/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/ldv-regression/test29-2.c


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


This is Ultimate 0.1.24-fb55353
[2019-11-07 00:27:55,164 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2019-11-07 00:27:55,166 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2019-11-07 00:27:55,183 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2019-11-07 00:27:55,184 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2019-11-07 00:27:55,186 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2019-11-07 00:27:55,187 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2019-11-07 00:27:55,204 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2019-11-07 00:27:55,210 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2019-11-07 00:27:55,212 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2019-11-07 00:27:55,214 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2019-11-07 00:27:55,214 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2019-11-07 00:27:55,216 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2019-11-07 00:27:55,220 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2019-11-07 00:27:55,226 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2019-11-07 00:27:55,228 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2019-11-07 00:27:55,230 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2019-11-07 00:27:55,230 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2019-11-07 00:27:55,234 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
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[2019-11-07 00:27:55,243 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2019-11-07 00:27:55,245 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
[2019-11-07 00:27:55,272 INFO  L113        SettingsManager]: Loading preferences was successful
[2019-11-07 00:27:55,273 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2019-11-07 00:27:55,274 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2019-11-07 00:27:55,274 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2019-11-07 00:27:55,274 INFO  L138        SettingsManager]:  * Use SBE=true
[2019-11-07 00:27:55,275 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2019-11-07 00:27:55,275 INFO  L138        SettingsManager]:  * sizeof long=4
[2019-11-07 00:27:55,275 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2019-11-07 00:27:55,275 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2019-11-07 00:27:55,275 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2019-11-07 00:27:55,275 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2019-11-07 00:27:55,276 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2019-11-07 00:27:55,276 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2019-11-07 00:27:55,276 INFO  L138        SettingsManager]:  * sizeof long double=12
[2019-11-07 00:27:55,276 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2019-11-07 00:27:55,276 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2019-11-07 00:27:55,276 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2019-11-07 00:27:55,277 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2019-11-07 00:27:55,277 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2019-11-07 00:27:55,277 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2019-11-07 00:27:55,277 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2019-11-07 00:27:55,277 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2019-11-07 00:27:55,278 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2019-11-07 00:27:55,278 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2019-11-07 00:27:55,278 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2019-11-07 00:27:55,278 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2019-11-07 00:27:55,278 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2019-11-07 00:27:55,279 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2019-11-07 00:27:55,279 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES
[2019-11-07 00:27:55,552 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2019-11-07 00:27:55,568 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2019-11-07 00:27:55,571 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2019-11-07 00:27:55,573 INFO  L271        PluginConnector]: Initializing CDTParser...
[2019-11-07 00:27:55,574 INFO  L275        PluginConnector]: CDTParser initialized
[2019-11-07 00:27:55,575 INFO  L428   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-2.c
[2019-11-07 00:27:55,654 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c9392a6/2d0a4f889952423991d122022e3a68e4/FLAGbcfeb4d17
[2019-11-07 00:27:56,135 INFO  L306              CDTParser]: Found 1 translation units.
[2019-11-07 00:27:56,136 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-2.c
[2019-11-07 00:27:56,143 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c9392a6/2d0a4f889952423991d122022e3a68e4/FLAGbcfeb4d17
[2019-11-07 00:27:56,539 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c9392a6/2d0a4f889952423991d122022e3a68e4
[2019-11-07 00:27:56,555 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2019-11-07 00:27:56,557 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2019-11-07 00:27:56,567 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2019-11-07 00:27:56,567 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2019-11-07 00:27:56,571 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2019-11-07 00:27:56,576 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:27:56" (1/1) ...
[2019-11-07 00:27:56,583 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60924fff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56, skipping insertion in model container
[2019-11-07 00:27:56,583 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 12:27:56" (1/1) ...
[2019-11-07 00:27:56,593 INFO  L142         MainTranslator]: Starting translation in SV-COMP mode 
[2019-11-07 00:27:56,643 INFO  L173         MainTranslator]: Built tables and reachable declarations
[2019-11-07 00:27:56,871 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 00:27:56,881 INFO  L188         MainTranslator]: Completed pre-run
[2019-11-07 00:27:56,896 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2019-11-07 00:27:56,985 INFO  L192         MainTranslator]: Completed translation
[2019-11-07 00:27:56,986 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56 WrapperNode
[2019-11-07 00:27:56,987 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2019-11-07 00:27:56,987 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2019-11-07 00:27:56,987 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2019-11-07 00:27:56,988 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2019-11-07 00:27:57,000 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56" (1/1) ...
[2019-11-07 00:27:57,000 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56" (1/1) ...
[2019-11-07 00:27:57,006 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56" (1/1) ...
