/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 true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-properties/list_flag-1.i


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


This is Ultimate 0.1.25-5644d1e-m
[2020-08-18 23:32:21,233 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-08-18 23:32:21,236 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-08-18 23:32:21,280 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-08-18 23:32:21,280 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-08-18 23:32:21,293 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-08-18 23:32:21,296 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-08-18 23:32:21,299 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-08-18 23:32:21,301 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-08-18 23:32:21,304 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-08-18 23:32:21,305 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-08-18 23:32:21,307 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-08-18 23:32:21,308 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-08-18 23:32:21,309 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-08-18 23:32:21,310 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-08-18 23:32:21,312 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-08-18 23:32:21,314 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-08-18 23:32:21,315 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-08-18 23:32:21,316 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-08-18 23:32:21,324 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-08-18 23:32:21,327 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-08-18 23:32:21,328 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-08-18 23:32:21,330 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-08-18 23:32:21,331 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-08-18 23:32:21,334 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-08-18 23:32:21,334 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-08-18 23:32:21,334 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-08-18 23:32:21,337 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-08-18 23:32:21,337 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-08-18 23:32:21,338 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-08-18 23:32:21,338 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-08-18 23:32:21,339 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-08-18 23:32:21,340 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-08-18 23:32:21,340 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-08-18 23:32:21,342 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-08-18 23:32:21,342 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-08-18 23:32:21,342 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-08-18 23:32:21,343 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-08-18 23:32:21,343 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-08-18 23:32:21,343 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-08-18 23:32:21,344 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-08-18 23:32:21,345 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
[2020-08-18 23:32:21,371 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-08-18 23:32:21,371 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-08-18 23:32:21,372 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-08-18 23:32:21,372 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-08-18 23:32:21,373 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-08-18 23:32:21,373 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-08-18 23:32:21,373 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-08-18 23:32:21,373 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-08-18 23:32:21,373 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-08-18 23:32:21,374 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-08-18 23:32:21,374 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-08-18 23:32:21,374 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-08-18 23:32:21,374 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-08-18 23:32:21,374 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-08-18 23:32:21,374 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-08-18 23:32:21,375 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-08-18 23:32:21,375 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-08-18 23:32:21,375 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-08-18 23:32:21,375 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-08-18 23:32:21,375 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-08-18 23:32:21,376 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-08-18 23:32:21,376 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-08-18 23:32:21,376 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-08-18 23:32:21,376 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-08-18 23:32:21,376 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-08-18 23:32:21,377 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-08-18 23:32:21,377 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-08-18 23:32:21,377 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-08-18 23:32:21,377 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-08-18 23:32:21,377 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 -> true
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;
[2020-08-18 23:32:21,723 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-08-18 23:32:21,746 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-08-18 23:32:21,750 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-08-18 23:32:21,752 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-08-18 23:32:21,755 INFO  L275        PluginConnector]: CDTParser initialized
[2020-08-18 23:32:21,756 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_flag-1.i
[2020-08-18 23:32:21,820 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff0e73730/a46d02a44de54a1e96ac07e44515894e/FLAGbabe53301
[2020-08-18 23:32:22,366 INFO  L306              CDTParser]: Found 1 translation units.
[2020-08-18 23:32:22,367 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-properties/list_flag-1.i
[2020-08-18 23:32:22,379 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff0e73730/a46d02a44de54a1e96ac07e44515894e/FLAGbabe53301
[2020-08-18 23:32:22,683 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ff0e73730/a46d02a44de54a1e96ac07e44515894e
[2020-08-18 23:32:22,691 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-08-18 23:32:22,693 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-08-18 23:32:22,694 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-08-18 23:32:22,694 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-08-18 23:32:22,697 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-08-18 23:32:22,698 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:22" (1/1) ...
[2020-08-18 23:32:22,701 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e8d2598 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:22, skipping insertion in model container
[2020-08-18 23:32:22,701 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:32:22" (1/1) ...
