/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/gcd01-1.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 10:48:02,835 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 10:48:02,838 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 10:48:02,851 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 10:48:02,851 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 10:48:02,852 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 10:48:02,853 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 10:48:02,855 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 10:48:02,857 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 10:48:02,858 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 10:48:02,859 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 10:48:02,860 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 10:48:02,860 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 10:48:02,861 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 10:48:02,862 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 10:48:02,864 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 10:48:02,864 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 10:48:02,865 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 10:48:02,867 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 10:48:02,869 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 10:48:02,871 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 10:48:02,872 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 10:48:02,873 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 10:48:02,874 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 10:48:02,879 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 10:48:02,879 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 10:48:02,879 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 10:48:02,884 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 10:48:02,884 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 10:48:02,885 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 10:48:02,887 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 10:48:02,888 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 10:48:02,890 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 10:48:02,891 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 10:48:02,892 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 10:48:02,892 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 10:48:02,897 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 10:48:02,897 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 10:48:02,898 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 10:48:02,898 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 10:48:02,899 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 10:48:02,901 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
[2020-07-20 10:48:02,928 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 10:48:02,928 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 10:48:02,930 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 10:48:02,931 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 10:48:02,931 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 10:48:02,931 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 10:48:02,931 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 10:48:02,932 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 10:48:02,932 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 10:48:02,932 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 10:48:02,933 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 10:48:02,933 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 10:48:02,934 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 10:48:02,934 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 10:48:02,934 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 10:48:02,934 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 10:48:02,934 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 10:48:02,935 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 10:48:02,935 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 10:48:02,935 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 10:48:02,936 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 10:48:02,936 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 10:48:02,936 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 10:48:02,936 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 10:48:02,936 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 10:48:02,937 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 10:48:02,937 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:02,937 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 10:48:02,937 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 10:48:02,937 INFO  L138        SettingsManager]:  * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY
[2020-07-20 10:48:03,250 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 10:48:03,264 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 10:48:03,267 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 10:48:03,269 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 10:48:03,270 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 10:48:03,270 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/gcd01-1.c
[2020-07-20 10:48:03,348 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e00e9b0e/498d44353e13495e81d3aa7c96e6ba0f/FLAG62fc1863f
[2020-07-20 10:48:03,805 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 10:48:03,806 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/gcd01-1.c
[2020-07-20 10:48:03,813 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e00e9b0e/498d44353e13495e81d3aa7c96e6ba0f/FLAG62fc1863f
[2020-07-20 10:48:04,193 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e00e9b0e/498d44353e13495e81d3aa7c96e6ba0f
[2020-07-20 10:48:04,202 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 10:48:04,204 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 10:48:04,205 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 10:48:04,205 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 10:48:04,209 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 10:48:04,210 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:04" (1/1) ...
[2020-07-20 10:48:04,213 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c612bd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04, skipping insertion in model container
[2020-07-20 10:48:04,213 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:48:04" (1/1) ...
[2020-07-20 10:48:04,221 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 10:48:04,238 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 10:48:04,411 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 10:48:04,416 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 10:48:04,432 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 10:48:04,445 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 10:48:04,445 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04 WrapperNode
[2020-07-20 10:48:04,445 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 10:48:04,446 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 10:48:04,446 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 10:48:04,446 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 10:48:04,459 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ...
[2020-07-20 10:48:04,459 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ...
[2020-07-20 10:48:04,465 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ...
[2020-07-20 10:48:04,465 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ...
[2020-07-20 10:48:04,469 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ...
[2020-07-20 10:48:04,471 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ...
[2020-07-20 10:48:04,472 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (1/1) ...
[2020-07-20 10:48:04,474 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 10:48:04,474 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 10:48:04,474 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 10:48:04,475 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 10:48:04,476 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (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
[2020-07-20 10:48:04,631 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 10:48:04,632 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 10:48:04,632 INFO  L138     BoogieDeclarations]: Found implementation of procedure gcd
[2020-07-20 10:48:04,632 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 10:48:04,632 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 10:48:04,632 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 10:48:04,632 INFO  L130     BoogieDeclarations]: Found specification of procedure gcd
[2020-07-20 10:48:04,632 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 10:48:04,633 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 10:48:04,633 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 10:48:04,839 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 10:48:04,840 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 10:48:04,846 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:04 BoogieIcfgContainer
[2020-07-20 10:48:04,847 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 10:48:04,848 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 10:48:04,848 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 10:48:04,851 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 10:48:04,851 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:48:04" (1/3) ...
