/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 SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test_union_cast.i


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


This is Ultimate 0.1.25-d623d84
[2020-07-21 01:14:06,041 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-21 01:14:06,043 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-21 01:14:06,055 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-21 01:14:06,056 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-21 01:14:06,057 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-21 01:14:06,058 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-21 01:14:06,060 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-21 01:14:06,061 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-21 01:14:06,062 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-21 01:14:06,063 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-21 01:14:06,064 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-21 01:14:06,065 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-21 01:14:06,066 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-21 01:14:06,067 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-21 01:14:06,068 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-21 01:14:06,069 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-21 01:14:06,070 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-21 01:14:06,071 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-21 01:14:06,073 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-21 01:14:06,075 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-21 01:14:06,076 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-21 01:14:06,077 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-21 01:14:06,077 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-21 01:14:06,080 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-21 01:14:06,080 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-21 01:14:06,081 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-21 01:14:06,081 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-21 01:14:06,082 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-21 01:14:06,083 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-21 01:14:06,083 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-21 01:14:06,084 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-21 01:14:06,084 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-21 01:14:06,085 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-21 01:14:06,086 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-21 01:14:06,086 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-21 01:14:06,087 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-21 01:14:06,087 INFO  L184        SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-21 01:14:06,087 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-21 01:14:06,088 INFO  L181        SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-21 01:14:06,089 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-21 01:14:06,090 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
[2020-07-21 01:14:06,104 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-21 01:14:06,107 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-21 01:14:06,108 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-21 01:14:06,109 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-21 01:14:06,109 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-21 01:14:06,109 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-21 01:14:06,109 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-21 01:14:06,109 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-21 01:14:06,110 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-21 01:14:06,110 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-21 01:14:06,110 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-21 01:14:06,110 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-21 01:14:06,112 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-21 01:14:06,112 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-21 01:14:06,113 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-21 01:14:06,113 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-21 01:14:06,113 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-21 01:14:06,113 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-21 01:14:06,114 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-21 01:14:06,114 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-21 01:14:06,114 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-21 01:14:06,114 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 01:14:06,114 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-21 01:14:06,114 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-21 01:14:06,115 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-21 01:14:06,115 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-21 01:14:06,115 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:06,115 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-21 01:14:06,115 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-21 01:14:06,116 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 -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-21 01:14:06,394 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-21 01:14:06,407 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-21 01:14:06,411 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-21 01:14:06,412 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-21 01:14:06,413 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-21 01:14:06,413 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test_union_cast.i
[2020-07-21 01:14:06,488 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfc960726/a1945beb10e840139181c4c6d189ba63/FLAGe586c31ae
[2020-07-21 01:14:06,951 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-21 01:14:06,952 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test_union_cast.i
[2020-07-21 01:14:06,959 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfc960726/a1945beb10e840139181c4c6d189ba63/FLAGe586c31ae
[2020-07-21 01:14:07,318 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfc960726/a1945beb10e840139181c4c6d189ba63
[2020-07-21 01:14:07,327 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-21 01:14:07,330 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-21 01:14:07,331 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-21 01:14:07,331 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-21 01:14:07,335 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-21 01:14:07,336 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:14:07" (1/1) ...
[2020-07-21 01:14:07,339 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25060991 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07, skipping insertion in model container
[2020-07-21 01:14:07,339 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:14:07" (1/1) ...
[2020-07-21 01:14:07,348 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-21 01:14:07,368 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-21 01:14:07,541 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:14:07,555 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-21 01:14:07,573 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:14:07,590 INFO  L208         MainTranslator]: Completed translation
[2020-07-21 01:14:07,591 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07 WrapperNode
[2020-07-21 01:14:07,592 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-21 01:14:07,593 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-21 01:14:07,593 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-21 01:14:07,593 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-21 01:14:07,606 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07" (1/1) ...
[2020-07-21 01:14:07,608 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07" (1/1) ...
[2020-07-21 01:14:07,697 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07" (1/1) ...
