/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test12.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 16:01:17,696 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 16:01:17,701 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 16:01:17,749 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 16:01:17,749 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 16:01:17,761 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 16:01:17,762 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-09-24 16:01:17,766 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-09-24 16:01:17,768 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-09-24 16:01:17,772 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-09-24 16:01:17,774 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 16:01:17,774 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 16:01:17,777 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 16:01:17,780 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 16:01:17,782 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 16:01:17,783 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 16:01:17,785 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 16:01:17,786 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 16:01:17,794 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 16:01:17,796 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 16:01:17,797 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 16:01:17,798 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 16:01:17,799 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 16:01:17,803 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 16:01:17,803 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 16:01:17,803 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 16:01:17,806 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 16:01:17,807 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 16:01:17,808 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 16:01:17,808 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-09-24 16:01:17,809 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-09-24 16:01:17,810 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-09-24 16:01:17,811 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-09-24 16:01:17,812 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 16:01:17,812 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-09-24 16:01:17,813 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-09-24 16:01:17,813 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-09-24 16:01:17,814 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-09-24 16:01:17,815 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-09-24 16:01:17,816 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 16:01:17,817 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
[2020-09-24 16:01:17,864 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 16:01:17,865 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 16:01:17,866 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 16:01:17,867 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 16:01:17,867 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 16:01:17,867 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 16:01:17,868 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 16:01:17,868 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 16:01:17,868 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 16:01:17,868 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 16:01:17,869 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 16:01:17,869 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 16:01:17,870 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 16:01:17,870 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 16:01:17,870 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 16:01:17,870 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 16:01:17,871 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 16:01:17,871 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 16:01:17,871 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 16:01:17,871 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 16:01:17,871 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 16:01:17,872 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 16:01:17,872 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 16:01:17,872 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 16:01:17,872 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 16:01:17,872 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 16:01:17,873 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 16:01:17,873 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 16:01:17,873 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 16:01:17,873 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.rcfgbuilder: Size of a code block -> SingleStatement
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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true;
[2020-09-24 16:01:18,349 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 16:01:18,376 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 16:01:18,380 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 16:01:18,383 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 16:01:18,384 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 16:01:18,385 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test12.c
[2020-09-24 16:01:18,475 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e47dde068/a3fc706c1ddd441cbd53426914167fad/FLAGeb1801b85
[2020-09-24 16:01:19,029 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 16:01:19,030 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test12.c
[2020-09-24 16:01:19,038 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e47dde068/a3fc706c1ddd441cbd53426914167fad/FLAGeb1801b85
[2020-09-24 16:01:19,369 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e47dde068/a3fc706c1ddd441cbd53426914167fad
[2020-09-24 16:01:19,381 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 16:01:19,387 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 16:01:19,388 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 16:01:19,388 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 16:01:19,392 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 16:01:19,393 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:01:19" (1/1) ...
[2020-09-24 16:01:19,398 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@634f0049 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19, skipping insertion in model container
[2020-09-24 16:01:19,398 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:01:19" (1/1) ...
[2020-09-24 16:01:19,407 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 16:01:19,430 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 16:01:19,625 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 16:01:19,636 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 16:01:19,654 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 16:01:19,685 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 16:01:19,685 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19 WrapperNode
[2020-09-24 16:01:19,685 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 16:01:19,686 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 16:01:19,686 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 16:01:19,687 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 16:01:19,703 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19" (1/1) ...
[2020-09-24 16:01:19,703 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19" (1/1) ...
[2020-09-24 16:01:19,711 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19" (1/1) ...
[2020-09-24 16:01:19,712 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19" (1/1) ...
[2020-09-24 16:01:19,717 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19" (1/1) ...
[2020-09-24 16:01:19,719 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19" (1/1) ...
[2020-09-24 16:01:19,720 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19" (1/1) ...
