/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=DEEPEST -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 21:07:08,639 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 21:07:08,642 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 21:07:08,684 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 21:07:08,684 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 21:07:08,688 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 21:07:08,690 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 21:07:08,691 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 21:07:08,696 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 21:07:08,697 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 21:07:08,698 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 21:07:08,702 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 21:07:08,703 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 21:07:08,704 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 21:07:08,707 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 21:07:08,709 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 21:07:08,709 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 21:07:08,710 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 21:07:08,715 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 21:07:08,718 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 21:07:08,719 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 21:07:08,722 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 21:07:08,724 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 21:07:08,724 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 21:07:08,729 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 21:07:08,729 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 21:07:08,729 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 21:07:08,733 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 21:07:08,734 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 21:07:08,736 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 21:07:08,736 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 21:07:08,737 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 21:07:08,738 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 21:07:08,738 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 21:07:08,740 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 21:07:08,740 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 21:07:08,740 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 21:07:08,741 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 21:07:08,741 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 21:07:08,742 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 21:07:08,743 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 21:07:08,744 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 21:07:08,784 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 21:07:08,784 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 21:07:08,786 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 21:07:08,786 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 21:07:08,787 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 21:07:08,787 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 21:07:08,787 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 21:07:08,788 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 21:07:08,788 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 21:07:08,788 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 21:07:08,789 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 21:07:08,789 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 21:07:08,789 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 21:07:08,790 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 21:07:08,790 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 21:07:08,790 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 21:07:08,791 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 21:07:08,791 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 21:07:08,791 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 21:07:08,791 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 21:07:08,792 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 21:07:08,792 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 21:07:08,792 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 21:07:08,792 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 21:07:08,792 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 21:07:08,793 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 21:07:08,793 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 21:07:08,793 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 21:07:08,793 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 21:07:08,793 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=DEEPEST;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST;
[2020-08-18 21:07:09,096 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 21:07:09,108 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 21:07:09,112 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 21:07:09,113 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 21:07:09,114 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 21:07:09,114 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i
[2020-08-18 21:07:09,175 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cfbe0a56/63cb2b664d6a411aa00b714c306b4ce9/FLAGe61221c92
[2020-08-18 21:07:09,684 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 21:07:09,685 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_flag-1.i
[2020-08-18 21:07:09,698 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cfbe0a56/63cb2b664d6a411aa00b714c306b4ce9/FLAGe61221c92
[2020-08-18 21:07:09,985 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cfbe0a56/63cb2b664d6a411aa00b714c306b4ce9
[2020-08-18 21:07:09,995 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 21:07:09,997 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 21:07:09,998 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 21:07:09,998 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 21:07:10,002 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 21:07:10,003 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:09" (1/1) ...
[2020-08-18 21:07:10,006 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61c04ad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10, skipping insertion in model container
[2020-08-18 21:07:10,006 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:07:09" (1/1) ...
[2020-08-18 21:07:10,014 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 21:07:10,052 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 21:07:10,448 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 21:07:10,461 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 21:07:10,538 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 21:07:10,600 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 21:07:10,602 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10 WrapperNode
[2020-08-18 21:07:10,602 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 21:07:10,603 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 21:07:10,603 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 21:07:10,603 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 21:07:10,612 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10" (1/1) ...
[2020-08-18 21:07:10,613 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10" (1/1) ...
[2020-08-18 21:07:10,628 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10" (1/1) ...
[2020-08-18 21:07:10,629 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10" (1/1) ...
[2020-08-18 21:07:10,645 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10" (1/1) ...
[2020-08-18 21:07:10,650 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10" (1/1) ...
[2020-08-18 21:07:10,653 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10" (1/1) ...
