/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c
--------------------------------------------------------------------------------
This is Ultimate 0.2.1-dev-b7b32d2
[2021-02-21 15:49:41,838 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2021-02-21 15:49:41,841 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2021-02-21 15:49:41,876 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2021-02-21 15:49:41,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2021-02-21 15:49:41,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2021-02-21 15:49:41,880 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2021-02-21 15:49:41,882 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2021-02-21 15:49:41,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2021-02-21 15:49:41,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2021-02-21 15:49:41,892 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2021-02-21 15:49:41,893 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2021-02-21 15:49:41,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2021-02-21 15:49:41,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2021-02-21 15:49:41,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2021-02-21 15:49:41,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2021-02-21 15:49:41,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2021-02-21 15:49:41,905 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2021-02-21 15:49:41,911 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2021-02-21 15:49:41,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2021-02-21 15:49:41,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2021-02-21 15:49:41,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2021-02-21 15:49:41,936 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2021-02-21 15:49:41,937 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2021-02-21 15:49:41,940 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2021-02-21 15:49:41,941 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2021-02-21 15:49:41,941 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2021-02-21 15:49:41,942 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2021-02-21 15:49:41,943 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2021-02-21 15:49:41,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2021-02-21 15:49:41,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2021-02-21 15:49:41,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2021-02-21 15:49:41,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2021-02-21 15:49:41,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2021-02-21 15:49:41,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2021-02-21 15:49:41,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
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[2021-02-21 15:49:41,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
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[2021-02-21 15:49:41,952 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2021-02-21 15:49:41,953 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
[2021-02-21 15:49:41,980 INFO L113 SettingsManager]: Loading preferences was successful
[2021-02-21 15:49:41,980 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2021-02-21 15:49:41,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2021-02-21 15:49:41,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2021-02-21 15:49:41,982 INFO L138 SettingsManager]: * Use SBE=true
[2021-02-21 15:49:41,982 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2021-02-21 15:49:41,983 INFO L138 SettingsManager]: * sizeof long=4
[2021-02-21 15:49:41,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2021-02-21 15:49:41,983 INFO L138 SettingsManager]: * sizeof POINTER=4
[2021-02-21 15:49:41,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2021-02-21 15:49:41,983 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2021-02-21 15:49:41,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2021-02-21 15:49:41,984 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2021-02-21 15:49:41,984 INFO L138 SettingsManager]: * sizeof long double=12
[2021-02-21 15:49:41,984 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2021-02-21 15:49:41,984 INFO L138 SettingsManager]: * Use constant arrays=true
[2021-02-21 15:49:41,985 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2021-02-21 15:49:41,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2021-02-21 15:49:41,985 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2021-02-21 15:49:41,985 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2021-02-21 15:49:41,985 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2021-02-21 15:49:41,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2021-02-21 15:49:41,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2021-02-21 15:49:41,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2021-02-21 15:49:41,986 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2021-02-21 15:49:41,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2021-02-21 15:49:41,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2021-02-21 15:49:41,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2021-02-21 15:49:41,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2021-02-21 15:49:42,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp
[2021-02-21 15:49:42,425 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2021-02-21 15:49:42,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2021-02-21 15:49:42,430 INFO L271 PluginConnector]: Initializing CDTParser...
[2021-02-21 15:49:42,431 INFO L275 PluginConnector]: CDTParser initialized
[2021-02-21 15:49:42,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c
[2021-02-21 15:49:42,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04722702/4fe410c62d2b4c7d9dd3d12b84bbd1e7/FLAG45be26611
[2021-02-21 15:49:43,259 INFO L306 CDTParser]: Found 1 translation units.
[2021-02-21 15:49:43,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c
[2021-02-21 15:49:43,267 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04722702/4fe410c62d2b4c7d9dd3d12b84bbd1e7/FLAG45be26611
[2021-02-21 15:49:43,638 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d04722702/4fe410c62d2b4c7d9dd3d12b84bbd1e7
[2021-02-21 15:49:43,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2021-02-21 15:49:43,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2021-02-21 15:49:43,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2021-02-21 15:49:43,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2021-02-21 15:49:43,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2021-02-21 15:49:43,666 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:49:43" (1/1) ...
[2021-02-21 15:49:43,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49731d71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43, skipping insertion in model container
[2021-02-21 15:49:43,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 03:49:43" (1/1) ...
[2021-02-21 15:49:43,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2021-02-21 15:49:43,693 INFO L178 MainTranslator]: Built tables and reachable declarations
[2021-02-21 15:49:43,875 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c[354,367]
[2021-02-21 15:49:43,881 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c[442,455]
[2021-02-21 15:49:43,882 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-21 15:49:43,895 INFO L203 MainTranslator]: Completed pre-run
[2021-02-21 15:49:43,913 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c[354,367]
[2021-02-21 15:49:43,915 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/afterrec_2calls-1.c[442,455]
[2021-02-21 15:49:43,916 INFO L206 PostProcessor]: Analyzing one entry point: main
[2021-02-21 15:49:43,934 INFO L208 MainTranslator]: Completed translation
[2021-02-21 15:49:43,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43 WrapperNode
[2021-02-21 15:49:43,935 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2021-02-21 15:49:43,937 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2021-02-21 15:49:43,937 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2021-02-21 15:49:43,937 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2021-02-21 15:49:43,953 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43" (1/1) ...
