/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 DAGSIZE --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/recursive-simple/sum_2x3-2.c
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This is Ultimate 0.1.25-d623d84
[2020-07-20 21:45:55,475 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 21:45:55,479 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 21:45:55,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 21:45:55,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 21:45:55,510 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 21:45:55,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 21:45:55,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 21:45:55,519 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 21:45:55,520 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 21:45:55,521 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 21:45:55,523 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 21:45:55,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 21:45:55,525 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 21:45:55,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 21:45:55,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 21:45:55,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 21:45:55,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 21:45:55,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 21:45:55,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 21:45:55,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 21:45:55,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 21:45:55,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 21:45:55,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 21:45:55,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 21:45:55,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 21:45:55,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 21:45:55,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 21:45:55,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 21:45:55,553 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 21:45:55,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 21:45:55,554 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 21:45:55,556 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 21:45:55,557 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 21:45:55,558 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 21:45:55,559 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 21:45:55,560 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 21:45:55,560 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 21:45:55,560 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 21:45:55,562 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 21:45:55,563 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 21:45:55,564 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 21:45:55,583 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 21:45:55,584 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 21:45:55,588 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 21:45:55,588 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 21:45:55,588 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 21:45:55,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 21:45:55,589 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 21:45:55,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 21:45:55,589 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 21:45:55,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 21:45:55,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 21:45:55,590 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 21:45:55,590 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 21:45:55,591 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 21:45:55,591 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 21:45:55,591 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 21:45:55,591 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 21:45:55,592 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 21:45:55,592 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 21:45:55,592 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 21:45:55,592 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 21:45:55,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 21:45:55,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 21:45:55,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 21:45:55,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 21:45:55,593 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 21:45:55,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:45:55,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 21:45:55,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 21:45:55,594 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 -> DAGSIZE
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 21:45:55,967 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 21:45:55,988 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 21:45:55,993 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 21:45:55,996 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 21:45:55,997 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 21:45:55,998 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_2x3-2.c
[2020-07-20 21:45:56,103 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4560271c5/01ed0901f592443baf2f974b5aa2156b/FLAGf3ed3d690
[2020-07-20 21:45:56,759 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 21:45:56,760 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_2x3-2.c
[2020-07-20 21:45:56,769 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4560271c5/01ed0901f592443baf2f974b5aa2156b/FLAGf3ed3d690
[2020-07-20 21:45:57,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4560271c5/01ed0901f592443baf2f974b5aa2156b
[2020-07-20 21:45:57,064 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 21:45:57,069 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 21:45:57,074 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 21:45:57,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 21:45:57,080 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 21:45:57,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:45:57" (1/1) ...
[2020-07-20 21:45:57,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5402bd52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57, skipping insertion in model container
[2020-07-20 21:45:57,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:45:57" (1/1) ...
[2020-07-20 21:45:57,104 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 21:45:57,132 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 21:45:57,425 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:45:57,434 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 21:45:57,456 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:45:57,480 INFO L208 MainTranslator]: Completed translation
[2020-07-20 21:45:57,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57 WrapperNode
[2020-07-20 21:45:57,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 21:45:57,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 21:45:57,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 21:45:57,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 21:45:57,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57" (1/1) ...
[2020-07-20 21:45:57,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57" (1/1) ...
[2020-07-20 21:45:57,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57" (1/1) ...
[2020-07-20 21:45:57,513 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57" (1/1) ...
[2020-07-20 21:45:57,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57" (1/1) ...
[2020-07-20 21:45:57,522 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57" (1/1) ...
[2020-07-20 21:45:57,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57" (1/1) ...
[2020-07-20 21:45:57,526 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 21:45:57,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 21:45:57,527 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 21:45:57,527 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 21:45:57,529 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57" (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 21:45:57,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 21:45:57,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 21:45:57,736 INFO L138 BoogieDeclarations]: Found implementation of procedure sum
[2020-07-20 21:45:57,737 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 21:45:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 21:45:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure sum
[2020-07-20 21:45:57,737 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 21:45:57,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 21:45:57,738 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 21:45:57,990 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 21:45:57,990 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 21:45:57,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:45:57 BoogieIcfgContainer
[2020-07-20 21:45:57,998 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 21:45:58,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 21:45:58,014 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 21:45:58,031 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 21:45:58,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:45:57" (1/3) ...
[2020-07-20 21:45:58,040 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2a364a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:45:58, skipping insertion in model container
[2020-07-20 21:45:58,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:45:57" (2/3) ...
[2020-07-20 21:45:58,047 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c2a364a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:45:58, skipping insertion in model container
[2020-07-20 21:45:58,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:45:57" (3/3) ...
[2020-07-20 21:45:58,056 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_2x3-2.c
[2020-07-20 21:45:58,104 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 21:45:58,120 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 21:45:58,146 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 21:45:58,216 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 21:45:58,217 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 21:45:58,217 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 21:45:58,217 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 21:45:58,218 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 21:45:58,218 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 21:45:58,218 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 21:45:58,218 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 21:45:58,246 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states.