[2020-07-20 10:48:04,855 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edc8ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:04, skipping insertion in model container
[2020-07-20 10:48:04,855 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:48:04" (2/3) ...
[2020-07-20 10:48:04,855 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edc8ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:48:04, skipping insertion in model container
[2020-07-20 10:48:04,856 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:48:04" (3/3) ...
[2020-07-20 10:48:04,857 INFO  L109   eAbstractionObserver]: Analyzing ICFG gcd01-1.c
[2020-07-20 10:48:04,868 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 10:48:04,875 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 10:48:04,890 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 10:48:04,915 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 10:48:04,915 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 10:48:04,916 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 10:48:04,916 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 10:48:04,916 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 10:48:04,916 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 10:48:04,916 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 10:48:04,916 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 10:48:04,936 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states.
[2020-07-20 10:48:04,943 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-20 10:48:04,943 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 10:48:04,945 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 10:48:04,945 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:48:04,950 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:48:04,950 INFO  L82        PathProgramCache]: Analyzing trace with hash -1001932622, now seen corresponding path program 1 times
[2020-07-20 10:48:04,957 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:48:04,958 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148328175]
[2020-07-20 10:48:04,958 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:05,012 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 10:48:05,014 INFO  L263         TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 10:48:05,021 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 10:48:05,160 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:05,165 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:05,186 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:05,188 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:05,193 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:05,207 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 10:48:05,208 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 10:48:05,209 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148328175]
[2020-07-20 10:48:05,210 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 10:48:05,210 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-20 10:48:05,211 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41794861]
[2020-07-20 10:48:05,217 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 10:48:05,217 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 10:48:05,229 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 10:48:05,230 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-07-20 10:48:05,232 INFO  L87              Difference]: Start difference. First operand 26 states. Second operand 6 states.
[2020-07-20 10:48:05,382 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 10:48:05,383 INFO  L93              Difference]: Finished difference Result 40 states and 49 transitions.
[2020-07-20 10:48:05,384 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-07-20 10:48:05,385 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 15
[2020-07-20 10:48:05,386 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 10:48:05,396 INFO  L225             Difference]: With dead ends: 40
[2020-07-20 10:48:05,397 INFO  L226             Difference]: Without dead ends: 24
[2020-07-20 10:48:05,401 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-07-20 10:48:05,420 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-07-20 10:48:05,445 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2020-07-20 10:48:05,447 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-07-20 10:48:05,448 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions.
[2020-07-20 10:48:05,450 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15
[2020-07-20 10:48:05,451 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 10:48:05,451 INFO  L479      AbstractCegarLoop]: Abstraction has 24 states and 29 transitions.
[2020-07-20 10:48:05,451 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 10:48:05,452 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions.
[2020-07-20 10:48:05,453 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-07-20 10:48:05,454 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 10:48:05,454 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 10:48:05,662 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:05,663 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:48:05,663 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:48:05,663 INFO  L82        PathProgramCache]: Analyzing trace with hash -423841111, now seen corresponding path program 1 times
[2020-07-20 10:48:05,664 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:48:05,665 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727881419]
[2020-07-20 10:48:05,665 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:05,691 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 10:48:05,692 INFO  L263         TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-20 10:48:05,694 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 10:48:05,754 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 10:48:05,754 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 10:48:05,755 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727881419]
[2020-07-20 10:48:05,755 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 10:48:05,755 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-20 10:48:05,756 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898539064]
[2020-07-20 10:48:05,758 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 10:48:05,758 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 10:48:05,758 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 10:48:05,759 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-07-20 10:48:05,759 INFO  L87              Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states.
[2020-07-20 10:48:05,807 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 10:48:05,807 INFO  L93              Difference]: Finished difference Result 30 states and 36 transitions.
[2020-07-20 10:48:05,808 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-07-20 10:48:05,808 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 16
[2020-07-20 10:48:05,808 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 10:48:05,809 INFO  L225             Difference]: With dead ends: 30
[2020-07-20 10:48:05,810 INFO  L226             Difference]: Without dead ends: 26
[2020-07-20 10:48:05,811 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-07-20 10:48:05,811 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2020-07-20 10:48:05,817 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24.
