/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c
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This is Ultimate 0.1.25-d623d84
[2020-07-21 00:31:40,466 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-21 00:31:40,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-21 00:31:40,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-21 00:31:40,481 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-21 00:31:40,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-21 00:31:40,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-21 00:31:40,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-21 00:31:40,487 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-21 00:31:40,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-21 00:31:40,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-21 00:31:40,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-21 00:31:40,491 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-21 00:31:40,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-21 00:31:40,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-21 00:31:40,494 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-21 00:31:40,495 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-21 00:31:40,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-21 00:31:40,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-21 00:31:40,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-21 00:31:40,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-21 00:31:40,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-21 00:31:40,503 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-21 00:31:40,504 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-21 00:31:40,506 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-21 00:31:40,507 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-21 00:31:40,507 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-21 00:31:40,508 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-21 00:31:40,508 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-21 00:31:40,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-21 00:31:40,509 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-21 00:31:40,510 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-21 00:31:40,511 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
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[2020-07-21 00:31:40,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-21 00:31:40,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-21 00:31:40,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-21 00:31:40,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-21 00:31:40,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-21 00:31:40,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-21 00:31:40,518 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-21 00:31:40,520 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-21 00:31:40,534 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-21 00:31:40,535 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-21 00:31:40,536 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-21 00:31:40,536 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-21 00:31:40,536 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-21 00:31:40,537 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-21 00:31:40,537 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-21 00:31:40,537 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-21 00:31:40,537 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-21 00:31:40,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-21 00:31:40,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-21 00:31:40,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-21 00:31:40,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-21 00:31:40,538 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-21 00:31:40,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-21 00:31:40,539 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-21 00:31:40,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-21 00:31:40,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-21 00:31:40,539 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-21 00:31:40,540 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-21 00:31:40,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-21 00:31:40,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 00:31:40,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-21 00:31:40,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-21 00:31:40,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-21 00:31:40,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-21 00:31:40,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:40,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-21 00:31:40,541 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-21 00:31:40,542 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-21 00:31:40,852 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-21 00:31:40,865 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-21 00:31:40,869 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-21 00:31:40,870 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-21 00:31:40,871 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-21 00:31:40,872 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Fibonacci01-1.c
[2020-07-21 00:31:40,941 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/503b70a5c/1a1bb4fd0e9c4299841e28a9169944e3/FLAG229f857aa
[2020-07-21 00:31:41,383 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-21 00:31:41,385 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Fibonacci01-1.c
[2020-07-21 00:31:41,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/503b70a5c/1a1bb4fd0e9c4299841e28a9169944e3/FLAG229f857aa
[2020-07-21 00:31:41,813 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/503b70a5c/1a1bb4fd0e9c4299841e28a9169944e3
[2020-07-21 00:31:41,821 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-21 00:31:41,823 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-21 00:31:41,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-21 00:31:41,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-21 00:31:41,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-21 00:31:41,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:41" (1/1) ...
[2020-07-21 00:31:41,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b61bea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:41, skipping insertion in model container
[2020-07-21 00:31:41,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 12:31:41" (1/1) ...
[2020-07-21 00:31:41,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-21 00:31:41,854 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-21 00:31:42,020 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-21 00:31:42,025 INFO L203 MainTranslator]: Completed pre-run
[2020-07-21 00:31:42,038 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-21 00:31:42,052 INFO L208 MainTranslator]: Completed translation
[2020-07-21 00:31:42,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42 WrapperNode
[2020-07-21 00:31:42,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-21 00:31:42,053 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-21 00:31:42,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-21 00:31:42,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-21 00:31:42,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ...
[2020-07-21 00:31:42,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ...
[2020-07-21 00:31:42,071 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ...
[2020-07-21 00:31:42,071 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ...
[2020-07-21 00:31:42,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ...
[2020-07-21 00:31:42,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ...
[2020-07-21 00:31:42,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ...
[2020-07-21 00:31:42,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-21 00:31:42,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-21 00:31:42,079 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-21 00:31:42,079 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-21 00:31:42,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-21 00:31:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-21 00:31:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-21 00:31:42,226 INFO L138 BoogieDeclarations]: Found implementation of procedure fibonacci
[2020-07-21 00:31:42,227 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-21 00:31:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-21 00:31:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-21 00:31:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure fibonacci
[2020-07-21 00:31:42,227 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-21 00:31:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-21 00:31:42,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-21 00:31:42,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-21 00:31:42,434 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-21 00:31:42,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:42 BoogieIcfgContainer
[2020-07-21 00:31:42,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-21 00:31:42,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-21 00:31:42,440 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-21 00:31:42,447 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-21 00:31:42,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 12:31:41" (1/3) ...
