/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-new/half.i


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


This is Ultimate 0.2.0-7d8eed3
[2020-11-07 02:09:36,127 INFO  L177        SettingsManager]: Resetting all preferences to default values...
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[2020-11-07 02:09:36,196 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-11-07 02:09:36,204 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
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[2020-11-07 02:09:36,257 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf
[2020-11-07 02:09:36,284 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-11-07 02:09:36,285 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-11-07 02:09:36,289 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-11-07 02:09:36,289 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-11-07 02:09:36,289 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-11-07 02:09:36,290 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-11-07 02:09:36,290 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-11-07 02:09:36,290 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-11-07 02:09:36,290 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-11-07 02:09:36,290 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-11-07 02:09:36,292 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-11-07 02:09:36,292 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-11-07 02:09:36,292 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-11-07 02:09:36,293 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-11-07 02:09:36,294 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-11-07 02:09:36,294 INFO  L138        SettingsManager]:  * Size of a code block=SingleStatement
[2020-11-07 02:09:36,294 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-11-07 02:09:36,294 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-11-07 02:09:36,295 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-11-07 02:09:36,295 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-11-07 02:09:36,295 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=AcceleratedInterpolation
[2020-11-07 02:09:36,295 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-11-07 02:09:36,295 INFO  L138        SettingsManager]:  * Use separate solver for trace checks=false
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
[2020-11-07 02:09:36,700 INFO  L75    nceAwareModelManager]: Repository-Root is: /tmp
[2020-11-07 02:09:36,733 INFO  L261   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-11-07 02:09:36,737 INFO  L217   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-11-07 02:09:36,738 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-11-07 02:09:36,739 INFO  L275        PluginConnector]: CDTParser initialized
[2020-11-07 02:09:36,740 INFO  L432   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i
[2020-11-07 02:09:36,839 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23e5e9f7d/7821646665fe4bc986268810d8da1517/FLAG445e05332
[2020-11-07 02:09:37,591 INFO  L306              CDTParser]: Found 1 translation units.
[2020-11-07 02:09:37,592 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i
[2020-11-07 02:09:37,601 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23e5e9f7d/7821646665fe4bc986268810d8da1517/FLAG445e05332
[2020-11-07 02:09:37,927 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23e5e9f7d/7821646665fe4bc986268810d8da1517
[2020-11-07 02:09:37,937 INFO  L299   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-11-07 02:09:37,947 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-11-07 02:09:37,953 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-11-07 02:09:37,953 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-11-07 02:09:37,957 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-11-07 02:09:37,958 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:37" (1/1) ...
[2020-11-07 02:09:37,962 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3470b7be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:37, skipping insertion in model container
[2020-11-07 02:09:37,962 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:37" (1/1) ...
[2020-11-07 02:09:37,971 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-11-07 02:09:37,990 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-11-07 02:09:38,205 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-11-07 02:09:38,216 INFO  L203         MainTranslator]: Completed pre-run
[2020-11-07 02:09:38,234 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-11-07 02:09:38,251 INFO  L208         MainTranslator]: Completed translation
[2020-11-07 02:09:38,252 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38 WrapperNode
[2020-11-07 02:09:38,252 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-11-07 02:09:38,254 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-11-07 02:09:38,254 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-11-07 02:09:38,254 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-11-07 02:09:38,267 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38" (1/1) ...
[2020-11-07 02:09:38,267 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38" (1/1) ...
[2020-11-07 02:09:38,275 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38" (1/1) ...
[2020-11-07 02:09:38,276 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38" (1/1) ...
[2020-11-07 02:09:38,282 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38" (1/1) ...
[2020-11-07 02:09:38,287 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38" (1/1) ...
[2020-11-07 02:09:38,289 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38" (1/1) ...
