/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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 0.2.0-7d8eed3
[2020-11-07 00:49:24,987 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-11-07 00:49:24,990 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-11-07 00:49:25,026 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-11-07 00:49:25,026 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-11-07 00:49:25,028 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-11-07 00:49:25,029 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-11-07 00:49:25,032 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-11-07 00:49:25,034 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-11-07 00:49:25,035 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-11-07 00:49:25,036 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-11-07 00:49:25,037 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-11-07 00:49:25,038 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-11-07 00:49:25,039 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-11-07 00:49:25,041 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-11-07 00:49:25,042 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-11-07 00:49:25,043 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-11-07 00:49:25,053 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-11-07 00:49:25,077 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-11-07 00:49:25,088 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-11-07 00:49:25,091 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-11-07 00:49:25,096 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-11-07 00:49:25,099 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-11-07 00:49:25,100 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-11-07 00:49:25,103 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-11-07 00:49:25,106 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-11-07 00:49:25,106 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-11-07 00:49:25,107 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-11-07 00:49:25,113 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-11-07 00:49:25,115 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-11-07 00:49:25,117 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-11-07 00:49:25,118 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-11-07 00:49:25,119 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-11-07 00:49:25,120 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-11-07 00:49:25,122 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-11-07 00:49:25,122 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-11-07 00:49:25,124 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-11-07 00:49:25,126 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-11-07 00:49:25,128 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2020-11-07 00:49:25,150 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-11-07 00:49:25,151 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-11-07 00:49:25,156 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-11-07 00:49:25,156 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-11-07 00:49:25,156 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-11-07 00:49:25,157 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-11-07 00:49:25,157 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-11-07 00:49:25,157 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-11-07 00:49:25,157 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-11-07 00:49:25,157 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-11-07 00:49:25,159 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-11-07 00:49:25,159 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-11-07 00:49:25,159 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-11-07 00:49:25,159 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-11-07 00:49:25,160 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-11-07 00:49:25,160 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2020-11-07 00:49:25,160 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-11-07 00:49:25,160 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-11-07 00:49:25,161 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-11-07 00:49:25,161 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-11-07 00:49:25,161 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2020-11-07 00:49:25,161 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-11-07 00:49:25,161 INFO  L138        SettingsManager]:  * Use separate solver for trace checks=false
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2020-11-07 00:49:25,572 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-11-07 00:49:25,611 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-11-07 00:49:25,615 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-11-07 00:49:25,616 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-11-07 00:49:25,617 INFO  L275        PluginConnector]: CDTParser initialized
[2020-11-07 00:49:25,618 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i
[2020-11-07 00:49:25,694 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb2e2107/72271247263c4a29984f95d1f7888259/FLAG886ecf062
[2020-11-07 00:49:26,470 INFO  L306              CDTParser]: Found 1 translation units.
[2020-11-07 00:49:26,471 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i
[2020-11-07 00:49:26,495 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb2e2107/72271247263c4a29984f95d1f7888259/FLAG886ecf062
[2020-11-07 00:49:26,739 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9eb2e2107/72271247263c4a29984f95d1f7888259
[2020-11-07 00:49:26,744 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-11-07 00:49:26,753 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-11-07 00:49:26,757 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-11-07 00:49:26,758 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-11-07 00:49:26,762 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-11-07 00:49:26,763 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:49:26" (1/1) ...
[2020-11-07 00:49:26,767 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bbd1d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:26, skipping insertion in model container
[2020-11-07 00:49:26,767 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:49:26" (1/1) ...
[2020-11-07 00:49:26,776 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-11-07 00:49:26,818 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-11-07 00:49:27,142 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-11-07 00:49:27,152 INFO  L203         MainTranslator]: Completed pre-run
[2020-11-07 00:49:27,305 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-11-07 00:49:27,372 INFO  L208         MainTranslator]: Completed translation
[2020-11-07 00:49:27,373 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27 WrapperNode
[2020-11-07 00:49:27,373 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-11-07 00:49:27,374 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-11-07 00:49:27,374 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-11-07 00:49:27,375 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-11-07 00:49:27,389 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ...
[2020-11-07 00:49:27,389 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ...
[2020-11-07 00:49:27,407 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ...
[2020-11-07 00:49:27,408 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ...
[2020-11-07 00:49:27,433 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ...
[2020-11-07 00:49:27,444 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ...
[2020-11-07 00:49:27,449 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (1/1) ...
