/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i


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


This is Ultimate 0.1.25-72570d3
[2020-08-22 16:39:03,488 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-22 16:39:03,490 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-22 16:39:03,515 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-22 16:39:03,516 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-22 16:39:03,517 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-22 16:39:03,518 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-08-22 16:39:03,522 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-22 16:39:03,523 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-22 16:39:03,524 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-22 16:39:03,524 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-22 16:39:03,526 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-22 16:39:03,526 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-22 16:39:03,528 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-22 16:39:03,528 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-22 16:39:03,529 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-22 16:39:03,531 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-22 16:39:03,533 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-22 16:39:03,534 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-22 16:39:03,535 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-22 16:39:03,536 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
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[2020-08-22 16:39:03,539 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2020-08-22 16:39:03,540 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-22 16:39:03,540 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
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[2020-08-22 16:39:03,542 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-22 16:39:03,542 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-08-22 16:39:03,545 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
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[2020-08-22 16:39:03,546 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-08-22 16:39:03,548 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-22 16:39:03,549 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-22 16:39:03,599 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-22 16:39:03,600 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-22 16:39:03,601 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-22 16:39:03,601 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-22 16:39:03,601 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-22 16:39:03,602 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-22 16:39:03,602 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-22 16:39:03,602 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-22 16:39:03,603 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-22 16:39:03,603 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-22 16:39:03,603 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-22 16:39:03,603 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-22 16:39:03,603 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-22 16:39:03,604 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-22 16:39:03,604 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-22 16:39:03,604 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-22 16:39:03,604 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-22 16:39:03,604 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-22 16:39:03,605 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-22 16:39:03,606 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-22 16:39:03,607 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-22 16:39:03,607 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-22 16:39:03,607 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-22 16:39:03,607 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-22 16:39:03,607 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-22 16:39:03,607 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-22 16:39:03,608 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-22 16:39:03,608 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-22 16:39:03,608 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-22 16:39:03,608 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
[2020-08-22 16:39:03,921 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-22 16:39:03,941 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-22 16:39:03,944 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-22 16:39:03,946 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-22 16:39:03,946 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-22 16:39:03,947 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i
[2020-08-22 16:39:04,025 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee6a5555/e1f52261d248406a9521c3c13ad5b605/FLAG872355dee
[2020-08-22 16:39:04,581 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-22 16:39:04,582 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i
[2020-08-22 16:39:04,606 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee6a5555/e1f52261d248406a9521c3c13ad5b605/FLAG872355dee
[2020-08-22 16:39:04,918 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ee6a5555/e1f52261d248406a9521c3c13ad5b605
[2020-08-22 16:39:04,930 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-22 16:39:04,932 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-22 16:39:04,935 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-22 16:39:04,936 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-22 16:39:04,939 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-22 16:39:04,941 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:04" (1/1) ...
[2020-08-22 16:39:04,944 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70b43538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:04, skipping insertion in model container
[2020-08-22 16:39:04,944 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:39:04" (1/1) ...
[2020-08-22 16:39:04,953 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-22 16:39:05,018 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-22 16:39:05,419 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-22 16:39:05,429 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-22 16:39:05,539 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-22 16:39:05,595 INFO  L208         MainTranslator]: Completed translation
[2020-08-22 16:39:05,595 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05 WrapperNode
[2020-08-22 16:39:05,596 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-22 16:39:05,596 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-22 16:39:05,597 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-22 16:39:05,597 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-22 16:39:05,611 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05" (1/1) ...
[2020-08-22 16:39:05,611 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05" (1/1) ...
[2020-08-22 16:39:05,631 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05" (1/1) ...
[2020-08-22 16:39:05,631 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05" (1/1) ...
[2020-08-22 16:39:05,670 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05" (1/1) ...
[2020-08-22 16:39:05,686 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05" (1/1) ...
[2020-08-22 16:39:05,696 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05" (1/1) ...
