/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 NUM_FUNCTIONS --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/loop-acceleration/underapprox_2-1.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 14:20:58,943 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 14:20:58,949 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 14:20:58,971 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 14:20:58,972 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 14:20:58,975 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 14:20:58,977 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-07-20 14:20:58,991 INFO  L181        SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 14:20:58,995 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 14:20:58,997 INFO  L181        SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 14:20:58,999 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 14:20:58,999 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 14:20:59,003 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 14:20:59,004 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 14:20:59,005 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 14:20:59,008 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 14:20:59,010 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 14:20:59,012 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 14:20:59,017 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 14:20:59,019 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 14:20:59,023 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 14:20:59,027 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 14:20:59,027 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 14:20:59,030 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 14:20:59,030 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 14:20:59,030 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 14:20:59,033 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 14:20:59,034 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 14:20:59,035 INFO  L184        SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 14:20:59,035 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-20 14:20:59,040 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 14:20:59,042 INFO  L184        SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
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[2020-07-20 14:20:59,042 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 14:20:59,045 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 14:20:59,045 INFO  L101        SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 14:20:59,070 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 14:20:59,071 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 14:20:59,073 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 14:20:59,073 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 14:20:59,073 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 14:20:59,074 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 14:20:59,074 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 14:20:59,074 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 14:20:59,074 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 14:20:59,074 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 14:20:59,075 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 14:20:59,076 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 14:20:59,076 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 14:20:59,076 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 14:20:59,077 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 14:20:59,077 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 14:20:59,077 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 14:20:59,077 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 14:20:59,077 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 14:20:59,078 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 14:20:59,078 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 14:20:59,078 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 14:20:59,078 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 14:20:59,079 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 14:20:59,079 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 14:20:59,079 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 14:20:59,079 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:20:59,079 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 14:20:59,080 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 14:20:59,080 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 -> NUM_FUNCTIONS
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
[2020-07-20 14:20:59,433 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 14:20:59,448 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 14:20:59,452 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 14:20:59,453 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 14:20:59,454 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 14:20:59,455 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c
[2020-07-20 14:20:59,526 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd0ee635/c4aaa94c062a476eb1651c75bca86641/FLAG5efcaed4a
[2020-07-20 14:20:59,975 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 14:20:59,975 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_2-1.c
[2020-07-20 14:20:59,982 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd0ee635/c4aaa94c062a476eb1651c75bca86641/FLAG5efcaed4a
[2020-07-20 14:21:00,338 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ccd0ee635/c4aaa94c062a476eb1651c75bca86641
[2020-07-20 14:21:00,350 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 14:21:00,354 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 14:21:00,359 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 14:21:00,360 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 14:21:00,364 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 14:21:00,365 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:21:00" (1/1) ...
[2020-07-20 14:21:00,369 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a926594 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00, skipping insertion in model container
[2020-07-20 14:21:00,369 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 02:21:00" (1/1) ...
[2020-07-20 14:21:00,379 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 14:21:00,402 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 14:21:00,595 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 14:21:00,600 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 14:21:00,617 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 14:21:00,633 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 14:21:00,633 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00 WrapperNode
[2020-07-20 14:21:00,634 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 14:21:00,635 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 14:21:00,635 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 14:21:00,635 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 14:21:00,650 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00" (1/1) ...
[2020-07-20 14:21:00,650 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00" (1/1) ...
[2020-07-20 14:21:00,656 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00" (1/1) ...
[2020-07-20 14:21:00,656 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00" (1/1) ...
[2020-07-20 14:21:00,747 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00" (1/1) ...
[2020-07-20 14:21:00,753 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00" (1/1) ...
[2020-07-20 14:21:00,760 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00" (1/1) ...
