/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/splice-1.i


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


This is Ultimate 0.1.25-177f698
[2020-08-21 13:19:37,291 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-21 13:19:37,293 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-21 13:19:37,328 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-21 13:19:37,328 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-21 13:19:37,336 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-21 13:19:37,338 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-21 13:19:37,340 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-21 13:19:37,343 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-21 13:19:37,345 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-21 13:19:37,346 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-21 13:19:37,349 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-21 13:19:37,349 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-21 13:19:37,351 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-21 13:19:37,353 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-21 13:19:37,354 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-21 13:19:37,355 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-21 13:19:37,358 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-21 13:19:37,360 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-21 13:19:37,364 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-21 13:19:37,366 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-21 13:19:37,368 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-21 13:19:37,369 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-21 13:19:37,370 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-21 13:19:37,380 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-21 13:19:37,380 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-21 13:19:37,380 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-21 13:19:37,381 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-21 13:19:37,381 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-21 13:19:37,382 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-21 13:19:37,382 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-21 13:19:37,383 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-21 13:19:37,383 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-21 13:19:37,384 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-21 13:19:37,385 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-21 13:19:37,385 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-21 13:19:37,386 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-21 13:19:37,386 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-21 13:19:37,386 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-21 13:19:37,387 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-21 13:19:37,387 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-21 13:19:37,388 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-08-21 13:19:37,409 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-21 13:19:37,409 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-21 13:19:37,410 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-21 13:19:37,410 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-21 13:19:37,410 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-21 13:19:37,411 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-21 13:19:37,411 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-21 13:19:37,411 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-21 13:19:37,411 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-21 13:19:37,411 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-21 13:19:37,412 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-21 13:19:37,412 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-21 13:19:37,412 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-21 13:19:37,412 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-21 13:19:37,412 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-21 13:19:37,412 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-21 13:19:37,413 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-21 13:19:37,413 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-21 13:19:37,413 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-21 13:19:37,413 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-21 13:19:37,413 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-21 13:19:37,414 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 13:19:37,414 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-21 13:19:37,414 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-21 13:19:37,414 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-21 13:19:37,414 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-21 13:19:37,415 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-21 13:19:37,415 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-21 13:19:37,415 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-21 13:19:37,415 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false
[2020-08-21 13:19:37,710 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-21 13:19:37,729 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-21 13:19:37,732 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-21 13:19:37,734 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-21 13:19:37,734 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-21 13:19:37,735 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/splice-1.i
[2020-08-21 13:19:37,803 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84bf64800/8fa701e055ee4b84bd93506fcafb208d/FLAGd4e74b809
[2020-08-21 13:19:38,312 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-21 13:19:38,313 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/splice-1.i
[2020-08-21 13:19:38,325 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84bf64800/8fa701e055ee4b84bd93506fcafb208d/FLAGd4e74b809
[2020-08-21 13:19:38,630 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84bf64800/8fa701e055ee4b84bd93506fcafb208d
[2020-08-21 13:19:38,638 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-21 13:19:38,639 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-21 13:19:38,640 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-21 13:19:38,640 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-21 13:19:38,644 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-21 13:19:38,645 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:38" (1/1) ...
[2020-08-21 13:19:38,651 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30380f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:38, skipping insertion in model container
[2020-08-21 13:19:38,651 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:38" (1/1) ...
[2020-08-21 13:19:38,660 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-21 13:19:38,716 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-21 13:19:39,130 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 13:19:39,140 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-21 13:19:39,181 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-21 13:19:39,235 INFO  L208         MainTranslator]: Completed translation
[2020-08-21 13:19:39,236 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39 WrapperNode
[2020-08-21 13:19:39,236 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-21 13:19:39,237 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-21 13:19:39,237 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-21 13:19:39,237 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-21 13:19:39,251 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39" (1/1) ...
[2020-08-21 13:19:39,251 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39" (1/1) ...
[2020-08-21 13:19:39,267 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39" (1/1) ...
[2020-08-21 13:19:39,267 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39" (1/1) ...
[2020-08-21 13:19:39,284 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39" (1/1) ...
[2020-08-21 13:19:39,290 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39" (1/1) ...
[2020-08-21 13:19:39,293 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39" (1/1) ...
[2020-08-21 13:19:39,299 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-21 13:19:39,299 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-21 13:19:39,299 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-21 13:19:39,299 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-21 13:19:39,300 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39" (1/1) ...