[2020-08-22 16:39:05,704 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-22 16:39:05,705 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-22 16:39:05,705 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-22 16:39:05,705 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-22 16:39:05,706 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05" (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
[2020-08-22 16:39:05,763 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-22 16:39:05,763 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-22 16:39:05,763 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-08-22 16:39:05,763 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-08-22 16:39:05,764 INFO  L138     BoogieDeclarations]: Found implementation of procedure fail
[2020-08-22 16:39:05,764 INFO  L138     BoogieDeclarations]: Found implementation of procedure merge_single_node
[2020-08-22 16:39:05,764 INFO  L138     BoogieDeclarations]: Found implementation of procedure merge_pair
[2020-08-22 16:39:05,764 INFO  L138     BoogieDeclarations]: Found implementation of procedure seq_sort_core
[2020-08-22 16:39:05,764 INFO  L138     BoogieDeclarations]: Found implementation of procedure inspect_before
[2020-08-22 16:39:05,764 INFO  L138     BoogieDeclarations]: Found implementation of procedure inspect_after
[2020-08-22 16:39:05,764 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-22 16:39:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-22 16:39:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-08-22 16:39:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-08-22 16:39:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-08-22 16:39:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-08-22 16:39:05,765 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-08-22 16:39:05,766 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-08-22 16:39:05,766 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-08-22 16:39:05,766 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-08-22 16:39:05,766 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-08-22 16:39:05,766 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-08-22 16:39:05,766 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-08-22 16:39:05,766 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-08-22 16:39:05,767 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-08-22 16:39:05,767 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-08-22 16:39:05,767 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-08-22 16:39:05,767 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-08-22 16:39:05,767 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-08-22 16:39:05,767 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-08-22 16:39:05,767 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-08-22 16:39:05,768 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-08-22 16:39:05,768 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-08-22 16:39:05,768 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-08-22 16:39:05,768 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-08-22 16:39:05,768 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-08-22 16:39:05,768 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-08-22 16:39:05,769 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-08-22 16:39:05,769 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-08-22 16:39:05,769 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-08-22 16:39:05,769 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-08-22 16:39:05,769 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-08-22 16:39:05,769 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-08-22 16:39:05,769 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-08-22 16:39:05,770 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-08-22 16:39:05,770 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-08-22 16:39:05,770 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-08-22 16:39:05,770 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-08-22 16:39:05,770 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-08-22 16:39:05,770 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-08-22 16:39:05,770 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-08-22 16:39:05,771 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-08-22 16:39:05,771 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-08-22 16:39:05,771 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-08-22 16:39:05,771 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-08-22 16:39:05,771 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-08-22 16:39:05,771 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-08-22 16:39:05,771 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-08-22 16:39:05,772 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-08-22 16:39:05,772 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-08-22 16:39:05,772 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-08-22 16:39:05,772 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-08-22 16:39:05,772 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-08-22 16:39:05,772 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-08-22 16:39:05,772 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-08-22 16:39:05,773 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-08-22 16:39:05,773 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-08-22 16:39:05,773 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-08-22 16:39:05,773 INFO  L130     BoogieDeclarations]: Found specification of procedure cfree
[2020-08-22 16:39:05,773 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-08-22 16:39:05,773 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-08-22 16:39:05,773 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-08-22 16:39:05,774 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-22 16:39:05,774 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-08-22 16:39:05,774 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-08-22 16:39:05,774 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-08-22 16:39:05,774 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-08-22 16:39:05,774 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-08-22 16:39:05,775 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-08-22 16:39:05,775 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-08-22 16:39:05,775 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-08-22 16:39:05,775 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-08-22 16:39:05,775 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-08-22 16:39:05,775 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-08-22 16:39:05,776 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-08-22 16:39:05,776 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-08-22 16:39:05,776 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-08-22 16:39:05,776 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-08-22 16:39:05,776 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-08-22 