[2020-11-07 02:09:38,291 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-11-07 02:09:38,292 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-11-07 02:09:38,293 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-11-07 02:09:38,293 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-11-07 02:09:38,294 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38" (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
[2020-11-07 02:09:38,379 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-11-07 02:09:38,380 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-11-07 02:09:38,381 INFO  L138     BoogieDeclarations]: Found implementation of procedure reach_error
[2020-11-07 02:09:38,381 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-11-07 02:09:38,381 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-11-07 02:09:38,381 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-11-07 02:09:38,382 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-11-07 02:09:38,382 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_fail
[2020-11-07 02:09:38,382 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert_perror_fail
[2020-11-07 02:09:38,382 INFO  L130     BoogieDeclarations]: Found specification of procedure __assert
[2020-11-07 02:09:38,383 INFO  L130     BoogieDeclarations]: Found specification of procedure reach_error
[2020-11-07 02:09:38,383 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-11-07 02:09:38,383 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-11-07 02:09:38,383 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-11-07 02:09:38,383 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-11-07 02:09:38,384 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-11-07 02:09:38,384 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-11-07 02:09:38,384 INFO  L130     BoogieDeclarations]: Found specification of procedure write~init~int
[2020-11-07 02:09:38,385 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-11-07 02:09:38,385 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-11-07 02:09:38,386 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-11-07 02:09:38,386 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-11-07 02:09:38,800 INFO  L293             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-11-07 02:09:38,801 INFO  L298             CfgBuilder]: Removed 1 assume(true) statements.
[2020-11-07 02:09:38,806 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:38 BoogieIcfgContainer
[2020-11-07 02:09:38,807 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-11-07 02:09:38,809 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-11-07 02:09:38,809 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-11-07 02:09:38,859 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-11-07 02:09:38,859 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:37" (1/3) ...
[2020-11-07 02:09:38,860 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ea0367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:38, skipping insertion in model container
[2020-11-07 02:09:38,861 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:38" (2/3) ...
[2020-11-07 02:09:38,861 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ea0367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:38, skipping insertion in model container
[2020-11-07 02:09:38,861 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:38" (3/3) ...
[2020-11-07 02:09:38,863 INFO  L111   eAbstractionObserver]: Analyzing ICFG half.i
[2020-11-07 02:09:38,882 INFO  L179   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION
[2020-11-07 02:09:38,886 INFO  L191   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-11-07 02:09:38,900 INFO  L253      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-11-07 02:09:38,929 INFO  L377      AbstractCegarLoop]: Interprodecural is true
[2020-11-07 02:09:38,929 INFO  L378      AbstractCegarLoop]: Hoare is true
[2020-11-07 02:09:38,930 INFO  L379      AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation
[2020-11-07 02:09:38,930 INFO  L380      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-11-07 02:09:38,930 INFO  L381      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-11-07 02:09:38,930 INFO  L382      AbstractCegarLoop]: Difference is false
[2020-11-07 02:09:38,930 INFO  L383      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-11-07 02:09:38,931 INFO  L387      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-11-07 02:09:38,950 INFO  L276                IsEmpty]: Start isEmpty. Operand 45 states.
[2020-11-07 02:09:38,962 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-11-07 02:09:38,962 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 02:09:38,964 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-07 02:09:38,964 INFO  L429      AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 02:09:38,971 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 02:09:38,971 INFO  L82        PathProgramCache]: Analyzing trace with hash 340170805, now seen corresponding path program 1 times
[2020-11-07 02:09:38,982 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 02:09:38,983 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153104937]
[2020-11-07 02:09:38,984 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 02:09:39,072 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 02:09:39,135 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:39,260 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-11-07 02:09:39,267 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:39,286 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-07 02:09:39,288 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153104937]
[2020-11-07 02:09:39,291 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-07 02:09:39,291 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-11-07 02:09:39,291 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107699517]
[2020-11-07 02:09:39,297 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-11-07 02:09:39,297 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-11-07 02:09:39,313 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-11-07 02:09:39,314 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-11-07 02:09:39,316 INFO  L87              Difference]: Start difference. First operand 45 states. Second operand 3 states.
[2020-11-07 02:09:39,444 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-07 02:09:39,444 INFO  L93              Difference]: Finished difference Result 59 states and 67 transitions.
[2020-11-07 02:09:39,446 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-11-07 02:09:39,447 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 25
[2020-11-07 02:09:39,448 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-07 02:09:39,457 INFO  L225             Difference]: With dead ends: 59
[2020-11-07 02:09:39,457 INFO  L226             Difference]: Without dead ends: 33
[2020-11-07 02:09:39,461 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-11-07 02:09:39,484 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 33 states.
[2020-11-07 02:09:39,515 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33.
[2020-11-07 02:09:39,517 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 33 states.
[2020-11-07 02:09:39,519 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions.
