/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_VARIABLES --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-lit/gsv2008.i


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 17:56:32,769 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 17:56:32,772 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 17:56:32,786 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 17:56:32,787 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 17:56:32,788 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 17:56:32,790 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
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[2020-07-20 17:56:32,799 INFO  L184        SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 17:56:32,799 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 17:56:32,800 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 17:56:32,801 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 17:56:32,803 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 17:56:32,804 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 17:56:32,805 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 17:56:32,807 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 17:56:32,810 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 17:56:32,812 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 17:56:32,813 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 17:56:32,815 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 17:56:32,816 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 17:56:32,819 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 17:56:32,819 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 17:56:32,820 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
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[2020-07-20 17:56:32,821 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-07-20 17:56:32,823 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-20 17:56:32,827 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 17:56:32,827 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-20 17:56:32,829 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 17:56:32,831 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 17:56:32,832 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 17:56:32,857 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 17:56:32,857 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 17:56:32,859 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 17:56:32,859 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 17:56:32,860 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 17:56:32,860 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 17:56:32,860 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 17:56:32,860 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 17:56:32,861 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 17:56:32,861 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 17:56:32,861 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 17:56:32,861 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 17:56:32,861 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 17:56:32,862 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 17:56:32,862 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 17:56:32,862 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 17:56:32,864 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 17:56:32,864 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 17:56:32,865 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 17:56:32,865 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 17:56:32,865 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 17:56:32,865 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 17:56:32,866 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 17:56:32,866 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 17:56:32,866 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 17:56:32,866 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 17:56:32,867 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:56:32,867 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 17:56:32,867 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 17:56:32,867 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_VARIABLES
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 17:56:33,223 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 17:56:33,238 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 17:56:33,242 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 17:56:33,244 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 17:56:33,244 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 17:56:33,245 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gsv2008.i
[2020-07-20 17:56:33,345 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e515ad5/7c74720411164537bc3ef2cb0289fa30/FLAG0c6131e83
[2020-07-20 17:56:33,935 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 17:56:33,937 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gsv2008.i
[2020-07-20 17:56:33,947 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e515ad5/7c74720411164537bc3ef2cb0289fa30/FLAG0c6131e83
[2020-07-20 17:56:34,272 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72e515ad5/7c74720411164537bc3ef2cb0289fa30
[2020-07-20 17:56:34,287 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 17:56:34,291 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 17:56:34,292 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 17:56:34,292 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 17:56:34,297 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 17:56:34,300 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,304 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d02878e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34, skipping insertion in model container
[2020-07-20 17:56:34,304 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,316 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 17:56:34,344 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 17:56:34,561 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:56:34,567 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 17:56:34,588 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:56:34,607 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 17:56:34,608 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34 WrapperNode
[2020-07-20 17:56:34,608 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 17:56:34,609 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 17:56:34,609 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 17:56:34,609 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 17:56:34,626 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,627 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,632 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,633 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,636 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,641 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,642 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (1/1) ...
[2020-07-20 17:56:34,643 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 17:56:34,644 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 17:56:34,644 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 17:56:34,644 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 17:56:34,645 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (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 17:56:34,777 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 17:56:34,777 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 17:56:34,778 INFO  L138     BoogieDeclarations]: Found implementation of procedure assume_abort_if_not
[2020-07-20 17:56:34,778 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 17:56:34,778 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 17:56:34,778 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 17:56:34,778 INFO  L130     BoogieDeclarations]: Found specification of procedure abort
[2020-07-20 17:56:34,778 INFO  L130     BoogieDeclarations]: Found specification of procedure assume_abort_if_not
[2020-07-20 17:56:34,778 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 17:56:34,779 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 17:56:34,779 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 17:56:34,779 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 17:56:34,779 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 17:56:34,957 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 17:56:34,957 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 17:56:34,961 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:34 BoogieIcfgContainer
[2020-07-20 17:56:34,961 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 17:56:34,962 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 17:56:34,963 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 17:56:34,966 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 17:56:34,966 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:56:34" (1/3) ...
[2020-07-20 17:56:34,967 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7352ff74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:34, skipping insertion in model container
[2020-07-20 17:56:34,967 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:56:34" (2/3) ...
[2020-07-20 17:56:34,967 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7352ff74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:56:34, skipping insertion in model container
[2020-07-20 17:56:34,968 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:56:34" (3/3) ...
[2020-07-20 17:56:34,969 INFO  L109   eAbstractionObserver]: Analyzing ICFG gsv2008.i
[2020-07-20 17:56:34,980 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 17:56:34,987 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 17:56:35,010 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 17:56:35,063 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 17:56:35,063 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 17:56:35,063 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 17:56:35,065 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 17:56:35,066 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 17:56:35,066 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 17:56:35,067 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 17:56:35,067 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 17:56:35,097 INFO  L276                IsEmpty]: Start isEmpty. Operand 19 states.