[2020-07-21 01:14:07,698 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07" (1/1) ...
[2020-07-21 01:14:07,703 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07" (1/1) ...
[2020-07-21 01:14:07,704 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07" (1/1) ...
[2020-07-21 01:14:07,705 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07" (1/1) ...
[2020-07-21 01:14:07,706 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-21 01:14:07,707 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-21 01:14:07,707 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-21 01:14:07,707 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-21 01:14:07,708 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07" (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
[2020-07-21 01:14:07,759 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-21 01:14:07,759 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-21 01:14:07,760 INFO  L138     BoogieDeclarations]: Found implementation of procedure __blast_assert
[2020-07-21 01:14:07,760 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-21 01:14:07,760 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-21 01:14:07,760 INFO  L130     BoogieDeclarations]: Found specification of procedure __blast_assert
[2020-07-21 01:14:07,760 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-21 01:14:07,760 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-21 01:14:07,760 INFO  L130     BoogieDeclarations]: Found specification of procedure write~real
[2020-07-21 01:14:07,761 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-21 01:14:07,761 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-21 01:14:07,761 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-21 01:14:07,761 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-21 01:14:07,761 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-21 01:14:07,761 INFO  L130     BoogieDeclarations]: Found specification of procedure read~real
[2020-07-21 01:14:08,000 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-21 01:14:08,001 INFO  L295             CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-21 01:14:08,008 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:08 BoogieIcfgContainer
[2020-07-21 01:14:08,008 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-21 01:14:08,013 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-21 01:14:08,013 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-21 01:14:08,021 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-21 01:14:08,022 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:14:07" (1/3) ...
[2020-07-21 01:14:08,023 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8ce3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:08, skipping insertion in model container
[2020-07-21 01:14:08,023 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:14:07" (2/3) ...
[2020-07-21 01:14:08,023 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a8ce3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:14:08, skipping insertion in model container
[2020-07-21 01:14:08,023 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:14:08" (3/3) ...
[2020-07-21 01:14:08,028 INFO  L109   eAbstractionObserver]: Analyzing ICFG test_union_cast.i
[2020-07-21 01:14:08,051 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-21 01:14:08,067 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-21 01:14:08,083 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-21 01:14:08,108 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-21 01:14:08,108 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-21 01:14:08,108 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-21 01:14:08,108 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-21 01:14:08,109 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-21 01:14:08,109 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-21 01:14:08,109 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-21 01:14:08,109 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-21 01:14:08,128 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states.
[2020-07-21 01:14:08,134 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 10
[2020-07-21 01:14:08,134 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:14:08,135 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:14:08,135 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:14:08,140 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:14:08,141 INFO  L82        PathProgramCache]: Analyzing trace with hash -1215743292, now seen corresponding path program 1 times
[2020-07-21 01:14:08,147 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:14:08,148 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435673230]
[2020-07-21 01:14:08,148 INFO  L95    rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
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
[2020-07-21 01:14:08,237 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 01:14:08,238 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:14:08,243 INFO  L263         TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-21 01:14:08,249 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:14:08,307 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 01:14:08,307 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:14:08,308 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435673230]
[2020-07-21 01:14:08,309 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:14:08,309 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-21 01:14:08,310 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191374928]
[2020-07-21 01:14:08,315 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-21 01:14:08,316 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:14:08,327 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-21 01:14:08,328 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:14:08,330 INFO  L87              Difference]: Start difference. First operand 17 states. Second operand 3 states.
[2020-07-21 01:14:08,363 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:14:08,364 INFO  L93              Difference]: Finished difference Result 22 states and 21 transitions.
