/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/loops/trex03-2.c


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


This is Ultimate 0.1.25-d623d84
[2020-07-20 17:43:09,826 INFO  L177        SettingsManager]: Resetting all preferences to default values...
[2020-07-20 17:43:09,828 INFO  L181        SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 17:43:09,840 INFO  L184        SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 17:43:09,841 INFO  L181        SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 17:43:09,842 INFO  L181        SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 17:43:09,843 INFO  L181        SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 17:43:09,845 INFO  L181        SettingsManager]: Resetting LassoRanker preferences to default values
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[2020-07-20 17:43:09,848 INFO  L181        SettingsManager]: Resetting SyntaxChecker preferences to default values
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[2020-07-20 17:43:09,850 INFO  L181        SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 17:43:09,851 INFO  L181        SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 17:43:09,852 INFO  L181        SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 17:43:09,853 INFO  L181        SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 17:43:09,854 INFO  L181        SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 17:43:09,855 INFO  L181        SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 17:43:09,857 INFO  L181        SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 17:43:09,860 INFO  L181        SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 17:43:09,862 INFO  L181        SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 17:43:09,863 INFO  L181        SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 17:43:09,864 INFO  L181        SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 17:43:09,865 INFO  L181        SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 17:43:09,868 INFO  L184        SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 17:43:09,868 INFO  L184        SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 17:43:09,868 INFO  L181        SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 17:43:09,869 INFO  L181        SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 17:43:09,870 INFO  L181        SettingsManager]: Resetting IcfgTransformer preferences to default values
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[2020-07-20 17:43:09,871 INFO  L181        SettingsManager]: Resetting Boogie Printer preferences to default values
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[2020-07-20 17:43:09,875 INFO  L184        SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 17:43:09,875 INFO  L181        SettingsManager]: Resetting CDTParser preferences to default values
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[2020-07-20 17:43:09,876 INFO  L181        SettingsManager]: Resetting SmtParser preferences to default values
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[2020-07-20 17:43:09,878 INFO  L188        SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 17:43:09,879 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 17:43:09,894 INFO  L113        SettingsManager]: Loading preferences was successful
[2020-07-20 17:43:09,895 INFO  L115        SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 17:43:09,896 INFO  L136        SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 17:43:09,896 INFO  L138        SettingsManager]:  * Create parallel compositions if possible=false
[2020-07-20 17:43:09,896 INFO  L138        SettingsManager]:  * Use SBE=true
[2020-07-20 17:43:09,897 INFO  L136        SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 17:43:09,897 INFO  L138        SettingsManager]:  * sizeof long=4
[2020-07-20 17:43:09,897 INFO  L138        SettingsManager]:  * Overapproximate operations on floating types=true
[2020-07-20 17:43:09,897 INFO  L138        SettingsManager]:  * sizeof POINTER=4
[2020-07-20 17:43:09,897 INFO  L138        SettingsManager]:  * Check division by zero=IGNORE
[2020-07-20 17:43:09,898 INFO  L138        SettingsManager]:  * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 17:43:09,898 INFO  L138        SettingsManager]:  * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 17:43:09,898 INFO  L138        SettingsManager]:  * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 17:43:09,898 INFO  L138        SettingsManager]:  * sizeof long double=12
[2020-07-20 17:43:09,898 INFO  L138        SettingsManager]:  * Check if freed pointer was valid=false
[2020-07-20 17:43:09,899 INFO  L138        SettingsManager]:  * Use constant arrays=true
[2020-07-20 17:43:09,899 INFO  L138        SettingsManager]:  * Pointer base address is valid at dereference=IGNORE
[2020-07-20 17:43:09,899 INFO  L136        SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 17:43:09,899 INFO  L138        SettingsManager]:  * Size of a code block=SequenceOfStatements
[2020-07-20 17:43:09,900 INFO  L138        SettingsManager]:  * To the following directory=./dump/
[2020-07-20 17:43:09,900 INFO  L138        SettingsManager]:  * SMT solver=External_DefaultMode
[2020-07-20 17:43:09,900 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 17:43:09,900 INFO  L136        SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 17:43:09,900 INFO  L138        SettingsManager]:  * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 17:43:09,901 INFO  L138        SettingsManager]:  * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 17:43:09,901 INFO  L138        SettingsManager]:  * Trace refinement strategy=CAMEL
[2020-07-20 17:43:09,901 INFO  L138        SettingsManager]:  * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:43:09,901 INFO  L138        SettingsManager]:  * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 17:43:09,901 INFO  L138        SettingsManager]:  * Trace refinement exception blacklist=NONE
[2020-07-20 17:43:09,902 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 17:43:10,194 INFO  L81    nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 17:43:10,218 INFO  L258   ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 17:43:10,223 INFO  L214   ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 17:43:10,224 INFO  L271        PluginConnector]: Initializing CDTParser...