[2021-02-21 15:49:43,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43" (1/1) ...
[2021-02-21 15:49:43,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43" (1/1) ...
[2021-02-21 15:49:43,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43" (1/1) ...
[2021-02-21 15:49:43,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43" (1/1) ...
[2021-02-21 15:49:43,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43" (1/1) ...
[2021-02-21 15:49:43,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43" (1/1) ...
[2021-02-21 15:49:43,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2021-02-21 15:49:43,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2021-02-21 15:49:43,976 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2021-02-21 15:49:43,976 INFO L275 PluginConnector]: RCFGBuilder initialized
[2021-02-21 15:49:43,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43" (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
[2021-02-21 15:49:44,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2021-02-21 15:49:44,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2021-02-21 15:49:44,088 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error
[2021-02-21 15:49:44,089 INFO L138 BoogieDeclarations]: Found implementation of procedure f
[2021-02-21 15:49:44,089 INFO L138 BoogieDeclarations]: Found implementation of procedure f2
[2021-02-21 15:49:44,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2021-02-21 15:49:44,089 INFO L130 BoogieDeclarations]: Found specification of procedure abort
[2021-02-21 15:49:44,089 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail
[2021-02-21 15:49:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error
[2021-02-21 15:49:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2021-02-21 15:49:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure f
[2021-02-21 15:49:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure f2
[2021-02-21 15:49:44,090 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2021-02-21 15:49:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2021-02-21 15:49:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int
[2021-02-21 15:49:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2021-02-21 15:49:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int
[2021-02-21 15:49:44,091 INFO L130 BoogieDeclarations]: Found specification of procedure read~int
[2021-02-21 15:49:44,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2021-02-21 15:49:44,430 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2021-02-21 15:49:44,431 INFO L299 CfgBuilder]: Removed 0 assume(true) statements.
[2021-02-21 15:49:44,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:49:44 BoogieIcfgContainer
[2021-02-21 15:49:44,433 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2021-02-21 15:49:44,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2021-02-21 15:49:44,438 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2021-02-21 15:49:44,442 INFO L275 PluginConnector]: TraceAbstraction initialized
[2021-02-21 15:49:44,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 03:49:43" (1/3) ...
[2021-02-21 15:49:44,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6f1c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:49:44, skipping insertion in model container
[2021-02-21 15:49:44,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 03:49:43" (2/3) ...
[2021-02-21 15:49:44,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6f1c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 03:49:44, skipping insertion in model container
[2021-02-21 15:49:44,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 03:49:44" (3/3) ...
[2021-02-21 15:49:44,447 INFO L111 eAbstractionObserver]: Analyzing ICFG afterrec_2calls-1.c
[2021-02-21 15:49:44,454 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2021-02-21 15:49:44,459 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations.
[2021-02-21 15:49:44,534 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations.
[2021-02-21 15:49:44,562 INFO L376 AbstractCegarLoop]: Interprodecural is true
[2021-02-21 15:49:44,562 INFO L377 AbstractCegarLoop]: Hoare is true
[2021-02-21 15:49:44,562 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP
[2021-02-21 15:49:44,562 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2021-02-21 15:49:44,562 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2021-02-21 15:49:44,562 INFO L381 AbstractCegarLoop]: Difference is false
[2021-02-21 15:49:44,563 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2021-02-21 15:49:44,563 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2021-02-21 15:49:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states.
[2021-02-21 15:49:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2021-02-21 15:49:44,587 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 15:49:44,588 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-21 15:49:44,588 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 15:49:44,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 15:49:44,595 INFO L82 PathProgramCache]: Analyzing trace with hash -900640831, now seen corresponding path program 1 times
[2021-02-21 15:49:44,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-02-21 15:49:44,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45906491]
[2021-02-21 15:49:44,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 15:49:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 15:49:44,797 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 15:49:44,799 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 15:49:44,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 15:49:44,802 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 15:49:44,821 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 15:49:44,822 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 15:49:44,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 15:49:44,838 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 15:49:44,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 15:49:44,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 15:49:44,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2021-02-21 15:49:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 15:49:44,950 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 15:49:44,951 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1
[2021-02-21 15:49:44,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8
[2021-02-21 15:49:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat
[2021-02-21 15:49:44,975 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 15:49:44,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 15:49:44,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size
[2021-02-21 15:49:44,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3
[2021-02-21 15:49:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2021-02-21 15:49:45,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45906491]
[2021-02-21 15:49:45,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2021-02-21 15:49:45,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2021-02-21 15:49:45,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261289390]
[2021-02-21 15:49:45,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states
[2021-02-21 15:49:45,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL
[2021-02-21 15:49:45,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2021-02-21 15:49:45,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2021-02-21 15:49:45,056 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 8 states.