No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-21 13:19:39,370 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-21 13:19:39,370 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-21 13:19:39,370 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-08-21 13:19:39,371 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-08-21 13:19:39,371 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint16_identity
[2020-08-21 13:19:39,371 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint32_identity
[2020-08-21 13:19:39,372 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint64_identity
[2020-08-21 13:19:39,373 INFO  L138     BoogieDeclarations]: Found implementation of procedure myexit
[2020-08-21 13:19:39,373 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-21 13:19:39,373 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-21 13:19:39,373 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-21 13:19:39,374 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-08-21 13:19:39,374 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-08-21 13:19:39,374 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-08-21 13:19:39,374 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-08-21 13:19:39,375 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-08-21 13:19:39,375 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-08-21 13:19:39,375 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-08-21 13:19:39,376 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-08-21 13:19:39,376 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-08-21 13:19:39,376 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-08-21 13:19:39,377 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-08-21 13:19:39,377 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-08-21 13:19:39,377 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-08-21 13:19:39,378 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-08-21 13:19:39,379 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-08-21 13:19:39,379 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-08-21 13:19:39,379 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-08-21 13:19:39,379 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-08-21 13:19:39,380 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint16_identity
[2020-08-21 13:19:39,380 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint32_identity
[2020-08-21 13:19:39,380 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint64_identity
[2020-08-21 13:19:39,380 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-08-21 13:19:39,380 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-08-21 13:19:39,381 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-08-21 13:19:39,381 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-08-21 13:19:39,381 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-08-21 13:19:39,381 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-08-21 13:19:39,381 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-08-21 13:19:39,382 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-08-21 13:19:39,382 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-08-21 13:19:39,382 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-08-21 13:19:39,382 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-08-21 13:19:39,382 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-08-21 13:19:39,382 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-08-21 13:19:39,382 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-08-21 13:19:39,382 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-08-21 13:19:39,383 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-08-21 13:19:39,383 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-08-21 13:19:39,383 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-08-21 13:19:39,383 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-08-21 13:19:39,383 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-08-21 13:19:39,383 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-08-21 13:19:39,383 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-08-21 13:19:39,384 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-08-21 13:19:39,384 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-08-21 13:19:39,384 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-08-21 13:19:39,384 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-08-21 13:19:39,384 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-08-21 13:19:39,384 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-08-21 13:19:39,384 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-08-21 13:19:39,385 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-08-21 13:19:39,385 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-08-21 13:19:39,385 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-08-21 13:19:39,385 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-08-21 13:19:39,385 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-08-21 13:19:39,385 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-08-21 13:19:39,386 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-08-21 13:19:39,386 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-08-21 13:19:39,386 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-08-21 13:19:39,386 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-08-21 13:19:39,386 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-08-21 13:19:39,386 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-08-21 13:19:39,386 INFO  L130     BoogieDeclarations]: Found specification of procedure aligned_alloc
[2020-08-21 13:19:39,387 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-21 13:19:39,387 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-08-21 13:19:39,387 INFO  L130     BoogieDeclarations]: Found specification of procedure at_quick_exit
[2020-08-21 13:19:39,387 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-08-21 13:19:39,387 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-08-21 13:19:39,387 INFO  L130     BoogieDeclarations]: Found specification of procedure quick_exit
[2020-08-21 13:19:39,387 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-08-21 13:19:39,388 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-08-21 13:19:39,388 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-08-21 13:19:39,388 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-08-21 13:19:39,388 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-08-21 13:19:39,388 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-08-21 13:19:39,388 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-08-21 13:19:39,389 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-08-21 13:19:39,389 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-08-21 13:19:39,389 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-08-21 13:19:39,389 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-08-21 13:19:39,389 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-08-21 13:19:39,389 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-08-21 13:19:39,389 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-08-21 13:19:39,390 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-08-21 13:19:39,391 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-08-21 13:19:39,392 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-08-21 13:19:39,392 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-08-21 13:19:39,392 INFO  L130     BoogieDeclarations]: Found specification of procedure myexit
[2020-08-21 13:19:39,392 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-21 13:19:39,392 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-08-21 13:19:39,392 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-08-21 13:19:39,393 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-08-21 13:19:39,393 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-08-21 13:19:39,393 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-08-21 13:19:39,393 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-21 13:19:39,393 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-21 13:19:39,393 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-08-21 13:19:39,770 INFO  L732   $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true;
[2020-08-21 13:19:39,946 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-21 13:19:39,946 INFO  L295             CfgBuilder]: Removed 4 assume(true) statements.