[2020-08-18 23:32:22,709 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-08-18 23:32:22,751 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-08-18 23:32:23,199 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 23:32:23,209 INFO  L203         MainTranslator]: Completed pre-run
[2020-08-18 23:32:23,244 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-08-18 23:32:23,304 INFO  L208         MainTranslator]: Completed translation
[2020-08-18 23:32:23,305 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23 WrapperNode
[2020-08-18 23:32:23,305 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-08-18 23:32:23,306 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-08-18 23:32:23,306 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-08-18 23:32:23,306 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-08-18 23:32:23,320 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23" (1/1) ...
[2020-08-18 23:32:23,320 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23" (1/1) ...
[2020-08-18 23:32:23,337 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23" (1/1) ...
[2020-08-18 23:32:23,337 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23" (1/1) ...
[2020-08-18 23:32:23,351 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23" (1/1) ...
[2020-08-18 23:32:23,359 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23" (1/1) ...
[2020-08-18 23:32:23,369 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23" (1/1) ...
[2020-08-18 23:32:23,378 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-08-18 23:32:23,379 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-08-18 23:32:23,379 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-08-18 23:32:23,379 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-08-18 23:32:23,384 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23" (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
[2020-08-18 23:32:23,453 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-08-18 23:32:23,453 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-08-18 23:32:23,453 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_32
[2020-08-18 23:32:23,453 INFO  L138     BoogieDeclarations]: Found implementation of procedure __bswap_64
[2020-08-18 23:32:23,453 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint16_identity
[2020-08-18 23:32:23,454 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint32_identity
[2020-08-18 23:32:23,454 INFO  L138     BoogieDeclarations]: Found implementation of procedure __uint64_identity
[2020-08-18 23:32:23,454 INFO  L138     BoogieDeclarations]: Found implementation of procedure myexit
[2020-08-18 23:32:23,454 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-08-18 23:32:23,454 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-08-18 23:32:23,455 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-08-18 23:32:23,455 INFO  L130     BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max
[2020-08-18 23:32:23,455 INFO  L130     BoogieDeclarations]: Found specification of procedure atof
[2020-08-18 23:32:23,455 INFO  L130     BoogieDeclarations]: Found specification of procedure atoi
[2020-08-18 23:32:23,455 INFO  L130     BoogieDeclarations]: Found specification of procedure atol
[2020-08-18 23:32:23,455 INFO  L130     BoogieDeclarations]: Found specification of procedure atoll
[2020-08-18 23:32:23,456 INFO  L130     BoogieDeclarations]: Found specification of procedure strtod
[2020-08-18 23:32:23,456 INFO  L130     BoogieDeclarations]: Found specification of procedure strtof
[2020-08-18 23:32:23,456 INFO  L130     BoogieDeclarations]: Found specification of procedure strtold
[2020-08-18 23:32:23,456 INFO  L130     BoogieDeclarations]: Found specification of procedure strtol
[2020-08-18 23:32:23,456 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoul
[2020-08-18 23:32:23,456 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoq
[2020-08-18 23:32:23,457 INFO  L130     BoogieDeclarations]: Found specification of procedure strtouq
[2020-08-18 23:32:23,457 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoll
[2020-08-18 23:32:23,457 INFO  L130     BoogieDeclarations]: Found specification of procedure strtoull
[2020-08-18 23:32:23,457 INFO  L130     BoogieDeclarations]: Found specification of procedure l64a
[2020-08-18 23:32:23,457 INFO  L130     BoogieDeclarations]: Found specification of procedure a64l
[2020-08-18 23:32:23,457 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_32
[2020-08-18 23:32:23,458 INFO  L130     BoogieDeclarations]: Found specification of procedure __bswap_64