[2020-07-21 00:31:42,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22765616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:42, skipping insertion in model container
[2020-07-21 00:31:42,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 12:31:42" (2/3) ...
[2020-07-21 00:31:42,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22765616 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 12:31:42, skipping insertion in model container
[2020-07-21 00:31:42,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 12:31:42" (3/3) ...
[2020-07-21 00:31:42,453 INFO L109 eAbstractionObserver]: Analyzing ICFG Fibonacci01-1.c
[2020-07-21 00:31:42,471 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-21 00:31:42,478 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-21 00:31:42,495 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-21 00:31:42,524 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-21 00:31:42,524 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-21 00:31:42,525 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-21 00:31:42,525 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-21 00:31:42,525 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-21 00:31:42,525 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-21 00:31:42,525 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-21 00:31:42,526 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-21 00:31:42,546 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states.
[2020-07-21 00:31:42,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-21 00:31:42,553 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:42,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:42,555 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:42,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1900973920, now seen corresponding path program 1 times
[2020-07-21 00:31:42,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:42,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847940173]
[2020-07-21 00:31:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:42,640 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 00:31:42,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:42,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-21 00:31:42,650 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:31:42,760 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:31:42,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847940173]
[2020-07-21 00:31:42,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:31:42,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-21 00:31:42,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938079571]
[2020-07-21 00:31:42,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-21 00:31:42,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:42,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-21 00:31:42,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-07-21 00:31:42,781 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 6 states.
[2020-07-21 00:31:42,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:42,948 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions.
[2020-07-21 00:31:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-07-21 00:31:42,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14
[2020-07-21 00:31:42,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:42,961 INFO L225 Difference]: With dead ends: 36
[2020-07-21 00:31:42,962 INFO L226 Difference]: Without dead ends: 22
[2020-07-21 00:31:42,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-07-21 00:31:42,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states.
[2020-07-21 00:31:43,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22.
[2020-07-21 00:31:43,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-07-21 00:31:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions.
[2020-07-21 00:31:43,015 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 14
[2020-07-21 00:31:43,017 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:43,018 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions.
[2020-07-21 00:31:43,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-21 00:31:43,018 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions.
[2020-07-21 00:31:43,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16
[2020-07-21 00:31:43,020 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:43,020 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:43,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:43,235 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash -509871596, now seen corresponding path program 1 times
[2020-07-21 00:31:43,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:43,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044108361]
[2020-07-21 00:31:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:43,262 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 00:31:43,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-21 00:31:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-21 00:31:43,329 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:31:43,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044108361]
[2020-07-21 00:31:43,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:31:43,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-21 00:31:43,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418089103]
[2020-07-21 00:31:43,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-21 00:31:43,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:43,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-21 00:31:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-07-21 00:31:43,337 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states.
[2020-07-21 00:31:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:43,438 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions.
[2020-07-21 00:31:43,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-07-21 00:31:43,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15
[2020-07-21 00:31:43,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:43,440 INFO L225 Difference]: With dead ends: 28
[2020-07-21 00:31:43,441 INFO L226 Difference]: Without dead ends: 24
[2020-07-21 00:31:43,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-07-21 00:31:43,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-07-21 00:31:43,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22.
[2020-07-21 00:31:43,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states.
[2020-07-21 00:31:43,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions.
[2020-07-21 00:31:43,450 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15
[2020-07-21 00:31:43,450 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:43,450 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions.
[2020-07-21 00:31:43,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-21 00:31:43,451 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions.
[2020-07-21 00:31:43,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28
[2020-07-21 00:31:43,452 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:43,452 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:43,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:43,666 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:43,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:43,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1203666899, now seen corresponding path program 1 times
[2020-07-21 00:31:43,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:43,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755276681]
[2020-07-21 00:31:43,669 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
[2020-07-21 00:31:43,698 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-21 00:31:43,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:43,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core
[2020-07-21 00:31:43,703 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2020-07-21 00:31:43,762 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-21 00:31:43,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755276681]
[2020-07-21 00:31:43,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-21 00:31:43,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-21 00:31:43,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010199910]
[2020-07-21 00:31:43,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-21 00:31:43,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:43,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-21 00:31:43,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30
[2020-07-21 00:31:43,765 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 6 states.