[2020-08-21 13:19:39,950 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:39 BoogieIcfgContainer
[2020-08-21 13:19:39,950 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-21 13:19:39,952 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-21 13:19:39,952 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-21 13:19:39,955 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-21 13:19:39,955 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:19:38" (1/3) ...
[2020-08-21 13:19:39,956 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a879c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:39, skipping insertion in model container
[2020-08-21 13:19:39,956 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:39" (2/3) ...
[2020-08-21 13:19:39,956 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a879c74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:39, skipping insertion in model container
[2020-08-21 13:19:39,957 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:39" (3/3) ...
[2020-08-21 13:19:39,958 INFO  L109   eAbstractionObserver]: Analyzing ICFG splice-1.i
[2020-08-21 13:19:39,969 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-21 13:19:39,976 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-21 13:19:39,991 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-21 13:19:40,015 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-21 13:19:40,015 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-21 13:19:40,015 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-21 13:19:40,015 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-21 13:19:40,016 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-21 13:19:40,016 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-21 13:19:40,016 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-21 13:19:40,016 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-21 13:19:40,035 INFO  L276                IsEmpty]: Start isEmpty. Operand 36 states.
[2020-08-21 13:19:40,041 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-08-21 13:19:40,041 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:19:40,042 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 13:19:40,043 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:19:40,048 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:19:40,049 INFO  L82        PathProgramCache]: Analyzing trace with hash 661731879, now seen corresponding path program 1 times
[2020-08-21 13:19:40,058 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:19:40,058 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846464835]
[2020-08-21 13:19:40,059 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:19:40,168 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:19:40,232 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:19:40,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:19:40,247 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:19:40,248 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846464835]
[2020-08-21 13:19:40,250 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:19:40,250 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-21 13:19:40,251 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183489440]
[2020-08-21 13:19:40,257 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-21 13:19:40,257 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:19:40,270 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-21 13:19:40,271 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-21 13:19:40,273 INFO  L87              Difference]: Start difference. First operand 36 states. Second operand 3 states.
[2020-08-21 13:19:40,384 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:19:40,384 INFO  L93              Difference]: Finished difference Result 54 states and 77 transitions.
[2020-08-21 13:19:40,398 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-21 13:19:40,400 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 16
[2020-08-21 13:19:40,400 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:19:40,409 INFO  L225             Difference]: With dead ends: 54
[2020-08-21 13:19:40,409 INFO  L226             Difference]: Without dead ends: 27
[2020-08-21 13:19:40,412 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
[2020-08-21 13:19:40,432 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2020-08-21 13:19:40,449 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27.
[2020-08-21 13:19:40,450 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 27 states.
[2020-08-21 13:19:40,451 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions.
[2020-08-21 13:19:40,453 INFO  L78                 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 16
[2020-08-21 13:19:40,453 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:19:40,453 INFO  L479      AbstractCegarLoop]: Abstraction has 27 states and 33 transitions.
[2020-08-21 13:19:40,454 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-21 13:19:40,454 INFO  L276                IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions.
[2020-08-21 13:19:40,455 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 19
[2020-08-21 13:19:40,455 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:19:40,455 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-21 13:19:40,455 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-21 13:19:40,456 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:19:40,456 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:19:40,456 INFO  L82        PathProgramCache]: Analyzing trace with hash 1973627133, now seen corresponding path program 1 times
[2020-08-21 13:19:40,456 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:19:40,457 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720839157]
[2020-08-21 13:19:40,457 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:19:40,485 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:19:40,561 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:19:40,565 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:19:40,576 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:19:40,577 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720839157]
[2020-08-21 13:19:40,577 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:19:40,577 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 13:19:40,577 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528931205]
[2020-08-21 13:19:40,582 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 13:19:40,583 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:19:40,583 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 13:19:40,583 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 13:19:40,583 INFO  L87              Difference]: Start difference. First operand 27 states and 33 transitions. Second operand 5 states.
[2020-08-21 13:19:40,712 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:19:40,713 INFO  L93              Difference]: Finished difference Result 44 states and 55 transitions.
[2020-08-21 13:19:40,715 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-21 13:19:40,715 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 18
[2020-08-21 13:19:40,715 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:19:40,716 INFO  L225             Difference]: With dead ends: 44
[2020-08-21 13:19:40,716 INFO  L226             Difference]: Without dead ends: 37
[2020-08-21 13:19:40,718 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 13:19:40,720 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2020-08-21 13:19:40,729 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32.