16:39:05,776 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-08-22 16:39:05,777 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-08-22 16:39:05,777 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-08-22 16:39:05,777 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-08-22 16:39:05,777 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-08-22 16:39:05,777 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-08-22 16:39:05,777 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-08-22 16:39:05,778 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-08-22 16:39:05,778 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-08-22 16:39:05,778 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-08-22 16:39:05,778 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-08-22 16:39:05,778 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-08-22 16:39:05,778 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-08-22 16:39:05,778 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-08-22 16:39:05,779 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-08-22 16:39:05,779 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-08-22 16:39:05,779 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-08-22 16:39:05,779 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-08-22 16:39:05,779 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-08-22 16:39:05,779 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-08-22 16:39:05,780 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-08-22 16:39:05,780 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-08-22 16:39:05,780 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-08-22 16:39:05,780 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-08-22 16:39:05,780 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-08-22 16:39:05,780 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-22 16:39:05,780 INFO  L130     BoogieDeclarations]: Found specification of procedure fail
[2020-08-22 16:39:05,781 INFO  L130     BoogieDeclarations]: Found specification of procedure merge_single_node
[2020-08-22 16:39:05,781 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-08-22 16:39:05,781 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-08-22 16:39:05,781 INFO  L130     BoogieDeclarations]: Found specification of procedure merge_pair
[2020-08-22 16:39:05,781 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-08-22 16:39:05,782 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-08-22 16:39:05,782 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-08-22 16:39:05,782 INFO  L130     BoogieDeclarations]: Found specification of procedure seq_sort_core
[2020-08-22 16:39:05,782 INFO  L130     BoogieDeclarations]: Found specification of procedure inspect_before
[2020-08-22 16:39:05,782 INFO  L130     BoogieDeclarations]: Found specification of procedure inspect_after
[2020-08-22 16:39:05,782 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-22 16:39:05,782 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-08-22 16:39:05,783 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-08-22 16:39:05,783 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-22 16:39:05,783 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-22 16:39:06,626 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-22 16:39:06,626 INFO  L295             CfgBuilder]: Removed 33 assume(true) statements.
[2020-08-22 16:39:06,631 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:06 BoogieIcfgContainer
[2020-08-22 16:39:06,631 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-22 16:39:06,633 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-22 16:39:06,633 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-22 16:39:06,636 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-22 16:39:06,637 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:39:04" (1/3) ...
[2020-08-22 16:39:06,637 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2600fe2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:06, skipping insertion in model container
[2020-08-22 16:39:06,638 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:39:05" (2/3) ...
[2020-08-22 16:39:06,638 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2600fe2f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:39:06, skipping insertion in model container
[2020-08-22 16:39:06,638 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:39:06" (3/3) ...
[2020-08-22 16:39:06,640 INFO  L109   eAbstractionObserver]: Analyzing ICFG merge_sort-1.i
[2020-08-22 16:39:06,671 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2020-08-22 16:39:06,680 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-22 16:39:06,695 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-22 16:39:06,730 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-22 16:39:06,731 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-22 16:39:06,731 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBP
[2020-08-22 16:39:06,731 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-22 16:39:06,733 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-22 16:39:06,733 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-22 16:39:06,733 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-22 16:39:06,733 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-22 16:39:06,754 INFO  L276                IsEmpty]: Start isEmpty. Operand 115 states.
[2020-08-22 16:39:06,760 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-08-22 16:39:06,761 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 16:39:06,762 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 16:39:06,762 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 16:39:06,769 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 16:39:06,769 INFO  L82        PathProgramCache]: Analyzing trace with hash -1873878464, now seen corresponding path program 1 times
[2020-08-22 16:39:06,778 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 16:39:06,779 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210383863]
[2020-08-22 16:39:06,779 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 16:39:06,880 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:06,940 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 16:39:06,944 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:06,953 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 16:39:06,955 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210383863]
[2020-08-22 16:39:06,956 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 16:39:06,956 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-22 16:39:06,957 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176953008]
[2020-08-22 16:39:06,963 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-22 16:39:06,963 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 16:39:06,978 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-22 16:39:06,979 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-22 16:39:06,982 INFO  L87              Difference]: Start difference. First operand 115 states. Second operand 3 states.