[2020-07-20 10:48:05,818 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-07-20 10:48:05,819 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions.
[2020-07-20 10:48:05,819 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16
[2020-07-20 10:48:05,819 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 10:48:05,820 INFO  L479      AbstractCegarLoop]: Abstraction has 24 states and 29 transitions.
[2020-07-20 10:48:05,820 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 10:48:05,820 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions.
[2020-07-20 10:48:05,821 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 10:48:05,821 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 10:48:05,822 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 10:48:06,034 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:06,035 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:48:06,035 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:48:06,035 INFO  L82        PathProgramCache]: Analyzing trace with hash -1280495258, now seen corresponding path program 1 times
[2020-07-20 10:48:06,036 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:48:06,036 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797025100]
[2020-07-20 10:48:06,036 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:06,067 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 10:48:06,068 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 10:48:06,070 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 10:48:06,105 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:06,107 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:06,123 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:06,125 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:06,129 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:06,135 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 10:48:06,135 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 10:48:06,136 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1797025100]
[2020-07-20 10:48:06,136 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 10:48:06,136 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-20 10:48:06,137 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100693334]
[2020-07-20 10:48:06,137 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 10:48:06,137 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 10:48:06,138 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 10:48:06,138 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-07-20 10:48:06,138 INFO  L87              Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states.
[2020-07-20 10:48:06,259 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 10:48:06,259 INFO  L93              Difference]: Finished difference Result 36 states and 45 transitions.
[2020-07-20 10:48:06,270 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-07-20 10:48:06,271 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 23
[2020-07-20 10:48:06,271 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 10:48:06,272 INFO  L225             Difference]: With dead ends: 36
[2020-07-20 10:48:06,272 INFO  L226             Difference]: Without dead ends: 28
[2020-07-20 10:48:06,273 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72
[2020-07-20 10:48:06,273 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-07-20 10:48:06,280 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26.
[2020-07-20 10:48:06,281 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 26 states.
[2020-07-20 10:48:06,282 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions.
[2020-07-20 10:48:06,282 INFO  L78                 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 23
[2020-07-20 10:48:06,282 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 10:48:06,283 INFO  L479      AbstractCegarLoop]: Abstraction has 26 states and 31 transitions.
[2020-07-20 10:48:06,283 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 10:48:06,283 INFO  L276                IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions.
[2020-07-20 10:48:06,284 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-20 10:48:06,284 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 10:48:06,284 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 10:48:06,498 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:06,498 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:48:06,499 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:48:06,499 INFO  L82        PathProgramCache]: Analyzing trace with hash 1668712292, now seen corresponding path program 1 times
[2020-07-20 10:48:06,500 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:48:06,500 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810649207]
[2020-07-20 10:48:06,501 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:06,530 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 10:48:06,531 INFO  L263         TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 10:48:06,533 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 10:48:06,593 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:06,594 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:06,609 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:06,611 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 10:48:06,615 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts
[2020-07-20 10:48:06,620 INFO  L134       CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 10:48:06,621 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 10:48:06,621 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810649207]
[2020-07-20 10:48:06,621 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 10:48:06,622 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-07-20 10:48:06,622 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144009030]
[2020-07-20 10:48:06,622 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 10:48:06,623 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 10:48:06,623 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 10:48:06,623 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42
[2020-07-20 10:48:06,623 INFO  L87              Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 7 states.
[2020-07-20 10:48:06,730 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 10:48:06,730 INFO  L93              Difference]: Finished difference Result 36 states and 44 transitions.
[2020-07-20 10:48:06,731 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 10:48:06,731 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 23
[2020-07-20 10:48:06,731 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 10:48:06,732 INFO  L225             Difference]: With dead ends: 36
[2020-07-20 10:48:06,732 INFO  L226             Difference]: Without dead ends: 26
[2020-07-20 10:48:06,733 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110
[2020-07-20 10:48:06,733 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 26 states.
[2020-07-20 10:48:06,738 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24.
[2020-07-20 10:48:06,738 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-07-20 10:48:06,739 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions.
