/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i


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This is Ultimate 0.1.25-267fbe0
[2020-07-17 17:24:55,863 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-17 17:24:55,865 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-17 17:24:55,886 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-17 17:24:55,886 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-17 17:24:55,888 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-17 17:24:55,890 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-17 17:24:55,903 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-17 17:24:55,905 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-17 17:24:55,909 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-17 17:24:55,911 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-17 17:24:55,912 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-17 17:24:55,912 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-17 17:24:55,916 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-17 17:24:55,918 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-17 17:24:55,919 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-17 17:24:55,920 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-17 17:24:55,922 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-17 17:24:55,924 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-17 17:24:55,931 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-17 17:24:55,935 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-17 17:24:55,938 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-17 17:24:55,940 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-17 17:24:55,941 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-17 17:24:55,944 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-17 17:24:55,944 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-17 17:24:55,944 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-17 17:24:55,948 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-17 17:24:55,949 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-17 17:24:55,950 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-17 17:24:55,950 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-17 17:24:55,951 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-17 17:24:55,953 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-17 17:24:55,954 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-17 17:24:55,955 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-17 17:24:55,955 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-17 17:24:55,959 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-17 17:24:55,962 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-17 17:24:55,963 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2020-07-17 17:24:55,977 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-17 17:24:55,977 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-17 17:24:55,980 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-17 17:24:55,980 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-17 17:24:55,980 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-17 17:24:55,980 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-17 17:24:55,981 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-17 17:24:55,981 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-17 17:24:55,981 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-17 17:24:55,981 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-17 17:24:55,982 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-17 17:24:55,983 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-17 17:24:55,983 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-17 17:24:55,983 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-17 17:24:55,984 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-17 17:24:55,984 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2020-07-17 17:24:55,984 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-17 17:24:55,984 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-17 17:24:55,984 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-17 17:24:55,985 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-17 17:24:55,985 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2020-07-17 17:24:55,985 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-17 17:24:55,985 INFO  L138        SettingsManager]:  * Use separate solver for trace checks=false
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: Use separate solver for trace checks -> true
[2020-07-17 17:24:56,272 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-17 17:24:56,287 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-17 17:24:56,290 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-17 17:24:56,292 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-17 17:24:56,292 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-17 17:24:56,293 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i
[2020-07-17 17:24:56,363 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60dafef3/c3d9277356634b919d32a585ca9859ce/FLAG36af349dd
[2020-07-17 17:24:56,968 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-17 17:24:56,969 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i
[2020-07-17 17:24:56,983 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60dafef3/c3d9277356634b919d32a585ca9859ce/FLAG36af349dd
[2020-07-17 17:24:57,204 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c60dafef3/c3d9277356634b919d32a585ca9859ce
[2020-07-17 17:24:57,215 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-17 17:24:57,219 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-17 17:24:57,220 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-17 17:24:57,220 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-17 17:24:57,224 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-17 17:24:57,225 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:24:57" (1/1) ...
[2020-07-17 17:24:57,229 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d77b1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57, skipping insertion in model container
[2020-07-17 17:24:57,229 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:24:57" (1/1) ...
[2020-07-17 17:24:57,237 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-17 17:24:57,278 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-17 17:24:57,746 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-17 17:24:57,755 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-17 17:24:57,855 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-17 17:24:57,907 INFO  L208         MainTranslator]: Completed translation
[2020-07-17 17:24:57,908 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57 WrapperNode
[2020-07-17 17:24:57,908 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-17 17:24:57,909 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-17 17:24:57,909 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-17 17:24:57,909 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-17 17:24:57,923 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57" (1/1) ...
[2020-07-17 17:24:57,923 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57" (1/1) ...
[2020-07-17 17:24:57,942 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57" (1/1) ...
[2020-07-17 17:24:57,943 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57" (1/1) ...
[2020-07-17 17:24:57,966 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57" (1/1) ...
[2020-07-17 17:24:57,978 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57" (1/1) ...
[2020-07-17 17:24:57,982 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57" (1/1) ...