[2020-07-21 00:31:43,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:43,868 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions.
[2020-07-21 00:31:43,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-07-21 00:31:43,868 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27
[2020-07-21 00:31:43,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:43,870 INFO L225 Difference]: With dead ends: 39
[2020-07-21 00:31:43,870 INFO L226 Difference]: Without dead ends: 24
[2020-07-21 00:31:43,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72
[2020-07-21 00:31:43,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states.
[2020-07-21 00:31:43,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24.
[2020-07-21 00:31:43,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states.
[2020-07-21 00:31:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions.
[2020-07-21 00:31:43,879 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 27
[2020-07-21 00:31:43,879 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:43,879 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions.
[2020-07-21 00:31:43,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-21 00:31:43,880 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions.
[2020-07-21 00:31:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29
[2020-07-21 00:31:43,881 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:43,882 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:44,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:44,095 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:44,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:44,096 INFO L82 PathProgramCache]: Analyzing trace with hash -603082491, now seen corresponding path program 1 times
[2020-07-21 00:31:44,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:44,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675705599]
[2020-07-21 00:31:44,097 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
[2020-07-21 00:31:44,141 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 00:31:44,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:44,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core
[2020-07-21 00:31:44,145 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:44,257 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked.
[2020-07-21 00:31:44,257 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-21 00:31:44,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:44,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:44,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked.
[2020-07-21 00:31:44,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675705599]
[2020-07-21 00:31:44,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-21 00:31:44,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17
[2020-07-21 00:31:44,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408164433]
[2020-07-21 00:31:44,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-07-21 00:31:44,643 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:44,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-07-21 00:31:44,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272
[2020-07-21 00:31:44,644 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 17 states.
[2020-07-21 00:31:44,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:44,917 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions.
[2020-07-21 00:31:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states.
[2020-07-21 00:31:44,918 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 28
[2020-07-21 00:31:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:44,920 INFO L225 Difference]: With dead ends: 34
[2020-07-21 00:31:44,920 INFO L226 Difference]: Without dead ends: 30
[2020-07-21 00:31:44,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462
[2020-07-21 00:31:44,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states.
[2020-07-21 00:31:44,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29.
[2020-07-21 00:31:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states.
[2020-07-21 00:31:44,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 38 transitions.
[2020-07-21 00:31:44,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 38 transitions. Word has length 28
[2020-07-21 00:31:44,930 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:44,931 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 38 transitions.
[2020-07-21 00:31:44,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-07-21 00:31:44,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 38 transitions.
[2020-07-21 00:31:44,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42
[2020-07-21 00:31:44,933 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:44,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:45,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:45,149 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:45,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:45,150 INFO L82 PathProgramCache]: Analyzing trace with hash -2046185202, now seen corresponding path program 2 times
[2020-07-21 00:31:45,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:45,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376442105]
[2020-07-21 00:31:45,153 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:45,201 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 00:31:45,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:45,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjunts are in the unsatisfiable core
[2020-07-21 00:31:45,207 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked.
[2020-07-21 00:31:45,275 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-21 00:31:45,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-07-21 00:31:45,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376442105]
[2020-07-21 00:31:45,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-21 00:31:45,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 11
[2020-07-21 00:31:45,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933044998]
[2020-07-21 00:31:45,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states
[2020-07-21 00:31:45,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:45,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants.
[2020-07-21 00:31:45,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110
[2020-07-21 00:31:45,600 INFO L87 Difference]: Start difference. First operand 29 states and 38 transitions. Second operand 11 states.
[2020-07-21 00:31:45,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:45,755 INFO L93 Difference]: Finished difference Result 56 states and 80 transitions.
[2020-07-21 00:31:45,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states.
[2020-07-21 00:31:45,757 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41
[2020-07-21 00:31:45,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:45,761 INFO L225 Difference]: With dead ends: 56
[2020-07-21 00:31:45,762 INFO L226 Difference]: Without dead ends: 34
[2020-07-21 00:31:45,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240
[2020-07-21 00:31:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-07-21 00:31:45,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31.
[2020-07-21 00:31:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2020-07-21 00:31:45,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions.
[2020-07-21 00:31:45,797 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 41
[2020-07-21 00:31:45,797 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:45,798 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions.
[2020-07-21 00:31:45,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states.
