08-18 18:42:12,204 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23
[2020-08-18 18:42:12,204 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 18:42:12,205 INFO  L479      AbstractCegarLoop]: Abstraction has 34 states and 39 transitions.
[2020-08-18 18:42:12,205 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 18:42:12,205 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions.
[2020-08-18 18:42:12,206 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-08-18 18:42:12,206 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 18:42:12,206 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 18:42:12,206 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 18:42:12,206 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 18:42:12,207 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 18:42:12,207 INFO  L82        PathProgramCache]: Analyzing trace with hash 1888593434, now seen corresponding path program 1 times
[2020-08-18 18:42:12,207 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 18:42:12,208 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265942526]
[2020-08-18 18:42:12,208 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 18:42:12,229 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-18 18:42:12,231 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-18 18:42:12,231 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-18 18:42:12,235 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 18:42:12,253 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:42:12 BoogieIcfgContainer
[2020-08-18 18:42:12,253 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-18 18:42:12,256 INFO  L168              Benchmark]: Toolchain (without parser) took 3139.56 ms. Allocated memory was 141.6 MB in the beginning and 235.9 MB in the end (delta: 94.4 MB). Free memory was 103.0 MB in the beginning and 107.3 MB in the end (delta: -4.3 MB). Peak memory consumption was 90.1 MB. Max. memory is 7.1 GB.
[2020-08-18 18:42:12,257 INFO  L168              Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-08-18 18:42:12,259 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 688.66 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 102.8 MB in the beginning and 170.2 MB in the end (delta: -67.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB.
[2020-08-18 18:42:12,259 INFO  L168              Benchmark]: Boogie Preprocessor took 69.31 ms. Allocated memory is still 204.5 MB. Free memory was 170.2 MB in the beginning and 167.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB.
[2020-08-18 18:42:12,260 INFO  L168              Benchmark]: RCFGBuilder took 640.75 ms. Allocated memory is still 204.5 MB. Free memory was 167.6 MB in the beginning and 123.4 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB.
[2020-08-18 18:42:12,262 INFO  L168              Benchmark]: TraceAbstraction took 1735.60 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 123.4 MB in the beginning and 107.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB.
[2020-08-18 18:42:12,266 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.21 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 688.66 ms. Allocated memory was 141.6 MB in the beginning and 204.5 MB in the end (delta: 62.9 MB). Free memory was 102.8 MB in the beginning and 170.2 MB in the end (delta: -67.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 69.31 ms. Allocated memory is still 204.5 MB. Free memory was 170.2 MB in the beginning and 167.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 640.75 ms. Allocated memory is still 204.5 MB. Free memory was 167.6 MB in the beginning and 123.4 MB in the end (delta: 44.2 MB). Peak memory consumption was 44.2 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1735.60 ms. Allocated memory was 204.5 MB in the beginning and 235.9 MB in the end (delta: 31.5 MB). Free memory was 123.4 MB in the beginning and 107.3 MB in the end (delta: 16.1 MB). Peak memory consumption was 47.6 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L521]              int flag = __VERIFIER_nondet_int();
[L522]              List p, a, t;
[L523]              a = (List) malloc(sizeof(struct node))
[L524]  COND FALSE  !(a == 0)
[L525]              p = a
[L526]  COND TRUE   __VERIFIER_nondet_int()
[L527]  COND TRUE   \read(flag)
[L528]              p->h = 1
[L532]              t = (List) malloc(sizeof(struct node))
[L533]  COND FALSE  !(t == 0)
[L534]              p->n = t
[L535]  EXPR        p->n
[L535]              p = p->n
[L526]  COND FALSE  !(__VERIFIER_nondet_int())
[L537]              p->h = 3
[L538]              p = a
[L539]  COND TRUE   \read(flag)
[L540]  EXPR        p->h
[L540]  COND FALSE  !(p->h == 2)
[L545]  EXPR        p->h
[L545]  COND TRUE   p->h != 3
[L546]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 73 SDslu, 178 SDs, 0 SdLazy, 288 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 4694 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...