[2020-07-20 21:45:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14
[2020-07-20 21:45:58,258 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:45:58,260 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:45:58,261 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:45:58,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:45:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times
[2020-07-20 21:45:58,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:45:58,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961909439]
[2020-07-20 21:45:58,285 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 21:45:58,383 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:45:58,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:45:58,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 4 conjunts are in the unsatisfiable core
[2020-07-20 21:45:58,396 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:45:58,516 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 21:45:58,517 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:45:58,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961909439]
[2020-07-20 21:45:58,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:45:58,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5
[2020-07-20 21:45:58,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411706131]
[2020-07-20 21:45:58,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states
[2020-07-20 21:45:58,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:45:58,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants.
[2020-07-20 21:45:58,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20
[2020-07-20 21:45:58,551 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states.
[2020-07-20 21:45:58,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:45:58,694 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions.
[2020-07-20 21:45:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states.
[2020-07-20 21:45:58,698 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13
[2020-07-20 21:45:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:45:58,714 INFO L225 Difference]: With dead ends: 30
[2020-07-20 21:45:58,715 INFO L226 Difference]: Without dead ends: 18
[2020-07-20 21:45:58,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 21:45:58,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states.
[2020-07-20 21:45:58,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18.
[2020-07-20 21:45:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states.
[2020-07-20 21:45:58,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions.
[2020-07-20 21:45:58,797 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13
[2020-07-20 21:45:58,798 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:45:58,798 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions.
[2020-07-20 21:45:58,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states.
[2020-07-20 21:45:58,799 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions.
[2020-07-20 21:45:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20
[2020-07-20 21:45:58,802 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:45:58,802 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:45:59,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:45:59,017 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:45:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:45:59,019 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times
[2020-07-20 21:45:59,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:45:59,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27722928]
[2020-07-20 21:45:59,020 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 21:45:59,061 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:45:59,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:45:59,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 6 conjunts are in the unsatisfiable core
[2020-07-20 21:45:59,070 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:45:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-20 21:45:59,156 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:45:59,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:45:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 21:45:59,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27722928]
[2020-07-20 21:45:59,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 21:45:59,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8
[2020-07-20 21:45:59,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634268230]
[2020-07-20 21:45:59,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states
[2020-07-20 21:45:59,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:45:59,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants.
[2020-07-20 21:45:59,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56
[2020-07-20 21:45:59,491 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states.
[2020-07-20 21:45:59,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:45:59,606 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions.
[2020-07-20 21:45:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-07-20 21:45:59,608 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19
[2020-07-20 21:45:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:45:59,610 INFO L225 Difference]: With dead ends: 25
[2020-07-20 21:45:59,611 INFO L226 Difference]: Without dead ends: 21
[2020-07-20 21:45:59,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90
[2020-07-20 21:45:59,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states.
[2020-07-20 21:45:59,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21.
[2020-07-20 21:45:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states.
[2020-07-20 21:45:59,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions.
[2020-07-20 21:45:59,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19
[2020-07-20 21:45:59,623 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:45:59,623 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions.
[2020-07-20 21:45:59,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states.
[2020-07-20 21:45:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions.
[2020-07-20 21:45:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26
[2020-07-20 21:45:59,626 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:45:59,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:45:59,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:45:59,843 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:45:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:45:59,847 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times
[2020-07-20 21:45:59,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:45:59,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281186750]
[2020-07-20 21:45:59,849 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 21:45:59,913 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:45:59,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:45:59,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 33 conjunts are in the unsatisfiable core
[2020-07-20 21:45:59,919 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:46:00,263 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-07-20 21:46:00,264 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:46:00,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 21:46:00,905 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 21:46:00,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 21:46:00,970 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:46:00,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 21:46:00,977 INFO L501 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts
[2020-07-20 21:46:00,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:46:00,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 21:46:00,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 21:46:00,989 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:46:01,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts
[2020-07-20 21:46:01,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:46:01,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked.
[2020-07-20 21:46:01,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281186750]
[2020-07-20 21:46:01,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 21:46:01,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18
[2020-07-20 21:46:01,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274321921]
[2020-07-20 21:46:01,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-07-20 21:46:01,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:46:01,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-07-20 21:46:01,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306
[2020-07-20 21:46:01,119 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 18 states.
[2020-07-20 21:46:01,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:46:01,545 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions.
[2020-07-20 21:46:01,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-07-20 21:46:01,545 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25
[2020-07-20 21:46:01,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:46:01,547 INFO L225 Difference]: With dead ends: 28
[2020-07-20 21:46:01,548 INFO L226 Difference]: Without dead ends: 24
[2020-07-20 21:46:01,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552
[2020-07-20 21:46:01,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-07-20 21:46:01,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2020-07-20 21:46:01,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-07-20 21:46:01,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions.
[2020-07-20 21:46:01,559 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25
[2020-07-20 21:46:01,559 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:46:01,559 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions.
