/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i


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


This is Ultimate 0.1.25-86f66a4
[2020-07-07 13:23:02,474 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-07 13:23:02,476 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-07 13:23:02,488 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-07 13:23:02,488 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-07 13:23:02,489 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-07 13:23:02,491 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-07 13:23:02,493 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-07 13:23:02,494 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-07 13:23:02,495 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-07 13:23:02,496 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-07 13:23:02,497 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-07 13:23:02,497 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-07 13:23:02,498 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-07 13:23:02,499 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-07 13:23:02,500 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-07 13:23:02,501 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-07 13:23:02,502 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-07 13:23:02,504 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-07 13:23:02,506 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-07 13:23:02,507 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-07 13:23:02,509 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-07 13:23:02,510 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-07 13:23:02,511 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-07 13:23:02,513 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-07 13:23:02,513 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-07 13:23:02,514 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-07 13:23:02,514 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-07 13:23:02,515 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-07 13:23:02,516 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-07 13:23:02,516 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-07 13:23:02,517 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-07 13:23:02,517 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-07 13:23:02,518 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-07 13:23:02,519 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-07 13:23:02,520 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-07 13:23:02,520 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-07 13:23:02,520 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-07 13:23:02,521 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-07 13:23:02,522 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-07 13:23:02,523 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2020-07-07 13:23:02,535 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-07 13:23:02,536 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-07 13:23:02,537 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-07 13:23:02,537 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-07 13:23:02,538 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-07 13:23:02,538 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-07 13:23:02,538 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-07 13:23:02,538 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-07 13:23:02,539 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-07 13:23:02,539 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-07 13:23:02,539 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-07 13:23:02,539 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-07 13:23:02,539 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-07 13:23:02,540 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-07 13:23:02,540 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-07 13:23:02,540 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2020-07-07 13:23:02,541 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-07 13:23:02,541 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-07 13:23:02,542 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-07 13:23:02,542 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-07 13:23:02,542 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2020-07-07 13:23:02,542 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-07 13:23:02,542 INFO  L138        SettingsManager]:  * Use separate solver for trace checks=false
[2020-07-07 13:23:02,823 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-07 13:23:02,841 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-07 13:23:02,844 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-07 13:23:02,846 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-07 13:23:02,846 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-07 13:23:02,847 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i
[2020-07-07 13:23:02,908 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bf7f7bd7/7ef91d2021d24e91879118a70d728e3a/FLAGe0849b54e
[2020-07-07 13:23:03,470 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-07 13:23:03,471 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i
[2020-07-07 13:23:03,492 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bf7f7bd7/7ef91d2021d24e91879118a70d728e3a/FLAGe0849b54e
[2020-07-07 13:23:03,721 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0bf7f7bd7/7ef91d2021d24e91879118a70d728e3a
[2020-07-07 13:23:03,729 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-07 13:23:03,731 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-07 13:23:03,732 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-07 13:23:03,733 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-07 13:23:03,738 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-07 13:23:03,739 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:23:03" (1/1) ...
[2020-07-07 13:23:03,741 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b667e7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:03, skipping insertion in model container
[2020-07-07 13:23:03,742 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 01:23:03" (1/1) ...
[2020-07-07 13:23:03,750 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-07 13:23:03,812 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-07 13:23:04,310 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-07 13:23:04,324 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-07 13:23:04,403 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-07 13:23:04,460 INFO  L208         MainTranslator]: Completed translation
[2020-07-07 13:23:04,460 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04 WrapperNode
[2020-07-07 13:23:04,461 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-07 13:23:04,461 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-07 13:23:04,462 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-07 13:23:04,462 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-07 13:23:04,476 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04" (1/1) ...
[2020-07-07 13:23:04,476 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04" (1/1) ...
[2020-07-07 13:23:04,494 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04" (1/1) ...
[2020-07-07 13:23:04,495 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04" (1/1) ...
[2020-07-07 13:23:04,518 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04" (1/1) ...
[2020-07-07 13:23:04,531 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04" (1/1) ...