[2020-08-18 23:32:23,458 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint16_identity
[2020-08-18 23:32:23,458 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint32_identity
[2020-08-18 23:32:23,458 INFO  L130     BoogieDeclarations]: Found specification of procedure __uint64_identity
[2020-08-18 23:32:23,458 INFO  L130     BoogieDeclarations]: Found specification of procedure select
[2020-08-18 23:32:23,458 INFO  L130     BoogieDeclarations]: Found specification of procedure pselect
[2020-08-18 23:32:23,459 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_major
[2020-08-18 23:32:23,459 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_minor
[2020-08-18 23:32:23,459 INFO  L130     BoogieDeclarations]: Found specification of procedure gnu_dev_makedev
[2020-08-18 23:32:23,459 INFO  L130     BoogieDeclarations]: Found specification of procedure random
[2020-08-18 23:32:23,459 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom
[2020-08-18 23:32:23,459 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate
[2020-08-18 23:32:23,459 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate
[2020-08-18 23:32:23,460 INFO  L130     BoogieDeclarations]: Found specification of procedure random_r
[2020-08-18 23:32:23,460 INFO  L130     BoogieDeclarations]: Found specification of procedure srandom_r
[2020-08-18 23:32:23,460 INFO  L130     BoogieDeclarations]: Found specification of procedure initstate_r
[2020-08-18 23:32:23,460 INFO  L130     BoogieDeclarations]: Found specification of procedure setstate_r
[2020-08-18 23:32:23,460 INFO  L130     BoogieDeclarations]: Found specification of procedure rand
[2020-08-18 23:32:23,460 INFO  L130     BoogieDeclarations]: Found specification of procedure srand
[2020-08-18 23:32:23,461 INFO  L130     BoogieDeclarations]: Found specification of procedure rand_r
[2020-08-18 23:32:23,461 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48
[2020-08-18 23:32:23,461 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48
[2020-08-18 23:32:23,461 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48
[2020-08-18 23:32:23,461 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48
[2020-08-18 23:32:23,461 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48
[2020-08-18 23:32:23,462 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48
[2020-08-18 23:32:23,462 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48
[2020-08-18 23:32:23,462 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48
[2020-08-18 23:32:23,462 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48
[2020-08-18 23:32:23,462 INFO  L130     BoogieDeclarations]: Found specification of procedure drand48_r
[2020-08-18 23:32:23,462 INFO  L130     BoogieDeclarations]: Found specification of procedure erand48_r
[2020-08-18 23:32:23,462 INFO  L130     BoogieDeclarations]: Found specification of procedure lrand48_r
[2020-08-18 23:32:23,463 INFO  L130     BoogieDeclarations]: Found specification of procedure nrand48_r
[2020-08-18 23:32:23,463 INFO  L130     BoogieDeclarations]: Found specification of procedure mrand48_r
[2020-08-18 23:32:23,463 INFO  L130     BoogieDeclarations]: Found specification of procedure jrand48_r
[2020-08-18 23:32:23,463 INFO  L130     BoogieDeclarations]: Found specification of procedure srand48_r
[2020-08-18 23:32:23,463 INFO  L130     BoogieDeclarations]: Found specification of procedure seed48_r
[2020-08-18 23:32:23,463 INFO  L130     BoogieDeclarations]: Found specification of procedure lcong48_r
[2020-08-18 23:32:23,464 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-08-18 23:32:23,464 INFO  L130     BoogieDeclarations]: Found specification of procedure calloc
[2020-08-18 23:32:23,464 INFO  L130     BoogieDeclarations]: Found specification of procedure realloc
[2020-08-18 23:32:23,464 INFO  L130     BoogieDeclarations]: Found specification of procedure free
[2020-08-18 23:32:23,464 INFO  L130     BoogieDeclarations]: Found specification of procedure alloca
[2020-08-18 23:32:23,464 INFO  L130     BoogieDeclarations]: Found specification of procedure valloc
[2020-08-18 23:32:23,465 INFO  L130     BoogieDeclarations]: Found specification of procedure posix_memalign
[2020-08-18 23:32:23,465 INFO  L130     BoogieDeclarations]: Found specification of procedure aligned_alloc
[2020-08-18 23:32:23,465 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-08-18 23:32:23,465 INFO  L130     BoogieDeclarations]: Found specification of procedure atexit