[2020-07-17 17:24:57,990 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-17 17:24:57,991 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-17 17:24:57,991 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-17 17:24:57,991 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-17 17:24:57,992 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57" (1/1) ...
No working directory specified, using /storage/repos/ultimate/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
[2020-07-17 17:24:58,063 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-17 17:24:58,063 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-17 17:24:58,063 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-07-17 17:24:58,064 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-07-17 17:24:58,064 INFO  L138     BoogieDeclarations]: Found implementation of procedure fail
[2020-07-17 17:24:58,064 INFO  L138     BoogieDeclarations]: Found implementation of procedure alloc_node
[2020-07-17 17:24:58,064 INFO  L138     BoogieDeclarations]: Found implementation of procedure chain_node
[2020-07-17 17:24:58,064 INFO  L138     BoogieDeclarations]: Found implementation of procedure create_sll
[2020-07-17 17:24:58,064 INFO  L138     BoogieDeclarations]: Found implementation of procedure init_back_link
[2020-07-17 17:24:58,065 INFO  L138     BoogieDeclarations]: Found implementation of procedure reverse_dll
[2020-07-17 17:24:58,065 INFO  L138     BoogieDeclarations]: Found implementation of procedure remove_fw_link
[2020-07-17 17:24:58,066 INFO  L138     BoogieDeclarations]: Found implementation of procedure check_seq_next
[2020-07-17 17:24:58,066 INFO  L138     BoogieDeclarations]: Found implementation of procedure check_seq_prev
[2020-07-17 17:24:58,066 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-17 17:24:58,067 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-17 17:24:58,067 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-07-17 17:24:58,067 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-07-17 17:24:58,068 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-07-17 17:24:58,068 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-07-17 17:24:58,069 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-07-17 17:24:58,069 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-07-17 17:24:58,069 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-07-17 17:24:58,071 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-07-17 17:24:58,071 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-07-17 17:24:58,072 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-07-17 17:24:58,072 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-07-17 17:24:58,072 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-07-17 17:24:58,072 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-07-17 17:24:58,072 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-07-17 17:24:58,073 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-07-17 17:24:58,073 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-07-17 17:24:58,073 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-07-17 17:24:58,073 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-07-17 17:24:58,073 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-07-17 17:24:58,073 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-07-17 17:24:58,074 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-07-17 17:24:58,074 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-07-17 17:24:58,074 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-07-17 17:24:58,074 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-07-17 17:24:58,074 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-07-17 17:24:58,074 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-07-17 17:24:58,074 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-07-17 17:24:58,075 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-07-17 17:24:58,075 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-07-17 17:24:58,075 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-07-17 17:24:58,075 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-07-17 17:24:58,076 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-07-17 17:24:58,076 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-07-17 17:24:58,076 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-07-17 17:24:58,076 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-07-17 17:24:58,076 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-07-17 17:24:58,076 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-07-17 17:24:58,076 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-07-17 17:24:58,077 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-07-17 17:24:58,077 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-07-17 17:24:58,077 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-07-17 17:24:58,077 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-07-17 17:24:58,077 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-07-17 17:24:58,077 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-07-17 17:24:58,078 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-07-17 17:24:58,078 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-07-17 17:24:58,078 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-07-17 17:24:58,078 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-07-17 17:24:58,078 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-07-17 17:24:58,078 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-07-17 17:24:58,078 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-07-17 17:24:58,079 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-07-17 17:24:58,079 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-07-17 17:24:58,079 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-07-17 17:24:58,079 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-07-17 17:24:58,079 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-07-17 17:24:58,080 INFO  L130     BoogieDeclarations]: Found specification of procedure cfree
