/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i
--------------------------------------------------------------------------------
This is Ultimate 0.1.25-d623d84
[2020-07-21 01:14:43,438 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-21 01:14:43,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-21 01:14:43,452 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-21 01:14:43,453 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-21 01:14:43,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-21 01:14:43,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-21 01:14:43,458 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-21 01:14:43,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-21 01:14:43,461 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-21 01:14:43,465 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-21 01:14:43,466 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-21 01:14:43,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-21 01:14:43,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-21 01:14:43,473 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-21 01:14:43,474 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-21 01:14:43,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-21 01:14:43,475 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-21 01:14:43,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-21 01:14:43,478 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-21 01:14:43,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-21 01:14:43,481 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-21 01:14:43,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-21 01:14:43,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-21 01:14:43,485 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-21 01:14:43,485 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-21 01:14:43,485 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-21 01:14:43,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-21 01:14:43,486 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-21 01:14:43,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-21 01:14:43,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-21 01:14:43,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-21 01:14:43,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-21 01:14:43,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-21 01:14:43,491 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-21 01:14:43,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-21 01:14:43,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-21 01:14:43,492 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-21 01:14:43,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-21 01:14:43,493 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-21 01:14:43,493 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-21 01:14:43,494 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
[2020-07-21 01:14:43,509 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-21 01:14:43,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-21 01:14:43,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-21 01:14:43,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-21 01:14:43,510 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-21 01:14:43,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-21 01:14:43,511 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-21 01:14:43,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-21 01:14:43,511 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-21 01:14:43,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-21 01:14:43,512 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-21 01:14:43,512 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-21 01:14:43,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-21 01:14:43,512 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-21 01:14:43,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-21 01:14:43,512 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-21 01:14:43,513 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-21 01:14:43,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-21 01:14:43,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-21 01:14:43,513 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-21 01:14:43,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-21 01:14:43,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 01:14:43,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-21 01:14:43,514 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-21 01:14:43,514 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-21 01:14:43,514 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-21 01:14:43,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:43,515 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-21 01:14:43,515 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-21 01:14:43,515 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 -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-21 01:14:43,824 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-21 01:14:43,837 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-21 01:14:43,840 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-21 01:14:43,841 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-21 01:14:43,842 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-21 01:14:43,843 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i
[2020-07-21 01:14:43,909 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/484f9ab7c/26efd1791a1e45a8984e90dfbd43dda2/FLAG8fd679500
[2020-07-21 01:14:44,413 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-21 01:14:44,414 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i
[2020-07-21 01:14:44,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/484f9ab7c/26efd1791a1e45a8984e90dfbd43dda2/FLAG8fd679500
[2020-07-21 01:14:44,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/484f9ab7c/26efd1791a1e45a8984e90dfbd43dda2
[2020-07-21 01:14:44,704 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-21 01:14:44,708 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-21 01:14:44,709 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-21 01:14:44,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-21 01:14:44,712 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-21 01:14:44,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:14:44" (1/1) ...
[2020-07-21 01:14:44,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@386a0171 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:44, skipping insertion in model container
[2020-07-21 01:14:44,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:14:44" (1/1) ...
[2020-07-21 01:14:44,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-21 01:14:44,770 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-21 01:14:45,209 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:14:45,226 INFO L203 MainTranslator]: Completed pre-run
[2020-07-21 01:14:45,265 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:14:45,330 INFO L208 MainTranslator]: Completed translation
[2020-07-21 01:14:45,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45 WrapperNode
[2020-07-21 01:14:45,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-21 01:14:45,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-21 01:14:45,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-21 01:14:45,332 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-21 01:14:45,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45" (1/1) ...
[2020-07-21 01:14:45,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45" (1/1) ...
[2020-07-21 01:14:45,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45" (1/1) ...
[2020-07-21 01:14:45,365 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45" (1/1) ...
[2020-07-21 01:14:45,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45" (1/1) ...
[2020-07-21 01:14:45,411 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45" (1/1) ...
[2020-07-21 01:14:45,417 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45" (1/1) ...