[2020-08-22 16:39:07,235 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 16:39:07,235 INFO  L93              Difference]: Finished difference Result 240 states and 408 transitions.
[2020-08-22 16:39:07,236 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-22 16:39:07,238 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 13
[2020-08-22 16:39:07,238 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 16:39:07,252 INFO  L225             Difference]: With dead ends: 240
[2020-08-22 16:39:07,253 INFO  L226             Difference]: Without dead ends: 118
[2020-08-22 16:39:07,259 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-22 16:39:07,280 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 118 states.
[2020-08-22 16:39:07,317 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 103.
[2020-08-22 16:39:07,318 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 103 states.
[2020-08-22 16:39:07,320 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 126 transitions.
[2020-08-22 16:39:07,322 INFO  L78                 Accepts]: Start accepts. Automaton has 103 states and 126 transitions. Word has length 13
[2020-08-22 16:39:07,323 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 16:39:07,323 INFO  L479      AbstractCegarLoop]: Abstraction has 103 states and 126 transitions.
[2020-08-22 16:39:07,323 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-22 16:39:07,323 INFO  L276                IsEmpty]: Start isEmpty. Operand 103 states and 126 transitions.
[2020-08-22 16:39:07,324 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-08-22 16:39:07,324 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 16:39:07,324 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 16:39:07,325 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-22 16:39:07,325 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 16:39:07,325 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 16:39:07,326 INFO  L82        PathProgramCache]: Analyzing trace with hash -1323314826, now seen corresponding path program 1 times
[2020-08-22 16:39:07,326 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 16:39:07,326 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738169629]
[2020-08-22 16:39:07,326 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 16:39:07,362 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:07,416 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 16:39:07,421 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:07,434 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 16:39:07,435 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738169629]
[2020-08-22 16:39:07,435 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 16:39:07,435 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-22 16:39:07,436 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238018851]
[2020-08-22 16:39:07,437 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-22 16:39:07,438 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 16:39:07,438 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-22 16:39:07,438 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-22 16:39:07,438 INFO  L87              Difference]: Start difference. First operand 103 states and 126 transitions. Second operand 4 states.
[2020-08-22 16:39:07,719 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 16:39:07,720 INFO  L93              Difference]: Finished difference Result 206 states and 255 transitions.
[2020-08-22 16:39:07,723 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-08-22 16:39:07,723 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 14
[2020-08-22 16:39:07,723 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 16:39:07,727 INFO  L225             Difference]: With dead ends: 206
[2020-08-22 16:39:07,727 INFO  L226             Difference]: Without dead ends: 115
[2020-08-22 16:39:07,733 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20
[2020-08-22 16:39:07,734 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 115 states.
[2020-08-22 16:39:07,755 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105.
[2020-08-22 16:39:07,755 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 105 states.
[2020-08-22 16:39:07,759 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions.
[2020-08-22 16:39:07,759 INFO  L78                 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 14
[2020-08-22 16:39:07,760 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 16:39:07,760 INFO  L479      AbstractCegarLoop]: Abstraction has 105 states and 128 transitions.
[2020-08-22 16:39:07,760 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-22 16:39:07,760 INFO  L276                IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions.
[2020-08-22 16:39:07,765 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-08-22 16:39:07,765 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 16:39:07,766 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 16:39:07,766 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-22 16:39:07,766 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 16:39:07,767 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 16:39:07,767 INFO  L82        PathProgramCache]: Analyzing trace with hash 1684995551, now seen corresponding path program 1 times
[2020-08-22 16:39:07,767 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 16:39:07,767 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658816512]
[2020-08-22 16:39:07,768 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 16:39:07,801 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:07,885 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 16:39:07,887 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:07,894 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 16:39:07,894 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658816512]
[2020-08-22 16:39:07,895 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 16:39:07,895 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-08-22 16:39:07,895 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651277896]
[2020-08-22 16:39:07,896 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-22 16:39:07,896 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 16:39:07,897 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-22 16:39:07,897 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-08-22 16:39:07,897 INFO  L87              Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 7 states.