[2020-07-17 17:24:58,080 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-07-17 17:24:58,080 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-07-17 17:24:58,081 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-07-17 17:24:58,081 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-17 17:24:58,081 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-07-17 17:24:58,082 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-07-17 17:24:58,082 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-07-17 17:24:58,082 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-07-17 17:24:58,083 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-07-17 17:24:58,083 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-07-17 17:24:58,083 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-07-17 17:24:58,083 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-07-17 17:24:58,083 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-07-17 17:24:58,083 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-07-17 17:24:58,084 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-07-17 17:24:58,085 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-07-17 17:24:58,085 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-07-17 17:24:58,085 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-07-17 17:24:58,086 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-07-17 17:24:58,086 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-07-17 17:24:58,086 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-07-17 17:24:58,086 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-07-17 17:24:58,087 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-07-17 17:24:58,087 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-07-17 17:24:58,087 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-07-17 17:24:58,087 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-07-17 17:24:58,087 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-07-17 17:24:58,087 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-07-17 17:24:58,088 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-07-17 17:24:58,088 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-07-17 17:24:58,088 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-07-17 17:24:58,088 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-07-17 17:24:58,088 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-07-17 17:24:58,088 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-07-17 17:24:58,088 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-07-17 17:24:58,088 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-07-17 17:24:58,089 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-07-17 17:24:58,089 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-07-17 17:24:58,089 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-07-17 17:24:58,089 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-07-17 17:24:58,089 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-07-17 17:24:58,089 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-07-17 17:24:58,090 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-07-17 17:24:58,090 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-07-17 17:24:58,090 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-07-17 17:24:58,090 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-17 17:24:58,090 INFO  L130     BoogieDeclarations]: Found specification of procedure fail
[2020-07-17 17:24:58,090 INFO  L130     BoogieDeclarations]: Found specification of procedure alloc_node
[2020-07-17 17:24:58,090 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-17 17:24:58,091 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-07-17 17:24:58,091 INFO  L130     BoogieDeclarations]: Found specification of procedure chain_node
[2020-07-17 17:24:58,091 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-07-17 17:24:58,091 INFO  L130     BoogieDeclarations]: Found specification of procedure create_sll
[2020-07-17 17:24:58,092 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-17 17:24:58,092 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$
[2020-07-17 17:24:58,092 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-17 17:24:58,093 INFO  L130     BoogieDeclarations]: Found specification of procedure init_back_link
[2020-07-17 17:24:58,093 INFO  L130     BoogieDeclarations]: Found specification of procedure reverse_dll
[2020-07-17 17:24:58,093 INFO  L130     BoogieDeclarations]: Found specification of procedure remove_fw_link
[2020-07-17 17:24:58,093 INFO  L130     BoogieDeclarations]: Found specification of procedure check_seq_next
[2020-07-17 17:24:58,093 INFO  L130     BoogieDeclarations]: Found specification of procedure check_seq_prev
[2020-07-17 17:24:58,093 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-17 17:24:58,094 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-17 17:24:58,094 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-17 17:24:58,933 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-17 17:24:58,934 INFO  L295             CfgBuilder]: Removed 33 assume(true) statements.
[2020-07-17 17:24:58,955 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:24:58 BoogieIcfgContainer
[2020-07-17 17:24:58,956 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-17 17:24:58,957 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-17 17:24:58,957 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-17 17:24:58,960 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-17 17:24:58,960 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:24:57" (1/3) ...
[2020-07-17 17:24:58,961 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c60c9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:24:58, skipping insertion in model container
[2020-07-17 17:24:58,962 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:24:57" (2/3) ...
[2020-07-17 17:24:58,962 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c60c9df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:24:58, skipping insertion in model container
[2020-07-17 17:24:58,962 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:24:58" (3/3) ...
[2020-07-17 17:24:58,964 INFO  L109   eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i
[2020-07-17 17:24:58,974 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-07-17 17:24:58,982 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-17 17:24:58,996 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-17 17:24:59,016 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-17 17:24:59,016 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-17 17:24:59,016 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-07-17 17:24:59,017 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-17 17:24:59,017 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-17 17:24:59,017 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-17 17:24:59,017 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-17 17:24:59,017 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-17 17:24:59,046 INFO  L276                IsEmpty]: Start isEmpty. Operand 208 states.