[2020-07-21 00:31:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions.
[2020-07-21 00:31:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43
[2020-07-21 00:31:45,800 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:45,800 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:46,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:46,014 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:46,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:46,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1391487784, now seen corresponding path program 3 times
[2020-07-21 00:31:46,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:46,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418989338]
[2020-07-21 00:31:46,017 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 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:46,049 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 00:31:46,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:46,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-07-21 00:31:46,053 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:46,195 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked.
[2020-07-21 00:31:46,195 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-21 00:31:46,750 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,812 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,889 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked.
[2020-07-21 00:31:46,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418989338]
[2020-07-21 00:31:46,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-21 00:31:46,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 23
[2020-07-21 00:31:46,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323320282]
[2020-07-21 00:31:46,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states
[2020-07-21 00:31:46,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:46,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants.
[2020-07-21 00:31:46,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506
[2020-07-21 00:31:46,937 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand 23 states.
[2020-07-21 00:31:47,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:47,460 INFO L93 Difference]: Finished difference Result 56 states and 88 transitions.
[2020-07-21 00:31:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states.
[2020-07-21 00:31:47,461 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 42
[2020-07-21 00:31:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:47,464 INFO L225 Difference]: With dead ends: 56
[2020-07-21 00:31:47,464 INFO L226 Difference]: Without dead ends: 50
[2020-07-21 00:31:47,465 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1022, Unknown=0, NotChecked=0, Total=1260
[2020-07-21 00:31:47,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states.
[2020-07-21 00:31:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41.
[2020-07-21 00:31:47,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states.
[2020-07-21 00:31:47,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 63 transitions.
[2020-07-21 00:31:47,479 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 63 transitions. Word has length 42
[2020-07-21 00:31:47,480 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:47,480 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 63 transitions.
[2020-07-21 00:31:47,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states.
[2020-07-21 00:31:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 63 transitions.
[2020-07-21 00:31:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84
[2020-07-21 00:31:47,483 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:47,484 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:47,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:47,698 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:47,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1434057987, now seen corresponding path program 4 times
[2020-07-21 00:31:47,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:47,700 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50695199]
[2020-07-21 00:31:47,701 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 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:47,740 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-21 00:31:47,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:47,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core
[2020-07-21 00:31:47,745 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:47,816 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 104 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked.
[2020-07-21 00:31:47,816 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-21 00:31:48,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:48,256 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:48,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:48,289 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 107 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked.
[2020-07-21 00:31:48,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50695199]
[2020-07-21 00:31:48,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-21 00:31:48,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13
[2020-07-21 00:31:48,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546523221]
[2020-07-21 00:31:48,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states
[2020-07-21 00:31:48,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:48,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants.
[2020-07-21 00:31:48,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156
[2020-07-21 00:31:48,292 INFO L87 Difference]: Start difference. First operand 41 states and 63 transitions. Second operand 13 states.
[2020-07-21 00:31:48,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:48,544 INFO L93 Difference]: Finished difference Result 88 states and 151 transitions.
[2020-07-21 00:31:48,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states.
[2020-07-21 00:31:48,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 83
[2020-07-21 00:31:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:48,547 INFO L225 Difference]: With dead ends: 88
[2020-07-21 00:31:48,547 INFO L226 Difference]: Without dead ends: 54
[2020-07-21 00:31:48,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 145 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380
[2020-07-21 00:31:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states.
[2020-07-21 00:31:48,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46.
[2020-07-21 00:31:48,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states.
[2020-07-21 00:31:48,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions.
[2020-07-21 00:31:48,571 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 83
[2020-07-21 00:31:48,572 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:48,572 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions.
[2020-07-21 00:31:48,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states.
[2020-07-21 00:31:48,572 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions.
[2020-07-21 00:31:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98
[2020-07-21 00:31:48,574 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:48,574 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 6, 6, 6, 6, 6, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:48,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:48,777 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:48,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:48,778 INFO L82 PathProgramCache]: Analyzing trace with hash -168777920, now seen corresponding path program 5 times
[2020-07-21 00:31:48,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:48,779 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328914533]
[2020-07-21 00:31:48,779 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 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:48,831 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 00:31:48,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:48,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core
[2020-07-21 00:31:48,836 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:48,928 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 170 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked.
[2020-07-21 00:31:48,931 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-21 00:31:49,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:49,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:49,436 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:49,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:49,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:49,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:49,776 INFO L134 CoverageAnalysis]: Checked inductivity of 427 backedges. 106 proven. 182 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked.