[2020-07-20 14:21:00,762 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 14:21:00,762 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 14:21:00,763 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 14:21:00,763 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 14:21:00,764 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 14:21:00,820 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 14:21:00,820 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 14:21:00,820 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 14:21:00,820 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 14:21:00,820 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 14:21:00,821 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 14:21:00,821 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 14:21:00,821 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 14:21:00,821 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 14:21:01,018 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 14:21:01,019 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 14:21:01,023 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:21:01 BoogieIcfgContainer
[2020-07-20 14:21:01,023 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 14:21:01,024 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 14:21:01,024 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 14:21:01,028 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 14:21:01,028 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 02:21:00" (1/3) ...
[2020-07-20 14:21:01,029 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79112314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:21:01, skipping insertion in model container
[2020-07-20 14:21:01,030 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 02:21:00" (2/3) ...
[2020-07-20 14:21:01,030 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79112314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 02:21:01, skipping insertion in model container
[2020-07-20 14:21:01,030 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 02:21:01" (3/3) ...
[2020-07-20 14:21:01,032 INFO  L109   eAbstractionObserver]: Analyzing ICFG underapprox_2-1.c
[2020-07-20 14:21:01,044 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 14:21:01,052 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 14:21:01,066 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 14:21:01,089 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 14:21:01,090 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 14:21:01,090 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 14:21:01,090 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 14:21:01,090 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 14:21:01,090 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 14:21:01,091 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 14:21:01,091 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 14:21:01,108 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states.
[2020-07-20 14:21:01,113 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-20 14:21:01,113 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:21:01,114 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:21:01,114 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:21:01,119 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:21:01,120 INFO  L82        PathProgramCache]: Analyzing trace with hash 1846144830, now seen corresponding path program 1 times
[2020-07-20 14:21:01,126 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:21:01,127 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128817784]
[2020-07-20 14:21:01,127 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
[2020-07-20 14:21:01,222 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 1 check-sat command(s)
[2020-07-20 14:21:01,222 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:21:01,224 INFO  L263         TraceCheckSpWp]: Trace formula consists of 11 conjuncts, 3 conjunts are in the unsatisfiable core
[2020-07-20 14:21:01,230 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:21:01,266 INFO  L134       CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 14:21:01,267 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 14:21:01,268 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128817784]
[2020-07-20 14:21:01,269 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 14:21:01,269 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 14:21:01,270 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327987856]
[2020-07-20 14:21:01,275 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 14:21:01,276 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:21:01,287 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 14:21:01,288 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 14:21:01,291 INFO  L87              Difference]: Start difference. First operand 17 states. Second operand 3 states.
[2020-07-20 14:21:01,333 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:21:01,338 INFO  L93              Difference]: Finished difference Result 29 states and 34 transitions.
[2020-07-20 14:21:01,339 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 14:21:01,340 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 10
[2020-07-20 14:21:01,341 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:21:01,350 INFO  L225             Difference]: With dead ends: 29
[2020-07-20 14:21:01,350 INFO  L226             Difference]: Without dead ends: 12
[2020-07-20 14:21:01,357 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 14:21:01,394 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 12 states.
[2020-07-20 14:21:01,418 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12.
[2020-07-20 14:21:01,420 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 12 states.
[2020-07-20 14:21:01,421 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions.
[2020-07-20 14:21:01,423 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10
[2020-07-20 14:21:01,424 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:21:01,424 INFO  L479      AbstractCegarLoop]: Abstraction has 12 states and 12 transitions.
[2020-07-20 14:21:01,424 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 14:21:01,424 INFO  L276                IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions.
[2020-07-20 14:21:01,425 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-07-20 14:21:01,425 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:21:01,426 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:21:01,641 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:21:01,641 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:21:01,642 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:21:01,643 INFO  L82        PathProgramCache]: Analyzing trace with hash 1432376145, now seen corresponding path program 1 times
[2020-07-20 14:21:01,643 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:21:01,644 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807453089]
[2020-07-20 14:21:01,644 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
[2020-07-20 14:21:01,670 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 14:21:01,670 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:21:01,672 INFO  L263         TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-20 14:21:01,674 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:21:01,696 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 14:21:01,696 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:21:01,748 INFO  L134       CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 14:21:01,749 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807453089]
[2020-07-20 14:21:01,749 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:21:01,749 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6
[2020-07-20 14:21:01,750 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558831482]
[2020-07-20 14:21:01,752 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 14:21:01,752 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:21:01,753 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 14:21:01,753 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30
[2020-07-20 14:21:01,753 INFO  L87              Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 6 states.