[2020-07-20 17:43:10,225 INFO  L275        PluginConnector]: CDTParser initialized
[2020-07-20 17:43:10,226 INFO  L429   ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex03-2.c
[2020-07-20 17:43:10,310 INFO  L220              CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b3d6ee9/423e1fedb8cd414394eb62a19b751c05/FLAG296fb58f2
[2020-07-20 17:43:10,839 INFO  L306              CDTParser]: Found 1 translation units.
[2020-07-20 17:43:10,840 INFO  L160              CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex03-2.c
[2020-07-20 17:43:10,849 INFO  L349              CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b3d6ee9/423e1fedb8cd414394eb62a19b751c05/FLAG296fb58f2
[2020-07-20 17:43:11,193 INFO  L357              CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28b3d6ee9/423e1fedb8cd414394eb62a19b751c05
[2020-07-20 17:43:11,204 INFO  L296   ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 17:43:11,208 INFO  L131        ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 17:43:11,209 INFO  L113        PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 17:43:11,209 INFO  L271        PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 17:43:11,213 INFO  L275        PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 17:43:11,214 INFO  L185        PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:43:11" (1/1) ...
[2020-07-20 17:43:11,217 INFO  L205        PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f6bf434 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11, skipping insertion in model container
[2020-07-20 17:43:11,218 INFO  L185        PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:43:11" (1/1) ...
[2020-07-20 17:43:11,226 INFO  L145         MainTranslator]: Starting translation in SV-COMP mode 
[2020-07-20 17:43:11,249 INFO  L178         MainTranslator]: Built tables and reachable declarations
[2020-07-20 17:43:11,429 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:43:11,434 INFO  L203         MainTranslator]: Completed pre-run
[2020-07-20 17:43:11,452 INFO  L206          PostProcessor]: Analyzing one entry point: main
[2020-07-20 17:43:11,466 INFO  L208         MainTranslator]: Completed translation
[2020-07-20 17:43:11,466 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11 WrapperNode
[2020-07-20 17:43:11,466 INFO  L132        PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 17:43:11,467 INFO  L113        PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 17:43:11,467 INFO  L271        PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 17:43:11,467 INFO  L275        PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 17:43:11,478 INFO  L185        PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ...
[2020-07-20 17:43:11,478 INFO  L185        PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ...
[2020-07-20 17:43:11,483 INFO  L185        PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ...
[2020-07-20 17:43:11,483 INFO  L185        PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ...
[2020-07-20 17:43:11,573 INFO  L185        PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ...
[2020-07-20 17:43:11,585 INFO  L185        PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ...
[2020-07-20 17:43:11,586 INFO  L185        PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (1/1) ...
[2020-07-20 17:43:11,593 INFO  L132        PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 17:43:11,595 INFO  L113        PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 17:43:11,595 INFO  L271        PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 17:43:11,596 INFO  L275        PluginConnector]: RCFGBuilder initialized
[2020-07-20 17:43:11,600 INFO  L185        PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (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 17:43:11,672 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 17:43:11,673 INFO  L138     BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 17:43:11,673 INFO  L138     BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert
[2020-07-20 17:43:11,674 INFO  L138     BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 17:43:11,674 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 17:43:11,674 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_assert
[2020-07-20 17:43:11,675 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint
[2020-07-20 17:43:11,675 INFO  L130     BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool
[2020-07-20 17:43:11,675 INFO  L130     BoogieDeclarations]: Found specification of procedure main
[2020-07-20 17:43:11,675 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 17:43:11,676 INFO  L130     BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 17:43:11,879 INFO  L290             CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 17:43:11,880 INFO  L295             CfgBuilder]: Removed 1 assume(true) statements.