[2020-07-20 10:48:06,739 INFO  L78                 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 23
[2020-07-20 10:48:06,740 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 10:48:06,740 INFO  L479      AbstractCegarLoop]: Abstraction has 24 states and 28 transitions.
[2020-07-20 10:48:06,740 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 10:48:06,740 INFO  L276                IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions.
[2020-07-20 10:48:06,742 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 10:48:06,742 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 10:48:06,743 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 10:48:06,943 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:06,944 INFO  L427      AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:48:06,945 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:48:06,945 INFO  L82        PathProgramCache]: Analyzing trace with hash -1139697511, now seen corresponding path program 1 times
[2020-07-20 10:48:06,946 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:48:06,946 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272336593]
[2020-07-20 10:48:06,947 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:06,972 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 10:48:06,973 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 10:48:06,975 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 10:48:07,034 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-07-20 10:48:07,034 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 10:48:07,035 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272336593]
[2020-07-20 10:48:07,035 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 10:48:07,035 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-07-20 10:48:07,036 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323069161]
[2020-07-20 10:48:07,038 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 10:48:07,038 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 10:48:07,038 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 10:48:07,039 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-07-20 10:48:07,039 INFO  L87              Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 7 states.
[2020-07-20 10:48:07,103 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 10:48:07,103 INFO  L93              Difference]: Finished difference Result 31 states and 36 transitions.
[2020-07-20 10:48:07,104 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 10:48:07,104 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 24
[2020-07-20 10:48:07,104 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 10:48:07,105 INFO  L225             Difference]: With dead ends: 31
[2020-07-20 10:48:07,105 INFO  L226             Difference]: Without dead ends: 27
[2020-07-20 10:48:07,106 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-07-20 10:48:07,107 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 27 states.
[2020-07-20 10:48:07,111 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25.
[2020-07-20 10:48:07,111 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2020-07-20 10:48:07,112 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions.
[2020-07-20 10:48:07,112 INFO  L78                 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 24
[2020-07-20 10:48:07,113 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 10:48:07,113 INFO  L479      AbstractCegarLoop]: Abstraction has 25 states and 29 transitions.
[2020-07-20 10:48:07,113 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 10:48:07,113 INFO  L276                IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions.
[2020-07-20 10:48:07,114 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 25
[2020-07-20 10:48:07,114 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 10:48:07,115 INFO  L422         BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 10:48:07,328 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:07,329 INFO  L427      AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:48:07,329 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:48:07,329 INFO  L82        PathProgramCache]: Analyzing trace with hash 99153721, now seen corresponding path program 1 times
[2020-07-20 10:48:07,330 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:48:07,330 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545405783]
[2020-07-20 10:48:07,331 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:07,360 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 10:48:07,361 INFO  L263         TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 10:48:07,363 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 10:48:07,412 INFO  L134       CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-07-20 10:48:07,413 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 10:48:07,413 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [545405783]
[2020-07-20 10:48:07,413 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 10:48:07,414 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7
[2020-07-20 10:48:07,414 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066955997]
[2020-07-20 10:48:07,414 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 7 states
[2020-07-20 10:48:07,415 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 10:48:07,415 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants.
[2020-07-20 10:48:07,415 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42
[2020-07-20 10:48:07,415 INFO  L87              Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 7 states.
[2020-07-20 10:48:07,479 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 10:48:07,479 INFO  L93              Difference]: Finished difference Result 34 states and 40 transitions.
[2020-07-20 10:48:07,480 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-20 10:48:07,480 INFO  L78                 Accepts]: Start accepts. Automaton has 7 states. Word has length 24
[2020-07-20 10:48:07,480 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 10:48:07,481 INFO  L225             Difference]: With dead ends: 34
[2020-07-20 10:48:07,481 INFO  L226             Difference]: Without dead ends: 30
[2020-07-20 10:48:07,483 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72
[2020-07-20 10:48:07,484 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-07-20 10:48:07,492 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30.
[2020-07-20 10:48:07,492 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 30 states.
[2020-07-20 10:48:07,495 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions.
[2020-07-20 10:48:07,496 INFO  L78                 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 24
[2020-07-20 10:48:07,496 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 10:48:07,497 INFO  L479      AbstractCegarLoop]: Abstraction has 30 states and 36 transitions.