[2020-11-07 02:09:39,521 INFO  L78                 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 25
[2020-11-07 02:09:39,522 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-07 02:09:39,522 INFO  L481      AbstractCegarLoop]: Abstraction has 33 states and 34 transitions.
[2020-11-07 02:09:39,522 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-11-07 02:09:39,522 INFO  L276                IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions.
[2020-11-07 02:09:39,523 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-11-07 02:09:39,524 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 02:09:39,524 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-07 02:09:39,524 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0
[2020-11-07 02:09:39,525 INFO  L429      AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 02:09:39,526 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 02:09:39,526 INFO  L82        PathProgramCache]: Analyzing trace with hash -974986203, now seen corresponding path program 1 times
[2020-11-07 02:09:39,526 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 02:09:39,527 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260828124]
[2020-11-07 02:09:39,527 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 02:09:39,531 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 02:09:39,564 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:39,968 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-11-07 02:09:39,974 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:40,003 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-07 02:09:40,004 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260828124]
[2020-11-07 02:09:40,005 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-07 02:09:40,005 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-11-07 02:09:40,005 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423514313]
[2020-11-07 02:09:40,006 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-11-07 02:09:40,006 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-11-07 02:09:40,008 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-11-07 02:09:40,009 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56
[2020-11-07 02:09:40,009 INFO  L87              Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states.
[2020-11-07 02:09:40,446 WARN  L194               SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32
[2020-11-07 02:09:40,599 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-07 02:09:40,599 INFO  L93              Difference]: Finished difference Result 55 states and 59 transitions.
[2020-11-07 02:09:40,599 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-11-07 02:09:40,600 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 25
[2020-11-07 02:09:40,600 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-07 02:09:40,601 INFO  L225             Difference]: With dead ends: 55
[2020-11-07 02:09:40,601 INFO  L226             Difference]: Without dead ends: 37
[2020-11-07 02:09:40,603 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156
[2020-11-07 02:09:40,604 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2020-11-07 02:09:40,614 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35.
[2020-11-07 02:09:40,614 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 35 states.
[2020-11-07 02:09:40,615 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions.
[2020-11-07 02:09:40,616 INFO  L78                 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 25
[2020-11-07 02:09:40,616 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-07 02:09:40,616 INFO  L481      AbstractCegarLoop]: Abstraction has 35 states and 36 transitions.
[2020-11-07 02:09:40,616 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-11-07 02:09:40,617 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions.
[2020-11-07 02:09:40,617 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 34
[2020-11-07 02:09:40,618 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 02:09:40,618 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-07 02:09:40,618 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1
[2020-11-07 02:09:40,618 INFO  L429      AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 02:09:40,619 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 02:09:40,619 INFO  L82        PathProgramCache]: Analyzing trace with hash -27000676, now seen corresponding path program 1 times
[2020-11-07 02:09:40,619 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 02:09:40,620 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611551644]
[2020-11-07 02:09:40,620 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 02:09:40,743 INFO  L120            Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-11-07 02:09:40,746 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 02:09:40,768 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:40,947 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-11-07 02:09:40,950 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:40,962 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-07 02:09:40,962 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611551644]
[2020-11-07 02:09:40,963 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-07 02:09:40,963 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10
[2020-11-07 02:09:40,963 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630878147]
[2020-11-07 02:09:40,964 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-11-07 02:09:40,964 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-11-07 02:09:40,965 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-11-07 02:09:40,965 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90
[2020-11-07 02:09:40,965 INFO  L87              Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states.
[2020-11-07 02:09:41,403 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-07 02:09:41,403 INFO  L93              Difference]: Finished difference Result 49 states and 50 transitions.
[2020-11-07 02:09:41,404 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. 
[2020-11-07 02:09:41,404 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 33
[2020-11-07 02:09:41,405 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-07 02:09:41,406 INFO  L225             Difference]: With dead ends: 49
[2020-11-07 02:09:41,406 INFO  L226             Difference]: Without dead ends: 42
[2020-11-07 02:09:41,407 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342
[2020-11-07 02:09:41,407 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 42 states.
[2020-11-07 02:09:41,417 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42.
[2020-11-07 02:09:41,418 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 42 states.
[2020-11-07 02:09:41,419 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions.