[2020-08-18 21:07:10,659 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 21:07:10,660 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 21:07:10,660 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 21:07:10,660 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 21:07:10,661 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10" (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 21:07:10,744 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 21:07:10,744 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 21:07:10,745 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-08-18 21:07:10,746 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-08-18 21:07:10,746 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint16_identity
[2020-08-18 21:07:10,746 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint32_identity
[2020-08-18 21:07:10,747 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint64_identity
[2020-08-18 21:07:10,747 INFO  L138     BoogieDeclarations]: Found implementation of procedure myexit
[2020-08-18 21:07:10,747 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 21:07:10,747 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 21:07:10,748 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-18 21:07:10,749 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-08-18 21:07:10,749 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-08-18 21:07:10,749 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-08-18 21:07:10,749 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-08-18 21:07:10,750 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-08-18 21:07:10,750 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-08-18 21:07:10,750 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-08-18 21:07:10,750 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-08-18 21:07:10,750 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-08-18 21:07:10,751 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-08-18 21:07:10,751 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-08-18 21:07:10,751 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-08-18 21:07:10,751 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-08-18 21:07:10,751 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-08-18 21:07:10,752 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-08-18 21:07:10,752 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-08-18 21:07:10,753 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-08-18 21:07:10,753 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-08-18 21:07:10,753 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint16_identity
[2020-08-18 21:07:10,753 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint32_identity
[2020-08-18 21:07:10,753 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint64_identity
[2020-08-18 21:07:10,753 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-08-18 21:07:10,754 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-08-18 21:07:10,754 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-08-18 21:07:10,754 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-08-18 21:07:10,754 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-08-18 21:07:10,754 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-08-18 21:07:10,754 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-08-18 21:07:10,754 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-08-18 21:07:10,755 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-08-18 21:07:10,755 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-08-18 21:07:10,755 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-08-18 21:07:10,755 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-08-18 21:07:10,755 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-08-18 21:07:10,758 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-08-18 21:07:10,758 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-08-18 21:07:10,758 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-08-18 21:07:10,758 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-08-18 21:07:10,758 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-08-18 21:07:10,758 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-08-18 21:07:10,759 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-08-18 21:07:10,759 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-08-18 21:07:10,759 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-08-18 21:07:10,759 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-08-18 21:07:10,760 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-08-18 21:07:10,760 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-08-18 21:07:10,760 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-08-18 21:07:10,760 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-08-18 21:07:10,760 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-08-18 21:07:10,760 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-08-18 21:07:10,761 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-08-18 21:07:10,761 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-08-18 21:07:10,761 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-08-18 21:07:10,761 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-08-18 21:07:10,761 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-08-18 21:07:10,761 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-08-18 21:07:10,762 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-08-18 21:07:10,763 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-08-18 21:07:10,763 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-08-18 21:07:10,763 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-08-18 21:07:10,763 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-08-18 21:07:10,764 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-08-18 21:07:10,764 INFO  L130     BoogieDeclarations]: Found specification of procedure aligned_alloc
[2020-08-18 21:07:10,765 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 21:07:10,765 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-08-18 21:07:10,765 INFO  L130     BoogieDeclarations]: Found specification of procedure at_quick_exit
[2020-08-18 21:07:10,766 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-08-18 21:07:10,766 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-08-18 21:07:10,766 INFO  L130     BoogieDeclarations]: Found specification of procedure quick_exit
[2020-08-18 21:07:10,766 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-08-18 21:07:10,766 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-08-18 21:07:10,767 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-08-18 21:07:10,767 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-08-18 21:07:10,767 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-08-18 21:07:10,767 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-08-18 21:07:10,767 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-08-18 21:07:10,768 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-08-18 21:07:10,768 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-08-18 21:07:10,768 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-08-18 21:07:10,769 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-08-18 21:07:10,769 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-08-18 21:07:10,769 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-08-18 21:07:10,769 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-08-18 21:07:10,769 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-08-18 21:07:10,769 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-08-18 21:07:10,769 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-08-18 21:07:10,770 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-08-18 21:07:10,770 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-08-18 21:07:10,770 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-08-18 21:07:10,770 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-08-18 21:07:10,770 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-08-18 21:07:10,770 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-08-18 21:07:10,770 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-08-18 21:07:10,770 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-08-18 21:07:10,771 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-08-18 21:07:10,771 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-08-18 21:07:10,771 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-08-18 21:07:10,771 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-08-18 21:07:10,771 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-08-18 21:07:10,771 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-08-18 21:07:10,771 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-08-18 21:07:10,772 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-08-18 21:07:10,772 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-08-18 21:07:10,772 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-08-18 21:07:10,772 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-08-18 21:07:10,772 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-08-18 21:07:10,773 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-08-18 21:07:10,773 INFO  L130     BoogieDeclarations]: Found specification of procedure myexit
[2020-08-18 21:07:10,774 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 21:07:10,774 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-08-18 21:07:10,774 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-08-18 21:07:10,775 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-08-18 21:07:10,775 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-08-18 21:07:10,775 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-08-18 21:07:10,775 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 21:07:10,775 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 21:07:10,775 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-08-18 21:07:11,137 INFO  L732   $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true;
[2020-08-18 21:07:11,290 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 21:07:11,290 INFO  L295             CfgBuilder]: Removed 3 assume(true) statements.