[2020-07-20 17:43:11,883 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:43:11 BoogieIcfgContainer
[2020-07-20 17:43:11,883 INFO  L132        PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 17:43:11,885 INFO  L113        PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 17:43:11,885 INFO  L271        PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 17:43:11,888 INFO  L275        PluginConnector]: TraceAbstraction initialized
[2020-07-20 17:43:11,889 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:43:11" (1/3) ...
[2020-07-20 17:43:11,889 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6e3dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:43:11, skipping insertion in model container
[2020-07-20 17:43:11,890 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:43:11" (2/3) ...
[2020-07-20 17:43:11,890 INFO  L205        PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6e3dc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:43:11, skipping insertion in model container
[2020-07-20 17:43:11,890 INFO  L185        PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:43:11" (3/3) ...
[2020-07-20 17:43:11,892 INFO  L109   eAbstractionObserver]: Analyzing ICFG trex03-2.c
[2020-07-20 17:43:11,904 INFO  L157   ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 17:43:11,911 INFO  L169   ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 17:43:11,926 INFO  L251      AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 17:43:11,950 INFO  L375      AbstractCegarLoop]: Interprodecural is true
[2020-07-20 17:43:11,950 INFO  L376      AbstractCegarLoop]: Hoare is true
[2020-07-20 17:43:11,950 INFO  L377      AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 17:43:11,951 INFO  L378      AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 17:43:11,951 INFO  L379      AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 17:43:11,951 INFO  L380      AbstractCegarLoop]: Difference is false
[2020-07-20 17:43:11,951 INFO  L381      AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 17:43:11,951 INFO  L385      AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 17:43:11,968 INFO  L276                IsEmpty]: Start isEmpty. Operand 21 states.
[2020-07-20 17:43:11,974 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-20 17:43:11,974 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:43:11,975 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:43:11,975 INFO  L427      AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:43:11,980 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:43:11,981 INFO  L82        PathProgramCache]: Analyzing trace with hash -859010367, now seen corresponding path program 1 times
[2020-07-20 17:43:11,988 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:43:11,988 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760878761]
[2020-07-20 17:43:11,989 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 17:43:12,079 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 17:43:12,080 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:43:12,083 INFO  L263         TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core
[2020-07-20 17:43:12,089 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:43:12,120 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 17:43:12,120 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:43:12,121 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760878761]
[2020-07-20 17:43:12,122 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:43:12,123 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2
[2020-07-20 17:43:12,124 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723281091]
[2020-07-20 17:43:12,130 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 2 states
[2020-07-20 17:43:12,131 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:43:12,148 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants.
[2020-07-20 17:43:12,149 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 17:43:12,153 INFO  L87              Difference]: Start difference. First operand 21 states. Second operand 2 states.
[2020-07-20 17:43:12,177 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:43:12,178 INFO  L93              Difference]: Finished difference Result 33 states and 38 transitions.
[2020-07-20 17:43:12,178 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. 
[2020-07-20 17:43:12,180 INFO  L78                 Accepts]: Start accepts. Automaton has 2 states. Word has length 10
[2020-07-20 17:43:12,180 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:43:12,189 INFO  L225             Difference]: With dead ends: 33
[2020-07-20 17:43:12,189 INFO  L226             Difference]: Without dead ends: 14
[2020-07-20 17:43:12,193 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2
[2020-07-20 17:43:12,211 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 14 states.
[2020-07-20 17:43:12,230 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14.
[2020-07-20 17:43:12,231 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 14 states.
[2020-07-20 17:43:12,232 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions.
[2020-07-20 17:43:12,234 INFO  L78                 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10
[2020-07-20 17:43:12,235 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:43:12,235 INFO  L479      AbstractCegarLoop]: Abstraction has 14 states and 16 transitions.
[2020-07-20 17:43:12,235 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 2 states.
[2020-07-20 17:43:12,235 INFO  L276                IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions.