[2020-07-21 00:31:49,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328914533]
[2020-07-21 00:31:49,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-21 00:31:49,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17
[2020-07-21 00:31:49,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999376307]
[2020-07-21 00:31:49,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states
[2020-07-21 00:31:49,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:49,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants.
[2020-07-21 00:31:49,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272
[2020-07-21 00:31:49,779 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand 17 states.
[2020-07-21 00:31:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:50,152 INFO L93 Difference]: Finished difference Result 106 states and 166 transitions.
[2020-07-21 00:31:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2020-07-21 00:31:50,154 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97
[2020-07-21 00:31:50,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:50,156 INFO L225 Difference]: With dead ends: 106
[2020-07-21 00:31:50,156 INFO L226 Difference]: Without dead ends: 69
[2020-07-21 00:31:50,159 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 169 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=237, Invalid=575, Unknown=0, NotChecked=0, Total=812
[2020-07-21 00:31:50,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states.
[2020-07-21 00:31:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60.
[2020-07-21 00:31:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states.
[2020-07-21 00:31:50,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions.
[2020-07-21 00:31:50,171 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 97
[2020-07-21 00:31:50,171 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:50,171 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions.
[2020-07-21 00:31:50,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states.
[2020-07-21 00:31:50,172 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions.
[2020-07-21 00:31:50,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152
[2020-07-21 00:31:50,174 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:50,174 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 10, 10, 10, 10, 10, 10, 10, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:50,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:50,382 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:50,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:50,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1072608948, now seen corresponding path program 6 times
[2020-07-21 00:31:50,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:50,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478587061]
[2020-07-21 00:31:50,384 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 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:50,474 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-21 00:31:50,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjunts are in the unsatisfiable core
[2020-07-21 00:31:50,489 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 249 proven. 418 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked.
[2020-07-21 00:31:50,607 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-21 00:31:51,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:51,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:51,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:51,914 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:51,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:52,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:31:52,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 249 proven. 445 refuted. 0 times theorem prover too weak. 462 trivial. 0 not checked.
[2020-07-21 00:31:52,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478587061]
[2020-07-21 00:31:52,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-21 00:31:52,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21
[2020-07-21 00:31:52,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237656153]
[2020-07-21 00:31:52,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states
[2020-07-21 00:31:52,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:31:52,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants.
[2020-07-21 00:31:52,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420
[2020-07-21 00:31:52,094 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand 21 states.
[2020-07-21 00:31:52,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:31:52,647 INFO L93 Difference]: Finished difference Result 130 states and 224 transitions.
[2020-07-21 00:31:52,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states.
[2020-07-21 00:31:52,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 151
[2020-07-21 00:31:52,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:31:52,650 INFO L225 Difference]: With dead ends: 130
[2020-07-21 00:31:52,650 INFO L226 Difference]: Without dead ends: 79
[2020-07-21 00:31:52,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 265 SyntacticMatches, 17 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=969, Unknown=0, NotChecked=0, Total=1332
[2020-07-21 00:31:52,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states.
[2020-07-21 00:31:52,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72.
[2020-07-21 00:31:52,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states.
[2020-07-21 00:31:52,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions.
[2020-07-21 00:31:52,663 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 151
[2020-07-21 00:31:52,663 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:31:52,663 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions.
[2020-07-21 00:31:52,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states.
[2020-07-21 00:31:52,664 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions.
[2020-07-21 00:31:52,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179
[2020-07-21 00:31:52,666 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-21 00:31:52,667 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 12, 12, 12, 12, 12, 12, 12, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-21 00:31:52,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:52,880 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-21 00:31:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-21 00:31:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash 375112636, now seen corresponding path program 7 times
[2020-07-21 00:31:52,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-21 00:31:52,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390235311]
[2020-07-21 00:31:52,883 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 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:31:52,977 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-21 00:31:52,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-21 00:31:52,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 65 conjunts are in the unsatisfiable core
[2020-07-21 00:31:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-21 00:31:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 258 proven. 604 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked.