[2020-08-18 21:07:11,294 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:11 BoogieIcfgContainer
[2020-08-18 21:07:11,294 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 21:07:11,296 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 21:07:11,296 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 21:07:11,300 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 21:07:11,300 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:07:09" (1/3) ...
[2020-08-18 21:07:11,301 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dee5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:11, skipping insertion in model container
[2020-08-18 21:07:11,301 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:07:10" (2/3) ...
[2020-08-18 21:07:11,302 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71dee5e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:07:11, skipping insertion in model container
[2020-08-18 21:07:11,302 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:07:11" (3/3) ...
[2020-08-18 21:07:11,304 INFO  L109   eAbstractionObserver]: Analyzing ICFG list_flag-1.i
[2020-08-18 21:07:11,317 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 21:07:11,325 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 21:07:11,342 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 21:07:11,369 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 21:07:11,370 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 21:07:11,370 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 21:07:11,370 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 21:07:11,370 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 21:07:11,370 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 21:07:11,371 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 21:07:11,371 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 21:07:11,391 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states.
[2020-08-18 21:07:11,398 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-08-18 21:07:11,398 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 21:07:11,399 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 21:07:11,400 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 21:07:11,406 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 21:07:11,406 INFO  L82        PathProgramCache]: Analyzing trace with hash 1184417696, now seen corresponding path program 1 times
[2020-08-18 21:07:11,415 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 21:07:11,416 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930029942]
[2020-08-18 21:07:11,416 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 21:07:11,517 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:11,585 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 21:07:11,589 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:11,600 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 21:07:11,600 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930029942]
[2020-08-18 21:07:11,603 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 21:07:11,603 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 21:07:11,604 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42911959]
[2020-08-18 21:07:11,610 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 21:07:11,610 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 21:07:11,624 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 21:07:11,625 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 21:07:11,628 INFO  L87              Difference]: Start difference. First operand 32 states. Second operand 3 states.
[2020-08-18 21:07:11,727 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 21:07:11,728 INFO  L93              Difference]: Finished difference Result 46 states and 61 transitions.
[2020-08-18 21:07:11,728 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 21:07:11,730 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 15
[2020-08-18 21:07:11,730 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 21:07:11,738 INFO  L225             Difference]: With dead ends: 46
[2020-08-18 21:07:11,738 INFO  L226             Difference]: Without dead ends: 24
[2020-08-18 21:07:11,742 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 21:07:11,755 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-08-18 21:07:11,769 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2020-08-18 21:07:11,771 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-08-18 21:07:11,772 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions.
[2020-08-18 21:07:11,773 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15
[2020-08-18 21:07:11,773 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 21:07:11,774 INFO  L479      AbstractCegarLoop]: Abstraction has 24 states and 28 transitions.
[2020-08-18 21:07:11,774 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 21:07:11,774 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions.
[2020-08-18 21:07:11,775 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-08-18 21:07:11,775 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 21:07:11,775 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 21:07:11,775 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 21:07:11,776 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 21:07:11,790 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 21:07:11,790 INFO  L82        PathProgramCache]: Analyzing trace with hash -218242506, now seen corresponding path program 1 times
[2020-08-18 21:07:11,790 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 21:07:11,791 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816102038]
[2020-08-18 21:07:11,791 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 21:07:11,818 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:11,913 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 21:07:11,915 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:11,923 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 21:07:11,923 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816102038]
[2020-08-18 21:07:11,923 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 21:07:11,924 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 21:07:11,924 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16365154]
[2020-08-18 21:07:11,926 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 21:07:11,926 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 21:07:11,926 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 21:07:11,927 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 21:07:11,927 INFO  L87              Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states.
[2020-08-18 21:07:12,074 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 21:07:12,075 INFO  L93              Difference]: Finished difference Result 48 states and 57 transitions.
