/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/loops/trex01-1.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-21 01:43:15,158 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-21 01:43:15,161 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-21 01:43:15,178 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-21 01:43:15,179 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-21 01:43:15,181 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-21 01:43:15,183 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-21 01:43:15,186 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-21 01:43:15,189 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-21 01:43:15,190 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-21 01:43:15,192 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-21 01:43:15,194 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-21 01:43:15,195 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-21 01:43:15,196 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-21 01:43:15,199 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-21 01:43:15,201 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-21 01:43:15,203 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-21 01:43:15,204 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-21 01:43:15,206 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-21 01:43:15,210 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-21 01:43:15,212 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-21 01:43:15,214 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-21 01:43:15,216 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-21 01:43:15,218 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-21 01:43:15,222 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-21 01:43:15,222 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-21 01:43:15,223 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-21 01:43:15,225 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-21 01:43:15,226 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-21 01:43:15,227 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-21 01:43:15,228 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-21 01:43:15,232 INFO  L181        SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-21 01:43:15,234 INFO  L181        SettingsManager]: Resetting ReqPrinter preferences to default values
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[2020-07-21 01:43:15,242 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-21 01:43:15,243 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-21 01:43:15,245 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-21 01:43:15,249 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-21 01:43:15,250 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 01:43:15,273 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-21 01:43:15,274 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-21 01:43:15,276 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-21 01:43:15,277 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-21 01:43:15,277 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-21 01:43:15,277 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-21 01:43:15,277 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-21 01:43:15,278 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-21 01:43:15,278 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-21 01:43:15,278 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-21 01:43:15,278 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-21 01:43:15,278 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-21 01:43:15,279 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-21 01:43:15,279 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-21 01:43:15,279 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-21 01:43:15,279 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-21 01:43:15,279 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-21 01:43:15,280 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-21 01:43:15,280 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-21 01:43:15,280 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-21 01:43:15,280 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-21 01:43:15,281 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 01:43:15,281 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-21 01:43:15,281 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-21 01:43:15,281 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-21 01:43:15,281 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-21 01:43:15,282 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:43:15,282 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-21 01:43:15,282 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-21 01:43:15,282 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 01:43:15,701 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-21 01:43:15,722 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-21 01:43:15,728 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-21 01:43:15,731 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-21 01:43:15,732 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-21 01:43:15,733 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-1.c
[2020-07-21 01:43:15,842 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d939c8fd/d332ccd6f65e4f80806f6df4bf42fb9b/FLAG380a10f00
[2020-07-21 01:43:16,594 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-21 01:43:16,595 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c
[2020-07-21 01:43:16,612 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d939c8fd/d332ccd6f65e4f80806f6df4bf42fb9b/FLAG380a10f00
[2020-07-21 01:43:16,889 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d939c8fd/d332ccd6f65e4f80806f6df4bf42fb9b
[2020-07-21 01:43:16,908 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-21 01:43:16,912 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-21 01:43:16,914 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-21 01:43:16,915 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-21 01:43:16,920 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-21 01:43:16,922 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:43:16" (1/1) ...
[2020-07-21 01:43:16,928 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@612f78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:16, skipping insertion in model container
[2020-07-21 01:43:16,928 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:43:16" (1/1) ...
[2020-07-21 01:43:16,941 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-21 01:43:16,969 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-21 01:43:17,216 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:43:17,224 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-21 01:43:17,251 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-21 01:43:17,273 INFO  L208         MainTranslator]: Completed translation
[2020-07-21 01:43:17,274 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17 WrapperNode
[2020-07-21 01:43:17,274 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-21 01:43:17,276 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-21 01:43:17,277 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-21 01:43:17,277 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-21 01:43:17,295 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17" (1/1) ...
[2020-07-21 01:43:17,296 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17" (1/1) ...
[2020-07-21 01:43:17,303 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17" (1/1) ...
[2020-07-21 01:43:17,304 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17" (1/1) ...
[2020-07-21 01:43:17,311 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17" (1/1) ...
[2020-07-21 01:43:17,320 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17" (1/1) ...
[2020-07-21 01:43:17,322 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17" (1/1) ...