[2020-11-07 02:09:41,420 INFO  L78                 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33
[2020-11-07 02:09:41,420 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-07 02:09:41,420 INFO  L481      AbstractCegarLoop]: Abstraction has 42 states and 43 transitions.
[2020-11-07 02:09:41,420 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-11-07 02:09:41,420 INFO  L276                IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions.
[2020-11-07 02:09:41,422 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2020-11-07 02:09:41,422 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 02:09:41,422 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-07 02:09:41,422 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2
[2020-11-07 02:09:41,423 INFO  L429      AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 02:09:41,423 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 02:09:41,423 INFO  L82        PathProgramCache]: Analyzing trace with hash 689235082, now seen corresponding path program 1 times
[2020-11-07 02:09:41,424 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 02:09:41,424 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851997943]
[2020-11-07 02:09:41,424 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 02:09:42,885 WARN  L194               SmtUtils]: Spent 904.00 ms on a formula simplification that was a NOOP. DAG size: 27
[2020-11-07 02:09:42,907 INFO  L120            Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-11-07 02:09:42,910 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 02:09:42,960 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:43,437 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-11-07 02:09:43,443 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:43,460 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-07 02:09:43,461 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851997943]
[2020-11-07 02:09:43,462 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-07 02:09:43,462 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15
[2020-11-07 02:09:43,463 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154146525]
[2020-11-07 02:09:43,465 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-11-07 02:09:43,465 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-11-07 02:09:43,466 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-11-07 02:09:43,467 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210
[2020-11-07 02:09:43,467 INFO  L87              Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states.
[2020-11-07 02:09:44,789 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-07 02:09:44,790 INFO  L93              Difference]: Finished difference Result 70 states and 75 transitions.
[2020-11-07 02:09:44,791 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. 
[2020-11-07 02:09:44,791 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states. Word has length 38
[2020-11-07 02:09:44,792 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-07 02:09:44,793 INFO  L225             Difference]: With dead ends: 70
[2020-11-07 02:09:44,793 INFO  L226             Difference]: Without dead ends: 52
[2020-11-07 02:09:44,795 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056
[2020-11-07 02:09:44,795 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 52 states.
[2020-11-07 02:09:44,810 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 48.
[2020-11-07 02:09:44,810 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 48 states.
[2020-11-07 02:09:44,811 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions.
[2020-11-07 02:09:44,812 INFO  L78                 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 38
[2020-11-07 02:09:44,812 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-07 02:09:44,812 INFO  L481      AbstractCegarLoop]: Abstraction has 48 states and 50 transitions.
[2020-11-07 02:09:44,812 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-11-07 02:09:44,813 INFO  L276                IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions.
[2020-11-07 02:09:44,814 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 47
[2020-11-07 02:09:44,814 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 02:09:44,815 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-07 02:09:44,815 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3
[2020-11-07 02:09:44,815 INFO  L429      AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 02:09:44,816 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 02:09:44,816 INFO  L82        PathProgramCache]: Analyzing trace with hash -1902785535, now seen corresponding path program 2 times
[2020-11-07 02:09:44,817 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 02:09:44,817 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200438228]
[2020-11-07 02:09:44,817 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 02:09:45,070 INFO  L120            Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-11-07 02:09:45,073 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 02:09:45,094 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:45,377 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-11-07 02:09:45,380 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:45,390 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-07 02:09:45,390 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200438228]
[2020-11-07 02:09:45,391 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-07 02:09:45,391 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16
[2020-11-07 02:09:45,391 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875846819]
[2020-11-07 02:09:45,392 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-11-07 02:09:45,392 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-11-07 02:09:45,392 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-11-07 02:09:45,393 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240
[2020-11-07 02:09:45,393 INFO  L87              Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 16 states.
[2020-11-07 02:09:46,877 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-07 02:09:46,877 INFO  L93              Difference]: Finished difference Result 75 states and 80 transitions.
[2020-11-07 02:09:46,878 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. 
[2020-11-07 02:09:46,878 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states. Word has length 46
[2020-11-07 02:09:46,880 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-07 02:09:46,881 INFO  L225             Difference]: With dead ends: 75
[2020-11-07 02:09:46,881 INFO  L226             Difference]: Without dead ends: 55
[2020-11-07 02:09:46,883 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190
[2020-11-07 02:09:46,883 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 55 states.
[2020-11-07 02:09:46,896 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52.
[2020-11-07 02:09:46,897 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 52 states.