[2020-08-21 13:19:40,729 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-08-21 13:19:40,730 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions.
[2020-08-21 13:19:40,731 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 18
[2020-08-21 13:19:40,732 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:19:40,732 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 40 transitions.
[2020-08-21 13:19:40,732 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 13:19:40,732 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions.
[2020-08-21 13:19:40,733 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-08-21 13:19:40,734 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:19:40,734 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]
[2020-08-21 13:19:40,734 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-21 13:19:40,734 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:19:40,735 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:19:40,735 INFO  L82        PathProgramCache]: Analyzing trace with hash -1721544590, now seen corresponding path program 1 times
[2020-08-21 13:19:40,735 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:19:40,735 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544350929]
[2020-08-21 13:19:40,736 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:19:40,780 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:19:40,826 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:19:40,828 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:19:40,833 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:19:40,834 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544350929]
[2020-08-21 13:19:40,834 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:19:40,834 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-08-21 13:19:40,834 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176653131]
[2020-08-21 13:19:40,835 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-08-21 13:19:40,835 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:19:40,835 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-08-21 13:19:40,836 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-08-21 13:19:40,836 INFO  L87              Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 5 states.
[2020-08-21 13:19:40,937 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:19:40,937 INFO  L93              Difference]: Finished difference Result 51 states and 64 transitions.
[2020-08-21 13:19:40,937 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-21 13:19:40,937 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 20
[2020-08-21 13:19:40,938 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:19:40,940 INFO  L225             Difference]: With dead ends: 51
[2020-08-21 13:19:40,940 INFO  L226             Difference]: Without dead ends: 43
[2020-08-21 13:19:40,941 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-08-21 13:19:40,942 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 43 states.
[2020-08-21 13:19:40,948 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41.
[2020-08-21 13:19:40,948 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2020-08-21 13:19:40,950 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 53 transitions.
[2020-08-21 13:19:40,950 INFO  L78                 Accepts]: Start accepts. Automaton has 41 states and 53 transitions. Word has length 20
[2020-08-21 13:19:40,950 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:19:40,950 INFO  L479      AbstractCegarLoop]: Abstraction has 41 states and 53 transitions.
[2020-08-21 13:19:40,950 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-08-21 13:19:40,951 INFO  L276                IsEmpty]: Start isEmpty. Operand 41 states and 53 transitions.
[2020-08-21 13:19:40,951 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 22
[2020-08-21 13:19:40,952 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:19:40,952 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]
[2020-08-21 13:19:40,952 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-21 13:19:40,952 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:19:40,952 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:19:40,953 INFO  L82        PathProgramCache]: Analyzing trace with hash -918584693, now seen corresponding path program 1 times
[2020-08-21 13:19:40,953 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:19:40,953 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1621765597]
[2020-08-21 13:19:40,953 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:19:40,973 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:19:41,029 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-21 13:19:41,031 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-21 13:19:41,035 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-21 13:19:41,036 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1621765597]
[2020-08-21 13:19:41,036 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-21 13:19:41,036 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-08-21 13:19:41,036 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405759432]
[2020-08-21 13:19:41,037 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-08-21 13:19:41,037 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-21 13:19:41,037 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-08-21 13:19:41,038 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-08-21 13:19:41,038 INFO  L87              Difference]: Start difference. First operand 41 states and 53 transitions. Second operand 7 states.
[2020-08-21 13:19:41,181 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-21 13:19:41,182 INFO  L93              Difference]: Finished difference Result 74 states and 98 transitions.
[2020-08-21 13:19:41,182 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-08-21 13:19:41,182 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 21
[2020-08-21 13:19:41,183 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-21 13:19:41,183 INFO  L225             Difference]: With dead ends: 74
[2020-08-21 13:19:41,184 INFO  L226             Difference]: Without dead ends: 47
[2020-08-21 13:19:41,184 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72
[2020-08-21 13:19:41,185 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 47 states.
[2020-08-21 13:19:41,190 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43.
[2020-08-21 13:19:41,191 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 43 states.
[2020-08-21 13:19:41,192 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 55 transitions.
[2020-08-21 13:19:41,192 INFO  L78                 Accepts]: Start accepts. Automaton has 43 states and 55 transitions. Word has length 21
[2020-08-21 13:19:41,192 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-21 13:19:41,192 INFO  L479      AbstractCegarLoop]: Abstraction has 43 states and 55 transitions.
[2020-08-21 13:19:41,193 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-08-21 13:19:41,193 INFO  L276                IsEmpty]: Start isEmpty. Operand 43 states and 55 transitions.