[2019-11-07 00:27:57,006 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56" (1/1) ...
[2019-11-07 00:27:57,013 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56" (1/1) ...
[2019-11-07 00:27:57,016 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56" (1/1) ...
[2019-11-07 00:27:57,020 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56" (1/1) ...
[2019-11-07 00:27:57,022 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2019-11-07 00:27:57,022 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2019-11-07 00:27:57,023 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2019-11-07 00:27:57,023 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2019-11-07 00:27:57,024 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56" (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
[2019-11-07 00:27:57,086 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2019-11-07 00:27:57,087 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2019-11-07 00:27:57,087 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2019-11-07 00:27:57,087 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2019-11-07 00:27:57,087 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2019-11-07 00:27:57,087 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2019-11-07 00:27:57,088 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2019-11-07 00:27:57,088 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2019-11-07 00:27:57,088 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2019-11-07 00:27:57,088 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2019-11-07 00:27:57,088 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2019-11-07 00:27:57,088 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2019-11-07 00:27:57,308 INFO  L279             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2019-11-07 00:27:57,309 INFO  L284             CfgBuilder]: Removed 0 assume(true) statements.
[2019-11-07 00:27:57,310 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:27:57 BoogieIcfgContainer
[2019-11-07 00:27:57,310 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2019-11-07 00:27:57,311 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2019-11-07 00:27:57,311 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2019-11-07 00:27:57,314 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2019-11-07 00:27:57,315 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 12:27:56" (1/3) ...
[2019-11-07 00:27:57,315 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cb182d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:27:57, skipping insertion in model container
[2019-11-07 00:27:57,316 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 12:27:56" (2/3) ...
[2019-11-07 00:27:57,316 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cb182d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 12:27:57, skipping insertion in model container
[2019-11-07 00:27:57,316 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 12:27:57" (3/3) ...
[2019-11-07 00:27:57,318 INFO  L109   eAbstractionObserver]: Analyzing ICFG test29-2.c
[2019-11-07 00:27:57,328 INFO  L152   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION
[2019-11-07 00:27:57,335 INFO  L164   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2019-11-07 00:27:57,347 INFO  L249      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2019-11-07 00:27:57,371 INFO  L373      AbstractCegarLoop]: Interprodecural is true
[2019-11-07 00:27:57,371 INFO  L374      AbstractCegarLoop]: Hoare is true
[2019-11-07 00:27:57,372 INFO  L375      AbstractCegarLoop]: Compute interpolants for FPandBP
[2019-11-07 00:27:57,372 INFO  L376      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2019-11-07 00:27:57,372 INFO  L377      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2019-11-07 00:27:57,372 INFO  L378      AbstractCegarLoop]: Difference is false
[2019-11-07 00:27:57,372 INFO  L379      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2019-11-07 00:27:57,373 INFO  L383      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2019-11-07 00:27:57,386 INFO  L276                IsEmpty]: Start isEmpty. Operand 18 states.
[2019-11-07 00:27:57,390 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2019-11-07 00:27:57,391 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 00:27:57,391 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-07 00:27:57,393 INFO  L410      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 00:27:57,399 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 00:27:57,399 INFO  L82        PathProgramCache]: Analyzing trace with hash 668850033, now seen corresponding path program 1 times
[2019-11-07 00:27:57,407 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-07 00:27:57,407 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401367390]
[2019-11-07 00:27:57,407 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 00:27:57,498 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 00:27:57,594 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 00:27:57,594 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401367390]
[2019-11-07 00:27:57,595 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 00:27:57,596 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2019-11-07 00:27:57,597 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720394296]
[2019-11-07 00:27:57,602 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 4 states
[2019-11-07 00:27:57,608 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-07 00:27:57,638 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2019-11-07 00:27:57,639 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-11-07 00:27:57,659 INFO  L87              Difference]: Start difference. First operand 18 states. Second operand 4 states.
[2019-11-07 00:27:57,746 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 00:27:57,746 INFO  L93              Difference]: Finished difference Result 34 states and 41 transitions.
[2019-11-07 00:27:57,747 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2019-11-07 00:27:57,749 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 13
[2019-11-07 00:27:57,750 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 00:27:57,757 INFO  L225             Difference]: With dead ends: 34
[2019-11-07 00:27:57,758 INFO  L226             Difference]: Without dead ends: 21
[2019-11-07 00:27:57,760 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12
[2019-11-07 00:27:57,774 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2019-11-07 00:27:57,789 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 16.
[2019-11-07 00:27:57,791 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2019-11-07 00:27:57,791 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions.
[2019-11-07 00:27:57,793 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13
[2019-11-07 00:27:57,793 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 00:27:57,793 INFO  L462      AbstractCegarLoop]: Abstraction has 16 states and 18 transitions.