[2020-11-07 00:49:27,457 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-11-07 00:49:27,458 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-11-07 00:49:27,458 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-11-07 00:49:27,459 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-11-07 00:49:27,460 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (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
[2020-11-07 00:49:27,541 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-11-07 00:49:27,542 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-11-07 00:49:27,542 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2020-11-07 00:49:27,542 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-11-07 00:49:27,542 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-11-07 00:49:27,542 INFO  L138     BoogieDeclarations]: Found implementation of procedure fail
[2020-11-07 00:49:27,543 INFO  L138     BoogieDeclarations]: Found implementation of procedure alloc_node
[2020-11-07 00:49:27,543 INFO  L138     BoogieDeclarations]: Found implementation of procedure chain_node
[2020-11-07 00:49:27,543 INFO  L138     BoogieDeclarations]: Found implementation of procedure create_sll
[2020-11-07 00:49:27,543 INFO  L138     BoogieDeclarations]: Found implementation of procedure init_back_link
[2020-11-07 00:49:27,543 INFO  L138     BoogieDeclarations]: Found implementation of procedure reverse_dll
[2020-11-07 00:49:27,543 INFO  L138     BoogieDeclarations]: Found implementation of procedure remove_fw_link
[2020-11-07 00:49:27,544 INFO  L138     BoogieDeclarations]: Found implementation of procedure check_seq_next
[2020-11-07 00:49:27,544 INFO  L138     BoogieDeclarations]: Found implementation of procedure check_seq_prev
[2020-11-07 00:49:27,544 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-11-07 00:49:27,544 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-11-07 00:49:27,544 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-11-07 00:49:27,545 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_perror_fail
[2020-11-07 00:49:27,545 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert
[2020-11-07 00:49:27,545 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2020-11-07 00:49:27,545 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-11-07 00:49:27,545 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-11-07 00:49:27,546 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-11-07 00:49:27,546 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-11-07 00:49:27,546 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-11-07 00:49:27,546 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-11-07 00:49:27,546 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-11-07 00:49:27,546 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-11-07 00:49:27,547 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-11-07 00:49:27,547 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-11-07 00:49:27,547 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-11-07 00:49:27,547 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-11-07 00:49:27,547 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-11-07 00:49:27,548 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-11-07 00:49:27,548 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-11-07 00:49:27,548 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-11-07 00:49:27,548 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-11-07 00:49:27,548 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-11-07 00:49:27,548 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-11-07 00:49:27,549 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-11-07 00:49:27,549 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-11-07 00:49:27,549 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-11-07 00:49:27,549 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-11-07 00:49:27,549 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-11-07 00:49:27,549 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-11-07 00:49:27,550 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-11-07 00:49:27,550 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-11-07 00:49:27,550 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-11-07 00:49:27,550 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-11-07 00:49:27,550 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-11-07 00:49:27,550 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-11-07 00:49:27,550 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-11-07 00:49:27,551 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-11-07 00:49:27,551 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-11-07 00:49:27,551 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-11-07 00:49:27,551 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-11-07 00:49:27,551 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-11-07 00:49:27,551 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-11-07 00:49:27,552 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-11-07 00:49:27,552 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-11-07 00:49:27,552 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-11-07 00:49:27,552 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-11-07 00:49:27,552 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-11-07 00:49:27,553 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-11-07 00:49:27,553 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-11-07 00:49:27,553 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-11-07 00:49:27,553 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-11-07 00:49:27,553 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-11-07 00:49:27,553 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-11-07 00:49:27,554 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-11-07 00:49:27,554 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-11-07 00:49:27,554 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-11-07 00:49:27,554 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-11-07 00:49:27,554 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-11-07 00:49:27,555 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-11-07 00:49:27,555 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-11-07 00:49:27,555 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-11-07 00:49:27,555 INFO  L130     BoogieDeclarations]: Found specification of procedure cfree
[2020-11-07 00:49:27,555 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-11-07 00:49:27,555 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-11-07 00:49:27,556 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-11-07 00:49:27,556 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-11-07 00:49:27,556 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-11-07 00:49:27,556 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-11-07 00:49:27,556 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-11-07 00:49:27,556 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-11-07 00:49:27,556 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-11-07 00:49:27,557 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-11-07 00:49:27,557 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-11-07 00:49:27,557 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-11-07 00:49:27,557 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-11-07 00:49:27,557 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-11-07 00:49:27,557 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-11-07 00:49:27,558 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-11-07 00:49:27,558 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-11-07 00:49:27,558 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-11-07 00:49:27,558 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-11-07 