[2020-07-20 17:56:35,108 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 12
[2020-07-20 17:56:35,110 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:56:35,112 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:56:35,112 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:56:35,123 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:56:35,124 INFO  L82        PathProgramCache]: Analyzing trace with hash 1608903343, now seen corresponding path program 1 times
[2020-07-20 17:56:35,141 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:56:35,142 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131471306]
[2020-07-20 17:56:35,143 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 17:56:35,260 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 17:56:35,261 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:56:35,264 INFO  L263         TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core
[2020-07-20 17:56:35,276 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:56:35,328 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 17:56:35,328 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:56:35,329 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131471306]
[2020-07-20 17:56:35,330 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:56:35,331 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3
[2020-07-20 17:56:35,332 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879993354]
[2020-07-20 17:56:35,338 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 3 states
[2020-07-20 17:56:35,338 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:56:35,352 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants.
[2020-07-20 17:56:35,353 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6
[2020-07-20 17:56:35,356 INFO  L87              Difference]: Start difference. First operand 19 states. Second operand 3 states.
[2020-07-20 17:56:35,399 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:56:35,399 INFO  L93              Difference]: Finished difference Result 34 states and 40 transitions.
[2020-07-20 17:56:35,400 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. 
[2020-07-20 17:56:35,402 INFO  L78                 Accepts]: Start accepts. Automaton has 3 states. Word has length 11
[2020-07-20 17:56:35,403 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:56:35,412 INFO  L225             Difference]: With dead ends: 34
[2020-07-20 17:56:35,413 INFO  L226             Difference]: Without dead ends: 13
[2020-07-20 17:56:35,417 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 17:56:35,439 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 13 states.
[2020-07-20 17:56:35,466 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13.
[2020-07-20 17:56:35,468 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 13 states.
[2020-07-20 17:56:35,470 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions.
[2020-07-20 17:56:35,473 INFO  L78                 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11
[2020-07-20 17:56:35,473 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:56:35,474 INFO  L479      AbstractCegarLoop]: Abstraction has 13 states and 13 transitions.
[2020-07-20 17:56:35,474 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 3 states.
[2020-07-20 17:56:35,474 INFO  L276                IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions.
[2020-07-20 17:56:35,476 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 13
[2020-07-20 17:56:35,478 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:56:35,478 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:56:35,694 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:56:35,695 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:56:35,696 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:56:35,696 INFO  L82        PathProgramCache]: Analyzing trace with hash -1628066164, now seen corresponding path program 1 times
[2020-07-20 17:56:35,697 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:56:35,697 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379546361]
[2020-07-20 17:56:35,698 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 17:56:35,733 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 17:56:35,734 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:56:35,735 INFO  L263         TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 17:56:35,737 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:56:35,793 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 17:56:35,839 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 17:56:35,840 INFO  L328         TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 17:56:35,883 INFO  L501       QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 17:56:35,961 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 17:56:35,962 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379546361]
[2020-07-20 17:56:35,962 INFO  L220   FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 17:56:35,963 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10
[2020-07-20 17:56:35,963 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56387831]
[2020-07-20 17:56:35,965 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-07-20 17:56:35,966 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:56:35,966 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-07-20 17:56:35,967 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90
[2020-07-20 17:56:35,967 INFO  L87              Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 10 states.
[2020-07-20 17:56:36,067 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:56:36,068 INFO  L93              Difference]: Finished difference Result 15 states and 16 transitions.
[2020-07-20 17:56:36,068 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. 
[2020-07-20 17:56:36,068 INFO  L78                 Accepts]: Start accepts. Automaton has 10 states. Word has length 12
[2020-07-20 17:56:36,069 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:56:36,069 INFO  L225             Difference]: With dead ends: 15
[2020-07-20 17:56:36,069 INFO  L226             Difference]: Without dead ends: 0
[2020-07-20 17:56:36,071 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132
[2020-07-20 17:56:36,072 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 17:56:36,072 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 17:56:36,072 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 17:56:36,073 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 17:56:36,073 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12
[2020-07-20 17:56:36,074 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:56:36,074 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 17:56:36,074 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-07-20 17:56:36,074 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 17:56:36,074 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 17:56:36,275 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:56:36,281 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 17:56:36,396 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-07-20 17:56:36,397 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 17:56:36,397 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 17:56:36,397 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-07-20 17:56:36,397 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-07-20 17:56:36,398 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-07-20 17:56:36,398 INFO  L268        CegarLoopResult]: For program point  assume_abort_if_notENTRY(lines 3 5)  no Hoare annotation was computed.