[2020-07-07 13:23:04,535 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04" (1/1) ...
[2020-07-07 13:23:04,543 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-07 13:23:04,544 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-07 13:23:04,544 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-07 13:23:04,544 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-07 13:23:04,545 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04" (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
[2020-07-07 13:23:04,610 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure fail
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure alloc_node
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure chain_node
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure create_sll
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure init_back_link
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure reverse_dll
[2020-07-07 13:23:04,611 INFO  L138     BoogieDeclarations]: Found implementation of procedure remove_fw_link
[2020-07-07 13:23:04,612 INFO  L138     BoogieDeclarations]: Found implementation of procedure check_seq_next
[2020-07-07 13:23:04,612 INFO  L138     BoogieDeclarations]: Found implementation of procedure check_seq_prev
[2020-07-07 13:23:04,612 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-07 13:23:04,612 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-07 13:23:04,612 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-07-07 13:23:04,613 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-07-07 13:23:04,613 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-07-07 13:23:04,613 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-07-07 13:23:04,613 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-07-07 13:23:04,614 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-07-07 13:23:04,614 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-07-07 13:23:04,616 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-07-07 13:23:04,616 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-07-07 13:23:04,616 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-07-07 13:23:04,616 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-07-07 13:23:04,616 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-07-07 13:23:04,616 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-07-07 13:23:04,617 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-07-07 13:23:04,617 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-07-07 13:23:04,617 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-07-07 13:23:04,617 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-07-07 13:23:04,617 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-07-07 13:23:04,618 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-07-07 13:23:04,618 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-07-07 13:23:04,618 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-07-07 13:23:04,618 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-07-07 13:23:04,619 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-07-07 13:23:04,619 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-07-07 13:23:04,619 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-07-07 13:23:04,619 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-07-07 13:23:04,619 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-07-07 13:23:04,619 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-07-07 13:23:04,619 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-07-07 13:23:04,619 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-07-07 13:23:04,620 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-07-07 13:23:04,620 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-07-07 13:23:04,620 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-07-07 13:23:04,620 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-07-07 13:23:04,620 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-07-07 13:23:04,620 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-07-07 13:23:04,620 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-07-07 13:23:04,620 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-07-07 13:23:04,621 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-07-07 13:23:04,621 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-07-07 13:23:04,621 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-07-07 13:23:04,621 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-07-07 13:23:04,621 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-07-07 13:23:04,621 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-07-07 13:23:04,621 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-07-07 13:23:04,621 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-07-07 13:23:04,621 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-07-07 13:23:04,622 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-07-07 13:23:04,622 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-07-07 13:23:04,622 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-07-07 13:23:04,622 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-07-07 13:23:04,622 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-07-07 13:23:04,622 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-07-07 13:23:04,622 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-07-07 13:23:04,622 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-07-07 13:23:04,622 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-07-07 13:23:04,623 INFO  L130     BoogieDeclarations]: Found specification of procedure cfree
[2020-07-07 13:23:04,623 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-07-07 13:23:04,623 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-07-07 13:23:04,623 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-07-07 13:23:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-07 13:23:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-07-07 13:23:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-07-07 13:23:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-07-07 13:23:04,624 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-07-07 13:23:04,625 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-07-07 13:23:04,625 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-07-07 13:23:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-07-07 13:23:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-07-07 13:23:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-07-07 13:23:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-07-07 13:23:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-07-07 13:23:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-07-07 13:23:04,626 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-07-07 13:23:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-07-07 13:23:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-07-07 13:23:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-07-07 13:23:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-07-07 13:23:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-07-07 13:23:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-07-07 13:23:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-07-07 