00:49:27,558 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-11-07 00:49:27,558 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-11-07 00:49:27,558 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-11-07 00:49:27,559 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-11-07 00:49:27,559 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-11-07 00:49:27,559 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-11-07 00:49:27,559 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-11-07 00:49:27,559 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-11-07 00:49:27,559 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-11-07 00:49:27,560 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-11-07 00:49:27,560 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-11-07 00:49:27,560 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-11-07 00:49:27,560 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-11-07 00:49:27,560 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-11-07 00:49:27,560 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-11-07 00:49:27,561 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-11-07 00:49:27,561 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-11-07 00:49:27,561 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-11-07 00:49:27,561 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-11-07 00:49:27,561 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-11-07 00:49:27,561 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-11-07 00:49:27,561 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-11-07 00:49:27,562 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-11-07 00:49:27,562 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-11-07 00:49:27,562 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-11-07 00:49:27,562 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-11-07 00:49:27,562 INFO  L130     BoogieDeclarations]: Found specification of procedure fail
[2020-11-07 00:49:27,563 INFO  L130     BoogieDeclarations]: Found specification of procedure alloc_node
[2020-11-07 00:49:27,563 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-11-07 00:49:27,563 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-11-07 00:49:27,563 INFO  L130     BoogieDeclarations]: Found specification of procedure chain_node
[2020-11-07 00:49:27,563 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-11-07 00:49:27,563 INFO  L130     BoogieDeclarations]: Found specification of procedure create_sll
[2020-11-07 00:49:27,564 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~$Pointer$
[2020-11-07 00:49:27,564 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-11-07 00:49:27,564 INFO  L130     BoogieDeclarations]: Found specification of procedure init_back_link
[2020-11-07 00:49:27,564 INFO  L130     BoogieDeclarations]: Found specification of procedure reverse_dll
[2020-11-07 00:49:27,564 INFO  L130     BoogieDeclarations]: Found specification of procedure remove_fw_link
[2020-11-07 00:49:27,564 INFO  L130     BoogieDeclarations]: Found specification of procedure check_seq_next
[2020-11-07 00:49:27,565 INFO  L130     BoogieDeclarations]: Found specification of procedure check_seq_prev
[2020-11-07 00:49:27,565 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-11-07 00:49:27,565 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-11-07 00:49:27,565 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-11-07 00:49:27,565 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-11-07 00:49:27,566 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-11-07 00:49:27,566 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-11-07 00:49:28,383 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-11-07 00:49:28,383 INFO  L298             CfgBuilder]: Removed 33 assume(true) statements.
[2020-11-07 00:49:28,386 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:49:28 BoogieIcfgContainer
[2020-11-07 00:49:28,386 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-11-07 00:49:28,388 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-11-07 00:49:28,388 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-11-07 00:49:28,392 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-11-07 00:49:28,392 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:49:26" (1/3) ...
[2020-11-07 00:49:28,393 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13278c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:49:28, skipping insertion in model container
[2020-11-07 00:49:28,394 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:49:27" (2/3) ...
[2020-11-07 00:49:28,394 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13278c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:49:28, skipping insertion in model container
[2020-11-07 00:49:28,394 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:49:28" (3/3) ...
[2020-11-07 00:49:28,396 INFO  L111   eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i
[2020-11-07 00:49:28,414 INFO  L179   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-11-07 00:49:28,419 INFO  L191   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-11-07 00:49:28,433 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-11-07 00:49:28,461 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-11-07 00:49:28,461 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-11-07 00:49:28,461 INFO  L379      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2020-11-07 00:49:28,461 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-11-07 00:49:28,462 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-11-07 00:49:28,462 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-11-07 00:49:28,462 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-11-07 00:49:28,462 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-11-07 00:49:28,484 INFO  L276                IsEmpty]: Start isEmpty. Operand 218 states.
[2020-11-07 00:49:28,497 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 48
[2020-11-07 00:49:28,497 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 00:49:28,498 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-07 00:49:28,499 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 00:49:28,505 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 00:49:28,506 INFO  L82        PathProgramCache]: Analyzing trace with hash 1014782748, now seen corresponding path program 1 times
[2020-11-07 00:49:28,516 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 00:49:28,517 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110219543]
[2020-11-07 00:49:28,517 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 00:49:28,610 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 00:49:28,672 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:28,760 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-11-07 00:49:28,766 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:28,793 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13
[2020-11-07 00:49:28,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:28,825 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-07 00:49:28,827 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110219543]
[2020-11-07 00:49:28,829 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-07 00:49:28,830 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-11-07 00:49:28,830 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338862177]
[2020-11-07 00:49:28,835 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-11-07 00:49:28,835 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-11-07 00:49:28,849 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-11-07 00:49:28,850 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-11-07 00:49:28,852 INFO  L87              Difference]: Start difference. First operand 218 states. Second operand 4 states.