[2020-07-20 17:56:36,398 INFO  L268        CegarLoopResult]: For program point  L4(line 4)  no Hoare annotation was computed.
[2020-07-20 17:56:36,398 INFO  L268        CegarLoopResult]: For program point  L4-2(lines 3 5)  no Hoare annotation was computed.
[2020-07-20 17:56:36,398 INFO  L268        CegarLoopResult]: For program point  assume_abort_if_notEXIT(lines 3 5)  no Hoare annotation was computed.
[2020-07-20 17:56:36,399 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 13 24)  the Hoare annotation is:  true
[2020-07-20 17:56:36,399 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 13 24)  no Hoare annotation was computed.
[2020-07-20 17:56:36,399 INFO  L268        CegarLoopResult]: For program point  L22(line 22)  no Hoare annotation was computed.
[2020-07-20 17:56:36,399 INFO  L268        CegarLoopResult]: For program point  L17(line 17)  no Hoare annotation was computed.
[2020-07-20 17:56:36,399 INFO  L264        CegarLoopResult]: At program point  L18-2(lines 18 21)  the Hoare annotation is:  (or (< 0 main_~y~0) (< main_~x~0 0))
[2020-07-20 17:56:36,400 INFO  L264        CegarLoopResult]: At program point  L18-3(lines 18 21)  the Hoare annotation is:  (< 0 main_~y~0)
[2020-07-20 17:56:36,400 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 13 24)  no Hoare annotation was computed.
[2020-07-20 17:56:36,400 INFO  L271        CegarLoopResult]: At program point  __VERIFIER_assertENTRY(lines 6 11)  the Hoare annotation is:  true
[2020-07-20 17:56:36,400 INFO  L268        CegarLoopResult]: For program point  __VERIFIER_assertEXIT(lines 6 11)  no Hoare annotation was computed.
[2020-07-20 17:56:36,400 INFO  L268        CegarLoopResult]: For program point  L8(line 8)  no Hoare annotation was computed.
[2020-07-20 17:56:36,401 INFO  L268        CegarLoopResult]: For program point  L7(lines 7 9)  no Hoare annotation was computed.
[2020-07-20 17:56:36,401 INFO  L268        CegarLoopResult]: For program point  L7-2(lines 6 11)  no Hoare annotation was computed.
[2020-07-20 17:56:36,401 INFO  L268        CegarLoopResult]: For program point  __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8)  no Hoare annotation was computed.
[2020-07-20 17:56:36,425 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:56:36 BoogieIcfgContainer
[2020-07-20 17:56:36,425 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 17:56:36,429 INFO  L168              Benchmark]: Toolchain (without parser) took 2138.92 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 102.6 MB in the beginning and 112.0 MB in the end (delta: -9.4 MB). Peak memory consumption was 53.5 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,431 INFO  L168              Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,432 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 316.68 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,433 INFO  L168              Benchmark]: Boogie Preprocessor took 34.58 ms. Allocated memory is still 137.4 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,434 INFO  L168              Benchmark]: RCFGBuilder took 317.33 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 167.6 MB in the end (delta: -76.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,435 INFO  L168              Benchmark]: TraceAbstraction took 1463.04 ms. Allocated memory is still 200.3 MB. Free memory was 166.9 MB in the beginning and 112.0 MB in the end (delta: 54.9 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB.
[2020-07-20 17:56:36,440 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 137.4 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 316.68 ms. Allocated memory is still 137.4 MB. Free memory was 102.4 MB in the beginning and 93.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 34.58 ms. Allocated memory is still 137.4 MB. Free memory was 93.0 MB in the beginning and 91.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 317.33 ms. Allocated memory was 137.4 MB in the beginning and 200.3 MB in the end (delta: 62.9 MB). Free memory was 91.4 MB in the beginning and 167.6 MB in the end (delta: -76.2 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1463.04 ms. Allocated memory is still 200.3 MB. Free memory was 166.9 MB in the beginning and 112.0 MB in the end (delta: 54.9 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable
    For all program executions holds that call of __VERIFIER_error() unreachable at this location
  - AllSpecificationsHoldResult: All specifications hold
    1 specifications checked. All of them hold
  - InvariantResult [Line: 18]: Loop Invariant
    Derived loop invariant: 0 < y || x < 0
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 6 SDslu, 43 SDs, 0 SdLazy, 32 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 13 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 20 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 23 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 796 SizeOfPredicates, 5 NumberOfNonLiveVariables, 58 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 3 InterpolantComputations, 1 PerfectInterpolantSequences, 0/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...