[2020-08-18 21:07:12,075 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 21:07:12,076 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 17
[2020-08-18 21:07:12,076 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 21:07:12,077 INFO  L225             Difference]: With dead ends: 48
[2020-08-18 21:07:12,077 INFO  L226             Difference]: Without dead ends: 44
[2020-08-18 21:07:12,078 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 21:07:12,079 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-08-18 21:07:12,085 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32.
[2020-08-18 21:07:12,086 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-08-18 21:07:12,087 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions.
[2020-08-18 21:07:12,087 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17
[2020-08-18 21:07:12,088 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 21:07:12,088 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 38 transitions.
[2020-08-18 21:07:12,088 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 21:07:12,088 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions.
[2020-08-18 21:07:12,089 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-08-18 21:07:12,089 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 21:07:12,089 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 21:07:12,089 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 21:07:12,090 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 21:07:12,090 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 21:07:12,090 INFO  L82        PathProgramCache]: Analyzing trace with hash 771025649, now seen corresponding path program 1 times
[2020-08-18 21:07:12,090 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 21:07:12,091 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495588130]
[2020-08-18 21:07:12,091 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 21:07:12,110 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:12,191 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 21:07:12,194 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:12,208 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 21:07:12,209 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495588130]
[2020-08-18 21:07:12,209 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 21:07:12,209 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 21:07:12,209 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995997201]
[2020-08-18 21:07:12,210 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 21:07:12,210 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 21:07:12,210 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 21:07:12,211 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 21:07:12,211 INFO  L87              Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states.
[2020-08-18 21:07:12,357 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 21:07:12,358 INFO  L93              Difference]: Finished difference Result 50 states and 58 transitions.
[2020-08-18 21:07:12,358 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 21:07:12,358 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 19
[2020-08-18 21:07:12,359 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 21:07:12,359 INFO  L225             Difference]: With dead ends: 50
[2020-08-18 21:07:12,359 INFO  L226             Difference]: Without dead ends: 42
[2020-08-18 21:07:12,360 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 21:07:12,361 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-08-18 21:07:12,365 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30.
[2020-08-18 21:07:12,365 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-08-18 21:07:12,366 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions.
[2020-08-18 21:07:12,367 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19
[2020-08-18 21:07:12,367 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 21:07:12,367 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 35 transitions.
[2020-08-18 21:07:12,367 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 21:07:12,367 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions.
[2020-08-18 21:07:12,368 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-08-18 21:07:12,368 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 21:07:12,369 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 21:07:12,369 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 21:07:12,369 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 21:07:12,370 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 21:07:12,370 INFO  L82        PathProgramCache]: Analyzing trace with hash -472715872, now seen corresponding path program 1 times
[2020-08-18 21:07:12,370 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 21:07:12,370 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357994111]
[2020-08-18 21:07:12,370 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 21:07:12,387 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:12,490 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 21:07:12,492 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:12,505 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 21:07:12,509 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357994111]
[2020-08-18 21:07:12,509 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 21:07:12,509 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 21:07:12,510 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882347630]
[2020-08-18 21:07:12,510 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 21:07:12,511 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 21:07:12,511 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 21:07:12,511 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 21:07:12,512 INFO  L87              Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states.
[2020-08-18 21:07:12,668 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 21:07:12,668 INFO  L93              Difference]: Finished difference Result 48 states and 55 transitions.
[2020-08-18 21:07:12,669 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 21:07:12,669 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 19
[2020-08-18 21:07:12,669 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 21:07:12,671 INFO  L225             Difference]: With dead ends: 48
[2020-08-18 21:07:12,672 INFO  L226             Difference]: Without dead ends: 38
[2020-08-18 21:07:12,672 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 21:07:12,675 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-08-18 21:07:12,680 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26.
[2020-08-18 21:07:12,680 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-08-18 21:07:12,682 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions.
[2020-08-18 21:07:12,682 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19
[2020-08-18 21:07:12,682 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 21:07:12,682 INFO  L479      AbstractCegarLoop]: Abstraction has 26 states and 30 transitions.
[2020-08-18 21:07:12,683 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 21:07:12,683 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions.