[2020-07-21 01:14:08,365 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-21 01:14:08,366 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 9
[2020-07-21 01:14:08,367 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:14:08,372 INFO  L225             Difference]: With dead ends: 22
[2020-07-21 01:14:08,373 INFO  L226             Difference]: Without dead ends: 0
[2020-07-21 01:14:08,376 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-21 01:14:08,390 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-21 01:14:08,397 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-21 01:14:08,399 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-21 01:14:08,399 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-21 01:14:08,401 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 9
[2020-07-21 01:14:08,401 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:14:08,401 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-21 01:14:08,402 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-21 01:14:08,402 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-21 01:14:08,402 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-21 01:14:08,617 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:14:08,621 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-21 01:14:08,669 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initFINAL(line -1)  no Hoare annotation was computed.
[2020-07-21 01:14:08,670 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initENTRY(line -1)  the Hoare annotation is:  true
[2020-07-21 01:14:08,670 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-07-21 01:14:08,670 INFO  L268        CegarLoopResult]: For program point  __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6)  no Hoare annotation was computed.
[2020-07-21 01:14:08,671 INFO  L268        CegarLoopResult]: For program point  __blast_assertEXIT(lines 4 7)  no Hoare annotation was computed.
[2020-07-21 01:14:08,671 INFO  L268        CegarLoopResult]: For program point  __blast_assertFINAL(lines 4 7)  no Hoare annotation was computed.
[2020-07-21 01:14:08,671 INFO  L271        CegarLoopResult]: At program point  __blast_assertENTRY(lines 4 7)  the Hoare annotation is:  true
[2020-07-21 01:14:08,671 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-07-21 01:14:08,671 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-07-21 01:14:08,672 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-07-21 01:14:08,672 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-07-21 01:14:08,672 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 19 32)  the Hoare annotation is:  true
[2020-07-21 01:14:08,672 INFO  L268        CegarLoopResult]: For program point  L29(line 29)  no Hoare annotation was computed.
[2020-07-21 01:14:08,672 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 19 32)  no Hoare annotation was computed.
[2020-07-21 01:14:08,672 INFO  L264        CegarLoopResult]: At program point  L29-2(line 29)  the Hoare annotation is:  false
[2020-07-21 01:14:08,673 INFO  L268        CegarLoopResult]: For program point  L29-3(line 29)  no Hoare annotation was computed.
[2020-07-21 01:14:08,673 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 19 32)  no Hoare annotation was computed.
[2020-07-21 01:14:08,678 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:14:08 BoogieIcfgContainer
[2020-07-21 01:14:08,678 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-21 01:14:08,681 INFO  L168              Benchmark]: Toolchain (without parser) took 1351.39 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 102.1 MB in the beginning and 139.9 MB in the end (delta: -37.7 MB). Peak memory consumption was 26.7 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:08,682 INFO  L168              Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-21 01:14:08,683 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 261.50 ms. Allocated memory is still 137.9 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:08,684 INFO  L168              Benchmark]: Boogie Preprocessor took 113.79 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.9 MB in the beginning and 181.0 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:08,685 INFO  L168              Benchmark]: RCFGBuilder took 301.56 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 167.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:08,686 INFO  L168              Benchmark]: TraceAbstraction took 665.61 ms. Allocated memory is still 202.4 MB. Free memory was 167.8 MB in the beginning and 139.9 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB.
[2020-07-21 01:14:08,691 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.25 ms. Allocated memory is still 137.9 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 261.50 ms. Allocated memory is still 137.9 MB. Free memory was 101.7 MB in the beginning and 91.9 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 113.79 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.9 MB in the beginning and 181.0 MB in the end (delta: -89.0 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 301.56 ms. Allocated memory is still 202.4 MB. Free memory was 181.0 MB in the beginning and 167.8 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 665.61 ms. Allocated memory is still 202.4 MB. Free memory was 167.8 MB in the beginning and 139.9 MB in the end (delta: 27.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 6]: 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, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.5s, OverallIterations: 1, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 1 SDslu, 8 SDs, 0 SdLazy, 2 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 6 NumberOfFragments, 6 HoareAnnotationTreeSize, 6 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 9 NumberOfCodeBlocks, 9 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 80 SizeOfPredicates, 4 NumberOfNonLiveVariables, 48 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...