[2020-07-21 01:14:45,425 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-21 01:14:45,426 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-21 01:14:45,426 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-21 01:14:45,426 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-21 01:14:45,427 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 01:14:45,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-21 01:14:45,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-21 01:14:45,489 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-21 01:14:45,489 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-07-21 01:14:45,489 INFO L130 BoogieDeclarations]: Found specification of procedure atof
[2020-07-21 01:14:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure atoi
[2020-07-21 01:14:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure atol
[2020-07-21 01:14:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure atoll
[2020-07-21 01:14:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtod
[2020-07-21 01:14:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtof
[2020-07-21 01:14:45,490 INFO L130 BoogieDeclarations]: Found specification of procedure strtold
[2020-07-21 01:14:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtol
[2020-07-21 01:14:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul
[2020-07-21 01:14:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq
[2020-07-21 01:14:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq
[2020-07-21 01:14:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll
[2020-07-21 01:14:45,491 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull
[2020-07-21 01:14:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure l64a
[2020-07-21 01:14:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure a64l
[2020-07-21 01:14:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure select
[2020-07-21 01:14:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure pselect
[2020-07-21 01:14:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-07-21 01:14:45,492 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-07-21 01:14:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-07-21 01:14:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure random
[2020-07-21 01:14:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure srandom
[2020-07-21 01:14:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure initstate
[2020-07-21 01:14:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure setstate
[2020-07-21 01:14:45,493 INFO L130 BoogieDeclarations]: Found specification of procedure random_r
[2020-07-21 01:14:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r
[2020-07-21 01:14:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r
[2020-07-21 01:14:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r
[2020-07-21 01:14:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure rand
[2020-07-21 01:14:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure srand
[2020-07-21 01:14:45,494 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r
[2020-07-21 01:14:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure drand48
[2020-07-21 01:14:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure erand48
[2020-07-21 01:14:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48
[2020-07-21 01:14:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48
[2020-07-21 01:14:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48
[2020-07-21 01:14:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48
[2020-07-21 01:14:45,495 INFO L130 BoogieDeclarations]: Found specification of procedure srand48
[2020-07-21 01:14:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure seed48
[2020-07-21 01:14:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48
[2020-07-21 01:14:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r
[2020-07-21 01:14:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r
[2020-07-21 01:14:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-07-21 01:14:45,496 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-07-21 01:14:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-07-21 01:14:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-07-21 01:14:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r
[2020-07-21 01:14:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r
[2020-07-21 01:14:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-07-21 01:14:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure malloc
[2020-07-21 01:14:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure calloc
[2020-07-21 01:14:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure realloc
[2020-07-21 01:14:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure free
[2020-07-21 01:14:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure cfree
[2020-07-21 01:14:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure alloca
[2020-07-21 01:14:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure valloc
[2020-07-21 01:14:45,499 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-07-21 01:14:45,499 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc
[2020-07-21 01:14:45,499 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2020-07-21 01:14:45,499 INFO L130 BoogieDeclarations]: Found specification of procedure atexit
[2020-07-21 01:14:45,499 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit
[2020-07-21 01:14:45,499 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit
[2020-07-21 01:14:45,499 INFO L130 BoogieDeclarations]: Found specification of procedure exit
[2020-07-21 01:14:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit
[2020-07-21 01:14:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit
[2020-07-21 01:14:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure getenv
[2020-07-21 01:14:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure putenv
[2020-07-21 01:14:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure setenv
[2020-07-21 01:14:45,500 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv
[2020-07-21 01:14:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv
[2020-07-21 01:14:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp
[2020-07-21 01:14:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp
[2020-07-21 01:14:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps
[2020-07-21 01:14:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-07-21 01:14:45,501 INFO L130 BoogieDeclarations]: Found specification of procedure system
[2020-07-21 01:14:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure realpath
[2020-07-21 01:14:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch
[2020-07-21 01:14:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure qsort
[2020-07-21 01:14:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure abs
[2020-07-21 01:14:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure labs
[2020-07-21 01:14:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure llabs
[2020-07-21 01:14:45,502 INFO L130 BoogieDeclarations]: Found specification of procedure div
[2020-07-21 01:14:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv
[2020-07-21 01:14:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv
[2020-07-21 01:14:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt
[2020-07-21 01:14:45,503 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt
[2020-07-21 01:14:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt
[2020-07-21 01:14:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt
[2020-07-21 01:14:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt
[2020-07-21 01:14:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt
[2020-07-21 01:14:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-07-21 01:14:45,504 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-07-21 01:14:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-07-21 01:14:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-07-21 01:14:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure mblen
[2020-07-21 01:14:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc
[2020-07-21 01:14:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb
[2020-07-21 01:14:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-07-21 01:14:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs
[2020-07-21 01:14:45,505 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch
[2020-07-21 01:14:45,506 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt
[2020-07-21 01:14:45,506 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg
[2020-07-21 01:14:45,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-21 01:14:45,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-21 01:14:45,506 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-21 01:14:45,506 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-21 01:14:45,506 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-07-21 01:14:45,507 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2020-07-21 01:14:45,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-07-21 01:14:45,507 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2020-07-21 01:14:45,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-21 01:14:45,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-21 01:14:45,507 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-21 01:14:46,008 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-21 01:14:46,009 INFO L295 CfgBuilder]: Removed 9 assume(true) statements.
[2020-07-21 01:14:46,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:46 BoogieIcfgContainer
[2020-07-21 01:14:46,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-21 01:14:46,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-21 01:14:46,014 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-21 01:14:46,018 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-21 01:14:46,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:14:44" (1/3) ...
[2020-07-21 01:14:46,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f961c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:46, skipping insertion in model container
[2020-07-21 01:14:46,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:45" (2/3) ...
[2020-07-21 01:14:46,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f961c5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:46, skipping insertion in model container
[2020-07-21 01:14:46,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:46" (3/3) ...
[2020-07-21 01:14:46,021 INFO L109 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i
[2020-07-21 01:14:46,032 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-21 01:14:46,040 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations.
[2020-07-21 01:14:46,055 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations.
[2020-07-21 01:14:46,080 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-21 01:14:46,080 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-21 01:14:46,080 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-21 01:14:46,080 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-21 01:14:46,081 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-21 01:14:46,081 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-21 01:14:46,081 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-21 01:14:46,081 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-21 01:14:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states.
[2020-07-21 01:14:46,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-21 01:14:46,110 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 01:14:46,111 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:14:46,112 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:14:46,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:14:46,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1483997276, now seen corresponding path program 1 times
[2020-07-21 01:14:46,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:14:46,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780284707]
[2020-07-21 01:14:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:46,314 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 01:14:46,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:14:46,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-21 01:14:46,328 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:14:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:14:46,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:14:46,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780284707]
[2020-07-21 01:14:46,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:14:46,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-21 01:14:46,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049285297]
[2020-07-21 01:14:46,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-21 01:14:46,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:14:46,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-21 01:14:46,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-21 01:14:46,384 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 2 states.
[2020-07-21 01:14:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:14:46,434 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions.
[2020-07-21 01:14:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states.
[2020-07-21 01:14:46,435 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10
[2020-07-21 01:14:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:14:46,446 INFO L225 Difference]: With dead ends: 70
[2020-07-21 01:14:46,446 INFO L226 Difference]: Without dead ends: 30
[2020-07-21 01:14:46,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-21 01:14:46,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-07-21 01:14:46,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-07-21 01:14:46,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-07-21 01:14:46,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions.
[2020-07-21 01:14:46,491 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10
[2020-07-21 01:14:46,491 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:14:46,491 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions.
[2020-07-21 01:14:46,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-21 01:14:46,492 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions.
[2020-07-21 01:14:46,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-07-21 01:14:46,492 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 01:14:46,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:14:46,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:46,707 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:14:46,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:14:46,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1199756337, now seen corresponding path program 1 times
[2020-07-21 01:14:46,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:14:46,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824701837]
[2020-07-21 01:14:46,708 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:46,833 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:14:46,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:14:46,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-07-21 01:14:46,839 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:14:46,899 INFO L190 IndexEqualityManager]: detected not equals via solver
[2020-07-21 01:14:46,926 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 7
[2020-07-21 01:14:46,927 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts.
