/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/array-fpi/condaf.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-21 01:38:10,912 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-21 01:38:10,915 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-21 01:38:10,932 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-21 01:38:10,933 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-21 01:38:10,934 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-21 01:38:10,935 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-21 01:38:10,937 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-21 01:38:10,939 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-21 01:38:10,940 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-21 01:38:10,941 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-21 01:38:10,942 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-21 01:38:10,942 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-21 01:38:10,943 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-21 01:38:10,944 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-21 01:38:10,945 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-21 01:38:10,946 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-21 01:38:10,947 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-21 01:38:10,949 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-21 01:38:10,951 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-21 01:38:10,953 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-21 01:38:10,954 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-21 01:38:10,955 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-21 01:38:10,956 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-21 01:38:10,959 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-21 01:38:10,959 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-21 01:38:10,959 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-21 01:38:10,960 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-21 01:38:10,961 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-21 01:38:10,962 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-21 01:38:10,962 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-21 01:38:10,963 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-21 01:38:10,964 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-21 01:38:10,965 INFO  L181        SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-21 01:38:10,966 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-21 01:38:10,966 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-21 01:38:10,967 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-07-21 01:38:10,967 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-21 01:38:10,969 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-21 01:38:10,969 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 01:38:10,984 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-21 01:38:10,984 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-21 01:38:10,986 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-21 01:38:10,986 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-21 01:38:10,986 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-21 01:38:10,987 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-21 01:38:10,987 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-21 01:38:10,987 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-21 01:38:10,987 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-21 01:38:10,987 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-21 01:38:10,988 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-21 01:38:10,988 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-21 01:38:10,988 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-21 01:38:10,988 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-21 01:38:10,988 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-21 01:38:10,989 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-21 01:38:10,989 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-21 01:38:10,989 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-21 01:38:10,989 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-21 01:38:10,989 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-21 01:38:10,990 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-21 01:38:10,990 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 01:38:10,990 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-21 01:38:10,990 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-21 01:38:10,991 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-21 01:38:10,991 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-21 01:38:10,991 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:38:10,991 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-21 01:38:10,991 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-21 01:38:10,991 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 01:38:11,292 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-21 01:38:11,306 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-21 01:38:11,309 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-21 01:38:11,311 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-21 01:38:11,311 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-21 01:38:11,312 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condaf.c
[2020-07-21 01:38:11,382 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f260e1b1/4860ec224be64e4a94b400910be65ca9/FLAGb6641f09e
[2020-07-21 01:38:11,837 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-21 01:38:11,837 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condaf.c
[2020-07-21 01:38:11,845 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f260e1b1/4860ec224be64e4a94b400910be65ca9/FLAGb6641f09e
[2020-07-21 01:38:12,186 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f260e1b1/4860ec224be64e4a94b400910be65ca9
[2020-07-21 01:38:12,198 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-21 01:38:12,201 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-21 01:38:12,203 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-21 01:38:12,203 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-21 01:38:12,207 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-21 01:38:12,209 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:12" (1/1) ...
[2020-07-21 01:38:12,213 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f443bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12, skipping insertion in model container
[2020-07-21 01:38:12,213 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:12" (1/1) ...
[2020-07-21 01:38:12,223 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-21 01:38:12,243 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-21 01:38:12,445 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:38:12,456 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-21 01:38:12,482 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:38:12,501 INFO  L208         MainTranslator]: Completed translation
[2020-07-21 01:38:12,501 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12 WrapperNode
[2020-07-21 01:38:12,501 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-21 01:38:12,502 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-21 01:38:12,502 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-21 01:38:12,503 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-21 01:38:12,609 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ...
[2020-07-21 01:38:12,610 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ...
[2020-07-21 01:38:12,619 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ...
[2020-07-21 01:38:12,620 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ...
[2020-07-21 01:38:12,630 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ...
[2020-07-21 01:38:12,644 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ...
[2020-07-21 01:38:12,646 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (1/1) ...
[2020-07-21 01:38:12,649 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-21 01:38:12,649 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-21 01:38:12,650 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-21 01:38:12,650 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-21 01:38:12,651 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (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 01:38:12,728 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-21 01:38:12,728 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-21 01:38:12,729 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-21 01:38:12,729 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-21 01:38:12,729 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-21 01:38:12,729 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-21 01:38:12,729 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-21 01:38:12,730 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-21 01:38:12,730 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-21 01:38:12,730 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-21 01:38:12,730 INFO  L130     BoogieDeclarations]: Found specification of procedure malloc
[2020-07-21 01:38:12,730 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-21 01:38:12,730 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack
[2020-07-21 01:38:12,731 INFO  L130     BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap
[2020-07-21 01:38:12,731 INFO  L130     BoogieDeclarations]: Found specification of procedure write~int
[2020-07-21 01:38:12,731 INFO  L130     BoogieDeclarations]: Found specification of procedure read~int
[2020-07-21 01:38:12,731 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc
[2020-07-21 01:38:12,731 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-21 01:38:12,731 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-21 01:38:13,012 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-21 01:38:13,012 INFO  L295             CfgBuilder]: Removed 3 assume(true) statements.