[2020-08-18 23:32:23,465 INFO  L130     BoogieDeclarations]: Found specification of procedure at_quick_exit
[2020-08-18 23:32:23,465 INFO  L130     BoogieDeclarations]: Found specification of procedure on_exit
[2020-08-18 23:32:23,466 INFO  L130     BoogieDeclarations]: Found specification of procedure exit
[2020-08-18 23:32:23,466 INFO  L130     BoogieDeclarations]: Found specification of procedure quick_exit
[2020-08-18 23:32:23,466 INFO  L130     BoogieDeclarations]: Found specification of procedure _Exit
[2020-08-18 23:32:23,466 INFO  L130     BoogieDeclarations]: Found specification of procedure getenv
[2020-08-18 23:32:23,466 INFO  L130     BoogieDeclarations]: Found specification of procedure putenv
[2020-08-18 23:32:23,466 INFO  L130     BoogieDeclarations]: Found specification of procedure setenv
[2020-08-18 23:32:23,466 INFO  L130     BoogieDeclarations]: Found specification of procedure unsetenv
[2020-08-18 23:32:23,467 INFO  L130     BoogieDeclarations]: Found specification of procedure clearenv
[2020-08-18 23:32:23,467 INFO  L130     BoogieDeclarations]: Found specification of procedure mktemp
[2020-08-18 23:32:23,467 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemp
[2020-08-18 23:32:23,467 INFO  L130     BoogieDeclarations]: Found specification of procedure mkstemps
[2020-08-18 23:32:23,467 INFO  L130     BoogieDeclarations]: Found specification of procedure mkdtemp
[2020-08-18 23:32:23,467 INFO  L130     BoogieDeclarations]: Found specification of procedure system
[2020-08-18 23:32:23,467 INFO  L130     BoogieDeclarations]: Found specification of procedure realpath
[2020-08-18 23:32:23,468 INFO  L130     BoogieDeclarations]: Found specification of procedure bsearch
[2020-08-18 23:32:23,468 INFO  L130     BoogieDeclarations]: Found specification of procedure qsort
[2020-08-18 23:32:23,468 INFO  L130     BoogieDeclarations]: Found specification of procedure abs
[2020-08-18 23:32:23,468 INFO  L130     BoogieDeclarations]: Found specification of procedure labs
[2020-08-18 23:32:23,468 INFO  L130     BoogieDeclarations]: Found specification of procedure llabs
[2020-08-18 23:32:23,468 INFO  L130     BoogieDeclarations]: Found specification of procedure div
[2020-08-18 23:32:23,468 INFO  L130     BoogieDeclarations]: Found specification of procedure ldiv
[2020-08-18 23:32:23,469 INFO  L130     BoogieDeclarations]: Found specification of procedure lldiv
[2020-08-18 23:32:23,469 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt
[2020-08-18 23:32:23,469 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt
[2020-08-18 23:32:23,469 INFO  L130     BoogieDeclarations]: Found specification of procedure gcvt
[2020-08-18 23:32:23,469 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt
[2020-08-18 23:32:23,469 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt
[2020-08-18 23:32:23,469 INFO  L130     BoogieDeclarations]: Found specification of procedure qgcvt
[2020-08-18 23:32:23,470 INFO  L130     BoogieDeclarations]: Found specification of procedure ecvt_r
[2020-08-18 23:32:23,470 INFO  L130     BoogieDeclarations]: Found specification of procedure fcvt_r
[2020-08-18 23:32:23,470 INFO  L130     BoogieDeclarations]: Found specification of procedure qecvt_r
[2020-08-18 23:32:23,470 INFO  L130     BoogieDeclarations]: Found specification of procedure qfcvt_r
[2020-08-18 23:32:23,470 INFO  L130     BoogieDeclarations]: Found specification of procedure mblen
[2020-08-18 23:32:23,470 INFO  L130     BoogieDeclarations]: Found specification of procedure mbtowc
[2020-08-18 23:32:23,470 INFO  L130     BoogieDeclarations]: Found specification of procedure wctomb
[2020-08-18 23:32:23,471 INFO  L130     BoogieDeclarations]: Found specification of procedure mbstowcs
[2020-08-18 23:32:23,471 INFO  L130     BoogieDeclarations]: Found specification of procedure wcstombs
[2020-08-18 23:32:23,471 INFO  L130     BoogieDeclarations]: Found specification of procedure rpmatch
[2020-08-18 23:32:23,471 INFO  L130     BoogieDeclarations]: Found specification of procedure getsubopt
[2020-08-18 23:32:23,471 INFO  L130     BoogieDeclarations]: Found specification of procedure getloadavg
[2020-08-18 23:32:23,471 INFO  L130     BoogieDeclarations]: Found specification of procedure myexit
[2020-08-18 23:32:23,471 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-08-18 23:32:23,472 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-08-18 23:32:23,472 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-08-18 23:32:23,472 INFO  L130     BoogieDeclarations]: Found specification of procedure write~$Pointer$