[2020-07-21 01:43:17,437 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-21 01:43:17,438 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-21 01:43:17,438 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-21 01:43:17,438 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-21 01:43:17,439 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17" (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 01:43:17,555 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-21 01:43:17,555 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-21 01:43:17,556 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-21 01:43:17,556 INFO  L138     BoogieDeclarations]: Found implementation of procedure f
[2020-07-21 01:43:17,556 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-21 01:43:17,557 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-21 01:43:17,558 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-21 01:43:17,558 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-21 01:43:17,558 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-21 01:43:17,559 INFO  L130     BoogieDeclarations]: Found specification of procedure f
[2020-07-21 01:43:17,560 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-21 01:43:17,560 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-21 01:43:17,560 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-21 01:43:17,889 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-21 01:43:17,889 INFO  L295             CfgBuilder]: Removed 2 assume(true) statements.
[2020-07-21 01:43:17,896 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:43:17 BoogieIcfgContainer
[2020-07-21 01:43:17,896 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-21 01:43:17,898 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-21 01:43:17,898 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-21 01:43:17,904 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-21 01:43:17,905 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:43:16" (1/3) ...
[2020-07-21 01:43:17,907 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2c8556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:43:17, skipping insertion in model container
[2020-07-21 01:43:17,908 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:43:17" (2/3) ...
[2020-07-21 01:43:17,909 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f2c8556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:43:17, skipping insertion in model container
[2020-07-21 01:43:17,910 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:43:17" (3/3) ...
[2020-07-21 01:43:17,913 INFO  L109   eAbstractionObserver]: Analyzing ICFG trex01-1.c
[2020-07-21 01:43:17,930 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-21 01:43:17,954 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-21 01:43:17,974 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-21 01:43:18,004 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-21 01:43:18,004 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-21 01:43:18,004 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-21 01:43:18,005 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-21 01:43:18,005 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-21 01:43:18,005 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-21 01:43:18,005 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-21 01:43:18,006 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-21 01:43:18,030 INFO  L276                IsEmpty]: Start isEmpty. Operand 28 states.
[2020-07-21 01:43:18,043 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-21 01:43:18,043 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:43:18,044 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:43:18,044 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:43:18,050 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:43:18,051 INFO  L82        PathProgramCache]: Analyzing trace with hash -355556993, now seen corresponding path program 1 times
[2020-07-21 01:43:18,060 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:43:18,061 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943242461]
[2020-07-21 01:43:18,061 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 01:43:18,129 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 01:43:18,130 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 01:43:18,132 INFO  L263         TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-21 01:43:18,137 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 01:43:18,157 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 01:43:18,157 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 01:43:18,158 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943242461]
[2020-07-21 01:43:18,159 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 01:43:18,159 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-21 01:43:18,160 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360663368]
[2020-07-21 01:43:18,164 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-21 01:43:18,164 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 01:43:18,174 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-21 01:43:18,175 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-21 01:43:18,177 INFO  L87              Difference]: Start difference. First operand 28 states. Second operand 2 states.
[2020-07-21 01:43:18,202 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 01:43:18,202 INFO  L93              Difference]: Finished difference Result 45 states and 58 transitions.
[2020-07-21 01:43:18,203 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-21 01:43:18,204 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 14
[2020-07-21 01:43:18,205 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 01:43:18,214 INFO  L225             Difference]: With dead ends: 45
[2020-07-21 01:43:18,215 INFO  L226             Difference]: Without dead ends: 16
[2020-07-21 01:43:18,219 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 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 01:43:18,237 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 16 states.
[2020-07-21 01:43:18,258 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16.
[2020-07-21 01:43:18,260 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 16 states.
[2020-07-21 01:43:18,261 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions.
[2020-07-21 01:43:18,263 INFO  L78                 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14
[2020-07-21 01:43:18,263 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-21 01:43:18,263 INFO  L479      AbstractCegarLoop]: Abstraction has 16 states and 17 transitions.
[2020-07-21 01:43:18,263 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-21 01:43:18,264 INFO  L276                IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions.