[2020-07-21 01:14:46,941 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-21 01:14:46,941 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-07-21 01:14:46,942 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:18
[2020-07-21 01:14:46,985 INFO L544 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts.
[2020-07-21 01:14:46,993 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-21 01:14:46,999 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16
[2020-07-21 01:14:47,007 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24
[2020-07-21 01:14:47,009 INFO L544 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 2 xjuncts.
[2020-07-21 01:14:47,020 INFO L624 ElimStorePlain]: treesize reduction 17, result has 15.0 percent of original size
[2020-07-21 01:14:47,020 INFO L544 ElimStorePlain]: Start of recursive call 3: 1 dim-1 vars, End of recursive call: and 1 xjuncts.
[2020-07-21 01:14:47,025 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-21 01:14:47,026 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts.
[2020-07-21 01:14:47,026 INFO L244 ElimStorePlain]: Needed 4 recursive calls to eliminate 4 variables, input treesize:38, output treesize:4
[2020-07-21 01:14:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:14:47,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:14:47,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824701837]
[2020-07-21 01:14:47,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:14:47,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-21 01:14:47,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441108690]
[2020-07-21 01:14:47,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-21 01:14:47,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:14:47,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-21 01:14:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-21 01:14:47,036 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states.
[2020-07-21 01:14:47,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:14:47,107 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions.
[2020-07-21 01:14:47,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states.
[2020-07-21 01:14:47,107 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11
[2020-07-21 01:14:47,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:14:47,109 INFO L225 Difference]: With dead ends: 46
[2020-07-21 01:14:47,109 INFO L226 Difference]: Without dead ends: 42
[2020-07-21 01:14:47,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-21 01:14:47,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-07-21 01:14:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32.
[2020-07-21 01:14:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-07-21 01:14:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions.
[2020-07-21 01:14:47,117 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11
[2020-07-21 01:14:47,118 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:14:47,118 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions.
[2020-07-21 01:14:47,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-21 01:14:47,118 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions.
[2020-07-21 01:14:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-21 01:14:47,119 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 01:14:47,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:14:47,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:47,334 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:14:47,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:14:47,335 INFO L82 PathProgramCache]: Analyzing trace with hash -97127833, now seen corresponding path program 1 times
[2020-07-21 01:14:47,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:14:47,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092411253]
[2020-07-21 01:14:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:47,489 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 01:14:47,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:14:47,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:14:47,492 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:14:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:14:47,498 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:14:47,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092411253]
[2020-07-21 01:14:47,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:14:47,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:14:47,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313350275]
[2020-07-21 01:14:47,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:14:47,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:14:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:14:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:14:47,501 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 3 states.
[2020-07-21 01:14:47,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:14:47,531 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions.
[2020-07-21 01:14:47,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states.
[2020-07-21 01:14:47,532 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14
[2020-07-21 01:14:47,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:14:47,535 INFO L225 Difference]: With dead ends: 75
[2020-07-21 01:14:47,535 INFO L226 Difference]: Without dead ends: 53
[2020-07-21 01:14:47,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:14:47,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states.
[2020-07-21 01:14:47,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39.
[2020-07-21 01:14:47,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states.
[2020-07-21 01:14:47,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions.
[2020-07-21 01:14:47,544 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14
[2020-07-21 01:14:47,544 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:14:47,544 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions.
[2020-07-21 01:14:47,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:14:47,545 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions.