[2020-08-18 23:32:23,472 INFO  L130     BoogieDeclarations]: Found specification of procedure read~$Pointer$
[2020-08-18 23:32:23,472 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-08-18 23:32:23,472 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-08-18 23:32:23,472 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-08-18 23:32:23,473 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-08-18 23:32:23,779 INFO  L732   $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true;
[2020-08-18 23:32:23,983 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-08-18 23:32:23,983 INFO  L295             CfgBuilder]: Removed 3 assume(true) statements.
[2020-08-18 23:32:23,987 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:23 BoogieIcfgContainer
[2020-08-18 23:32:23,987 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-08-18 23:32:23,989 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-08-18 23:32:23,989 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-08-18 23:32:23,992 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-08-18 23:32:23,993 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:32:22" (1/3) ...
[2020-08-18 23:32:23,994 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2719d695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:23, skipping insertion in model container
[2020-08-18 23:32:23,994 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:32:23" (2/3) ...
[2020-08-18 23:32:23,995 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2719d695 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:32:23, skipping insertion in model container
[2020-08-18 23:32:23,995 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:32:23" (3/3) ...
[2020-08-18 23:32:23,997 INFO  L109   eAbstractionObserver]: Analyzing ICFG list_flag-1.i
[2020-08-18 23:32:24,008 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-08-18 23:32:24,016 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-08-18 23:32:24,031 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-08-18 23:32:24,057 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-08-18 23:32:24,057 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-08-18 23:32:24,057 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-08-18 23:32:24,058 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-08-18 23:32:24,058 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-08-18 23:32:24,058 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-08-18 23:32:24,058 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-08-18 23:32:24,059 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-08-18 23:32:24,078 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states.
[2020-08-18 23:32:24,085 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-08-18 23:32:24,085 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:32:24,086 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 23:32:24,087 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:32:24,093 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:32:24,094 INFO  L82        PathProgramCache]: Analyzing trace with hash 1184417696, now seen corresponding path program 1 times
[2020-08-18 23:32:24,103 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:32:24,104 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489592843]
[2020-08-18 23:32:24,104 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:32:24,244 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:24,308 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:32:24,312 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:24,322 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 23:32:24,323 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489592843]
[2020-08-18 23:32:24,325 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:32:24,325 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-08-18 23:32:24,326 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991846808]
[2020-08-18 23:32:24,330 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-08-18 23:32:24,330 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:32:24,341 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-08-18 23:32:24,341 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-08-18 23:32:24,343 INFO  L87              Difference]: Start difference. First operand 32 states. Second operand 3 states.
[2020-08-18 23:32:24,462 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:32:24,462 INFO  L93              Difference]: Finished difference Result 46 states and 61 transitions.