[2020-07-21 01:38:13,017 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:13 BoogieIcfgContainer
[2020-07-21 01:38:13,017 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-21 01:38:13,019 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-21 01:38:13,019 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-21 01:38:13,022 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-21 01:38:13,022 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:38:12" (1/3) ...
[2020-07-21 01:38:13,023 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4988e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:13, skipping insertion in model container
[2020-07-21 01:38:13,023 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:12" (2/3) ...
[2020-07-21 01:38:13,024 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c4988e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:13, skipping insertion in model container
[2020-07-21 01:38:13,024 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:13" (3/3) ...
[2020-07-21 01:38:13,026 INFO  L109   eAbstractionObserver]: Analyzing ICFG condaf.c
[2020-07-21 01:38:13,037 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-21 01:38:13,046 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-21 01:38:13,064 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-21 01:38:13,102 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-21 01:38:13,102 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-21 01:38:13,102 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-21 01:38:13,103 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-21 01:38:13,103 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-21 01:38:13,103 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-21 01:38:13,103 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-21 01:38:13,104 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-21 01:38:13,130 INFO  L276                IsEmpty]: Start isEmpty. Operand 35 states.
[2020-07-21 01:38:13,138 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-21 01:38:13,139 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:38:13,140 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:38:13,140 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:38:13,147 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:38:13,148 INFO  L82        PathProgramCache]: Analyzing trace with hash -88121349, now seen corresponding path program 1 times
[2020-07-21 01:38:13,158 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:38:13,159 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862055088]
[2020-07-21 01:38:13,160 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 01:38:13,315 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-21 01:38:13,316 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:38:13,319 INFO  L263         TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-21 01:38:13,326 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:38:13,351 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 01:38:13,352 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:38:13,353 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862055088]
[2020-07-21 01:38:13,354 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:38:13,355 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-21 01:38:13,356 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120519251]
[2020-07-21 01:38:13,362 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-21 01:38:13,362 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:38:13,375 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-21 01:38:13,376 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-21 01:38:13,378 INFO  L87              Difference]: Start difference. First operand 35 states. Second operand 2 states.
[2020-07-21 01:38:13,407 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:38:13,408 INFO  L93              Difference]: Finished difference Result 60 states and 77 transitions.
[2020-07-21 01:38:13,408 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-21 01:38:13,410 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 23
[2020-07-21 01:38:13,410 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:38:13,420 INFO  L225             Difference]: With dead ends: 60
[2020-07-21 01:38:13,420 INFO  L226             Difference]: Without dead ends: 28
[2020-07-21 01:38:13,426 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-21 01:38:13,450 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-07-21 01:38:13,476 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2020-07-21 01:38:13,478 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-07-21 01:38:13,483 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions.
[2020-07-21 01:38:13,485 INFO  L78                 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23
[2020-07-21 01:38:13,486 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:38:13,486 INFO  L479      AbstractCegarLoop]: Abstraction has 28 states and 31 transitions.
[2020-07-21 01:38:13,486 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-21 01:38:13,486 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions.
[2020-07-21 01:38:13,489 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 24
[2020-07-21 01:38:13,489 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:38:13,490 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:38:13,705 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:38:13,705 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:38:13,706 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:38:13,707 INFO  L82        PathProgramCache]: Analyzing trace with hash -1099238599, now seen corresponding path program 1 times
[2020-07-21 01:38:13,707 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:38:13,708 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111330241]
[2020-07-21 01:38:13,708 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 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
[2020-07-21 01:38:13,770 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 01:38:13,771 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:38:13,772 INFO  L263         TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-21 01:38:13,775 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:38:13,822 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 01:38:13,823 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:38:13,823 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111330241]
[2020-07-21 01:38:13,823 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:38:13,824 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4
[2020-07-21 01:38:13,824 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023970316]
[2020-07-21 01:38:13,826 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 4 states
[2020-07-21 01:38:13,827 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:38:13,827 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants.
[2020-07-21 01:38:13,828 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-21 01:38:13,828 INFO  L87              Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 4 states.
[2020-07-21 01:38:13,932 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:38:13,933 INFO  L93              Difference]: Finished difference Result 48 states and 57 transitions.
[2020-07-21 01:38:13,933 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. 