[2020-07-20 14:21:01,813 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:21:01,814 INFO  L93              Difference]: Finished difference Result 20 states and 22 transitions.
[2020-07-20 14:21:01,814 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. 
[2020-07-20 14:21:01,815 INFO  L78                 Accepts]: Start accepts. Automaton has 6 states. Word has length 11
[2020-07-20 14:21:01,815 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:21:01,816 INFO  L225             Difference]: With dead ends: 20
[2020-07-20 14:21:01,816 INFO  L226             Difference]: Without dead ends: 15
[2020-07-20 14:21:01,817 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42
[2020-07-20 14:21:01,818 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 15 states.
[2020-07-20 14:21:01,822 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15.
[2020-07-20 14:21:01,822 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 15 states.
[2020-07-20 14:21:01,823 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions.
[2020-07-20 14:21:01,823 INFO  L78                 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11
[2020-07-20 14:21:01,823 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:21:01,824 INFO  L479      AbstractCegarLoop]: Abstraction has 15 states and 15 transitions.
[2020-07-20 14:21:01,824 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 14:21:01,824 INFO  L276                IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions.
[2020-07-20 14:21:01,825 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-20 14:21:01,825 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:21:01,825 INFO  L422         BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:21:02,040 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:21:02,041 INFO  L427      AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:21:02,041 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:21:02,042 INFO  L82        PathProgramCache]: Analyzing trace with hash -1031021570, now seen corresponding path program 2 times
[2020-07-20 14:21:02,043 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:21:02,043 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679968502]
[2020-07-20 14:21:02,044 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
[2020-07-20 14:21:02,089 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 14:21:02,090 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 14:21:02,091 INFO  L263         TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-07-20 14:21:02,093 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 14:21:02,161 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 14:21:02,161 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 14:21:02,266 INFO  L134       CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 14:21:02,267 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679968502]
[2020-07-20 14:21:02,267 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 14:21:02,268 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12
[2020-07-20 14:21:02,268 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157321760]
[2020-07-20 14:21:02,269 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 14:21:02,269 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 14:21:02,269 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 14:21:02,270 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-07-20 14:21:02,270 INFO  L87              Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 12 states.
[2020-07-20 14:21:02,327 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 14:21:02,327 INFO  L93              Difference]: Finished difference Result 22 states and 23 transitions.
[2020-07-20 14:21:02,328 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. 
[2020-07-20 14:21:02,328 INFO  L78                 Accepts]: Start accepts. Automaton has 12 states. Word has length 14
[2020-07-20 14:21:02,328 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 14:21:02,329 INFO  L225             Difference]: With dead ends: 22
[2020-07-20 14:21:02,329 INFO  L226             Difference]: Without dead ends: 17
[2020-07-20 14:21:02,330 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132
[2020-07-20 14:21:02,331 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 17 states.
[2020-07-20 14:21:02,335 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17.
[2020-07-20 14:21:02,335 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 17 states.
[2020-07-20 14:21:02,336 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions.
[2020-07-20 14:21:02,336 INFO  L78                 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14
[2020-07-20 14:21:02,337 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 14:21:02,337 INFO  L479      AbstractCegarLoop]: Abstraction has 17 states and 17 transitions.
[2020-07-20 14:21:02,337 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 14:21:02,337 INFO  L276                IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions.
