/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/multivar_1-2.c


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


This is Ultimate 0.1.25-c90d42b
[2020-09-24 15:07:52,268 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-09-24 15:07:52,273 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-09-24 15:07:52,322 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-09-24 15:07:52,322 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-09-24 15:07:52,334 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-09-24 15:07:52,335 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-09-24 15:07:52,345 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-09-24 15:07:52,346 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-09-24 15:07:52,349 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-09-24 15:07:52,349 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-09-24 15:07:52,353 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-09-24 15:07:52,355 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-09-24 15:07:52,358 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-09-24 15:07:52,360 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-09-24 15:07:52,361 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-09-24 15:07:52,364 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-09-24 15:07:52,371 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-09-24 15:07:52,373 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-09-24 15:07:52,375 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-09-24 15:07:52,376 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-09-24 15:07:52,377 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-09-24 15:07:52,382 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-09-24 15:07:52,382 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-09-24 15:07:52,383 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-09-24 15:07:52,386 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-09-24 15:07:52,386 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-09-24 15:07:52,387 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-09-24 15:07:52,388 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-09-24 15:07:52,393 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-09-24 15:07:52,393 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-09-24 15:07:52,394 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-09-24 15:07:52,397 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-09-24 15:07:52,398 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 15:07:52,451 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-09-24 15:07:52,451 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-09-24 15:07:52,454 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-09-24 15:07:52,454 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-09-24 15:07:52,454 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-09-24 15:07:52,455 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-09-24 15:07:52,455 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-09-24 15:07:52,455 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-09-24 15:07:52,455 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-09-24 15:07:52,456 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-09-24 15:07:52,456 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-09-24 15:07:52,456 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-09-24 15:07:52,456 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-09-24 15:07:52,456 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-09-24 15:07:52,458 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-09-24 15:07:52,458 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-09-24 15:07:52,458 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-09-24 15:07:52,459 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-09-24 15:07:52,459 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-09-24 15:07:52,459 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-09-24 15:07:52,459 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-09-24 15:07:52,460 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-09-24 15:07:52,460 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-09-24 15:07:52,460 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-09-24 15:07:52,460 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-09-24 15:07:52,461 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-09-24 15:07:52,461 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-09-24 15:07:52,461 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-09-24 15:07:52,461 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-09-24 15:07:52,462 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 -> false
[2020-09-24 15:07:52,973 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-09-24 15:07:53,001 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-09-24 15:07:53,005 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-09-24 15:07:53,007 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-09-24 15:07:53,008 INFO  L275        PluginConnector]: CDTParser initialized
[2020-09-24 15:07:53,009 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/multivar_1-2.c
[2020-09-24 15:07:53,105 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa6d865d/1db8b5d3dc7e48bfadebfbd2d15e0275/FLAG0cced193f
[2020-09-24 15:07:53,624 INFO  L306              CDTParser]: Found 1 translation units.
[2020-09-24 15:07:53,625 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/multivar_1-2.c
[2020-09-24 15:07:53,633 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa6d865d/1db8b5d3dc7e48bfadebfbd2d15e0275/FLAG0cced193f
[2020-09-24 15:07:53,963 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3aa6d865d/1db8b5d3dc7e48bfadebfbd2d15e0275
[2020-09-24 15:07:53,976 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-09-24 15:07:53,981 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-09-24 15:07:53,983 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-09-24 15:07:53,983 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-09-24 15:07:53,987 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-09-24 15:07:53,988 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:53" (1/1) ...
[2020-09-24 15:07:53,991 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c31b5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:53, skipping insertion in model container
[2020-09-24 15:07:53,991 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 03:07:53" (1/1) ...
[2020-09-24 15:07:54,001 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-09-24 15:07:54,024 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-09-24 15:07:54,234 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:07:54,239 INFO  L203         MainTranslator]: Completed pre-run
[2020-09-24 15:07:54,254 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-09-24 15:07:54,269 INFO  L208         MainTranslator]: Completed translation
[2020-09-24 15:07:54,269 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54 WrapperNode
[2020-09-24 15:07:54,270 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-09-24 15:07:54,271 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-09-24 15:07:54,271 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-09-24 15:07:54,271 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-09-24 15:07:54,287 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ...
[2020-09-24 15:07:54,287 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ...
[2020-09-24 15:07:54,293 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ...
[2020-09-24 15:07:54,293 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ...
[2020-09-24 15:07:54,386 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ...
[2020-09-24 15:07:54,394 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ...
[2020-09-24 15:07:54,396 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (1/1) ...
[2020-09-24 15:07:54,398 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-09-24 15:07:54,398 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-09-24 15:07:54,398 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-09-24 15:07:54,399 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-09-24 15:07:54,400 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (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 15:07:54,486 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-09-24 15:07:54,487 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-09-24 15:07:54,487 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-09-24 15:07:54,487 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-09-24 15:07:54,487 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-09-24 15:07:54,488 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-09-24 15:07:54,488 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-09-24 15:07:54,488 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-09-24 15:07:54,488 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-09-24 15:07:54,488 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-09-24 15:07:54,692 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-09-24 15:07:54,693 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-09-24 15:07:54,698 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:54 BoogieIcfgContainer