[2020-07-21 01:38:13,933 INFO  L78                 Accepts]: Start accepts. Automaton has 4 states. Word has length 23
[2020-07-21 01:38:13,934 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:38:13,935 INFO  L225             Difference]: With dead ends: 48
[2020-07-21 01:38:13,935 INFO  L226             Difference]: Without dead ends: 35
[2020-07-21 01:38:13,937 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12
[2020-07-21 01:38:13,937 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2020-07-21 01:38:13,943 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31.
[2020-07-21 01:38:13,944 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2020-07-21 01:38:13,945 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions.
[2020-07-21 01:38:13,945 INFO  L78                 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23
[2020-07-21 01:38:13,946 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:38:13,946 INFO  L479      AbstractCegarLoop]: Abstraction has 31 states and 34 transitions.
[2020-07-21 01:38:13,946 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 4 states.
[2020-07-21 01:38:13,946 INFO  L276                IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions.
[2020-07-21 01:38:13,947 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-07-21 01:38:13,947 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:38:13,947 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:38:14,161 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:38:14,162 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:38:14,163 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:38:14,163 INFO  L82        PathProgramCache]: Analyzing trace with hash 188437731, now seen corresponding path program 1 times
[2020-07-21 01:38:14,164 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:38:14,165 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334129410]
[2020-07-21 01:38:14,166 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 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
[2020-07-21 01:38:14,220 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 01:38:14,221 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:38:14,222 INFO  L263         TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-21 01:38:14,225 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:38:14,284 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7
[2020-07-21 01:38:14,285 INFO  L544         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2020-07-21 01:38:14,294 INFO  L624         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-21 01:38:14,295 INFO  L544         ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-21 01:38:14,295 INFO  L244         ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7
[2020-07-21 01:38:14,330 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7
[2020-07-21 01:38:14,331 INFO  L544         ElimStorePlain]: Start of recursive call 2:  End of recursive call:  and 1 xjuncts.
[2020-07-21 01:38:14,333 INFO  L624         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-21 01:38:14,334 INFO  L544         ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-21 01:38:14,334 INFO  L244         ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3
[2020-07-21 01:38:14,347 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-21 01:38:14,348 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-21 01:38:14,398 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12
[2020-07-21 01:38:14,412 INFO  L384             Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20
[2020-07-21 01:38:14,413 INFO  L544         ElimStorePlain]: Start of recursive call 3:  End of recursive call:  and 1 xjuncts.
[2020-07-21 01:38:14,415 INFO  L624         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-21 01:38:14,415 INFO  L544         ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars,  End of recursive call:  and 1 xjuncts.
[2020-07-21 01:38:14,418 INFO  L624         ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size
[2020-07-21 01:38:14,418 INFO  L544         ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars,  End of recursive call: 1 dim-0 vars,  and 1 xjuncts.
[2020-07-21 01:38:14,419 INFO  L244         ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:14, output treesize:7
[2020-07-21 01:38:14,439 INFO  L134       CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-21 01:38:14,440 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334129410]
[2020-07-21 01:38:14,440 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-21 01:38:14,440 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8
[2020-07-21 01:38:14,440 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952264216]
[2020-07-21 01:38:14,441 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-07-21 01:38:14,441 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:38:14,442 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-07-21 01:38:14,442 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56
[2020-07-21 01:38:14,442 INFO  L87              Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 8 states.
[2020-07-21 01:38:14,609 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:38:14,609 INFO  L93              Difference]: Finished difference Result 48 states and 54 transitions.
[2020-07-21 01:38:14,610 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. 
[2020-07-21 01:38:14,610 INFO  L78                 Accepts]: Start accepts. Automaton has 8 states. Word has length 30
[2020-07-21 01:38:14,611 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:38:14,611 INFO  L225             Difference]: With dead ends: 48
[2020-07-21 01:38:14,612 INFO  L226             Difference]: Without dead ends: 35
[2020-07-21 01:38:14,613 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2020-07-21 01:38:14,613 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 35 states.
[2020-07-21 01:38:14,626 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32.
[2020-07-21 01:38:14,626 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 32 states.
[2020-07-21 01:38:14,627 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions.
[2020-07-21 01:38:14,628 INFO  L78                 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 30
[2020-07-21 01:38:14,630 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:38:14,631 INFO  L479      AbstractCegarLoop]: Abstraction has 32 states and 35 transitions.
[2020-07-21 01:38:14,631 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-07-21 01:38:14,631 INFO  L276                IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions.