[2020-11-07 02:09:46,898 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions.
[2020-11-07 02:09:46,898 INFO  L78                 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 46
[2020-11-07 02:09:46,899 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-07 02:09:46,899 INFO  L481      AbstractCegarLoop]: Abstraction has 52 states and 53 transitions.
[2020-11-07 02:09:46,899 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-11-07 02:09:46,899 INFO  L276                IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions.
[2020-11-07 02:09:46,901 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 52
[2020-11-07 02:09:46,901 INFO  L414         BasicCegarLoop]: Found error trace
[2020-11-07 02:09:46,901 INFO  L422         BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-11-07 02:09:46,902 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4
[2020-11-07 02:09:46,902 INFO  L429      AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-11-07 02:09:46,902 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-11-07 02:09:46,902 INFO  L82        PathProgramCache]: Analyzing trace with hash 597913669, now seen corresponding path program 3 times
[2020-11-07 02:09:46,903 INFO  L162   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-11-07 02:09:46,903 INFO  L353   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071185630]
[2020-11-07 02:09:46,903 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
[2020-11-07 02:09:47,278 INFO  L120            Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found.
[2020-11-07 02:09:47,280 INFO  L328   leratedInterpolation]: No loops in this trace, falling back to nested interpolation
[2020-11-07 02:09:47,303 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:47,875 INFO  L375   atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0
[2020-11-07 02:09:47,878 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-11-07 02:09:47,891 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-11-07 02:09:47,892 INFO  L353   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071185630]
[2020-11-07 02:09:47,892 INFO  L219   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-11-07 02:09:47,892 INFO  L232   FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20
[2020-11-07 02:09:47,893 INFO  L155   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300112752]
[2020-11-07 02:09:47,893 INFO  L461      AbstractCegarLoop]: Interpolant automaton has 20 states
[2020-11-07 02:09:47,894 INFO  L142   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-11-07 02:09:47,894 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants.
[2020-11-07 02:09:47,895 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380
[2020-11-07 02:09:47,895 INFO  L87              Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 20 states.
[2020-11-07 02:09:49,614 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-11-07 02:09:49,614 INFO  L93              Difference]: Finished difference Result 68 states and 72 transitions.
[2020-11-07 02:09:49,614 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. 
[2020-11-07 02:09:49,614 INFO  L78                 Accepts]: Start accepts. Automaton has 20 states. Word has length 51
[2020-11-07 02:09:49,615 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-11-07 02:09:49,615 INFO  L225             Difference]: With dead ends: 68
[2020-11-07 02:09:49,615 INFO  L226             Difference]: Without dead ends: 0
[2020-11-07 02:09:49,617 INFO  L677         BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=197, Invalid=1443, Unknown=0, NotChecked=0, Total=1640
[2020-11-07 02:09:49,617 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-11-07 02:09:49,617 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-11-07 02:09:49,618 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-11-07 02:09:49,618 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-11-07 02:09:49,618 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 51
[2020-11-07 02:09:49,618 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-11-07 02:09:49,618 INFO  L481      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-11-07 02:09:49,618 INFO  L482      AbstractCegarLoop]: Interpolant automaton has 20 states.