[2020-08-18 23:32:24,463 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-08-18 23:32:24,464 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 15
[2020-08-18 23:32:24,465 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:32:24,474 INFO  L225             Difference]: With dead ends: 46
[2020-08-18 23:32:24,474 INFO  L226             Difference]: Without dead ends: 24
[2020-08-18 23:32:24,478 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
[2020-08-18 23:32:24,497 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-08-18 23:32:24,516 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2020-08-18 23:32:24,517 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-08-18 23:32:24,536 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions.
[2020-08-18 23:32:24,538 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15
[2020-08-18 23:32:24,538 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:32:24,538 INFO  L479      AbstractCegarLoop]: Abstraction has 24 states and 28 transitions.
[2020-08-18 23:32:24,539 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-08-18 23:32:24,539 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions.
[2020-08-18 23:32:24,540 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2020-08-18 23:32:24,540 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:32:24,540 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 23:32:24,540 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-08-18 23:32:24,541 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:32:24,541 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:32:24,541 INFO  L82        PathProgramCache]: Analyzing trace with hash -218242506, now seen corresponding path program 1 times
[2020-08-18 23:32:24,541 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:32:24,542 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371316408]
[2020-08-18 23:32:24,542 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:32:24,569 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:24,645 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:32:24,647 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:24,656 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 23:32:24,656 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371316408]
[2020-08-18 23:32:24,657 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:32:24,657 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 23:32:24,657 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241066810]
[2020-08-18 23:32:24,659 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 23:32:24,659 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:32:24,660 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 23:32:24,660 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 23:32:24,660 INFO  L87              Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states.
[2020-08-18 23:32:24,813 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:32:24,814 INFO  L93              Difference]: Finished difference Result 48 states and 57 transitions.
[2020-08-18 23:32:24,814 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 23:32:24,814 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 17
[2020-08-18 23:32:24,815 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:32:24,816 INFO  L225             Difference]: With dead ends: 48
[2020-08-18 23:32:24,816 INFO  L226             Difference]: Without dead ends: 44
[2020-08-18 23:32:24,817 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-08-18 23:32:24,817 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 44 states.
[2020-08-18 23:32:24,824 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32.
[2020-08-18 23:32:24,824 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-08-18 23:32:24,825 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions.
[2020-08-18 23:32:24,825 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 17
[2020-08-18 23:32:24,826 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:32:24,826 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 38 transitions.
[2020-08-18 23:32:24,826 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 23:32:24,826 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions.
[2020-08-18 23:32:24,827 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-08-18 23:32:24,827 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:32:24,827 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 23:32:24,828 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-08-18 23:32:24,828 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:32:24,828 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:32:24,828 INFO  L82        PathProgramCache]: Analyzing trace with hash 771025649, now seen corresponding path program 1 times
[2020-08-18 23:32:24,829 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:32:24,829 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158659002]
[2020-08-18 23:32:24,829 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:32:24,865 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:24,957 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:32:24,959 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:24,974 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 23:32:24,974 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158659002]
[2020-08-18 23:32:24,974 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:32:24,975 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 23:32:24,975 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390433119]
[2020-08-18 23:32:24,976 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 23:32:24,976 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:32:24,976 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 23:32:24,977 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 23:32:24,977 INFO  L87              Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 6 states.
[2020-08-18 23:32:25,094 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:32:25,094 INFO  L93              Difference]: Finished difference Result 50 states and 58 transitions.
[2020-08-18 23:32:25,094 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 23:32:25,095 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 19
[2020-08-18 23:32:25,095 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:32:25,096 INFO  L225             Difference]: With dead ends: 50
[2020-08-18 23:32:25,096 INFO  L226             Difference]: Without dead ends: 42
[2020-08-18 23:32:25,097 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-08-18 23:32:25,097 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-08-18 23:32:25,101 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 30.
[2020-08-18 23:32:25,102 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-08-18 23:32:25,103 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions.
[2020-08-18 23:32:25,103 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19
[2020-08-18 23:32:25,103 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:32:25,103 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 35 transitions.
[2020-08-18 23:32:25,103 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 23:32:25,104 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions.