[2020-07-20 10:48:07,497 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 7 states.
[2020-07-20 10:48:07,497 INFO  L276                IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions.
[2020-07-20 10:48:07,500 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2020-07-20 10:48:07,500 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 10:48:07,501 INFO  L422         BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 10:48:07,701 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:07,702 INFO  L427      AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 10:48:07,702 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 10:48:07,703 INFO  L82        PathProgramCache]: Analyzing trace with hash 10057033, now seen corresponding path program 1 times
[2020-07-20 10:48:07,703 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 10:48:07,704 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906671876]
[2020-07-20 10:48:07,704 INFO  L95    rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:07,732 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is unsat
[2020-07-20 10:48:07,733 INFO  L263         TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core
[2020-07-20 10:48:07,735 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 10:48:07,795 INFO  L134       CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked.
[2020-07-20 10:48:07,796 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 10:48:07,796 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906671876]
[2020-07-20 10:48:07,796 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 10:48:07,796 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8
[2020-07-20 10:48:07,797 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805538]
[2020-07-20 10:48:07,797 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-07-20 10:48:07,798 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 10:48:07,798 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-07-20 10:48:07,798 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56
[2020-07-20 10:48:07,799 INFO  L87              Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 8 states.
[2020-07-20 10:48:07,875 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 10:48:07,876 INFO  L93              Difference]: Finished difference Result 30 states and 36 transitions.
[2020-07-20 10:48:07,876 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 10:48:07,876 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 32
[2020-07-20 10:48:07,877 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 10:48:07,877 INFO  L225             Difference]: With dead ends: 30
[2020-07-20 10:48:07,877 INFO  L226             Difference]: Without dead ends: 0
[2020-07-20 10:48:07,880 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110
[2020-07-20 10:48:07,880 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 10:48:07,880 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 10:48:07,881 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 10:48:07,881 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 10:48:07,881 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 32
[2020-07-20 10:48:07,882 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 10:48:07,882 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 10:48:07,882 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-07-20 10:48:07,883 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 10:48:07,883 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 10:48:08,090 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 10:48:08,093 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 10:48:08,236 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-07-20 10:48:08,236 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 10:48:08,237 INFO  L268        CegarLoopResult]: For program point  gcdFINAL(lines 15 26)  no Hoare annotation was computed.
[2020-07-20 10:48:08,237 INFO  L268        CegarLoopResult]: For program point  gcdEXIT(lines 15 26)  no Hoare annotation was computed.
[2020-07-20 10:48:08,237 INFO  L264        CegarLoopResult]: At program point  L25(line 25)  the Hoare annotation is:  (and (<= |gcd_#in~y2| gcd_~y2) (not (= gcd_~y1 gcd_~y2)) (< 0 gcd_~y1) (<= gcd_~y1 gcd_~y2) (<= |gcd_#in~y1| gcd_~y1))
[2020-07-20 10:48:08,237 INFO  L268        CegarLoopResult]: For program point  L25-1(line 25)  no Hoare annotation was computed.
[2020-07-20 10:48:08,237 INFO  L271        CegarLoopResult]: At program point  gcdENTRY(lines 15 26)  the Hoare annotation is:  true
[2020-07-20 10:48:08,238 INFO  L264        CegarLoopResult]: At program point  L23(line 23)  the Hoare annotation is:  (and (<= |gcd_#in~y2| gcd_~y2) (< gcd_~y2 gcd_~y1) (< 0 gcd_~y2) (<= |gcd_#in~y1| gcd_~y1))
[2020-07-20 10:48:08,238 INFO  L268        CegarLoopResult]: For program point  L22(lines 22 24)  no Hoare annotation was computed.
[2020-07-20 10:48:08,238 INFO  L268        CegarLoopResult]: For program point  L23-1(line 23)  no Hoare annotation was computed.
[2020-07-20 10:48:08,238 INFO  L268        CegarLoopResult]: For program point  L19(lines 19 21)  no Hoare annotation was computed.
[2020-07-20 10:48:08,238 INFO  L268        CegarLoopResult]: For program point  L16(lines 16 18)  no Hoare annotation was computed.