[2021-02-21 15:49:45,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2021-02-21 15:49:45,395 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions.
[2021-02-21 15:49:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2021-02-21 15:49:45,397 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14
[2021-02-21 15:49:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2021-02-21 15:49:45,406 INFO L225 Difference]: With dead ends: 35
[2021-02-21 15:49:45,407 INFO L226 Difference]: Without dead ends: 23
[2021-02-21 15:49:45,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156
[2021-02-21 15:49:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states.
[2021-02-21 15:49:45,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23.
[2021-02-21 15:49:45,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states.
[2021-02-21 15:49:45,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions.
[2021-02-21 15:49:45,458 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 14
[2021-02-21 15:49:45,459 INFO L84 Accepts]: Finished accepts. word is rejected.
[2021-02-21 15:49:45,459 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions.
[2021-02-21 15:49:45,459 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2021-02-21 15:49:45,459 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions.
[2021-02-21 15:49:45,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18
[2021-02-21 15:49:45,460 INFO L414 BasicCegarLoop]: Found error trace
[2021-02-21 15:49:45,460 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2021-02-21 15:49:45,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2021-02-21 15:49:45,461 INFO L428 AbstractCegarLoop]: === Iteration 2 === [fErr0ASSERT_VIOLATIONERROR_FUNCTION, f2Err0ASSERT_VIOLATIONERROR_FUNCTION]===
[2021-02-21 15:49:45,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2021-02-21 15:49:45,462 INFO L82 PathProgramCache]: Analyzing trace with hash 817530876, now seen corresponding path program 1 times
[2021-02-21 15:49:45,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL
[2021-02-21 15:49:45,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388918777]
[2021-02-21 15:49:45,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2021-02-21 15:49:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 15:49:45,490 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 15:49:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat
[2021-02-21 15:49:45,512 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2021-02-21 15:49:45,538 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace
[2021-02-21 15:49:45,539 INFO L523 BasicCegarLoop]: Counterexample might be feasible
[2021-02-21 15:49:45,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2021-02-21 15:49:45,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 03:49:45 BoogieIcfgContainer
[2021-02-21 15:49:45,570 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2021-02-21 15:49:45,572 INFO L168 Benchmark]: Toolchain (without parser) took 1927.12 ms. Allocated memory is still 151.0 MB. Free memory was 127.3 MB in the beginning and 64.5 MB in the end (delta: 62.8 MB). Peak memory consumption was 62.4 MB. Max. memory is 8.0 GB.
[2021-02-21 15:49:45,573 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.3 MB in the end (delta: 435.3 kB). There was no memory consumed. Max. memory is 8.0 GB.
[2021-02-21 15:49:45,574 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.20 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 117.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2021-02-21 15:49:45,575 INFO L168 Benchmark]: Boogie Preprocessor took 37.80 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2021-02-21 15:49:45,576 INFO L168 Benchmark]: RCFGBuilder took 457.71 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 103.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB.
[2021-02-21 15:49:45,577 INFO L168 Benchmark]: TraceAbstraction took 1131.92 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 64.5 MB in the end (delta: 38.3 MB). Peak memory consumption was 38.3 MB. Max. memory is 8.0 GB.
[2021-02-21 15:49:45,581 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.29 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 123.3 MB in the end (delta: 435.3 kB). There was no memory consumed. Max. memory is 8.0 GB.
* CACSL2BoogieTranslator took 279.20 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 117.0 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
* Boogie Preprocessor took 37.80 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
* RCFGBuilder took 457.71 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 103.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB.
* TraceAbstraction took 1131.92 ms. Allocated memory is still 151.0 MB. Free memory was 102.8 MB in the beginning and 64.5 MB in the end (delta: 38.3 MB). Peak memory consumption was 38.3 MB. Max. memory is 8.0 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- CounterExampleResult [Line: 19]: a call to reach_error is reachable
a call to reach_error is reachable
We found a FailurePath:
[L23] CALL f(4)
VAL [\old(n)=4]
[L9] COND FALSE !(n<3)
[L10] n--
VAL [\old(n)=4, n=3]
[L11] CALL f2(n)
VAL [\old(n)=3]
[L16] COND FALSE !(n<3)
[L17] n--
VAL [\old(n)=3, n=2]
[L18] CALL f(n)
VAL [\old(n)=2]
[L9] COND TRUE n<3
VAL [\old(n)=2, n=2]
[L18] RET f(n)
VAL [\old(n)=3, n=2]
[L19] reach_error()
VAL [\old(n)=3, n=2]
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 6 procedures, 27 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 SDtfs, 13 SDslu, 33 SDs, 0 SdLazy, 71 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 715 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...