[2020-07-17 17:24:59,064 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-07-17 17:24:59,064 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 17:24:59,066 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-17 17:24:59,066 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 17:24:59,073 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 17:24:59,073 INFO  L82        PathProgramCache]: Analyzing trace with hash 2069327278, now seen corresponding path program 1 times
[2020-07-17 17:24:59,082 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-17 17:24:59,083 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212051634]
[2020-07-17 17:24:59,083 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 17:24:59,198 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:24:59,290 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:24:59,321 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:24:59,342 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-17 17:24:59,343 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212051634]
[2020-07-17 17:24:59,345 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-17 17:24:59,346 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-17 17:24:59,347 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691160737]
[2020-07-17 17:24:59,352 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-17 17:24:59,352 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-17 17:24:59,367 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-17 17:24:59,368 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-17 17:24:59,370 INFO  L87              Difference]: Start difference. First operand 208 states. Second operand 4 states.
[2020-07-17 17:24:59,865 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-17 17:24:59,865 INFO  L93              Difference]: Finished difference Result 423 states and 572 transitions.
[2020-07-17 17:24:59,866 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-17 17:24:59,867 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 41
[2020-07-17 17:24:59,868 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-17 17:24:59,883 INFO  L225             Difference]: With dead ends: 423
[2020-07-17 17:24:59,883 INFO  L226             Difference]: Without dead ends: 211
[2020-07-17 17:24:59,890 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-07-17 17:24:59,911 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 211 states.
[2020-07-17 17:24:59,980 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 188.
[2020-07-17 17:24:59,982 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 188 states.
[2020-07-17 17:24:59,988 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 208 transitions.
[2020-07-17 17:24:59,991 INFO  L78                 Accepts]: Start accepts. Automaton has 188 states and 208 transitions. Word has length 41
[2020-07-17 17:24:59,992 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-17 17:24:59,992 INFO  L479      AbstractCegarLoop]: Abstraction has 188 states and 208 transitions.
[2020-07-17 17:24:59,992 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-17 17:24:59,992 INFO  L276                IsEmpty]: Start isEmpty. Operand 188 states and 208 transitions.
[2020-07-17 17:24:59,999 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2020-07-17 17:24:59,999 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 17:25:00,000 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-17 17:25:00,000 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-07-17 17:25:00,001 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 17:25:00,001 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 17:25:00,001 INFO  L82        PathProgramCache]: Analyzing trace with hash 2121642840, now seen corresponding path program 1 times
[2020-07-17 17:25:00,002 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-17 17:25:00,002 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884592953]
[2020-07-17 17:25:00,002 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 17:25:00,149 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:00,392 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:00,479 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:00,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:00,927 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:01,039 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:02,218 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:02,754 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-17 17:25:02,755 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884592953]
[2020-07-17 17:25:02,755 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-17 17:25:02,755 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34
[2020-07-17 17:25:02,755 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187188079]
[2020-07-17 17:25:02,757 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 34 states
[2020-07-17 17:25:02,758 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-17 17:25:02,758 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2020-07-17 17:25:02,759 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122
[2020-07-17 17:25:02,759 INFO  L87              Difference]: Start difference. First operand 188 states and 208 transitions. Second operand 34 states.
[2020-07-17 17:25:03,654 WARN  L193               SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 65
[2020-07-17 17:25:08,716 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-17 17:25:08,717 INFO  L93              Difference]: Finished difference Result 263 states and 298 transitions.
[2020-07-17 17:25:08,717 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-07-17 17:25:08,717 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states. Word has length 85
[2020-07-17 17:25:08,718 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-17 17:25:08,723 INFO  L225             Difference]: With dead ends: 263
[2020-07-17 17:25:08,723 INFO  L226             Difference]: Without dead ends: 260
[2020-07-17 17:25:08,728 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306
[2020-07-17 17:25:08,730 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 260 states.
[2020-07-17 17:25:08,798 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 205.
[2020-07-17 17:25:08,798 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 205 states.
[2020-07-17 17:25:08,800 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions.
[2020-07-17 17:25:08,802 INFO  L78                 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 85
[2020-07-17 17:25:08,803 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-17 17:25:08,803 INFO  L479      AbstractCegarLoop]: Abstraction has 205 states and 227 transitions.
[2020-07-17 17:25:08,803 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 34 states.
[2020-07-17 17:25:08,803 INFO  L276                IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions.