[2020-11-07 00:49:29,465 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-07 00:49:29,466 INFO  L93              Difference]: Finished difference Result 435 states and 587 transitions.
[2020-11-07 00:49:29,466 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-11-07 00:49:29,468 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 47
[2020-11-07 00:49:29,468 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-07 00:49:29,482 INFO  L225             Difference]: With dead ends: 435
[2020-11-07 00:49:29,482 INFO  L226             Difference]: Without dead ends: 217
[2020-11-07 00:49:29,489 INFO  L677         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
[2020-11-07 00:49:29,509 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 217 states.
[2020-11-07 00:49:29,568 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 194.
[2020-11-07 00:49:29,570 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 194 states.
[2020-11-07 00:49:29,580 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 214 transitions.
[2020-11-07 00:49:29,584 INFO  L78                 Accepts]: Start accepts. Automaton has 194 states and 214 transitions. Word has length 47
[2020-11-07 00:49:29,585 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-07 00:49:29,585 INFO  L481      AbstractCegarLoop]: Abstraction has 194 states and 214 transitions.
[2020-11-07 00:49:29,586 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-11-07 00:49:29,586 INFO  L276                IsEmpty]: Start isEmpty. Operand 194 states and 214 transitions.
[2020-11-07 00:49:29,593 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 92
[2020-11-07 00:49:29,593 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 00:49:29,593 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]
[2020-11-07 00:49:29,594 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-11-07 00:49:29,594 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 00:49:29,596 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 00:49:29,596 INFO  L82        PathProgramCache]: Analyzing trace with hash 1812534921, now seen corresponding path program 1 times
[2020-11-07 00:49:29,596 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 00:49:29,597 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032207614]
[2020-11-07 00:49:29,597 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 00:49:29,619 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 00:49:29,755 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:30,170 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-11-07 00:49:30,173 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:30,208 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13
[2020-11-07 00:49:30,243 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:30,563 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-11-07 00:49:30,571 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:30,712 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2020-11-07 00:49:30,718 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:30,841 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35
[2020-11-07 00:49:30,850 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:31,966 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2020-11-07 00:49:31,980 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:32,532 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-11-07 00:49:32,533 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032207614]
[2020-11-07 00:49:32,533 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-07 00:49:32,533 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2020-11-07 00:49:32,534 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322107819]
[2020-11-07 00:49:32,535 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 34 states
[2020-11-07 00:49:32,535 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-11-07 00:49:32,536 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2020-11-07 00:49:32,537 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122
[2020-11-07 00:49:32,537 INFO  L87              Difference]: Start difference. First operand 194 states and 214 transitions. Second operand 34 states.
[2020-11-07 00:49:33,093 WARN  L194               SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 55
[2020-11-07 00:49:33,840 WARN  L194               SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 65
[2020-11-07 00:49:34,816 WARN  L194               SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37
[2020-11-07 00:49:35,501 WARN  L194               SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 62
[2020-11-07 00:49:40,535 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-07 00:49:40,536 INFO  L93              Difference]: Finished difference Result 271 states and 306 transitions.
[2020-11-07 00:49:40,536 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. 
[2020-11-07 00:49:40,537 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states. Word has length 91
[2020-11-07 00:49:40,538 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-07 00:49:40,542 INFO  L225             Difference]: With dead ends: 271
[2020-11-07 00:49:40,542 INFO  L226             Difference]: Without dead ends: 266
[2020-11-07 00:49:40,545 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306
[2020-11-07 00:49:40,546 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 266 states.
[2020-11-07 00:49:40,596 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 211.
[2020-11-07 00:49:40,596 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 211 states.
[2020-11-07 00:49:40,598 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 233 transitions.
[2020-11-07 00:49:40,598 INFO  L78                 Accepts]: Start accepts. Automaton has 211 states and 233 transitions. Word has length 91
[2020-11-07 00:49:40,599 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-07 00:49:40,599 INFO  L481      AbstractCegarLoop]: Abstraction has 211 states and 233 transitions.
[2020-11-07 00:49:40,599 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 34 states.