[2020-08-18 23:32:25,104 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-08-18 23:32:25,104 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:32:25,105 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 23:32:25,105 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-08-18 23:32:25,105 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:32:25,105 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:32:25,106 INFO  L82        PathProgramCache]: Analyzing trace with hash -472715872, now seen corresponding path program 1 times
[2020-08-18 23:32:25,106 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:32:25,106 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177631907]
[2020-08-18 23:32:25,106 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:32:25,122 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:25,167 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:32:25,170 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:25,175 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 23:32:25,175 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177631907]
[2020-08-18 23:32:25,175 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:32:25,176 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-08-18 23:32:25,176 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922304805]
[2020-08-18 23:32:25,176 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-08-18 23:32:25,176 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:32:25,177 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-08-18 23:32:25,177 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-08-18 23:32:25,177 INFO  L87              Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states.
[2020-08-18 23:32:25,287 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:32:25,288 INFO  L93              Difference]: Finished difference Result 48 states and 55 transitions.
[2020-08-18 23:32:25,288 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-08-18 23:32:25,288 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 19
[2020-08-18 23:32:25,289 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:32:25,289 INFO  L225             Difference]: With dead ends: 48
[2020-08-18 23:32:25,290 INFO  L226             Difference]: Without dead ends: 38
[2020-08-18 23:32:25,290 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-08-18 23:32:25,291 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-08-18 23:32:25,294 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26.
[2020-08-18 23:32:25,295 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-08-18 23:32:25,296 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions.
[2020-08-18 23:32:25,296 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19
[2020-08-18 23:32:25,296 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:32:25,296 INFO  L479      AbstractCegarLoop]: Abstraction has 26 states and 30 transitions.
[2020-08-18 23:32:25,296 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-08-18 23:32:25,297 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions.
[2020-08-18 23:32:25,297 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-08-18 23:32:25,297 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:32:25,298 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 23:32:25,298 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-08-18 23:32:25,298 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:32:25,298 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:32:25,299 INFO  L82        PathProgramCache]: Analyzing trace with hash -1962636917, now seen corresponding path program 1 times
[2020-08-18 23:32:25,299 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:32:25,299 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462631817]
[2020-08-18 23:32:25,299 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:32:25,327 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:25,393 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-08-18 23:32:25,395 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-08-18 23:32:25,399 INFO  L134       CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-08-18 23:32:25,400 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462631817]
[2020-08-18 23:32:25,400 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-08-18 23:32:25,400 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-08-18 23:32:25,400 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60124593]
[2020-08-18 23:32:25,401 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-08-18 23:32:25,401 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-08-18 23:32:25,401 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-08-18 23:32:25,402 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 23:32:25,402 INFO  L87              Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 4 states.
[2020-08-18 23:32:25,470 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-08-18 23:32:25,470 INFO  L93              Difference]: Finished difference Result 54 states and 64 transitions.
[2020-08-18 23:32:25,471 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-08-18 23:32:25,471 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 23
[2020-08-18 23:32:25,471 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-08-18 23:32:25,472 INFO  L225             Difference]: With dead ends: 54
[2020-08-18 23:32:25,472 INFO  L226             Difference]: Without dead ends: 38
[2020-08-18 23:32:25,473 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2020-08-18 23:32:25,473 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 38 states.
[2020-08-18 23:32:25,478 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34.
[2020-08-18 23:32:25,478 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-08-18 23:32:25,479 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions.
[2020-08-18 23:32:25,479 INFO  L78                 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 23
[2020-08-18 23:32:25,480 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-08-18 23:32:25,480 INFO  L479      AbstractCegarLoop]: Abstraction has 34 states and 39 transitions.
[2020-08-18 23:32:25,480 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-08-18 23:32:25,480 INFO  L276                IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions.