13:23:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-07-07 13:23:04,627 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-07-07 13:23:04,628 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-07-07 13:23:04,628 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-07-07 13:23:04,628 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-07-07 13:23:04,629 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-07-07 13:23:04,629 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-07-07 13:23:04,629 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-07-07 13:23:04,629 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-07-07 13:23:04,629 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-07-07 13:23:04,629 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-07-07 13:23:04,629 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-07-07 13:23:04,630 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-07-07 13:23:04,630 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-07-07 13:23:04,630 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-07-07 13:23:04,630 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-07-07 13:23:04,630 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-07-07 13:23:04,630 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-07-07 13:23:04,630 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-07-07 13:23:04,631 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-07-07 13:23:04,631 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-07-07 13:23:04,631 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-07 13:23:04,631 INFO  L130     BoogieDeclarations]: Found specification of procedure fail
[2020-07-07 13:23:04,631 INFO  L130     BoogieDeclarations]: Found specification of procedure alloc_node
[2020-07-07 13:23:04,631 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-07 13:23:04,631 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-07-07 13:23:04,632 INFO  L130     BoogieDeclarations]: Found specification of procedure chain_node
[2020-07-07 13:23:04,632 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-07-07 13:23:04,632 INFO  L130     BoogieDeclarations]: Found specification of procedure create_sll
[2020-07-07 13:23:04,632 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-07 13:23:04,632 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$
[2020-07-07 13:23:04,633 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-07 13:23:04,633 INFO  L130     BoogieDeclarations]: Found specification of procedure init_back_link
[2020-07-07 13:23:04,633 INFO  L130     BoogieDeclarations]: Found specification of procedure reverse_dll
[2020-07-07 13:23:04,634 INFO  L130     BoogieDeclarations]: Found specification of procedure remove_fw_link
[2020-07-07 13:23:04,634 INFO  L130     BoogieDeclarations]: Found specification of procedure check_seq_next
[2020-07-07 13:23:04,634 INFO  L130     BoogieDeclarations]: Found specification of procedure check_seq_prev
[2020-07-07 13:23:04,634 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-07 13:23:04,634 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-07 13:23:04,634 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-07 13:23:05,382 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-07 13:23:05,383 INFO  L295             CfgBuilder]: Removed 33 assume(true) statements.
[2020-07-07 13:23:05,392 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:23:05 BoogieIcfgContainer
[2020-07-07 13:23:05,392 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-07 13:23:05,394 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-07 13:23:05,394 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-07 13:23:05,415 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-07 13:23:05,415 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 01:23:03" (1/3) ...
[2020-07-07 13:23:05,416 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1e86de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:23:05, skipping insertion in model container
[2020-07-07 13:23:05,417 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 01:23:04" (2/3) ...
[2020-07-07 13:23:05,421 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c1e86de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 01:23:05, skipping insertion in model container
[2020-07-07 13:23:05,422 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 01:23:05" (3/3) ...
[2020-07-07 13:23:05,425 INFO  L109   eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i
[2020-07-07 13:23:05,436 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-07-07 13:23:05,457 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-07 13:23:05,473 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-07 13:23:05,499 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-07 13:23:05,499 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-07 13:23:05,500 INFO  L377      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2020-07-07 13:23:05,500 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-07 13:23:05,500 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-07 13:23:05,500 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-07 13:23:05,500 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-07 13:23:05,501 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-07 13:23:05,524 INFO  L276                IsEmpty]: Start isEmpty. Operand 208 states.
[2020-07-07 13:23:05,536 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-07-07 13:23:05,537 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 13:23:05,538 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]
[2020-07-07 13:23:05,538 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 13:23:05,543 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 13:23:05,543 INFO  L82        PathProgramCache]: Analyzing trace with hash 2069327278, now seen corresponding path program 1 times
[2020-07-07 13:23:05,552 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-07 13:23:05,553 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698559082]
[2020-07-07 13:23:05,553 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 13:23:05,681 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:05,757 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:05,784 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:05,807 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-07 13:23:05,808 INFO  L185   leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration
[2020-07-07 13:23:05,810 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698559082]
[2020-07-07 13:23:05,812 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 13:23:05,812 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-07 13:23:05,813 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105662143]
[2020-07-07 13:23:05,818 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-07 13:23:05,818 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-07 13:23:05,833 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-07 13:23:05,834 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-07-07 13:23:05,836 INFO  L87              Difference]: Start difference. First operand 208 states. Second operand 4 states.