[2020-11-07 00:49:40,599 INFO  L276                IsEmpty]: Start isEmpty. Operand 211 states and 233 transitions.
[2020-11-07 00:49:40,601 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 94
[2020-11-07 00:49:40,601 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 00:49:40,602 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]
[2020-11-07 00:49:40,602 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-11-07 00:49:40,602 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 00:49:40,603 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 00:49:40,603 INFO  L82        PathProgramCache]: Analyzing trace with hash -2112971725, now seen corresponding path program 1 times
[2020-11-07 00:49:40,603 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 00:49:40,603 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840864833]
[2020-11-07 00:49:40,604 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 00:49:40,610 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 00:49:40,644 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:40,782 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-11-07 00:49:40,788 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:40,836 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13
[2020-11-07 00:49:40,864 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:41,347 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4
[2020-11-07 00:49:41,354 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:41,523 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2020-11-07 00:49:41,528 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:41,636 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35
[2020-11-07 00:49:41,643 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:42,592 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1
[2020-11-07 00:49:42,598 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 00:49:43,157 INFO  L134       CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-11-07 00:49:43,159 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840864833]
[2020-11-07 00:49:43,159 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-07 00:49:43,159 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34
[2020-11-07 00:49:43,160 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376468792]
[2020-11-07 00:49:43,160 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 34 states
[2020-11-07 00:49:43,161 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-11-07 00:49:43,161 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.
[2020-11-07 00:49:43,162 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122
[2020-11-07 00:49:43,162 INFO  L87              Difference]: Start difference. First operand 211 states and 233 transitions. Second operand 34 states.
[2020-11-07 00:49:44,460 WARN  L194               SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 56
[2020-11-07 00:49:51,720 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-07 00:49:51,720 INFO  L93              Difference]: Finished difference Result 281 states and 319 transitions.
[2020-11-07 00:49:51,721 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. 
[2020-11-07 00:49:51,721 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states. Word has length 93
[2020-11-07 00:49:51,722 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-07 00:49:51,726 INFO  L225             Difference]: With dead ends: 281
[2020-11-07 00:49:51,726 INFO  L226             Difference]: Without dead ends: 276
[2020-11-07 00:49:51,729 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=283, Invalid=3499, Unknown=0, NotChecked=0, Total=3782
[2020-11-07 00:49:51,729 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 276 states.
[2020-11-07 00:49:51,776 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 211.
[2020-11-07 00:49:51,776 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 211 states.
[2020-11-07 00:49:51,778 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 232 transitions.
[2020-11-07 00:49:51,778 INFO  L78                 Accepts]: Start accepts. Automaton has 211 states and 232 transitions. Word has length 93
[2020-11-07 00:49:51,779 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-07 00:49:51,779 INFO  L481      AbstractCegarLoop]: Abstraction has 211 states and 232 transitions.
[2020-11-07 00:49:51,779 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 34 states.
[2020-11-07 00:49:51,779 INFO  L276                IsEmpty]: Start isEmpty. Operand 211 states and 232 transitions.
[2020-11-07 00:49:51,781 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 100
[2020-11-07 00:49:51,781 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 00:49:51,781 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, 1, 1, 1, 1, 1, 1]
[2020-11-07 00:49:51,782 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-11-07 00:49:51,782 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 00:49:51,782 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 00:49:51,782 INFO  L82        PathProgramCache]: Analyzing trace with hash -1195292928, now seen corresponding path program 1 times
[2020-11-07 00:49:51,783 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 00:49:51,783 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961146166]
[2020-11-07 00:49:51,783 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 00:49:51,790 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 00:49:51,826 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-11-07 00:49:51,827 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-11-07 00:49:51,858 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-11-07 00:49:51,858 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-11-07 00:49:51,905 INFO  L173   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-11-07 00:49:51,905 INFO  L523         BasicCegarLoop]: Counterexample might be feasible
[2020-11-07 00:49:51,906 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-11-07 00:49:51,928 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:49:51 BoogieIcfgContainer
[2020-11-07 00:49:51,928 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-11-07 00:49:51,930 INFO  L168              Benchmark]: Toolchain (without parser) took 25183.89 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 106.1 MB in the beginning and 197.5 MB in the end (delta: -91.4 MB). Peak memory consumption was 86.3 MB. Max. memory is 8.0 GB.