[2020-07-21 01:43:18,264 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-21 01:43:18,264 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-21 01:43:18,265 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 01:43:18,481 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:43:18,481 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 01:43:18,482 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 01:43:18,482 INFO  L82        PathProgramCache]: Analyzing trace with hash -359251077, now seen corresponding path program 1 times
[2020-07-21 01:43:18,483 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 01:43:18,484 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623167359]
[2020-07-21 01:43:18,484 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 01:43:18,541 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 01:43:18,541 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-21 01:43:18,542 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 01:43:18,556 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-21 01:43:18,557 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-21 01:43:18,580 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-21 01:43:18,581 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-21 01:43:18,797 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 01:43:18,834 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:43:18 BoogieIcfgContainer
[2020-07-21 01:43:18,834 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-21 01:43:18,838 INFO  L168              Benchmark]: Toolchain (without parser) took 1926.35 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 99.4 MB in the beginning and 136.6 MB in the end (delta: -37.3 MB). Peak memory consumption was 27.8 MB. Max. memory is 7.1 GB.
[2020-07-21 01:43:18,839 INFO  L168              Benchmark]: CDTParser took 0.62 ms. Allocated memory is still 135.8 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-21 01:43:18,840 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 361.17 ms. Allocated memory is still 135.8 MB. Free memory was 99.0 MB in the beginning and 89.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
[2020-07-21 01:43:18,841 INFO  L168              Benchmark]: Boogie Preprocessor took 161.08 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 89.3 MB in the beginning and 180.9 MB in the end (delta: -91.5 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB.
[2020-07-21 01:43:18,842 INFO  L168              Benchmark]: RCFGBuilder took 458.86 ms. Allocated memory is still 200.8 MB. Free memory was 180.9 MB in the beginning and 165.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB.
[2020-07-21 01:43:18,843 INFO  L168              Benchmark]: TraceAbstraction took 936.47 ms. Allocated memory is still 200.8 MB. Free memory was 165.9 MB in the beginning and 136.6 MB in the end (delta: 29.3 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB.
[2020-07-21 01:43:18,848 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.62 ms. Allocated memory is still 135.8 MB. Free memory was 117.6 MB in the beginning and 117.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 361.17 ms. Allocated memory is still 135.8 MB. Free memory was 99.0 MB in the beginning and 89.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 161.08 ms. Allocated memory was 135.8 MB in the beginning and 200.8 MB in the end (delta: 65.0 MB). Free memory was 89.3 MB in the beginning and 180.9 MB in the end (delta: -91.5 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 458.86 ms. Allocated memory is still 200.8 MB. Free memory was 180.9 MB in the beginning and 165.9 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 936.47 ms. Allocated memory is still 200.8 MB. Free memory was 165.9 MB in the beginning and 136.6 MB in the end (delta: 29.3 MB). Peak memory consumption was 29.3 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable
    a call of __VERIFIER_error() is reachable
We found a FailurePath: 
[L34]              _Bool c = __VERIFIER_nondet_bool();
[L35]  COND FALSE  !(\read(c))
       VAL         [c=0]
[L38]  CALL        f(2)
       VAL         [\old(d)=2]
[L13]              int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1;
[L13]              int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1;
[L13]              int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1;
[L13]              int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1;
       VAL         [\old(d)=2, d=2, k=0, x=0, y=0, z=1]
[L14]  COND FALSE  !(!(k <= 1073741823))
       VAL         [\old(d)=2, d=2, k=0, x=0, y=0, z=1]
[L17]  COND FALSE  !(z < k)
       VAL         [\old(d)=2, d=2, k=0, x=0, y=0, z=1]
[L18]  CALL        __VERIFIER_assert(z>=2)
       VAL         [\old(cond)=0]
[L4]   COND TRUE   !(cond)
       VAL         [\old(cond)=0, cond=0]
[L5]               __VERIFIER_error()
       VAL         [\old(cond)=0, cond=0]

  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 33 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred 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: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 28 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 169 SizeOfPredicates, 0 NumberOfNonLiveVariables, 42 ConjunctsInSsa, 1 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 incorrect!
Received shutdown request...