[2020-07-07 13:23:06,303 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 13:23:06,303 INFO  L93              Difference]: Finished difference Result 423 states and 572 transitions.
[2020-07-07 13:23:06,304 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-07 13:23:06,305 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 41
[2020-07-07 13:23:06,306 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 13:23:06,319 INFO  L225             Difference]: With dead ends: 423
[2020-07-07 13:23:06,320 INFO  L226             Difference]: Without dead ends: 211
[2020-07-07 13:23:06,327 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
[2020-07-07 13:23:06,347 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 211 states.
[2020-07-07 13:23:06,396 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 188.
[2020-07-07 13:23:06,398 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 188 states.
[2020-07-07 13:23:06,403 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 208 transitions.
[2020-07-07 13:23:06,407 INFO  L78                 Accepts]: Start accepts. Automaton has 188 states and 208 transitions. Word has length 41
[2020-07-07 13:23:06,407 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 13:23:06,407 INFO  L479      AbstractCegarLoop]: Abstraction has 188 states and 208 transitions.
[2020-07-07 13:23:06,407 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-07 13:23:06,407 INFO  L276                IsEmpty]: Start isEmpty. Operand 188 states and 208 transitions.
[2020-07-07 13:23:06,411 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 86
[2020-07-07 13:23:06,411 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 13:23:06,412 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]
[2020-07-07 13:23:06,412 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-07-07 13:23:06,412 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 13:23:06,413 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 13:23:06,413 INFO  L82        PathProgramCache]: Analyzing trace with hash 2121642840, now seen corresponding path program 1 times
[2020-07-07 13:23:06,413 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-07 13:23:06,417 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785392973]
[2020-07-07 13:23:06,417 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 13:23:06,693 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:07,020 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:07,064 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:07,474 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:07,618 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:07,719 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:08,446 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:08,915 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-07 13:23:08,915 INFO  L185   leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration
[2020-07-07 13:23:08,915 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785392973]
[2020-07-07 13:23:08,916 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 13:23:08,916 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36
[2020-07-07 13:23:08,916 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209002859]
[2020-07-07 13:23:08,917 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 36 states
[2020-07-07 13:23:08,918 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-07 13:23:08,918 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2020-07-07 13:23:08,919 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260
[2020-07-07 13:23:08,919 INFO  L87              Difference]: Start difference. First operand 188 states and 208 transitions. Second operand 36 states.
[2020-07-07 13:23:09,922 WARN  L193               SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 65
[2020-07-07 13:23:14,820 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 13:23:14,821 INFO  L93              Difference]: Finished difference Result 263 states and 298 transitions.
[2020-07-07 13:23:14,821 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. 
[2020-07-07 13:23:14,821 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states. Word has length 85
[2020-07-07 13:23:14,822 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 13:23:14,825 INFO  L225             Difference]: With dead ends: 263
[2020-07-07 13:23:14,826 INFO  L226             Difference]: Without dead ends: 260
[2020-07-07 13:23:14,828 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=267, Invalid=3273, Unknown=0, NotChecked=0, Total=3540
[2020-07-07 13:23:14,829 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 260 states.
[2020-07-07 13:23:14,867 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 205.
[2020-07-07 13:23:14,867 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 205 states.
[2020-07-07 13:23:14,868 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions.
[2020-07-07 13:23:14,869 INFO  L78                 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 85
[2020-07-07 13:23:14,869 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 13:23:14,869 INFO  L479      AbstractCegarLoop]: Abstraction has 205 states and 227 transitions.
[2020-07-07 13:23:14,870 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 36 states.
[2020-07-07 13:23:14,870 INFO  L276                IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions.