[2020-11-07 02:09:49,619 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-11-07 02:09:49,619 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-11-07 02:09:49,619 WARN  L518      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5
[2020-11-07 02:09:49,621 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-11-07 02:09:50,135 WARN  L194               SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25
[2020-11-07 02:09:50,249 WARN  L194               SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 24
[2020-11-07 02:09:50,774 INFO  L269        CegarLoopResult]: At program point  reach_errorEXIT(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,774 INFO  L269        CegarLoopResult]: At program point  reach_errorENTRY(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,774 INFO  L269        CegarLoopResult]: At program point  L12-1(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,775 INFO  L269        CegarLoopResult]: At program point  L12-2(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,775 INFO  L269        CegarLoopResult]: At program point  L12-3(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,775 INFO  L269        CegarLoopResult]: At program point  reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,775 INFO  L269        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-11-07 02:09:50,775 INFO  L269        CegarLoopResult]: At program point  L-1-1(line -1)  the Hoare annotation is:  true
[2020-11-07 02:09:50,776 INFO  L269        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,776 INFO  L269        CegarLoopResult]: At program point  L12(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,776 INFO  L269        CegarLoopResult]: At program point  L12-1(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,776 INFO  L269        CegarLoopResult]: At program point  L12-2(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,776 INFO  L262        CegarLoopResult]: At program point  ULTIMATE.initENTRY(line -1)  the Hoare annotation is:  (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|))
[2020-11-07 02:09:50,776 INFO  L269        CegarLoopResult]: At program point  L12-3(line 12)  the Hoare annotation is:  true
[2020-11-07 02:09:50,777 INFO  L269        CegarLoopResult]: At program point  ULTIMATE.initEXIT(line -1)  the Hoare annotation is:  true
[2020-11-07 02:09:50,777 INFO  L269        CegarLoopResult]: At program point  ULTIMATE.startEXIT(line -1)  the Hoare annotation is:  true
[2020-11-07 02:09:50,777 INFO  L269        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-11-07 02:09:50,777 INFO  L269        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-11-07 02:09:50,777 INFO  L269        CegarLoopResult]: At program point  ULTIMATE.startFINAL(line -1)  the Hoare annotation is:  true
[2020-11-07 02:09:50,777 INFO  L266        CegarLoopResult]: For program point  L15(line 15)  no Hoare annotation was computed.
[2020-11-07 02:09:50,778 INFO  L266        CegarLoopResult]: For program point  L15-1(line 15)  no Hoare annotation was computed.
[2020-11-07 02:09:50,778 INFO  L266        CegarLoopResult]: For program point  assume_abort_if_notENTRY(lines 14 16)  no Hoare annotation was computed.
[2020-11-07 02:09:50,778 INFO  L266        CegarLoopResult]: For program point  L15-3(lines 14 16)  no Hoare annotation was computed.
[2020-11-07 02:09:50,778 INFO  L266        CegarLoopResult]: For program point  assume_abort_if_notEXIT(lines 14 16)  no Hoare annotation was computed.
[2020-11-07 02:09:50,778 INFO  L262        CegarLoopResult]: At program point  L31(line 31)  the Hoare annotation is:  (let ((.cse0 (* 2 main_~n~0))) (and (<= .cse0 main_~i~0) (<= main_~i~0 .cse0) (<= (+ main_~i~0 1) (* 2 main_~k~0))))
[2020-11-07 02:09:50,778 INFO  L262        CegarLoopResult]: At program point  L31-1(line 31)  the Hoare annotation is:  (let ((.cse1 (* 2 main_~n~0)) (.cse0 (* 2 |main_#t~post5|))) (and (<= main_~i~0 .cse0) (<= .cse1 main_~i~0) (<= main_~i~0 .cse1) (<= .cse0 main_~i~0) (<= (+ main_~i~0 1) (* 2 main_~k~0))))
[2020-11-07 02:09:50,779 INFO  L262        CegarLoopResult]: At program point  L29(line 29)  the Hoare annotation is:  (= main_~n~0 0)
[2020-11-07 02:09:50,788 INFO  L262        CegarLoopResult]: At program point  L31-2(line 31)  the Hoare annotation is:  (let ((.cse0 (* 2 |main_#t~post5|)) (.cse2 (* 2 main_~n~0)) (.cse1 (+ main_~i~0 2))) (and (<= main_~i~0 .cse0) (<= .cse1 .cse2) (<= .cse0 main_~i~0) (<= .cse2 .cse1) (<= (+ main_~i~0 1) (* 2 main_~k~0))))
[2020-11-07 02:09:50,788 INFO  L262        CegarLoopResult]: At program point  L27(line 27)  the Hoare annotation is:  (= main_~n~0 0)
[2020-11-07 02:09:50,789 INFO  L262        CegarLoopResult]: At program point  L27-1(line 27)  the Hoare annotation is:  (= main_~n~0 0)