[2020-08-18 23:32:25,481 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-08-18 23:32:25,481 INFO  L414         BasicCegarLoop]: Found error trace
[2020-08-18 23:32:25,482 INFO  L422         BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-08-18 23:32:25,482 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-08-18 23:32:25,482 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-08-18 23:32:25,482 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-08-18 23:32:25,483 INFO  L82        PathProgramCache]: Analyzing trace with hash 1888593434, now seen corresponding path program 1 times
[2020-08-18 23:32:25,483 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-08-18 23:32:25,483 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033127600]
[2020-08-18 23:32:25,484 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-08-18 23:32:25,508 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-08-18 23:32:25,511 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-08-18 23:32:25,511 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-08-18 23:32:25,515 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-08-18 23:32:25,533 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:32:25 BoogieIcfgContainer
[2020-08-18 23:32:25,533 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-08-18 23:32:25,537 INFO  L168              Benchmark]: Toolchain (without parser) took 2842.77 ms. Allocated memory was 147.8 MB in the beginning and 235.4 MB in the end (delta: 87.6 MB). Free memory was 101.6 MB in the beginning and 108.1 MB in the end (delta: -6.5 MB). Peak memory consumption was 81.0 MB. Max. memory is 7.1 GB.
[2020-08-18 23:32:25,538 INFO  L168              Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-08-18 23:32:25,539 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 612.03 ms. Allocated memory was 147.8 MB in the beginning and 202.4 MB in the end (delta: 54.5 MB). Free memory was 101.3 MB in the beginning and 167.4 MB in the end (delta: -66.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB.
[2020-08-18 23:32:25,540 INFO  L168              Benchmark]: Boogie Preprocessor took 72.22 ms. Allocated memory is still 202.4 MB. Free memory was 167.4 MB in the beginning and 164.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB.
[2020-08-18 23:32:25,541 INFO  L168              Benchmark]: RCFGBuilder took 608.90 ms. Allocated memory is still 202.4 MB. Free memory was 164.2 MB in the beginning and 120.9 MB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB.
[2020-08-18 23:32:25,542 INFO  L168              Benchmark]: TraceAbstraction took 1544.67 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 120.2 MB in the beginning and 108.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB.
[2020-08-18 23:32:25,546 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.25 ms. Allocated memory is still 147.8 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 612.03 ms. Allocated memory was 147.8 MB in the beginning and 202.4 MB in the end (delta: 54.5 MB). Free memory was 101.3 MB in the beginning and 167.4 MB in the end (delta: -66.1 MB). Peak memory consumption was 19.7 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 72.22 ms. Allocated memory is still 202.4 MB. Free memory was 167.4 MB in the beginning and 164.2 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 608.90 ms. Allocated memory is still 202.4 MB. Free memory was 164.2 MB in the beginning and 120.9 MB in the end (delta: 43.3 MB). Peak memory consumption was 43.3 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1544.67 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 120.2 MB in the beginning and 108.1 MB in the end (delta: 12.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 546]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L521]              int flag = __VERIFIER_nondet_int();
[L522]              List p, a, t;
[L523]              a = (List) malloc(sizeof(struct node))
[L524]  COND FALSE  !(a == 0)
[L525]              p = a
[L526]  COND TRUE   __VERIFIER_nondet_int()
[L527]  COND TRUE   \read(flag)
[L528]              p->h = 1
[L532]              t = (List) malloc(sizeof(struct node))
[L533]  COND FALSE  !(t == 0)
[L534]              p->n = t
[L535]  EXPR        p->n
[L535]              p = p->n
[L526]  COND FALSE  !(__VERIFIER_nondet_int())
[L537]              p->h = 3
[L538]              p = a
[L539]  COND TRUE   \read(flag)
[L540]  EXPR        p->h
[L540]  COND FALSE  !(p->h == 2)
[L545]  EXPR        p->h
[L545]  COND TRUE   p->h != 3
[L546]              __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 9 procedures, 48 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 6, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 120 SDtfs, 73 SDslu, 178 SDs, 0 SdLazy, 288 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=5, 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, 5 MinimizatonAttempts, 40 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 116 NumberOfCodeBlocks, 116 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 88 ConstructedInterpolants, 0 QuantifiedInterpolants, 4694 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 6/6 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...