[2020-07-20 21:46:01,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-07-20 21:46:01,559 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions.
[2020-07-20 21:46:01,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32
[2020-07-20 21:46:01,561 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:46:01,561 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:46:01,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:46:01,777 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:46:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:46:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times
[2020-07-20 21:46:01,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:46:01,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207722809]
[2020-07-20 21:46:01,779 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 21:46:01,816 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:46:01,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:46:01,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-20 21:46:01,821 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:46:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked.
[2020-07-20 21:46:01,871 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:46:02,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:46:02,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:46:02,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:46:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked.
[2020-07-20 21:46:02,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207722809]
[2020-07-20 21:46:02,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 21:46:02,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 10
[2020-07-20 21:46:02,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138497562]
[2020-07-20 21:46:02,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states
[2020-07-20 21:46:02,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:46:02,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants.
[2020-07-20 21:46:02,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90
[2020-07-20 21:46:02,162 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states.
[2020-07-20 21:46:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:46:02,214 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions.
[2020-07-20 21:46:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states.
[2020-07-20 21:46:02,214 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31
[2020-07-20 21:46:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:46:02,215 INFO L225 Difference]: With dead ends: 24
[2020-07-20 21:46:02,215 INFO L226 Difference]: Without dead ends: 0
[2020-07-20 21:46:02,216 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156
[2020-07-20 21:46:02,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-20 21:46:02,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-20 21:46:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-20 21:46:02,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-20 21:46:02,217 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31
[2020-07-20 21:46:02,217 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:46:02,217 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-20 21:46:02,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states.
[2020-07-20 21:46:02,218 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-20 21:46:02,218 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-20 21:46:02,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:46:02,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-20 21:46:02,517 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-07-20 21:46:02,518 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 21:46:02,518 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-07-20 21:46:02,518 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-07-20 21:46:02,518 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-07-20 21:46:02,518 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-07-20 21:46:02,519 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed.
[2020-07-20 21:46:02,519 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (<= sum_~n |sum_#in~n|) (< 0 sum_~n) (<= |sum_#in~n| sum_~n))
[2020-07-20 21:46:02,519 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed.
[2020-07-20 21:46:02,519 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed.
[2020-07-20 21:46:02,519 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed.
[2020-07-20 21:46:02,519 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true
[2020-07-20 21:46:02,520 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed.
[2020-07-20 21:46:02,520 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true
[2020-07-20 21:46:02,520 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed.
[2020-07-20 21:46:02,520 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed.
[2020-07-20 21:46:02,520 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed.
[2020-07-20 21:46:02,520 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 2 main_~a~0)
[2020-07-20 21:46:02,520 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed.
[2020-07-20 21:46:02,521 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed.
[2020-07-20 21:46:02,530 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:46:02 BoogieIcfgContainer
[2020-07-20 21:46:02,530 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 21:46:02,535 INFO L168 Benchmark]: Toolchain (without parser) took 5466.37 ms. Allocated memory was 137.4 MB in the beginning and 249.6 MB in the end (delta: 112.2 MB). Free memory was 102.4 MB in the beginning and 147.7 MB in the end (delta: -45.2 MB). Peak memory consumption was 67.0 MB. Max. memory is 7.1 GB.
[2020-07-20 21:46:02,538 INFO L168 Benchmark]: CDTParser took 0.61 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 21:46:02,540 INFO L168 Benchmark]: CACSL2BoogieTranslator took 407.30 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
[2020-07-20 21:46:02,547 INFO L168 Benchmark]: Boogie Preprocessor took 43.79 ms. Allocated memory is still 137.4 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB.
[2020-07-20 21:46:02,551 INFO L168 Benchmark]: RCFGBuilder took 471.91 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.4 MB in the beginning and 170.2 MB in the end (delta: -78.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
[2020-07-20 21:46:02,552 INFO L168 Benchmark]: TraceAbstraction took 4516.72 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 169.5 MB in the beginning and 147.7 MB in the end (delta: 21.9 MB). Peak memory consumption was 69.6 MB. Max. memory is 7.1 GB.
[2020-07-20 21:46:02,561 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 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 407.30 ms. Allocated memory is still 137.4 MB. Free memory was 102.0 MB in the beginning and 92.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 43.79 ms. Allocated memory is still 137.4 MB. Free memory was 92.8 MB in the beginning and 91.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 471.91 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 91.4 MB in the beginning and 170.2 MB in the end (delta: -78.8 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 4516.72 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 169.5 MB in the beginning and 147.7 MB in the end (delta: 21.9 MB). Peak memory consumption was 69.6 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 16]: 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
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 4, TraceHistogramMax: 4, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 51 SDslu, 212 SDs, 0 SdLazy, 226 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 174 GetRequests, 113 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=3, 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 21 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 2.0s InterpolantComputationTime, 88 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 14016 SizeOfPredicates, 19 NumberOfNonLiveVariables, 217 ConjunctsInSsa, 51 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 60/96 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...