[2020-08-22 16:39:08,481 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 16:39:08,482 INFO  L93              Difference]: Finished difference Result 157 states and 194 transitions.
[2020-08-22 16:39:08,482 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-22 16:39:08,483 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 20
[2020-08-22 16:39:08,483 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 16:39:08,486 INFO  L225             Difference]: With dead ends: 157
[2020-08-22 16:39:08,486 INFO  L226             Difference]: Without dead ends: 152
[2020-08-22 16:39:08,487 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2020-08-22 16:39:08,489 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 152 states.
[2020-08-22 16:39:08,521 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 108.
[2020-08-22 16:39:08,521 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 108 states.
[2020-08-22 16:39:08,522 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 131 transitions.
[2020-08-22 16:39:08,522 INFO  L78                 Accepts]: Start accepts. Automaton has 108 states and 131 transitions. Word has length 20
[2020-08-22 16:39:08,523 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 16:39:08,523 INFO  L479      AbstractCegarLoop]: Abstraction has 108 states and 131 transitions.
[2020-08-22 16:39:08,523 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-22 16:39:08,523 INFO  L276                IsEmpty]: Start isEmpty. Operand 108 states and 131 transitions.
[2020-08-22 16:39:08,527 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-08-22 16:39:08,527 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 16:39:08,527 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 16:39:08,528 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-22 16:39:08,528 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 16:39:08,528 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 16:39:08,528 INFO  L82        PathProgramCache]: Analyzing trace with hash -1145945773, now seen corresponding path program 1 times
[2020-08-22 16:39:08,532 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 16:39:08,532 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138966432]
[2020-08-22 16:39:08,532 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 16:39:08,584 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:08,649 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 16:39:08,654 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:08,659 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-08-22 16:39:08,660 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138966432]
[2020-08-22 16:39:08,660 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 16:39:08,660 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-22 16:39:08,661 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536145803]
[2020-08-22 16:39:08,661 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-22 16:39:08,662 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 16:39:08,662 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-22 16:39:08,662 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-22 16:39:08,662 INFO  L87              Difference]: Start difference. First operand 108 states and 131 transitions. Second operand 6 states.
[2020-08-22 16:39:09,087 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 16:39:09,088 INFO  L93              Difference]: Finished difference Result 116 states and 141 transitions.
[2020-08-22 16:39:09,088 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-22 16:39:09,088 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 27
[2020-08-22 16:39:09,089 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 16:39:09,090 INFO  L225             Difference]: With dead ends: 116
[2020-08-22 16:39:09,090 INFO  L226             Difference]: Without dead ends: 113
[2020-08-22 16:39:09,091 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2020-08-22 16:39:09,091 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 113 states.
[2020-08-22 16:39:09,103 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 107.
[2020-08-22 16:39:09,105 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 107 states.
[2020-08-22 16:39:09,106 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 129 transitions.
[2020-08-22 16:39:09,106 INFO  L78                 Accepts]: Start accepts. Automaton has 107 states and 129 transitions. Word has length 27
[2020-08-22 16:39:09,107 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 16:39:09,107 INFO  L479      AbstractCegarLoop]: Abstraction has 107 states and 129 transitions.
[2020-08-22 16:39:09,107 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-22 16:39:09,107 INFO  L276                IsEmpty]: Start isEmpty. Operand 107 states and 129 transitions.
[2020-08-22 16:39:09,108 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-08-22 16:39:09,108 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 16:39:09,109 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 16:39:09,109 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-22 16:39:09,109 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 16:39:09,109 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 16:39:09,110 INFO  L82        PathProgramCache]: Analyzing trace with hash -1471361763, now seen corresponding path program 1 times
[2020-08-22 16:39:09,110 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 16:39:09,111 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152036165]
[2020-08-22 16:39:09,112 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 16:39:09,152 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:09,231 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 16:39:09,233 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:09,237 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-08-22 16:39:09,238 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152036165]
[2020-08-22 16:39:09,238 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 16:39:09,238 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-22 16:39:09,239 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098142567]
[2020-08-22 16:39:09,239 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-22 16:39:09,239 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 16:39:09,240 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-22 16:39:09,240 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-22 16:39:09,240 INFO  L87              Difference]: Start difference. First operand 107 states and 129 transitions. Second operand 6 states.