[2020-07-21 00:31:53,421 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-21 00:31:54,350 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 92
[2020-07-21 00:31:54,483 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 92
[2020-07-21 00:31:54,616 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 97
[2020-07-21 00:31:54,751 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 97
[2020-07-21 00:31:55,415 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification that was a NOOP. DAG size: 142
[2020-07-21 00:31:55,642 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 142
[2020-07-21 00:31:55,904 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 146
[2020-07-21 00:31:56,154 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 146
[2020-07-21 00:31:58,468 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 92
[2020-07-21 00:31:58,599 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 92
[2020-07-21 00:31:58,736 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 97
[2020-07-21 00:31:58,873 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 97
[2020-07-21 00:32:00,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:00,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:00,065 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:00,284 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:00,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:00,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:01,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:01,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:01,497 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:01,498 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:01,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:01,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:01,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:01,631 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:01,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,054 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,111 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,249 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,410 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,411 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,419 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-21 00:32:02,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 207 proven. 695 refuted. 0 times theorem prover too weak. 752 trivial. 0 not checked.
[2020-07-21 00:32:02,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390235311]
[2020-07-21 00:32:02,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-21 00:32:02,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 35] total 48
[2020-07-21 00:32:02,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946832264]
[2020-07-21 00:32:02,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states
[2020-07-21 00:32:02,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-21 00:32:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants.
[2020-07-21 00:32:02,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1962, Unknown=0, NotChecked=0, Total=2256
[2020-07-21 00:32:02,501 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand 48 states.
[2020-07-21 00:32:03,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-21 00:32:03,914 INFO L93 Difference]: Finished difference Result 96 states and 147 transitions.
[2020-07-21 00:32:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states.
[2020-07-21 00:32:03,915 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 178
[2020-07-21 00:32:03,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-21 00:32:03,916 INFO L225 Difference]: With dead ends: 96
[2020-07-21 00:32:03,917 INFO L226 Difference]: Without dead ends: 0
[2020-07-21 00:32:03,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 268 SyntacticMatches, 41 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=757, Invalid=4499, Unknown=0, NotChecked=0, Total=5256
[2020-07-21 00:32:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states.
[2020-07-21 00:32:03,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0.
[2020-07-21 00:32:03,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states.
[2020-07-21 00:32:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions.
[2020-07-21 00:32:03,920 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 178
[2020-07-21 00:32:03,920 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-21 00:32:03,920 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions.
[2020-07-21 00:32:03,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states.
[2020-07-21 00:32:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions.
[2020-07-21 00:32:03,920 INFO L282 IsEmpty]: Finished isEmpty. No accepting run.
[2020-07-21 00:32:04,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-21 00:32:04,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.
[2020-07-21 00:32:04,738 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 24
[2020-07-21 00:32:04,741 INFO L268 CegarLoopResult]: For program point fibonacciFINAL(lines 14 22) no Hoare annotation was computed.
[2020-07-21 00:32:04,742 INFO L271 CegarLoopResult]: At program point fibonacciENTRY(lines 14 22) the Hoare annotation is: true
[2020-07-21 00:32:04,742 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (<= |fibonacci_#in~n| fibonacci_~n) (<= 2 |fibonacci_#in~n|) (<= fibonacci_~n |fibonacci_#in~n|))
[2020-07-21 00:32:04,742 INFO L268 CegarLoopResult]: For program point L20-1(line 20) no Hoare annotation was computed.
[2020-07-21 00:32:04,742 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse0 (<= |fibonacci_#in~n| fibonacci_~n)) (.cse1 (<= fibonacci_~n |fibonacci_#in~n|))) (or (and .cse0 (<= 2 |fibonacci_#t~ret0|) (<= 4 |fibonacci_#in~n|) (< |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 5)) .cse1) (and (<= 1 |fibonacci_#t~ret0|) .cse0 (<= 2 |fibonacci_#in~n|) (<= |fibonacci_#in~n| 2) .cse1) (and .cse0 (< |fibonacci_#in~n| (+ |fibonacci_#t~ret0| 3)) (<= 3 fibonacci_~n) .cse1)))
[2020-07-21 00:32:04,742 INFO L268 CegarLoopResult]: For program point fibonacciEXIT(lines 14 22) no Hoare annotation was computed.
[2020-07-21 00:32:04,742 INFO L268 CegarLoopResult]: For program point L17(lines 17 21) no Hoare annotation was computed.
[2020-07-21 00:32:04,743 INFO L268 CegarLoopResult]: For program point L20-3(line 20) no Hoare annotation was computed.
[2020-07-21 00:32:04,743 INFO L268 CegarLoopResult]: For program point L15(lines 15 21) no Hoare annotation was computed.