[2019-11-07 00:27:57,794 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2019-11-07 00:27:57,794 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions.
[2019-11-07 00:27:57,794 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2019-11-07 00:27:57,795 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 00:27:57,795 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-07 00:27:57,795 INFO  L410      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 00:27:57,796 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 00:27:57,796 INFO  L82        PathProgramCache]: Analyzing trace with hash 667002991, now seen corresponding path program 1 times
[2019-11-07 00:27:57,796 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-07 00:27:57,797 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515843512]
[2019-11-07 00:27:57,797 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 00:27:57,824 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 00:27:57,899 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 00:27:57,899 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515843512]
[2019-11-07 00:27:57,899 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 00:27:57,901 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-11-07 00:27:57,901 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954637299]
[2019-11-07 00:27:57,903 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-11-07 00:27:57,903 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-07 00:27:57,903 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-11-07 00:27:57,904 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2019-11-07 00:27:57,904 INFO  L87              Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states.
[2019-11-07 00:27:58,016 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 00:27:58,017 INFO  L93              Difference]: Finished difference Result 23 states and 25 transitions.
[2019-11-07 00:27:58,017 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2019-11-07 00:27:58,017 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 13
[2019-11-07 00:27:58,018 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 00:27:58,018 INFO  L225             Difference]: With dead ends: 23
[2019-11-07 00:27:58,019 INFO  L226             Difference]: Without dead ends: 14
[2019-11-07 00:27:58,020 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72
[2019-11-07 00:27:58,020 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2019-11-07 00:27:58,023 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14.
[2019-11-07 00:27:58,023 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14 states.
[2019-11-07 00:27:58,024 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions.
[2019-11-07 00:27:58,024 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13
[2019-11-07 00:27:58,025 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 00:27:58,025 INFO  L462      AbstractCegarLoop]: Abstraction has 14 states and 13 transitions.
[2019-11-07 00:27:58,025 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-11-07 00:27:58,025 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions.
[2019-11-07 00:27:58,026 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2019-11-07 00:27:58,026 INFO  L402         BasicCegarLoop]: Found error trace
[2019-11-07 00:27:58,026 INFO  L410         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2019-11-07 00:27:58,026 INFO  L410      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2019-11-07 00:27:58,027 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2019-11-07 00:27:58,027 INFO  L82        PathProgramCache]: Analyzing trace with hash -1851109901, now seen corresponding path program 1 times
[2019-11-07 00:27:58,027 INFO  L161   FreeRefinementEngine]: Executing refinement strategy TAIPAN
[2019-11-07 00:27:58,027 INFO  L337   FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565052210]
[2019-11-07 00:27:58,028 INFO  L94    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2019-11-07 00:27:58,043 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2019-11-07 00:27:58,158 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2019-11-07 00:27:58,160 INFO  L337   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565052210]
[2019-11-07 00:27:58,160 INFO  L218   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2019-11-07 00:27:58,161 INFO  L231   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2019-11-07 00:27:58,161 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418824680]
[2019-11-07 00:27:58,161 INFO  L442      AbstractCegarLoop]: Interpolant automaton has 7 states
[2019-11-07 00:27:58,162 INFO  L141   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN
[2019-11-07 00:27:58,162 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2019-11-07 00:27:58,163 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2019-11-07 00:27:58,166 INFO  L87              Difference]: Start difference. First operand 14 states and 13 transitions. Second operand 7 states.
[2019-11-07 00:27:58,220 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2019-11-07 00:27:58,220 INFO  L93              Difference]: Finished difference Result 14 states and 13 transitions.
[2019-11-07 00:27:58,220 INFO  L142   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2019-11-07 00:27:58,220 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 13
[2019-11-07 00:27:58,221 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2019-11-07 00:27:58,221 INFO  L225             Difference]: With dead ends: 14
[2019-11-07 00:27:58,221 INFO  L226             Difference]: Without dead ends: 0
[2019-11-07 00:27:58,222 INFO  L630         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2019-11-07 00:27:58,222 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2019-11-07 00:27:58,222 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2019-11-07 00:27:58,222 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2019-11-07 00:27:58,222 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2019-11-07 00:27:58,223 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13
[2019-11-07 00:27:58,223 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2019-11-07 00:27:58,223 INFO  L462      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2019-11-07 00:27:58,223 INFO  L463      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2019-11-07 00:27:58,223 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2019-11-07 00:27:58,223 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2019-11-07 00:27:58,229 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2019-11-07 00:27:58,248 INFO  L443   ceAbstractionStarter]: For program point  ULTIMATE.initFINAL(line -1)  no Hoare annotation was computed.