[2020-07-21 01:38:14,632 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 31
[2020-07-21 01:38:14,632 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:38:14,632 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:38:14,833 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:38:14,833 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:38:14,834 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:38:14,834 INFO  L82        PathProgramCache]: Analyzing trace with hash 446603169, now seen corresponding path program 1 times
[2020-07-21 01:38:14,834 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:38:14,834 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576622654]
[2020-07-21 01:38:14,834 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 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
[2020-07-21 01:38:14,903 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:38:14,904 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-21 01:38:14,904 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 01:38:14,923 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-21 01:38:14,923 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 01:38:14,951 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-21 01:38:14,952 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-21 01:38:15,165 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:38:15,223 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:38:15 BoogieIcfgContainer
[2020-07-21 01:38:15,225 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-21 01:38:15,227 INFO  L168              Benchmark]: Toolchain (without parser) took 3026.98 ms. Allocated memory was 136.8 MB in the beginning and 231.2 MB in the end (delta: 94.4 MB). Free memory was 100.0 MB in the beginning and 176.3 MB in the end (delta: -76.3 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB.
[2020-07-21 01:38:15,228 INFO  L168              Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB.
[2020-07-21 01:38:15,229 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 299.17 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 88.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB.
[2020-07-21 01:38:15,230 INFO  L168              Benchmark]: Boogie Preprocessor took 146.69 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 88.9 MB in the beginning and 179.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB.
[2020-07-21 01:38:15,230 INFO  L168              Benchmark]: RCFGBuilder took 367.93 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.6 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB.
[2020-07-21 01:38:15,231 INFO  L168              Benchmark]: TraceAbstraction took 2206.12 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 160.6 MB in the beginning and 176.3 MB in the end (delta: -15.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB.
[2020-07-21 01:38:15,235 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory is still 118.3 MB. There was no memory consumed. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 299.17 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 88.9 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 146.69 ms. Allocated memory was 136.8 MB in the beginning and 201.9 MB in the end (delta: 65.0 MB). Free memory was 88.9 MB in the beginning and 179.3 MB in the end (delta: -90.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 367.93 ms. Allocated memory is still 201.9 MB. Free memory was 179.3 MB in the beginning and 161.6 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 2206.12 ms. Allocated memory was 201.9 MB in the beginning and 231.2 MB in the end (delta: 29.4 MB). Free memory was 160.6 MB in the beginning and 176.3 MB in the end (delta: -15.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L17]              int N;
       VAL         [\old(N)=6, N=0]
[L21]              N = __VERIFIER_nondet_int()
[L22]  COND FALSE  !(N <= 0)
       VAL         [\old(N)=0, N=1]
[L23]  CALL        assume_abort_if_not(N <= 2147483647/sizeof(int))
       VAL         [\old(cond)=1, \old(N)=0, N=1]
[L11]  COND FALSE  !(!cond)
       VAL         [\old(cond)=1, \old(N)=0, cond=1, N=1]
[L23]  RET         assume_abort_if_not(N <= 2147483647/sizeof(int))
       VAL         [\old(N)=0, N=1]
[L25]              int i;
[L26]              int sum[1];
[L27]              int *a = malloc(sizeof(int)*N);
[L29]              sum[0] = 0
[L30]              i=0
       VAL         [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L30]  COND TRUE   i<N
[L32]              a[i] = 1
       VAL         [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L30]              i++
       VAL         [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L30]  COND FALSE  !(i<N)
       VAL         [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L35]              i=0
       VAL         [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L35]  COND TRUE   i<N
[L37]  EXPR        a[i]
       VAL         [\old(N)=0, a={-1:0}, a[i]=1, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L37]  COND FALSE  !(a[i] == 0)
[L40]  EXPR        a[i]
[L40]              a[i] = a[i] - 1
[L35]              i++
       VAL         [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L35]  COND FALSE  !(i<N)
       VAL         [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L44]              i=0
       VAL         [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L44]  COND TRUE   i<N
[L46]  EXPR        sum[0]
[L46]  EXPR        a[i]
[L46]              sum[0] = sum[0] + a[i]
[L44]              i++
       VAL         [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L44]  COND FALSE  !(i<N)
       VAL         [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}]
[L49]  EXPR        sum[0]
       VAL         [\old(N)=0, a={-1:0}, i=1, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}, sum[0]=0]
[L49]  CALL        __VERIFIER_assert(sum[0] == 2*N)
       VAL         [\old(cond)=0, \old(N)=0, N=1]
[L13]  COND TRUE   !(cond)
       VAL         [\old(cond)=0, \old(N)=0, cond=0, N=1]
[L13]              __VERIFIER_error()
       VAL         [\old(cond)=0, \old(N)=0, cond=0, N=1]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 82 SDtfs, 34 SDslu, 86 SDs, 0 SdLazy, 79 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 105 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 7 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 106 NumberOfCodeBlocks, 84 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 102 ConstructedInterpolants, 0 QuantifiedInterpolants, 4902 SizeOfPredicates, 10 NumberOfNonLiveVariables, 227 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 4/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be incorrect!
Received shutdown request...