[2020-07-20 17:43:12,236 INFO  L282                IsEmpty]: Finished isEmpty. Found accepting run of length 11
[2020-07-20 17:43:12,236 INFO  L414         BasicCegarLoop]: Found error trace
[2020-07-20 17:43:12,236 INFO  L422         BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 17:43:12,450 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:43:12,450 INFO  L427      AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 17:43:12,451 INFO  L144       PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 17:43:12,451 INFO  L82        PathProgramCache]: Analyzing trace with hash -873786703, now seen corresponding path program 1 times
[2020-07-20 17:43:12,452 INFO  L163   FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 17:43:12,453 INFO  L354   FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756620888]
[2020-07-20 17:43:12,453 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 17:43:12,495 INFO  L228   tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 17:43:12,496 INFO  L229   tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 17:43:12,497 INFO  L263         TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 17:43:12,503 INFO  L286         TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 17:43:12,555 INFO  L501       QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts
[2020-07-20 17:43:12,568 INFO  L501       QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts
[2020-07-20 17:43:12,577 INFO  L501       QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts
[2020-07-20 17:43:12,585 INFO  L501       QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts
[2020-07-20 17:43:12,671 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 17:43:12,671 INFO  L324         TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 17:43:12,671 INFO  L354   FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756620888]
[2020-07-20 17:43:12,672 INFO  L220   FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 17:43:12,672 INFO  L233   FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 17:43:12,672 INFO  L156   tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190320429]
[2020-07-20 17:43:12,674 INFO  L459      AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 17:43:12,675 INFO  L143   FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 17:43:12,675 INFO  L142   InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 17:43:12,676 INFO  L144   InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 17:43:12,676 INFO  L87              Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states.
[2020-07-20 17:43:12,717 INFO  L144             Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 17:43:12,717 INFO  L93              Difference]: Finished difference Result 14 states and 16 transitions.
[2020-07-20 17:43:12,718 INFO  L141   InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. 
[2020-07-20 17:43:12,718 INFO  L78                 Accepts]: Start accepts. Automaton has 5 states. Word has length 10
[2020-07-20 17:43:12,718 INFO  L84                 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 17:43:12,719 INFO  L225             Difference]: With dead ends: 14
[2020-07-20 17:43:12,719 INFO  L226             Difference]: Without dead ends: 0
[2020-07-20 17:43:12,720 INFO  L675         BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30
[2020-07-20 17:43:12,721 INFO  L82        GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 17:43:12,721 INFO  L88        GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 17:43:12,721 INFO  L82        GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 17:43:12,721 INFO  L88        GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 17:43:12,722 INFO  L78                 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 10
[2020-07-20 17:43:12,722 INFO  L84                 Accepts]: Finished accepts. word is rejected.
[2020-07-20 17:43:12,722 INFO  L479      AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 17:43:12,722 INFO  L480      AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 17:43:12,722 INFO  L276                IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 17:43:12,723 INFO  L282                IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 17:43:12,928 WARN  L516      AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 17:43:12,933 INFO  L343    DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 17:43:13,006 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.initFINAL(line -1)  the Hoare annotation is:  true
[2020-07-20 17:43:13,006 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.initEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 17:43:13,006 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startEXIT(line -1)  no Hoare annotation was computed.
[2020-07-20 17:43:13,006 INFO  L271        CegarLoopResult]: At program point  L-1(line -1)  the Hoare annotation is:  true
[2020-07-20 17:43:13,006 INFO  L271        CegarLoopResult]: At program point  ULTIMATE.startENTRY(line -1)  the Hoare annotation is:  true
[2020-07-20 17:43:13,007 INFO  L268        CegarLoopResult]: For program point  ULTIMATE.startFINAL(line -1)  no Hoare annotation was computed.
[2020-07-20 17:43:13,007 INFO  L268        CegarLoopResult]: For program point  L27(line 27)  no Hoare annotation was computed.
[2020-07-20 17:43:13,007 INFO  L268        CegarLoopResult]: For program point  mainEXIT(lines 12 29)  no Hoare annotation was computed.
[2020-07-20 17:43:13,007 INFO  L268        CegarLoopResult]: For program point  L21(lines 21 22)  no Hoare annotation was computed.
[2020-07-20 17:43:13,007 INFO  L268        CegarLoopResult]: For program point  L21-2(lines 20 22)  no Hoare annotation was computed.
[2020-07-20 17:43:13,007 INFO  L268        CegarLoopResult]: For program point  mainFINAL(lines 12 29)  no Hoare annotation was computed.
[2020-07-20 17:43:13,008 INFO  L271        CegarLoopResult]: At program point  mainENTRY(lines 12 29)  the Hoare annotation is:  true
[2020-07-20 17:43:13,008 INFO  L268        CegarLoopResult]: For program point  L20(lines 20 22)  no Hoare annotation was computed.