[2020-09-24 16:01:19,722 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 16:01:19,723 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 16:01:19,723 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 16:01:19,723 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 16:01:19,724 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19" (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
[2020-09-24 16:01:19,872 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 16:01:19,872 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 16:01:19,872 INFO  L138     BoogieDeclarations]: Found implementation of procedure equal
[2020-09-24 16:01:19,872 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 16:01:19,873 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 16:01:19,873 INFO  L130     BoogieDeclarations]: Found specification of procedure equal
[2020-09-24 16:01:19,873 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 16:01:19,873 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 16:01:19,873 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-09-24 16:01:19,874 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-09-24 16:01:19,874 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 16:01:19,874 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-09-24 16:01:19,874 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-09-24 16:01:19,874 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-09-24 16:01:20,106 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 16:01:20,107 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-09-24 16:01:20,111 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:01:20 BoogieIcfgContainer
[2020-09-24 16:01:20,112 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 16:01:20,123 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 16:01:20,123 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 16:01:20,127 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 16:01:20,137 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:01:19" (1/3) ...
[2020-09-24 16:01:20,138 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9e31ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:01:20, skipping insertion in model container
[2020-09-24 16:01:20,138 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:01:19" (2/3) ...
[2020-09-24 16:01:20,142 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a9e31ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:01:20, skipping insertion in model container
[2020-09-24 16:01:20,142 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:01:20" (3/3) ...
[2020-09-24 16:01:20,144 INFO  L109   eAbstractionObserver]: Analyzing ICFG test12.c
[2020-09-24 16:01:20,161 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 16:01:20,170 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 16:01:20,192 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 16:01:20,221 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 16:01:20,222 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 16:01:20,222 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 16:01:20,222 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 16:01:20,222 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 16:01:20,222 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 16:01:20,223 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 16:01:20,223 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 16:01:20,245 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states.
[2020-09-24 16:01:20,252 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-09-24 16:01:20,253 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 16:01:20,254 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 16:01:20,254 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [equalErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 16:01:20,260 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 16:01:20,260 INFO  L82        PathProgramCache]: Analyzing trace with hash 923328836, now seen corresponding path program 1 times
[2020-09-24 16:01:20,269 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 16:01:20,269 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781751857]
[2020-09-24 16:01:20,270 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 16:01:20,407 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 16:01:20,413 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 16:01:20,414 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 16:01:20,418 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 16:01:20,433 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 04:01:20 BoogieIcfgContainer
[2020-09-24 16:01:20,433 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 16:01:20,437 INFO  L168              Benchmark]: Toolchain (without parser) took 1052.34 ms. Allocated memory was 143.7 MB in the beginning and 203.9 MB in the end (delta: 60.3 MB). Free memory was 104.9 MB in the beginning and 157.1 MB in the end (delta: -52.2 MB). Peak memory consumption was 8.1 MB. Max. memory is 7.1 GB.
[2020-09-24 16:01:20,438 INFO  L168              Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 143.7 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
[2020-09-24 16:01:20,439 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 297.82 ms. Allocated memory is still 143.7 MB. Free memory was 104.2 MB in the beginning and 94.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB.
[2020-09-24 16:01:20,441 INFO  L168              Benchmark]: Boogie Preprocessor took 35.92 ms. Allocated memory is still 143.7 MB. Free memory was 94.4 MB in the beginning and 92.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB.
[2020-09-24 16:01:20,442 INFO  L168              Benchmark]: RCFGBuilder took 389.27 ms. Allocated memory was 143.7 MB in the beginning and 203.9 MB in the end (delta: 60.3 MB). Free memory was 92.8 MB in the beginning and 170.0 MB in the end (delta: -77.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
[2020-09-24 16:01:20,443 INFO  L168              Benchmark]: TraceAbstraction took 310.95 ms. Allocated memory is still 203.9 MB. Free memory was 169.4 MB in the beginning and 157.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB.
[2020-09-24 16:01:20,447 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.21 ms. Allocated memory is still 143.7 MB. Free memory was 122.8 MB in the beginning and 122.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 297.82 ms. Allocated memory is still 143.7 MB. Free memory was 104.2 MB in the beginning and 94.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 35.92 ms. Allocated memory is still 143.7 MB. Free memory was 94.4 MB in the beginning and 92.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 389.27 ms. Allocated memory was 143.7 MB in the beginning and 203.9 MB in the end (delta: 60.3 MB). Free memory was 92.8 MB in the beginning and 170.0 MB in the end (delta: -77.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 310.95 ms. Allocated memory is still 203.9 MB. Free memory was 169.4 MB in the beginning and 157.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L14]             int a, b;
[L17]  CALL       equal(&a, &b)
[L5]   COND TRUE  a != b
[L10]             __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: No data available, PredicateUnifierStatistics: No data available, 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: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 16 NumberOfCodeBlocks, 16 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 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...