[2020-09-24 15:07:54,698 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-09-24 15:07:54,700 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-09-24 15:07:54,700 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-09-24 15:07:54,704 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-09-24 15:07:54,705 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 03:07:53" (1/3) ...
[2020-09-24 15:07:54,706 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d26f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:54, skipping insertion in model container
[2020-09-24 15:07:54,707 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 03:07:54" (2/3) ...
[2020-09-24 15:07:54,707 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61d26f2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 03:07:54, skipping insertion in model container
[2020-09-24 15:07:54,707 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 03:07:54" (3/3) ...
[2020-09-24 15:07:54,710 INFO  L109   eAbstractionObserver]: Analyzing ICFG multivar_1-2.c
[2020-09-24 15:07:54,722 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-09-24 15:07:54,734 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-09-24 15:07:54,766 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-09-24 15:07:54,804 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-09-24 15:07:54,804 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-09-24 15:07:54,804 INFO  L377      AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation
[2020-09-24 15:07:54,804 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-09-24 15:07:54,805 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-09-24 15:07:54,805 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-09-24 15:07:54,805 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-09-24 15:07:54,805 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-09-24 15:07:54,830 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states.
[2020-09-24 15:07:54,839 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-09-24 15:07:54,839 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:07:54,841 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:07:54,841 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:07:54,850 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:07:54,850 INFO  L82        PathProgramCache]: Analyzing trace with hash 677098305, now seen corresponding path program 1 times
[2020-09-24 15:07:54,862 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:07:54,862 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314513772]
[2020-09-24 15:07:54,863 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:07:54,959 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:07:54,994 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-09-24 15:07:54,996 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-09-24 15:07:55,002 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-09-24 15:07:55,003 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314513772]
[2020-09-24 15:07:55,005 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-09-24 15:07:55,006 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-09-24 15:07:55,007 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788662199]
[2020-09-24 15:07:55,012 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-09-24 15:07:55,013 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-09-24 15:07:55,031 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-09-24 15:07:55,033 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-24 15:07:55,036 INFO  L87              Difference]: Start difference. First operand 25 states. Second operand 2 states.
[2020-09-24 15:07:55,067 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-09-24 15:07:55,068 INFO  L93              Difference]: Finished difference Result 36 states and 39 transitions.
[2020-09-24 15:07:55,068 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-09-24 15:07:55,070 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 12
[2020-09-24 15:07:55,071 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-09-24 15:07:55,082 INFO  L225             Difference]: With dead ends: 36
[2020-09-24 15:07:55,083 INFO  L226             Difference]: Without dead ends: 19
[2020-09-24 15:07:55,088 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-09-24 15:07:55,111 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2020-09-24 15:07:55,134 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2020-09-24 15:07:55,136 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2020-09-24 15:07:55,137 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions.
[2020-09-24 15:07:55,139 INFO  L78                 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 12
[2020-09-24 15:07:55,140 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-09-24 15:07:55,140 INFO  L479      AbstractCegarLoop]: Abstraction has 19 states and 19 transitions.
[2020-09-24 15:07:55,140 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-09-24 15:07:55,141 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions.
[2020-09-24 15:07:55,141 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-09-24 15:07:55,141 INFO  L414         BasicCegarLoop]: Found error trace
[2020-09-24 15:07:55,142 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-09-24 15:07:55,142 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-09-24 15:07:55,142 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-09-24 15:07:55,143 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-09-24 15:07:55,143 INFO  L82        PathProgramCache]: Analyzing trace with hash 667863095, now seen corresponding path program 1 times
[2020-09-24 15:07:55,143 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-09-24 15:07:55,143 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485163897]
[2020-09-24 15:07:55,144 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-09-24 15:07:55,182 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-09-24 15:07:55,184 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-09-24 15:07:55,185 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-09-24 15:07:55,191 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-09-24 15:07:55,208 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 03:07:55 BoogieIcfgContainer
[2020-09-24 15:07:55,208 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-09-24 15:07:55,211 INFO  L168              Benchmark]: Toolchain (without parser) took 1232.55 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 102.5 MB in the beginning and 149.1 MB in the end (delta: -46.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:55,213 INFO  L168              Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-09-24 15:07:55,214 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 287.73 ms. Allocated memory is still 146.8 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:55,215 INFO  L168              Benchmark]: Boogie Preprocessor took 127.34 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 92.7 MB in the beginning and 182.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:55,216 INFO  L168              Benchmark]: RCFGBuilder took 300.09 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:55,217 INFO  L168              Benchmark]: TraceAbstraction took 508.71 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 149.1 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB.
[2020-09-24 15:07:55,221 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.61 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 287.73 ms. Allocated memory is still 146.8 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 127.34 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 92.7 MB in the beginning and 182.6 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 300.09 ms. Allocated memory is still 203.4 MB. Free memory was 182.6 MB in the beginning and 170.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.0 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 508.71 ms. Allocated memory is still 203.4 MB. Free memory was 169.9 MB in the beginning and 149.1 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L12]              unsigned int x = __VERIFIER_nondet_uint();
[L13]              unsigned int y = x + 1;
[L15]  COND FALSE  !(x < 1024)
[L20]  CALL        __VERIFIER_assert(x == y)
[L5]   COND TRUE   !(cond)
[L6]               __VERIFIER_error()

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 25 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred 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, 0.0s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 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...