[2020-08-21 13:19:41,194 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-08-21 13:19:41,194 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-21 13:19:41,194 INFO  L422         BasicCegarLoop]: trace histogram [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]
[2020-08-21 13:19:41,194 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-21 13:19:41,194 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-21 13:19:41,195 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-21 13:19:41,195 INFO  L82        PathProgramCache]: Analyzing trace with hash -743556192, now seen corresponding path program 1 times
[2020-08-21 13:19:41,195 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-21 13:19:41,195 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660356234]
[2020-08-21 13:19:41,196 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-21 13:19:41,236 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-21 13:19:41,242 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-21 13:19:41,243 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-21 13:19:41,251 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-21 13:19:41,272 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:19:41 BoogieIcfgContainer
[2020-08-21 13:19:41,272 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-21 13:19:41,276 INFO  L168              Benchmark]: Toolchain (without parser) took 2635.08 ms. Allocated memory was 140.5 MB in the beginning and 234.4 MB in the end (delta: 93.8 MB). Free memory was 101.8 MB in the beginning and 119.5 MB in the end (delta: -17.7 MB). Peak memory consumption was 76.1 MB. Max. memory is 7.1 GB.
[2020-08-21 13:19:41,278 INFO  L168              Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
[2020-08-21 13:19:41,280 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 596.34 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 168.9 MB in the end (delta: -67.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB.
[2020-08-21 13:19:41,281 INFO  L168              Benchmark]: Boogie Preprocessor took 62.07 ms. Allocated memory is still 203.4 MB. Free memory was 168.9 MB in the beginning and 166.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB.
[2020-08-21 13:19:41,287 INFO  L168              Benchmark]: RCFGBuilder took 651.27 ms. Allocated memory is still 203.4 MB. Free memory was 166.2 MB in the beginning and 120.0 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB.
[2020-08-21 13:19:41,288 INFO  L168              Benchmark]: TraceAbstraction took 1320.98 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 119.3 MB in the beginning and 119.5 MB in the end (delta: -189.7 kB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB.
[2020-08-21 13:19:41,297 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.17 ms. Allocated memory is still 140.5 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 596.34 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 101.6 MB in the beginning and 168.9 MB in the end (delta: -67.4 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 62.07 ms. Allocated memory is still 203.4 MB. Free memory was 168.9 MB in the beginning and 166.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 651.27 ms. Allocated memory is still 203.4 MB. Free memory was 166.2 MB in the beginning and 120.0 MB in the end (delta: 46.3 MB). Peak memory consumption was 46.3 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1320.98 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 119.3 MB in the beginning and 119.5 MB in the end (delta: -189.7 kB). Peak memory consumption was 30.7 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 573]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L521]              int flag = 1;
[L522]              List a = (List) malloc(sizeof(struct node));
[L523]  COND FALSE  !(a == 0)
[L524]              List t;
[L525]              List l1;
[L526]              List l2;
[L527]              List b;
[L528]              List u;
[L529]              List p = a;
[L530]  COND TRUE   __VERIFIER_nondet_int()
[L531]  COND TRUE   \read(flag)
[L532]              p->h = 1
[L533]              flag = 0
[L538]              t = (List) malloc(sizeof(struct node))
[L539]  COND FALSE  !(t == 0)
[L540]              p->n = t
[L541]  EXPR        p->n
[L541]              p = p->n
[L530]  COND FALSE  !(__VERIFIER_nondet_int())
[L543]              p->h = 3
[L544]  EXPR        a->h
[L544]  COND FALSE  !(a->h == 3)
[L545]              flag = 1
[L546]              l1 = 0
[L547]              l2 = 0
[L548]              p = a
[L549]  EXPR        p->h
[L549]  COND TRUE   p->h != 3
[L550]              t = p
[L551]  EXPR        p->n
[L551]              p = p->n
[L552]  COND TRUE   \read(flag)
[L553]              t->n = l1
[L554]              l1 = t
[L555]              flag = 0
[L549]  EXPR        p->h
[L549]  COND FALSE  !(p->h != 3)
[L562]              p = l1
[L563]  COND TRUE   p != 0
[L564]  EXPR        p->h
[L564]  COND TRUE   p->h != 2
[L573]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 9 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 124 SDtfs, 28 SDslu, 164 SDs, 0 SdLazy, 245 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 11 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 71 ConstructedInterpolants, 0 QuantifiedInterpolants, 3646 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 2/2 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...