[2020-07-20 17:43:13,008 INFO  L271        CegarLoopResult]: At program point  L18-2(lines 18 25)  the Hoare annotation is:  true
[2020-07-20 17:43:13,010 INFO  L264        CegarLoopResult]: At program point  L18-3(lines 18 25)  the Hoare annotation is:  (or (<= (mod main_~x1~0 4294967296) 0) (<= (mod main_~x2~0 4294967296) 0) (<= (mod main_~x3~0 4294967296) 0))
[2020-07-20 17:43:13,010 INFO  L271        CegarLoopResult]: At program point  __VERIFIER_assertENTRY(lines 3 8)  the Hoare annotation is:  true
[2020-07-20 17:43:13,010 INFO  L268        CegarLoopResult]: For program point  __VERIFIER_assertEXIT(lines 3 8)  no Hoare annotation was computed.
[2020-07-20 17:43:13,017 INFO  L268        CegarLoopResult]: For program point  L5(line 5)  no Hoare annotation was computed.
[2020-07-20 17:43:13,017 INFO  L268        CegarLoopResult]: For program point  L4(lines 4 6)  no Hoare annotation was computed.
[2020-07-20 17:43:13,017 INFO  L268        CegarLoopResult]: For program point  __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5)  no Hoare annotation was computed.
[2020-07-20 17:43:13,017 INFO  L268        CegarLoopResult]: For program point  L4-2(lines 3 8)  no Hoare annotation was computed.
[2020-07-20 17:43:13,035 INFO  L202        PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:43:13 BoogieIcfgContainer
[2020-07-20 17:43:13,035 INFO  L132        PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 17:43:13,040 INFO  L168              Benchmark]: Toolchain (without parser) took 1831.59 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 101.6 MB in the beginning and 121.9 MB in the end (delta: -20.2 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB.
[2020-07-20 17:43:13,041 INFO  L168              Benchmark]: CDTParser took 0.61 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
[2020-07-20 17:43:13,044 INFO  L168              Benchmark]: CACSL2BoogieTranslator took 257.80 ms. Allocated memory is still 136.8 MB. Free memory was 101.2 MB in the beginning and 91.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
[2020-07-20 17:43:13,046 INFO  L168              Benchmark]: Boogie Preprocessor took 125.95 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 179.5 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB.
[2020-07-20 17:43:13,047 INFO  L168              Benchmark]: RCFGBuilder took 288.30 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
[2020-07-20 17:43:13,049 INFO  L168              Benchmark]: TraceAbstraction took 1150.76 ms. Allocated memory is still 200.8 MB. Free memory was 166.4 MB in the beginning and 121.9 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB.
[2020-07-20 17:43:13,060 INFO  L336   ainManager$Toolchain]: #######################  End [Toolchain 1] #######################
 --- Results ---
 * Results from de.uni_freiburg.informatik.ultimate.core:
  - StatisticsResult: Toolchain Benchmarks
    Benchmark results are:
 * CDTParser took 0.61 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB.
 * CACSL2BoogieTranslator took 257.80 ms. Allocated memory is still 136.8 MB. Free memory was 101.2 MB in the beginning and 91.6 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB.
 * Boogie Preprocessor took 125.95 ms. Allocated memory was 136.8 MB in the beginning and 200.8 MB in the end (delta: 64.0 MB). Free memory was 91.6 MB in the beginning and 179.5 MB in the end (delta: -87.9 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB.
 * RCFGBuilder took 288.30 ms. Allocated memory is still 200.8 MB. Free memory was 179.5 MB in the beginning and 167.1 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB.
 * TraceAbstraction took 1150.76 ms. Allocated memory is still 200.8 MB. Free memory was 166.4 MB in the beginning and 121.9 MB in the end (delta: 44.6 MB). Peak memory consumption was 44.6 MB. Max. memory is 7.1 GB.
 * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
  - PositiveResult [Line: 5]: 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: 1
  - StatisticsResult: Ultimate Automizer benchmark data
    CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 1 SDslu, 32 SDs, 0 SdLazy, 7 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred 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, 8 PreInvPairs, 9 NumberOfFragments, 22 HoareAnnotationTreeSize, 8 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 20 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 333 SizeOfPredicates, 2 NumberOfNonLiveVariables, 70 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available
RESULT: Ultimate proved your program to be correct!
Received shutdown request...