[2020-07-21 01:14:47,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-07-21 01:14:47,546 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 01:14:47,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:14:47,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:47,761 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:14:47,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:14:47,761 INFO L82 PathProgramCache]: Analyzing trace with hash 2075944349, now seen corresponding path program 1 times
[2020-07-21 01:14:47,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:14:47,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714646259]
[2020-07-21 01:14:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:47,882 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:14:47,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-21 01:14:47,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 01:14:47,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-21 01:14:47,901 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 01:14:47,926 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-21 01:14:47,927 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-07-21 01:14:48,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:48,172 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:14:48 BoogieIcfgContainer
[2020-07-21 01:14:48,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-21 01:14:48,174 INFO L168 Benchmark]: Toolchain (without parser) took 3468.15 ms. Allocated memory was 136.3 MB in the beginning and 229.6 MB in the end (delta: 93.3 MB). Free memory was 99.8 MB in the beginning and 81.6 MB in the end (delta: 18.3 MB). Peak memory consumption was 111.6 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:48,175 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory is still 119.0 MB. There was no memory consumed. Max. memory is 7.1 GB.
[2020-07-21 01:14:48,176 INFO L168 Benchmark]: CACSL2BoogieTranslator took 622.87 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 99.4 MB in the beginning and 168.1 MB in the end (delta: -68.7 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:48,176 INFO L168 Benchmark]: Boogie Preprocessor took 93.73 ms. Allocated memory is still 200.8 MB. Free memory was 168.1 MB in the beginning and 165.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:48,177 INFO L168 Benchmark]: RCFGBuilder took 587.06 ms. Allocated memory is still 200.8 MB. Free memory was 164.6 MB in the beginning and 119.8 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:48,178 INFO L168 Benchmark]: TraceAbstraction took 2157.90 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 119.8 MB in the beginning and 81.6 MB in the end (delta: 38.2 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:48,182 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.20 ms. Allocated memory is still 136.3 MB. Free memory is still 119.0 MB. There was no memory consumed. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 622.87 ms. Allocated memory was 136.3 MB in the beginning and 200.8 MB in the end (delta: 64.5 MB). Free memory was 99.4 MB in the beginning and 168.1 MB in the end (delta: -68.7 MB). Peak memory consumption was 27.2 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 93.73 ms. Allocated memory is still 200.8 MB. Free memory was 168.1 MB in the beginning and 165.6 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 587.06 ms. Allocated memory is still 200.8 MB. Free memory was 164.6 MB in the beginning and 119.8 MB in the end (delta: 44.9 MB). Peak memory consumption was 44.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 2157.90 ms. Allocated memory was 200.8 MB in the beginning and 229.6 MB in the end (delta: 28.8 MB). Free memory was 119.8 MB in the beginning and 81.6 MB in the end (delta: 38.2 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 1023]: a call of __VERIFIER_error() is reachable
a call of __VERIFIER_error() is reachable
We found a FailurePath:
[L986] SLL* head = malloc(sizeof(SLL));
[L987] head->next = head
[L988] head->data = 0
[L990] SLL* x = head;
[L991] int state = 1;
VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}]
[L994] COND FALSE !(__VERIFIER_nondet_int())
[L1016] x->data = state
[L1018] EXPR head->next
[L1018] x = head->next
[L1019] COND FALSE !(!(((void*)0) != x))
VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}]
[L1021] EXPR x->data
VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1]
[L1021] COND TRUE x->data != 0
[L1023] EXPR x->next
[L1023] EXPR x->next->data
[L1023] EXPR x->next->data != 0 && x->data > x->next->data
[L1023] EXPR x->data
[L1023] EXPR x->next
[L1023] EXPR x->next->data
[L1023] EXPR x->next->data != 0 && x->data > x->next->data
VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}, x->data=1, x->next={-1:0}, x->next={-1:0}, x->next->data=1, x->next->data=1, x->next->data != 0 && x->data > x->next->data=0]
[L1023] COND TRUE !(x->next->data != 0 && x->data > x->next->data)
[L1023] __VERIFIER_error()
VAL [head={-1:0}, malloc(sizeof(SLL))={-1:0}, state=1, x={-1:0}]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 3 procedures, 38 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 44 SDslu, 61 SDs, 0 SdLazy, 35 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=3, 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, 3 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 52 NumberOfCodeBlocks, 49 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 994 SizeOfPredicates, 4 NumberOfNonLiveVariables, 222 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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...