[2020-07-20 14:21:02,338 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 17
[2020-07-20 14:21:02,338 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 14:21:02,338 INFO  L422         BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 14:21:02,552 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:21:02,552 INFO  L427      AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 14:21:02,553 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 14:21:02,553 INFO  L82        PathProgramCache]: Analyzing trace with hash -1802490274, now seen corresponding path program 3 times
[2020-07-20 14:21:02,554 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 14:21:02,554 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496347938]
[2020-07-20 14:21:02,555 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
[2020-07-20 14:21:02,590 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 14:21:02,590 INFO  L229   tOrderPrioritization]: Conjunction of SSA is sat
[2020-07-20 14:21:02,590 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 14:21:02,601 INFO  L136    AnnotateAndAsserter]: Conjunction of SSA is sat
[2020-07-20 14:21:02,601 INFO  L221             TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.
[2020-07-20 14:21:02,617 INFO  L174   FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace
[2020-07-20 14:21:02,617 INFO  L520         BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 14:21:02,831 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 14:21:02,859 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 02:21:02 BoogieIcfgContainer
[2020-07-20 14:21:02,859 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 14:21:02,862 INFO  L168              Benchmark]: Toolchain (without parser) took 2508.75 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 105.3 MB in the beginning and 102.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 59.4 MB. Max. memory is 7.1 GB.
[2020-07-20 14:21:02,863 INFO  L168              Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 147.3 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
[2020-07-20 14:21:02,864 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 274.95 ms. Allocated memory is still 147.3 MB. Free memory was 104.9 MB in the beginning and 95.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
[2020-07-20 14:21:02,865 INFO  L168              Benchmark]: Boogie Preprocessor took 127.38 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 95.6 MB in the beginning and 182.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB.
[2020-07-20 14:21:02,866 INFO  L168              Benchmark]: RCFGBuilder took 260.69 ms. Allocated memory is still 203.4 MB. Free memory was 182.8 MB in the beginning and 171.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB.
[2020-07-20 14:21:02,867 INFO  L168              Benchmark]: TraceAbstraction took 1834.74 ms. Allocated memory is still 203.4 MB. Free memory was 170.4 MB in the beginning and 102.0 MB in the end (delta: 68.3 MB). Peak memory consumption was 68.3 MB. Max. memory is 7.1 GB.
[2020-07-20 14:21:02,871 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.24 ms. Allocated memory is still 147.3 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 274.95 ms. Allocated memory is still 147.3 MB. Free memory was 104.9 MB in the beginning and 95.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 127.38 ms. Allocated memory was 147.3 MB in the beginning and 203.4 MB in the end (delta: 56.1 MB). Free memory was 95.6 MB in the beginning and 182.8 MB in the end (delta: -87.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 260.69 ms. Allocated memory is still 203.4 MB. Free memory was 182.8 MB in the beginning and 171.0 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1834.74 ms. Allocated memory is still 203.4 MB. Free memory was 170.4 MB in the beginning and 102.0 MB in the end (delta: 68.3 MB). Peak memory consumption was 68.3 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: 
[L11]              unsigned int x = 0;
[L12]              unsigned int y = 1;
       VAL         [x=0, y=1]
[L14]  COND TRUE   x < 6
[L15]              x++
[L16]              y *= 2
       VAL         [x=1, y=2]
[L14]  COND TRUE   x < 6
[L15]              x++
[L16]              y *= 2
       VAL         [x=2, y=4]
[L14]  COND TRUE   x < 6
[L15]              x++
[L16]              y *= 2
       VAL         [x=3, y=8]
[L14]  COND TRUE   x < 6
[L15]              x++
[L16]              y *= 2
       VAL         [x=4, y=16]
[L14]  COND TRUE   x < 6
[L15]              x++
[L16]              y *= 2
       VAL         [x=5, y=32]
[L14]  COND TRUE   x < 6
[L15]              x++
[L16]              y *= 2
       VAL         [x=6, y=64]
[L14]  COND FALSE  !(x < 6)
       VAL         [x=6, y=64]
[L19]  CALL        __VERIFIER_assert(x != 6)
       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 4 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 6, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 0 SDslu, 94 SDs, 0 SdLazy, 57 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 51 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 55 ConstructedInterpolants, 0 QuantifiedInterpolants, 1271 SizeOfPredicates, 3 NumberOfNonLiveVariables, 65 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 0/22 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...