[2020-08-22 16:39:09,677 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 16:39:09,677 INFO  L93              Difference]: Finished difference Result 115 states and 139 transitions.
[2020-08-22 16:39:09,680 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-22 16:39:09,680 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 27
[2020-08-22 16:39:09,680 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 16:39:09,681 INFO  L225             Difference]: With dead ends: 115
[2020-08-22 16:39:09,682 INFO  L226             Difference]: Without dead ends: 112
[2020-08-22 16:39:09,682 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2020-08-22 16:39:09,686 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 112 states.
[2020-08-22 16:39:09,700 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106.
[2020-08-22 16:39:09,700 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 106 states.
[2020-08-22 16:39:09,701 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions.
[2020-08-22 16:39:09,702 INFO  L78                 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 27
[2020-08-22 16:39:09,702 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 16:39:09,702 INFO  L479      AbstractCegarLoop]: Abstraction has 106 states and 127 transitions.
[2020-08-22 16:39:09,702 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-22 16:39:09,702 INFO  L276                IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions.
[2020-08-22 16:39:09,703 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-08-22 16:39:09,703 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 16:39:09,703 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 16:39:09,704 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-22 16:39:09,704 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 16:39:09,704 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 16:39:09,704 INFO  L82        PathProgramCache]: Analyzing trace with hash 1648323131, now seen corresponding path program 1 times
[2020-08-22 16:39:09,705 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 16:39:09,705 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882874151]
[2020-08-22 16:39:09,705 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 16:39:09,722 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:09,792 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 16:39:09,793 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:09,798 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 16:39:09,798 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882874151]
[2020-08-22 16:39:09,798 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 16:39:09,798 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-08-22 16:39:09,799 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156507422]
[2020-08-22 16:39:09,799 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-08-22 16:39:09,799 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 16:39:09,800 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-08-22 16:39:09,800 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-08-22 16:39:09,800 INFO  L87              Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 9 states.
[2020-08-22 16:39:10,493 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 16:39:10,493 INFO  L93              Difference]: Finished difference Result 147 states and 177 transitions.
[2020-08-22 16:39:10,494 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-08-22 16:39:10,494 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 30
[2020-08-22 16:39:10,495 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 16:39:10,497 INFO  L225             Difference]: With dead ends: 147
[2020-08-22 16:39:10,497 INFO  L226             Difference]: Without dead ends: 144
[2020-08-22 16:39:10,497 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182
[2020-08-22 16:39:10,498 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 144 states.
[2020-08-22 16:39:10,507 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112.
[2020-08-22 16:39:10,507 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 112 states.
[2020-08-22 16:39:10,508 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 133 transitions.
[2020-08-22 16:39:10,509 INFO  L78                 Accepts]: Start accepts. Automaton has 112 states and 133 transitions. Word has length 30
[2020-08-22 16:39:10,509 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 16:39:10,509 INFO  L479      AbstractCegarLoop]: Abstraction has 112 states and 133 transitions.
[2020-08-22 16:39:10,509 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-08-22 16:39:10,509 INFO  L276                IsEmpty]: Start isEmpty. Operand 112 states and 133 transitions.
[2020-08-22 16:39:10,510 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-08-22 16:39:10,510 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 16:39:10,510 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 16:39:10,511 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-22 16:39:10,511 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 16:39:10,511 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 16:39:10,511 INFO  L82        PathProgramCache]: Analyzing trace with hash 861386650, now seen corresponding path program 1 times
[2020-08-22 16:39:10,512 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 16:39:10,512 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943115137]
[2020-08-22 16:39:10,512 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 16:39:10,524 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:10,607 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-22 16:39:10,608 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-22 16:39:10,612 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-22 16:39:10,613 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943115137]
[2020-08-22 16:39:10,613 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-22 16:39:10,613 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9
[2020-08-22 16:39:10,613 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564197432]
[2020-08-22 16:39:10,614 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 9 states
[2020-08-22 16:39:10,614 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2020-08-22 16:39:10,614 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants.