[2020-07-07 13:23:14,872 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 88
[2020-07-07 13:23:14,872 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 13:23:14,872 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]
[2020-07-07 13:23:14,873 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-07-07 13:23:14,873 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 13:23:14,873 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 13:23:14,873 INFO  L82        PathProgramCache]: Analyzing trace with hash -1210442558, now seen corresponding path program 1 times
[2020-07-07 13:23:14,873 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-07 13:23:14,874 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18376596]
[2020-07-07 13:23:14,874 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 13:23:14,943 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:15,037 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:15,075 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:15,579 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:15,705 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:15,817 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:16,619 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-07 13:23:17,061 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-07 13:23:17,062 INFO  L185   leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration
[2020-07-07 13:23:17,062 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18376596]
[2020-07-07 13:23:17,063 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-07 13:23:17,063 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36
[2020-07-07 13:23:17,063 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439124456]
[2020-07-07 13:23:17,064 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 36 states
[2020-07-07 13:23:17,064 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-07 13:23:17,065 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants.
[2020-07-07 13:23:17,065 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260
[2020-07-07 13:23:17,066 INFO  L87              Difference]: Start difference. First operand 205 states and 227 transitions. Second operand 36 states.
[2020-07-07 13:23:23,775 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-07 13:23:23,775 INFO  L93              Difference]: Finished difference Result 271 states and 308 transitions.
[2020-07-07 13:23:23,777 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. 
[2020-07-07 13:23:23,778 INFO  L78                 Accepts]: Start accepts. Automaton has 36 states. Word has length 87
[2020-07-07 13:23:23,778 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-07 13:23:23,781 INFO  L225             Difference]: With dead ends: 271
[2020-07-07 13:23:23,781 INFO  L226             Difference]: Without dead ends: 268
[2020-07-07 13:23:23,783 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=281, Invalid=3501, Unknown=0, NotChecked=0, Total=3782
[2020-07-07 13:23:23,784 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 268 states.
[2020-07-07 13:23:23,817 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 205.
[2020-07-07 13:23:23,817 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 205 states.
[2020-07-07 13:23:23,819 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions.
[2020-07-07 13:23:23,819 INFO  L78                 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 87
[2020-07-07 13:23:23,820 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-07 13:23:23,820 INFO  L479      AbstractCegarLoop]: Abstraction has 205 states and 226 transitions.
[2020-07-07 13:23:23,820 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 36 states.
[2020-07-07 13:23:23,820 INFO  L276                IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions.
[2020-07-07 13:23:23,822 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 94
[2020-07-07 13:23:23,823 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-07 13:23:23,823 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]
[2020-07-07 13:23:23,823 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-07-07 13:23:23,823 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-07 13:23:23,824 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-07 13:23:23,824 INFO  L82        PathProgramCache]: Analyzing trace with hash 2145368719, now seen corresponding path program 1 times
[2020-07-07 13:23:23,824 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-07 13:23:23,824 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022176141]
[2020-07-07 13:23:23,825 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-07-07 13:23:23,883 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-07 13:23:23,908 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-07 13:23:23,946 INFO  L185   leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration
[2020-07-07 13:23:23,946 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-07 13:23:23,946 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-07 13:23:23,947 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-07-07 13:23:23,968 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 01:23:23 BoogieIcfgContainer
[2020-07-07 13:23:23,968 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-07 13:23:23,970 INFO  L168              Benchmark]: Toolchain (without parser) took 20238.88 ms. Allocated memory was 138.4 MB in the beginning and 406.3 MB in the end (delta: 267.9 MB). Free memory was 101.0 MB in the beginning and 305.7 MB in the end (delta: -204.7 MB). Peak memory consumption was 63.2 MB. Max. memory is 7.1 GB.
[2020-07-07 13:23:23,971 INFO  L168              Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-07 13:23:23,972 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 728.60 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 100.8 MB in the beginning and 166.9 MB in the end (delta: -66.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB.
[2020-07-07 13:23:23,973 INFO  L168              Benchmark]: Boogie Preprocessor took 82.20 ms. Allocated memory is still 203.4 MB. Free memory was 166.9 MB in the beginning and 163.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB.