[2020-11-07 02:09:50,789 INFO  L262        CegarLoopResult]: At program point  L29-3(lines 29 33)  the Hoare annotation is:  (let ((.cse3 (+ main_~i~0 1))) (let ((.cse1 (* 2 main_~n~0)) (.cse2 (<= .cse3 (* 2 main_~k~0)))) (or (let ((.cse0 (+ main_~i~0 2))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) .cse2)) (and (<= .cse1 .cse3) (<= .cse3 .cse1) .cse2))))
[2020-11-07 02:09:50,789 INFO  L262        CegarLoopResult]: At program point  L27-2(line 27)  the Hoare annotation is:  (= main_~n~0 0)
[2020-11-07 02:09:50,789 INFO  L262        CegarLoopResult]: At program point  L29-4(line 29)  the Hoare annotation is:  (let ((.cse1 (+ main_~i~0 1))) (let ((.cse0 (* 2 main_~n~0)) (.cse3 (<= .cse1 (* 2 main_~k~0)))) (or (let ((.cse2 (+ |main_#t~post4| 1))) (and (<= .cse0 .cse1) (<= .cse2 .cse0) (<= .cse0 .cse2) (<= .cse1 .cse0) .cse3)) (let ((.cse4 (+ |main_#t~post4| 2)) (.cse5 (+ main_~i~0 2))) (and (<= .cse4 .cse0) (<= .cse0 .cse4) (<= .cse5 .cse0) (<= .cse0 .cse5) .cse3)))))
[2020-11-07 02:09:50,790 INFO  L269        CegarLoopResult]: At program point  mainEXIT(lines 24 36)  the Hoare annotation is:  true
[2020-11-07 02:09:50,790 INFO  L262        CegarLoopResult]: At program point  L29-5(line 29)  the Hoare annotation is:  (let ((.cse1 (* 2 main_~n~0))) (or (let ((.cse0 (+ |main_#t~post4| 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 main_~i~0) (<= main_~i~0 .cse1) (< main_~n~0 (+ main_~k~0 1)))) (let ((.cse3 (+ |main_#t~post4| 2)) (.cse2 (+ main_~i~0 1))) (and (<= .cse1 .cse2) (<= .cse2 .cse1) (<= .cse3 .cse1) (<= .cse1 .cse3) (<= .cse2 (* 2 main_~k~0))))))
[2020-11-07 02:09:50,790 INFO  L262        CegarLoopResult]: At program point  L29-6(lines 29 33)  the Hoare annotation is:  (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 2 main_~k~0)))) (and (= main_~i~0 0) (= main_~n~0 0)) (and (<= .cse0 main_~i~0) (<= main_~i~0 .cse0) (< main_~n~0 (+ main_~k~0 1)))))
[2020-11-07 02:09:50,790 INFO  L262        CegarLoopResult]: At program point  L29-7(lines 29 33)  the Hoare annotation is:  (or (and (<= main_~k~0 main_~n~0) (< main_~n~0 (+ main_~k~0 1))) (and (= main_~i~0 0) (= main_~n~0 0) (<= main_~k~0 0)))
[2020-11-07 02:09:50,790 INFO  L269        CegarLoopResult]: At program point  mainFINAL(lines 24 36)  the Hoare annotation is:  true
[2020-11-07 02:09:50,790 INFO  L269        CegarLoopResult]: At program point  L34(line 34)  the Hoare annotation is:  true
[2020-11-07 02:09:50,791 INFO  L262        CegarLoopResult]: At program point  L30(lines 30 32)  the Hoare annotation is:  (let ((.cse2 (+ main_~i~0 1))) (let ((.cse0 (* 2 main_~n~0)) (.cse1 (<= .cse2 (* 2 main_~k~0)))) (or (and (<= .cse0 main_~i~0) (<= main_~i~0 .cse0) .cse1) (and (<= .cse0 .cse2) (<= .cse2 .cse0) .cse1))))
[2020-11-07 02:09:50,791 INFO  L269        CegarLoopResult]: At program point  mainENTRY(lines 24 36)  the Hoare annotation is:  true
[2020-11-07 02:09:50,791 INFO  L262        CegarLoopResult]: At program point  L28(line 28)  the Hoare annotation is:  (= main_~n~0 0)
[2020-11-07 02:09:50,791 INFO  L269        CegarLoopResult]: At program point  L28-1(line 28)  the Hoare annotation is:  true
[2020-11-07 02:09:50,791 INFO  L269        CegarLoopResult]: At program point  L26(line 26)  the Hoare annotation is:  true
[2020-11-07 02:09:50,791 INFO  L269        CegarLoopResult]: At program point  L18-2(lines 17 22)  the Hoare annotation is:  true
[2020-11-07 02:09:50,792 INFO  L269        CegarLoopResult]: At program point  __VERIFIER_assertENTRY(lines 17 22)  the Hoare annotation is:  true
[2020-11-07 02:09:50,792 INFO  L269        CegarLoopResult]: At program point  __VERIFIER_assertEXIT(lines 17 22)  the Hoare annotation is:  true
[2020-11-07 02:09:50,792 INFO  L262        CegarLoopResult]: At program point  L19(line 19)  the Hoare annotation is:  (= |__VERIFIER_assert_#in~cond| 0)
[2020-11-07 02:09:50,792 INFO  L262        CegarLoopResult]: At program point  L18(lines 18 20)  the Hoare annotation is:  (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))
[2020-11-07 02:09:50,792 INFO  L262        CegarLoopResult]: At program point  L19-1(line 19)  the Hoare annotation is:  (= |__VERIFIER_assert_#in~cond| 0)
[2020-11-07 02:09:50,813 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:09:50 BoogieIcfgContainer
[2020-11-07 02:09:50,813 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-11-07 02:09:50,815 INFO  L168              Benchmark]: Toolchain (without parser) took 12874.81 ms. Allocated memory was 125.8 MB in the beginning and 199.2 MB in the end (delta: 73.4 MB). Free memory was 102.8 MB in the beginning and 180.6 MB in the end (delta: -77.8 MB). Peak memory consumption was 111.6 MB. Max. memory is 8.0 GB.