[2020-07-17 17:25:08,813 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 88
[2020-07-17 17:25:08,813 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 17:25:08,814 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-17 17:25:08,814 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-07-17 17:25:08,814 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 17:25:08,815 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 17:25:08,815 INFO  L82        PathProgramCache]: Analyzing trace with hash -1210442558, now seen corresponding path program 1 times
[2020-07-17 17:25:08,815 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-17 17:25:08,816 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625694164]
[2020-07-17 17:25:08,816 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 17:25:08,854 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:08,965 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:09,010 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:09,444 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:09,565 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:09,679 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:10,687 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-17 17:25:11,279 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-17 17:25:11,280 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625694164]
[2020-07-17 17:25:11,280 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-17 17:25:11,280 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34
[2020-07-17 17:25:11,281 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025826117]
[2020-07-17 17:25:11,281 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 34 states
[2020-07-17 17:25:11,282 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-17 17:25:11,282 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2020-07-17 17:25:11,283 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122
[2020-07-17 17:25:11,283 INFO  L87              Difference]: Start difference. First operand 205 states and 227 transitions. Second operand 34 states.
[2020-07-17 17:25:17,926 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-17 17:25:17,927 INFO  L93              Difference]: Finished difference Result 271 states and 308 transitions.
[2020-07-17 17:25:17,928 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. 
[2020-07-17 17:25:17,929 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states. Word has length 87
[2020-07-17 17:25:17,929 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-17 17:25:17,932 INFO  L225             Difference]: With dead ends: 271
[2020-07-17 17:25:17,933 INFO  L226             Difference]: Without dead ends: 268
[2020-07-17 17:25:17,935 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=265, Invalid=3275, Unknown=0, NotChecked=0, Total=3540
[2020-07-17 17:25:17,936 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 268 states.
[2020-07-17 17:25:17,963 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 205.
[2020-07-17 17:25:17,964 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 205 states.
[2020-07-17 17:25:17,965 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions.
[2020-07-17 17:25:17,966 INFO  L78                 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 87
[2020-07-17 17:25:17,966 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-17 17:25:17,966 INFO  L479      AbstractCegarLoop]: Abstraction has 205 states and 226 transitions.
[2020-07-17 17:25:17,967 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 34 states.
[2020-07-17 17:25:17,967 INFO  L276                IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions.
[2020-07-17 17:25:17,968 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 94
[2020-07-17 17:25:17,968 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-17 17:25:17,968 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-17 17:25:17,969 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-07-17 17:25:17,969 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-17 17:25:17,969 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-17 17:25:17,969 INFO  L82        PathProgramCache]: Analyzing trace with hash 2145368719, now seen corresponding path program 1 times
[2020-07-17 17:25:17,970 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-17 17:25:17,970 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292037419]
[2020-07-17 17:25:17,970 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-17 17:25:18,002 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-17 17:25:18,027 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-17 17:25:18,068 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-17 17:25:18,068 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-17 17:25:18,069 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-07-17 17:25:18,170 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:25:18 BoogieIcfgContainer
[2020-07-17 17:25:18,171 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-17 17:25:18,173 INFO  L168              Benchmark]: Toolchain (without parser) took 20955.80 ms. Allocated memory was 145.2 MB in the beginning and 421.5 MB in the end (delta: 276.3 MB). Free memory was 100.8 MB in the beginning and 135.2 MB in the end (delta: -34.4 MB). Peak memory consumption was 241.9 MB. Max. memory is 7.1 GB.
[2020-07-17 17:25:18,174 INFO  L168              Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 145.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-17 17:25:18,175 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 688.26 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 100.3 MB in the beginning and 167.7 MB in the end (delta: -67.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB.
[2020-07-17 17:25:18,176 INFO  L168              Benchmark]: Boogie Preprocessor took 81.72 ms. Allocated memory is still 203.4 MB. Free memory was 167.7 MB in the beginning and 163.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB.
[2020-07-17 17:25:18,177 INFO  L168              Benchmark]: RCFGBuilder took 965.14 ms. Allocated memory was 203.4 MB in the beginning and 237.0 MB in the end (delta: 33.6 MB). Free memory was 163.7 MB in the beginning and 208.4 MB in the end (delta: -44.8 MB). Peak memory consumption was 79.6 MB. Max. memory is 7.1 GB.