[2020-08-22 16:39:10,614 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72
[2020-08-22 16:39:10,614 INFO  L87              Difference]: Start difference. First operand 112 states and 133 transitions. Second operand 9 states.
[2020-08-22 16:39:11,233 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-22 16:39:11,234 INFO  L93              Difference]: Finished difference Result 146 states and 175 transitions.
[2020-08-22 16:39:11,234 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-08-22 16:39:11,234 INFO  L78                 Accepts]: Start accepts. Automaton has 9 states. Word has length 30
[2020-08-22 16:39:11,235 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-22 16:39:11,237 INFO  L225             Difference]: With dead ends: 146
[2020-08-22 16:39:11,237 INFO  L226             Difference]: Without dead ends: 143
[2020-08-22 16:39:11,238 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182
[2020-08-22 16:39:11,239 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 143 states.
[2020-08-22 16:39:11,246 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 118.
[2020-08-22 16:39:11,247 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 118 states.
[2020-08-22 16:39:11,247 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 139 transitions.
[2020-08-22 16:39:11,248 INFO  L78                 Accepts]: Start accepts. Automaton has 118 states and 139 transitions. Word has length 30
[2020-08-22 16:39:11,248 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-22 16:39:11,248 INFO  L479      AbstractCegarLoop]: Abstraction has 118 states and 139 transitions.
[2020-08-22 16:39:11,248 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 9 states.
[2020-08-22 16:39:11,249 INFO  L276                IsEmpty]: Start isEmpty. Operand 118 states and 139 transitions.
[2020-08-22 16:39:11,249 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-08-22 16:39:11,250 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-22 16:39:11,250 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-22 16:39:11,250 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6
[2020-08-22 16:39:11,250 INFO  L427      AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-22 16:39:11,251 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-22 16:39:11,251 INFO  L82        PathProgramCache]: Analyzing trace with hash 671486784, now seen corresponding path program 1 times
[2020-08-22 16:39:11,251 INFO  L163   FreeRefinementEngine]: Executing refinement strategy CAMEL
[2020-08-22 16:39:11,251 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601329874]
[2020-08-22 16:39:11,251 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-22 16:39:11,269 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-22 16:39:11,270 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-08-22 16:39:11,283 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-22 16:39:11,284 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-08-22 16:39:11,315 INFO  L174   FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2020-08-22 16:39:11,315 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-22 16:39:11,316 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7
[2020-08-22 16:39:11,353 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 04:39:11 BoogieIcfgContainer
[2020-08-22 16:39:11,353 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-22 16:39:11,356 INFO  L168              Benchmark]: Toolchain (without parser) took 6423.24 ms. Allocated memory was 146.3 MB in the beginning and 286.8 MB in the end (delta: 140.5 MB). Free memory was 100.7 MB in the beginning and 117.8 MB in the end (delta: -17.1 MB). Peak memory consumption was 123.4 MB. Max. memory is 7.1 GB.
[2020-08-22 16:39:11,357 INFO  L168              Benchmark]: CDTParser took 0.48 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 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.
[2020-08-22 16:39:11,358 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 660.57 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 100.5 MB in the beginning and 164.0 MB in the end (delta: -63.5 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB.
[2020-08-22 16:39:11,358 INFO  L168              Benchmark]: Boogie Preprocessor took 108.03 ms. Allocated memory is still 202.4 MB. Free memory was 164.0 MB in the beginning and 160.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB.