[2020-11-07 02:09:50,816 INFO  L168              Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory is still 87.6 MB. There was no memory consumed. Max. memory is 8.0 GB.
[2020-11-07 02:09:50,817 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 299.63 ms. Allocated memory is still 125.8 MB. Free memory was 102.2 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
[2020-11-07 02:09:50,817 INFO  L168              Benchmark]: Boogie Preprocessor took 37.91 ms. Allocated memory is still 125.8 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
[2020-11-07 02:09:50,818 INFO  L168              Benchmark]: RCFGBuilder took 514.31 ms. Allocated memory is still 125.8 MB. Free memory was 91.2 MB in the beginning and 75.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB.
[2020-11-07 02:09:50,819 INFO  L168              Benchmark]: TraceAbstraction took 12004.58 ms. Allocated memory was 125.8 MB in the beginning and 199.2 MB in the end (delta: 73.4 MB). Free memory was 75.1 MB in the beginning and 180.6 MB in the end (delta: -105.5 MB). Peak memory consumption was 84.3 MB. Max. memory is 8.0 GB.
[2020-11-07 02:09:50,823 INFO  L339   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory is still 87.6 MB. There was no memory consumed. Max. memory is 8.0 GB.
 * CACSL2BoogieTranslator took 299.63 ms. Allocated memory is still 125.8 MB. Free memory was 102.2 MB in the beginning and 92.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB.
 * Boogie Preprocessor took 37.91 ms. Allocated memory is still 125.8 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB.
 * RCFGBuilder took 514.31 ms. Allocated memory is still 125.8 MB. Free memory was 91.2 MB in the beginning and 75.5 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB.
 * TraceAbstraction took 12004.58 ms. Allocated memory was 125.8 MB in the beginning and 199.2 MB in the end (delta: 73.4 MB). Free memory was 75.1 MB in the beginning and 180.6 MB in the end (delta: -105.5 MB). Peak memory consumption was 84.3 MB. Max. memory is 8.0 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 12]: 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: 29]: Loop Invariant
    Derived loop invariant: (((2 * n <= i + 1 && i + 1 <= 2 * n) && i + 1 <= 2 * k) || (i == 0 && n == 0)) || ((2 * n <= i && i <= 2 * n) && n < k + 1)
  - ProcedureContractResult [Line: 12]: Procedure Contract for reach_error
    Derived contract for procedure reach_error: 1
  - ProcedureContractResult [Line: 24]: Procedure Contract for main
    Derived contract for procedure main: 1
  - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert
    Derived contract for procedure __VERIFIER_assert: 1
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 6 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.6s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 5.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 174 SDtfs, 271 SDslu, 625 SDs, 0 SdLazy, 1126 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 151 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 45 LocationsWithAnnotation, 123 PreInvPairs, 173 NumberOfFragments, 451 HoareAnnotationTreeSize, 123 FomulaSimplifications, 1660 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 45 FomulaSimplificationsInter, 1299 FormulaSimplificationTreeSizeReductionInter, 0.8s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 correct!
Received shutdown request...