[2020-07-17 17:25:18,178 INFO  L168              Benchmark]: TraceAbstraction took 19214.10 ms. Allocated memory was 237.0 MB in the beginning and 421.5 MB in the end (delta: 184.5 MB). Free memory was 208.4 MB in the beginning and 135.2 MB in the end (delta: 73.3 MB). Peak memory consumption was 257.8 MB. Max. memory is 7.1 GB.
[2020-07-17 17:25:18,182 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.28 ms. Allocated memory is still 145.2 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 688.26 ms. Allocated memory was 145.2 MB in the beginning and 203.4 MB in the end (delta: 58.2 MB). Free memory was 100.3 MB in the beginning and 167.7 MB in the end (delta: -67.3 MB). Peak memory consumption was 21.3 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 81.72 ms. Allocated memory is still 203.4 MB. Free memory was 167.7 MB in the beginning and 163.7 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 965.14 ms. Allocated memory was 203.4 MB in the beginning and 237.0 MB in the end (delta: 33.6 MB). Free memory was 163.7 MB in the beginning and 208.4 MB in the end (delta: -44.8 MB). Peak memory consumption was 79.6 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 19214.10 ms. Allocated memory was 237.0 MB in the beginning and 421.5 MB in the end (delta: 184.5 MB). Free memory was 208.4 MB in the beginning and 135.2 MB in the end (delta: 73.3 MB). Peak memory consumption was 257.8 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L628]              const struct node *p1, *p2;
        VAL         [p1={6:0}, p2={7:0}]
[L629]  CALL, EXPR  create_sll(&p1, &p2)
        VAL         [pp1={6:0}, pp2={7:0}]
[L577]              struct node *list = ((void *)0);
        VAL         [list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L579]  CALL        chain_node(&list)
        VAL         [ppnode={5:0}]
[L571]  CALL, EXPR  alloc_node()
[L562]              struct node *ptr = malloc(sizeof *ptr);
        VAL         [malloc(sizeof *ptr)={-1:0}, ptr={-1:0}]
[L563]  COND FALSE  !(!ptr)
        VAL         [malloc(sizeof *ptr)={-1:0}, ptr={-1:0}]
[L565]              ptr->next = ((void *)0)
        VAL         [malloc(sizeof *ptr)={-1:0}, ptr={-1:0}]
[L566]              ptr->prev = ((void *)0)
        VAL         [malloc(sizeof *ptr)={-1:0}, ptr={-1:0}]
[L567]              return ptr;
        VAL         [\result={-1:0}, malloc(sizeof *ptr)={-1:0}, ptr={-1:0}]
[L571]  RET, EXPR   alloc_node()
        VAL         [alloc_node()={-1:0}, ppnode={5:0}, ppnode={5:0}]
[L571]              struct node *node = alloc_node();
        VAL         [alloc_node()={-1:0}, node={-1:0}, ppnode={5:0}, ppnode={5:0}]
[L572]  EXPR        \read(**ppnode)
        VAL         [\read(**ppnode)={0:0}, node={-1:0}, ppnode={5:0}, ppnode={5:0}]
[L572]              node->next = *ppnode
        VAL         [\read(**ppnode)={0:0}, node={-1:0}, ppnode={5:0}, ppnode={5:0}]
[L573]              *ppnode = node
        VAL         [node={-1:0}, ppnode={5:0}, ppnode={5:0}]
[L579]  RET         chain_node(&list)
        VAL         [list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L580]  COND FALSE  !(__VERIFIER_nondet_int())
        VAL         [__VERIFIER_nondet_int()=0, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L581]  EXPR        \read(*list)
        VAL         [\read(*list)={-1:0}, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L581]              *pp2 = list
        VAL         [\read(*list)={-1:0}, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L582]  COND FALSE  !(__VERIFIER_nondet_int())
        VAL         [__VERIFIER_nondet_int()=0, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L584]  EXPR        \read(*list)
        VAL         [\read(*list)={-1:0}, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L584]              *pp1 = list
        VAL         [\read(*list)={-1:0}, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L586]  CALL        chain_node(&list)