[2020-07-07 13:23:23,974 INFO  L168              Benchmark]: RCFGBuilder took 848.08 ms. Allocated memory is still 203.4 MB. Free memory was 163.4 MB in the beginning and 90.6 MB in the end (delta: 72.8 MB). Peak memory consumption was 72.8 MB. Max. memory is 7.1 GB.
[2020-07-07 13:23:23,974 INFO  L168              Benchmark]: TraceAbstraction took 18574.34 ms. Allocated memory was 203.4 MB in the beginning and 406.3 MB in the end (delta: 202.9 MB). Free memory was 90.4 MB in the beginning and 305.7 MB in the end (delta: -215.3 MB). There was no memory consumed. Max. memory is 7.1 GB.
[2020-07-07 13:23:23,978 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 728.60 ms. Allocated memory was 138.4 MB in the beginning and 203.4 MB in the end (delta: 65.0 MB). Free memory was 100.8 MB in the beginning and 166.9 MB in the end (delta: -66.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 82.20 ms. Allocated memory is still 203.4 MB. Free memory was 166.9 MB in the beginning and 163.4 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 848.08 ms. Allocated memory is still 203.4 MB. Free memory was 163.4 MB in the beginning and 90.6 MB in the end (delta: 72.8 MB). Peak memory consumption was 72.8 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 18574.34 ms. Allocated memory was 203.4 MB in the beginning and 406.3 MB in the end (delta: 202.9 MB). Free memory was 90.4 MB in the beginning and 305.7 MB in the end (delta: -215.3 MB). There was no memory consumed. 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;
[L629]  CALL, EXPR  create_sll(&p1, &p2)
[L577]              struct node *list = ((void *)0);
[L579]  CALL        chain_node(&list)
[L571]  CALL, EXPR  alloc_node()
[L562]              struct node *ptr = malloc(sizeof *ptr);
[L563]  COND FALSE  !(!ptr)
[L565]              ptr->next = ((void *)0)
[L566]              ptr->prev = ((void *)0)
[L567]              return ptr;
[L571]  RET, EXPR   alloc_node()
[L571]              struct node *node = alloc_node();
[L572]  EXPR        \read(**ppnode)
[L572]              node->next = *ppnode
[L573]              *ppnode = node
[L579]  RET         chain_node(&list)
[L580]  COND FALSE  !(__VERIFIER_nondet_int())
[L581]  EXPR        \read(*list)
[L581]              *pp2 = list
[L582]  COND FALSE  !(__VERIFIER_nondet_int())
[L584]  EXPR        \read(*list)
[L584]              *pp1 = list
[L586]  CALL        chain_node(&list)
[L571]  CALL, EXPR  alloc_node()
[L562]              struct node *ptr = malloc(sizeof *ptr);
[L563]  COND FALSE  !(!ptr)
[L565]              ptr->next = ((void *)0)
[L566]              ptr->prev = ((void *)0)
[L567]              return ptr;
[L571]  RET, EXPR   alloc_node()
[L571]              struct node *node = alloc_node();
[L572]  EXPR        \read(**ppnode)
[L572]              node->next = *ppnode
[L573]              *ppnode = node
[L586]  RET         chain_node(&list)
[L587]  COND FALSE  !(__VERIFIER_nondet_int())
[L588]  EXPR        \read(*list)
[L588]              return list;
[L577]              struct node *list = ((void *)0);
[L588]              return list;
[L629]  RET, EXPR   create_sll(&p1, &p2)
[L629]              struct node *list = create_sll(&p1, &p2);
[L631]  EXPR        \read(*p1)
[L631]  EXPR        \read(*p2)
[L631]  CALL        check_seq_next(p1, p2)
[L615]  COND FALSE  !(!(beg))
[L616]  COND FALSE  !(!(end))
[L617]  EXPR        beg->next
[L617]              beg = beg->next
[L617]  COND TRUE   end != beg
[L618]  COND TRUE   !(beg)
[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: 18.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 13.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 520 SDtfs, 1056 SDslu, 3286 SDs, 0 SdLazy, 8648 SolverSat, 326 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 148 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 7.3s 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: No data available, 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...