[2019-11-07 00:27:58,249 INFO  L446   ceAbstractionStarter]: At program point  ULTIMATE.initENTRY(line -1)  the Hoare annotation is:  true
[2019-11-07 00:27:58,249 INFO  L443   ceAbstractionStarter]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2019-11-07 00:27:58,249 INFO  L443   ceAbstractionStarter]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2019-11-07 00:27:58,249 INFO  L446   ceAbstractionStarter]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2019-11-07 00:27:58,250 INFO  L446   ceAbstractionStarter]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2019-11-07 00:27:58,250 INFO  L443   ceAbstractionStarter]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2019-11-07 00:27:58,250 INFO  L443   ceAbstractionStarter]: For program point  mainEXIT(lines 11 29)  no Hoare annotation was computed.
[2019-11-07 00:27:58,250 INFO  L443   ceAbstractionStarter]: For program point  L21(line 21)  no Hoare annotation was computed.
[2019-11-07 00:27:58,251 INFO  L443   ceAbstractionStarter]: For program point  L21-2(lines 21 23)  no Hoare annotation was computed.
[2019-11-07 00:27:58,251 INFO  L443   ceAbstractionStarter]: For program point  L15(line 15)  no Hoare annotation was computed.
[2019-11-07 00:27:58,251 INFO  L443   ceAbstractionStarter]: For program point  L15-2(line 15)  no Hoare annotation was computed.
[2019-11-07 00:27:58,251 INFO  L443   ceAbstractionStarter]: For program point  mainFINAL(lines 11 29)  no Hoare annotation was computed.
[2019-11-07 00:27:58,251 INFO  L446   ceAbstractionStarter]: At program point  mainENTRY(lines 11 29)  the Hoare annotation is:  true
[2019-11-07 00:27:58,252 INFO  L439   ceAbstractionStarter]: At program point  L22(lines 12 29)  the Hoare annotation is:  false
[2019-11-07 00:27:58,252 INFO  L443   ceAbstractionStarter]: For program point  L16(lines 16 20)  no Hoare annotation was computed.
[2019-11-07 00:27:58,252 INFO  L443   ceAbstractionStarter]: For program point  L16-2(lines 16 20)  no Hoare annotation was computed.
[2019-11-07 00:27:58,252 INFO  L443   ceAbstractionStarter]: For program point  mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 27)  no Hoare annotation was computed.
[2019-11-07 00:27:58,262 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 12:27:58 BoogieIcfgContainer
[2019-11-07 00:27:58,263 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2019-11-07 00:27:58,266 INFO  L168              Benchmark]: Toolchain (without parser) took 1708.04 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 103.7 MB in the beginning and 106.6 MB in the end (delta: -2.9 MB). Peak memory consumption was 59.5 MB. Max. memory is 7.1 GB.
[2019-11-07 00:27:58,268 INFO  L168              Benchmark]: CDTParser took 1.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2019-11-07 00:27:58,271 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 420.12 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 103.5 MB in the beginning and 181.4 MB in the end (delta: -77.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB.
[2019-11-07 00:27:58,273 INFO  L168              Benchmark]: Boogie Preprocessor took 34.78 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 179.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB.
[2019-11-07 00:27:58,274 INFO  L168              Benchmark]: RCFGBuilder took 287.75 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 166.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB.
[2019-11-07 00:27:58,276 INFO  L168              Benchmark]: TraceAbstraction took 951.57 ms. Allocated memory is still 202.4 MB. Free memory was 165.5 MB in the beginning and 106.6 MB in the end (delta: 58.9 MB). Peak memory consumption was 58.9 MB. Max. memory is 7.1 GB.
[2019-11-07 00:27:58,285 INFO  L335   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 1.23 ms. Allocated memory is still 140.0 MB. Free memory was 121.9 MB in the beginning and 121.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 420.12 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 103.5 MB in the beginning and 181.4 MB in the end (delta: -77.9 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 34.78 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 179.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 287.75 ms. Allocated memory is still 202.4 MB. Free memory was 179.1 MB in the beginning and 166.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 951.57 ms. Allocated memory is still 202.4 MB. Free memory was 165.5 MB in the beginning and 106.6 MB in the end (delta: 58.9 MB). Peak memory consumption was 58.9 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 27]: call of __VERIFIER_error() unreachable
    For all program executions holds that call of __VERIFIER_error() unreachable at this location
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - InvariantResult [Line: 12]: Loop Invariant
    Derived loop invariant: 0
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 3 procedures, 18 locations, 1 error locations. Result: SAFE, OverallTime: 0.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 31 SDtfs, 28 SDslu, 72 SDs, 0 SdLazy, 73 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 5 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 1212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...