[2020-07-21 00:32:04,743 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true
[2020-07-21 00:32:04,743 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed.
[2020-07-21 00:32:04,743 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed.
[2020-07-21 00:32:04,743 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true
[2020-07-21 00:32:04,743 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true
[2020-07-21 00:32:04,743 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed.
[2020-07-21 00:32:04,744 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 34) no Hoare annotation was computed.
[2020-07-21 00:32:04,744 INFO L268 CegarLoopResult]: For program point L31(lines 31 35) no Hoare annotation was computed.
[2020-07-21 00:32:04,744 INFO L271 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: true
[2020-07-21 00:32:04,744 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 36) the Hoare annotation is: true
[2020-07-21 00:32:04,744 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed.
[2020-07-21 00:32:04,744 INFO L268 CegarLoopResult]: For program point L27(lines 27 29) no Hoare annotation was computed.
[2020-07-21 00:32:04,744 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 36) no Hoare annotation was computed.
[2020-07-21 00:32:04,744 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 36) no Hoare annotation was computed.
[2020-07-21 00:32:04,745 INFO L268 CegarLoopResult]: For program point L34(line 34) no Hoare annotation was computed.
[2020-07-21 00:32:04,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 12:32:04 BoogieIcfgContainer
[2020-07-21 00:32:04,750 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-21 00:32:04,752 INFO L168 Benchmark]: Toolchain (without parser) took 22930.17 ms. Allocated memory was 144.7 MB in the beginning and 403.7 MB in the end (delta: 259.0 MB). Free memory was 102.6 MB in the beginning and 341.6 MB in the end (delta: -239.0 MB). Peak memory consumption was 276.1 MB. Max. memory is 7.1 GB.
[2020-07-21 00:32:04,753 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
[2020-07-21 00:32:04,754 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.70 ms. Allocated memory is still 144.7 MB. Free memory was 102.2 MB in the beginning and 92.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
[2020-07-21 00:32:04,754 INFO L168 Benchmark]: Boogie Preprocessor took 25.06 ms. Allocated memory is still 144.7 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-07-21 00:32:04,755 INFO L168 Benchmark]: RCFGBuilder took 360.26 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.5 MB in the beginning and 168.6 MB in the end (delta: -77.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
[2020-07-21 00:32:04,756 INFO L168 Benchmark]: TraceAbstraction took 22310.28 ms. Allocated memory was 201.3 MB in the beginning and 403.7 MB in the end (delta: 202.4 MB). Free memory was 168.0 MB in the beginning and 341.6 MB in the end (delta: -173.7 MB). Peak memory consumption was 284.8 MB. Max. memory is 7.1 GB.
[2020-07-21 00:32:04,760 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB.
* CACSL2BoogieTranslator took 228.70 ms. Allocated memory is still 144.7 MB. Free memory was 102.2 MB in the beginning and 92.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 25.06 ms. Allocated memory is still 144.7 MB. Free memory was 92.9 MB in the beginning and 91.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 360.26 ms. Allocated memory was 144.7 MB in the beginning and 201.3 MB in the end (delta: 56.6 MB). Free memory was 91.5 MB in the beginning and 168.6 MB in the end (delta: -77.1 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 22310.28 ms. Allocated memory was 201.3 MB in the beginning and 403.7 MB in the end (delta: 202.4 MB). Free memory was 168.0 MB in the beginning and 341.6 MB in the end (delta: -173.7 MB). Peak memory consumption was 284.8 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- PositiveResult [Line: 34]: 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, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 21.6s, OverallIterations: 10, TraceHistogramMax: 25, AutomataDifference: 3.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 195 SDtfs, 526 SDslu, 1034 SDs, 0 SdLazy, 2066 SolverSat, 756 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1381 GetRequests, 1046 SyntacticMatches, 99 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3230 ImplicationChecksByTransitivity, 4.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=72occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 39 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 116 PreInvPairs, 180 NumberOfFragments, 66 HoareAnnotationTreeSize, 116 FomulaSimplifications, 694 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 8 FomulaSimplificationsInter, 993 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 14.6s InterpolantComputationTime, 676 NumberOfCodeBlocks, 555 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1279 ConstructedInterpolants, 0 QuantifiedInterpolants, 389804 SizeOfPredicates, 57 NumberOfNonLiveVariables, 1258 ConjunctsInSsa, 166 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 4471/7298 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...