[2020-08-22 16:39:11,359 INFO  L168              Benchmark]: RCFGBuilder took 926.57 ms. Allocated memory is still 202.4 MB. Free memory was 160.0 MB in the beginning and 91.4 MB in the end (delta: 68.6 MB). Peak memory consumption was 68.6 MB. Max. memory is 7.1 GB.
[2020-08-22 16:39:11,360 INFO  L168              Benchmark]: TraceAbstraction took 4720.26 ms. Allocated memory was 202.4 MB in the beginning and 286.8 MB in the end (delta: 84.4 MB). Free memory was 90.7 MB in the beginning and 117.8 MB in the end (delta: -27.1 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB.
[2020-08-22 16:39:11,366 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.48 ms. Allocated memory is still 146.3 MB. Free memory was 120.9 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 660.57 ms. Allocated memory was 146.3 MB in the beginning and 202.4 MB in the end (delta: 56.1 MB). Free memory was 100.5 MB in the beginning and 164.0 MB in the end (delta: -63.5 MB). Peak memory consumption was 19.8 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 108.03 ms. Allocated memory is still 202.4 MB. Free memory was 164.0 MB in the beginning and 160.0 MB in the end (delta: 4.0 MB). Peak memory consumption was 4.0 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 926.57 ms. Allocated memory is still 202.4 MB. Free memory was 160.0 MB in the beginning and 91.4 MB in the end (delta: 68.6 MB). Peak memory consumption was 68.6 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 4720.26 ms. Allocated memory was 202.4 MB in the beginning and 286.8 MB in the end (delta: 84.4 MB). Free memory was 90.7 MB in the beginning and 117.8 MB in the end (delta: -27.1 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L627]              struct list *data = ((void *)0);
        VAL         [data={0:0}]
[L628]  COND TRUE   __VERIFIER_nondet_int()
[L629]              struct node *node = malloc(sizeof *node);
        VAL         [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}]
[L630]  COND FALSE  !(!node)
        VAL         [data={0:0}, malloc(sizeof *node)={-1:0}, node={-1:0}]
[L632]              node->next = node
[L633]              node->value = __VERIFIER_nondet_int()
[L634]              struct list *item = malloc(sizeof *item);
        VAL         [data={0:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}]
[L635]  COND FALSE  !(!item)
        VAL         [data={0:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}]
[L637]              item->slist = node
[L638]              item->next = data
[L639]              data = item
        VAL         [data={-2:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}]
[L628]  COND FALSE  !(__VERIFIER_nondet_int())
[L641]  COND FALSE  !(!data)
        VAL         [data={-2:0}, item={-2:0}, malloc(sizeof *item)={-2:0}, malloc(sizeof *node)={-1:0}, node={-1:0}]
[L643]  CALL        inspect_before(data)
        VAL         [shape={-2:0}]
[L604]  COND FALSE  !(!(shape))
        VAL         [shape={-2:0}, shape={-2:0}]
[L605]              shape->next
        VAL         [shape={-2:0}, shape={-2:0}, shape->next={0:0}]
[L605]  COND FALSE  !(shape->next)
[L611]  COND FALSE  !(!(shape))
        VAL         [shape={-2:0}, shape={-2:0}]
[L612]  EXPR        shape->next
        VAL         [shape={-2:0}, shape={-2:0}, shape->next={0:0}]
[L612]  COND FALSE  !(!(shape->next == ((void *)0)))
[L613]  EXPR        shape->slist
        VAL         [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}]
[L613]  COND FALSE  !(!(shape->slist))
[L614]  EXPR        shape->slist
[L614]  EXPR        shape->slist->next
        VAL         [shape={-2:0}, shape={-2:0}, shape->slist={-1:0}, shape->slist->next={-1:0}]
[L614]  COND TRUE   !(shape->slist->next == ((void *)0))
[L614]  CALL        fail()
[L554]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 11 procedures, 121 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 3.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 793 SDtfs, 949 SDslu, 966 SDs, 0 SdLazy, 2089 SolverSat, 220 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=118occurred in iteration=7, 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, 7 MinimizatonAttempts, 138 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 16950 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 10/10 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...