[2020-07-20 10:48:08,238 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 10:48:08,239 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-07-20 10:48:08,239 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-07-20 10:48:08,239 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-07-20 10:48:08,239 INFO  L268        CegarLoopResult]: For program point  mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39)  no Hoare annotation was computed.
[2020-07-20 10:48:08,239 INFO  L268        CegarLoopResult]: For program point  L30(lines 30 32)  no Hoare annotation was computed.
[2020-07-20 10:48:08,240 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 28 43)  the Hoare annotation is:  true
[2020-07-20 10:48:08,240 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 28 43)  no Hoare annotation was computed.
[2020-07-20 10:48:08,240 INFO  L268        CegarLoopResult]: For program point  L39(line 39)  no Hoare annotation was computed.
[2020-07-20 10:48:08,240 INFO  L268        CegarLoopResult]: For program point  L38(lines 38 42)  no Hoare annotation was computed.
[2020-07-20 10:48:08,240 INFO  L264        CegarLoopResult]: At program point  L37(line 37)  the Hoare annotation is:  (and (< 0 main_~n~0) (< 0 main_~m~0))
[2020-07-20 10:48:08,241 INFO  L268        CegarLoopResult]: For program point  L38-1(lines 28 43)  no Hoare annotation was computed.
[2020-07-20 10:48:08,241 INFO  L268        CegarLoopResult]: For program point  L37-1(line 37)  no Hoare annotation was computed.
[2020-07-20 10:48:08,241 INFO  L268        CegarLoopResult]: For program point  L34(lines 34 36)  no Hoare annotation was computed.
[2020-07-20 10:48:08,247 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 10:48:08 BoogieIcfgContainer
[2020-07-20 10:48:08,247 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 10:48:08,250 INFO  L168              Benchmark]: Toolchain (without parser) took 4046.07 ms. Allocated memory was 145.2 MB in the beginning and 233.3 MB in the end (delta: 88.1 MB). Free memory was 103.1 MB in the beginning and 98.5 MB in the end (delta: 4.6 MB). Peak memory consumption was 92.7 MB. Max. memory is 7.1 GB.
[2020-07-20 10:48:08,251 INFO  L168              Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
[2020-07-20 10:48:08,252 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 240.55 ms. Allocated memory is still 145.2 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
[2020-07-20 10:48:08,253 INFO  L168              Benchmark]: Boogie Preprocessor took 28.01 ms. Allocated memory is still 145.2 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-07-20 10:48:08,254 INFO  L168              Benchmark]: RCFGBuilder took 372.35 ms. Allocated memory was 145.2 MB in the beginning and 200.3 MB in the end (delta: 55.1 MB). Free memory was 91.9 MB in the beginning and 166.1 MB in the end (delta: -74.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
[2020-07-20 10:48:08,255 INFO  L168              Benchmark]: TraceAbstraction took 3399.72 ms. Allocated memory was 200.3 MB in the beginning and 233.3 MB in the end (delta: 33.0 MB). Free memory was 165.5 MB in the beginning and 98.5 MB in the end (delta: 67.0 MB). Peak memory consumption was 100.0 MB. Max. memory is 7.1 GB.
[2020-07-20 10:48:08,259 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.18 ms. Allocated memory is still 145.2 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 240.55 ms. Allocated memory is still 145.2 MB. Free memory was 102.7 MB in the beginning and 93.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 28.01 ms. Allocated memory is still 145.2 MB. Free memory was 93.3 MB in the beginning and 91.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 372.35 ms. Allocated memory was 145.2 MB in the beginning and 200.3 MB in the end (delta: 55.1 MB). Free memory was 91.9 MB in the beginning and 166.1 MB in the end (delta: -74.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 3399.72 ms. Allocated memory was 200.3 MB in the beginning and 233.3 MB in the end (delta: 33.0 MB). Free memory was 165.5 MB in the beginning and 98.5 MB in the end (delta: 67.0 MB). Peak memory consumption was 100.0 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 39]: 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
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.1s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 141 SDtfs, 93 SDslu, 486 SDs, 0 SdLazy, 270 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 166 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=6, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 14 NumberOfFragments, 42 HoareAnnotationTreeSize, 14 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 157 NumberOfCodeBlocks, 157 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 6770 SizeOfPredicates, 20 NumberOfNonLiveVariables, 460 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...