        VAL         [ppnode={5:0}]
[L571]  CALL, EXPR  alloc_node()
[L562]              struct node *ptr = malloc(sizeof *ptr);
        VAL         [malloc(sizeof *ptr)={3:0}, ptr={3:0}]
[L563]  COND FALSE  !(!ptr)
        VAL         [malloc(sizeof *ptr)={3:0}, ptr={3:0}]
[L565]              ptr->next = ((void *)0)
        VAL         [malloc(sizeof *ptr)={3:0}, ptr={3:0}]
[L566]              ptr->prev = ((void *)0)
        VAL         [malloc(sizeof *ptr)={3:0}, ptr={3:0}]
[L567]              return ptr;
        VAL         [\result={3:0}, malloc(sizeof *ptr)={3:0}, ptr={3:0}]
[L571]  RET, EXPR   alloc_node()
        VAL         [alloc_node()={3:0}, ppnode={5:0}, ppnode={5:0}]
[L571]              struct node *node = alloc_node();
        VAL         [alloc_node()={3:0}, node={3:0}, ppnode={5:0}, ppnode={5:0}]
[L572]  EXPR        \read(**ppnode)
        VAL         [\read(**ppnode)={-1:0}, node={3:0}, ppnode={5:0}, ppnode={5:0}]
[L572]              node->next = *ppnode
        VAL         [\read(**ppnode)={-1:0}, node={3:0}, ppnode={5:0}, ppnode={5:0}]
[L573]              *ppnode = node
        VAL         [node={3:0}, ppnode={5:0}, ppnode={5:0}]
[L586]  RET         chain_node(&list)
        VAL         [list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L587]  COND FALSE  !(__VERIFIER_nondet_int())
        VAL         [__VERIFIER_nondet_int()=0, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L588]  EXPR        \read(*list)
        VAL         [\read(*list)={3:0}, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L588]              return list;
        VAL         [\read(*list)={3:0}, \result={3:0}, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L577]              struct node *list = ((void *)0);
        VAL         [\result={3:0}, list={5:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L588]              return list;
        VAL         [\result={3:0}, pp1={6:0}, pp1={6:0}, pp2={7:0}, pp2={7:0}]
[L629]  RET, EXPR   create_sll(&p1, &p2)
        VAL         [create_sll(&p1, &p2)={3:0}, p1={6:0}, p2={7:0}]
[L629]              struct node *list = create_sll(&p1, &p2);
        VAL         [create_sll(&p1, &p2)={3:0}, list={3:0}, p1={6:0}, p2={7:0}]
[L631]  EXPR        \read(*p1)
        VAL         [\read(*p1)={-1:0}, list={3:0}, p1={6:0}, p2={7:0}]
[L631]  EXPR        \read(*p2)
        VAL         [\read(*p1)={-1:0}, \read(*p2)={-1:0}, list={3:0}, p1={6:0}, p2={7:0}]
[L631]  CALL        check_seq_next(p1, p2)
        VAL         [beg={-1:0}, end={-1:0}]
[L615]  COND FALSE  !(!(beg))
        VAL         [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}]
[L616]  COND FALSE  !(!(end))
        VAL         [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}]
[L617]  EXPR        beg->next
        VAL         [beg={-1:0}, beg={-1:0}, beg->next={0:0}, end={-1:0}, end={-1:0}]
[L617]              beg = beg->next
        VAL         [beg={-1:0}, beg={0:0}, beg->next={0:0}, end={-1:0}, end={-1:0}]
[L617]  COND TRUE   end != beg
        VAL         [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}]
[L618]  COND TRUE   !(beg)
        VAL         [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}]
[L618]  CALL        fail()
[L554]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 14 procedures, 218 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 19.0s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 13.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 530 SDtfs, 1036 SDslu, 3212 SDs, 0 SdLazy, 7928 SolverSat, 315 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 141 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 5.0s InterpolantComputationTime, 306 NumberOfCodeBlocks, 306 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 642110 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 11/36 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...