[2020-08-18 21:07:12,683 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-08-18 21:07:12,683 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 21:07:12,684 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 21:07:12,685 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 21:07:12,685 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 21:07:12,685 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 21:07:12,685 INFO  L82        PathProgramCache]: Analyzing trace with hash -1962636917, now seen corresponding path program 1 times
[2020-08-18 21:07:12,686 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 21:07:12,686 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160561099]
[2020-08-18 21:07:12,686 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 21:07:12,729 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:12,792 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 21:07:12,794 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 21:07:12,798 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 21:07:12,799 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160561099]
[2020-08-18 21:07:12,799 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 21:07:12,799 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 21:07:12,799 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995200479]
[2020-08-18 21:07:12,800 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 21:07:12,800 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 21:07:12,800 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 21:07:12,800 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 21:07:12,801 INFO  L87              Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states.
[2020-08-18 21:07:12,865 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 21:07:12,865 INFO  L93              Difference]: Finished difference Result 54 states and 64 transitions.
[2020-08-18 21:07:12,865 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 21:07:12,866 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 23
[2020-08-18 21:07:12,866 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 21:07:12,867 INFO  L225             Difference]: With dead ends: 54
[2020-08-18 21:07:12,867 INFO  L226             Difference]: Without dead ends: 38
[2020-08-18 21:07:12,867 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 21:07:12,868 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-08-18 21:07:12,872 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34.
[2020-08-18 21:07:12,872 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-08-18 21:07:12,873 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions.
[2020-08-18 21:07:12,873 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23
[2020-08-18 21:07:12,874 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 21:07:12,874 INFO  L479      AbstractCegarLoop]: Abstraction has 34 states and 39 transitions.
[2020-08-18 21:07:12,874 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 21:07:12,874 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions.
[2020-08-18 21:07:12,875 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-08-18 21:07:12,875 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 21:07:12,875 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 21:07:12,876 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 21:07:12,876 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 21:07:12,876 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 21:07:12,876 INFO  L82        PathProgramCache]: Analyzing trace with hash 1888593434, now seen corresponding path program 1 times
[2020-08-18 21:07:12,877 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 21:07:12,877 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159841432]
[2020-08-18 21:07:12,877 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 21:07:12,898 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-18 21:07:12,900 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-18 21:07:12,900 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-18 21:07:12,904 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 21:07:12,921 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:07:12 BoogieIcfgContainer
[2020-08-18 21:07:12,921 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-18 21:07:12,924 INFO  L168              Benchmark]: Toolchain (without parser) took 2926.66 ms. Allocated memory was 142.1 MB in the beginning and 234.9 MB in the end (delta: 92.8 MB). Free memory was 104.4 MB in the beginning and 108.8 MB in the end (delta: -4.4 MB). Peak memory consumption was 88.4 MB. Max. memory is 7.1 GB.
[2020-08-18 21:07:12,925 INFO  L168              Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 123.7 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-08-18 21:07:12,926 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 604.62 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 104.2 MB in the beginning and 172.2 MB in the end (delta: -68.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB.
[2020-08-18 21:07:12,927 INFO  L168              Benchmark]: Boogie Preprocessor took 56.87 ms. Allocated memory is still 205.5 MB. Free memory was 172.2 MB in the beginning and 169.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB.
[2020-08-18 21:07:12,928 INFO  L168              Benchmark]: RCFGBuilder took 634.40 ms. Allocated memory is still 205.5 MB. Free memory was 169.7 MB in the beginning and 126.0 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB.
[2020-08-18 21:07:12,929 INFO  L168              Benchmark]: TraceAbstraction took 1625.44 ms. Allocated memory was 205.5 MB in the beginning and 234.9 MB in the end (delta: 29.4 MB). Free memory was 125.4 MB in the beginning and 108.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 46.0 MB. Max. memory is 7.1 GB.
[2020-08-18 21:07:12,932 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 123.7 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 604.62 ms. Allocated memory was 142.1 MB in the beginning and 205.5 MB in the end (delta: 63.4 MB). Free memory was 104.2 MB in the beginning and 172.2 MB in the end (delta: -68.1 MB). Peak memory consumption was 25.5 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 56.87 ms. Allocated memory is still 205.5 MB. Free memory was 172.2 MB in the beginning and 169.7 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 634.40 ms. Allocated memory is still 205.5 MB. Free memory was 169.7 MB in the beginning and 126.0 MB in the end (delta: 43.7 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1625.44 ms. Allocated memory was 205.5 MB in the beginning and 234.9 MB in the end (delta: 29.4 MB). Free memory was 125.4 MB in the beginning and 108.8 MB in the end (delta: 16.6 MB). Peak memory consumption was 46.0 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: 1.5s, 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...