[2020-11-07 00:49:51,931 INFO  L168              Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2020-11-07 00:49:51,932 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 616.40 ms. Allocated memory is still 151.0 MB. Free memory was 105.4 MB in the beginning and 121.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
[2020-11-07 00:49:51,933 INFO  L168              Benchmark]: Boogie Preprocessor took 83.18 ms. Allocated memory is still 151.0 MB. Free memory was 121.3 MB in the beginning and 117.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB.
[2020-11-07 00:49:51,934 INFO  L168              Benchmark]: RCFGBuilder took 928.01 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 103.4 MB in the end (delta: 14.5 MB). Peak memory consumption was 50.2 MB. Max. memory is 8.0 GB.
[2020-11-07 00:49:51,935 INFO  L168              Benchmark]: TraceAbstraction took 23540.45 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 102.9 MB in the beginning and 197.5 MB in the end (delta: -94.6 MB). Peak memory consumption was 81.5 MB. Max. memory is 8.0 GB.
[2020-11-07 00:49:51,938 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.3 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 616.40 ms. Allocated memory is still 151.0 MB. Free memory was 105.4 MB in the beginning and 121.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 83.18 ms. Allocated memory is still 151.0 MB. Free memory was 121.3 MB in the beginning and 117.9 MB in the end (delta: 3.4 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 928.01 ms. Allocated memory is still 151.0 MB. Free memory was 117.9 MB in the beginning and 103.4 MB in the end (delta: 14.5 MB). Peak memory consumption was 50.2 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 23540.45 ms. Allocated memory was 151.0 MB in the beginning and 327.2 MB in the end (delta: 176.2 MB). Free memory was 102.9 MB in the beginning and 197.5 MB in the end (delta: -94.6 MB). Peak memory consumption was 81.5 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L639]              const struct node *p1, *p2;
[L640]  CALL, EXPR  create_sll(&p1, &p2)
[L588]              struct node *list = ((void *)0);
[L590]  CALL        chain_node(&list)
[L582]  CALL, EXPR  alloc_node()
[L573]              struct node *ptr = malloc(sizeof *ptr);
[L574]  COND FALSE  !(!ptr)
[L576]              ptr->next = ((void *)0)
[L577]              ptr->prev = ((void *)0)
[L578]              return ptr;
[L582]  RET, EXPR   alloc_node()
[L582]              struct node *node = alloc_node();
[L583]  EXPR        \read(**ppnode)
[L583]              node->next = *ppnode
[L584]              *ppnode = node
[L590]  RET         chain_node(&list)
[L591]  COND FALSE  !(__VERIFIER_nondet_int())
[L592]  EXPR        \read(*list)
[L592]              *pp2 = list
[L593]  COND FALSE  !(__VERIFIER_nondet_int())
[L595]  EXPR        \read(*list)
[L595]              *pp1 = list
[L597]  CALL        chain_node(&list)
[L582]  CALL, EXPR  alloc_node()
[L573]              struct node *ptr = malloc(sizeof *ptr);
[L574]  COND FALSE  !(!ptr)
[L576]              ptr->next = ((void *)0)
[L577]              ptr->prev = ((void *)0)
[L578]              return ptr;
[L582]  RET, EXPR   alloc_node()
[L582]              struct node *node = alloc_node();
[L583]  EXPR        \read(**ppnode)
[L583]              node->next = *ppnode
[L584]              *ppnode = node
[L597]  RET         chain_node(&list)
[L598]  COND FALSE  !(__VERIFIER_nondet_int())
[L599]  EXPR        \read(*list)
[L599]              return list;
[L588]              struct node *list = ((void *)0);
[L599]              return list;
[L640]  RET, EXPR   create_sll(&p1, &p2)
[L640]              struct node *list = create_sll(&p1, &p2);
[L642]  EXPR        \read(*p1)
[L642]  EXPR        \read(*p2)
[L642]  CALL        check_seq_next(p1, p2)
[L626]  COND FALSE  !(!(beg))
[L627]  COND FALSE  !(!(end))
[L628]  EXPR        beg->next
[L628]              beg = beg->next
[L628]  COND TRUE   end != beg
[L629]  COND TRUE   !(beg)
[L629]  CALL        fail()
[L565]  CALL        reach_error()
[L12]   COND FALSE  !(0)
[L12]               __assert_fail ("0", "sll_to_dll_rev-1.c", 3, __extension__ __PRETTY_FUNCTION__)

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 15 procedures, 228 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 17.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 544 SDtfs, 1045 SDslu, 3423 SDs, 0 SdLazy, 9015 SolverSat, 327 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 144 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 9.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=218occurred 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, 143 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...