/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c
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This is Ultimate 0.1.25-d623d84
[2020-07-20 21:13:49,102 INFO L177 SettingsManager]: Resetting all preferences to default values...
[2020-07-20 21:13:49,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values
[2020-07-20 21:13:49,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring...
[2020-07-20 21:13:49,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values
[2020-07-20 21:13:49,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values
[2020-07-20 21:13:49,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values
[2020-07-20 21:13:49,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values
[2020-07-20 21:13:49,148 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values
[2020-07-20 21:13:49,150 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values
[2020-07-20 21:13:49,151 INFO L181 SettingsManager]: Resetting Sifa preferences to default values
[2020-07-20 21:13:49,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring...
[2020-07-20 21:13:49,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values
[2020-07-20 21:13:49,155 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values
[2020-07-20 21:13:49,156 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values
[2020-07-20 21:13:49,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values
[2020-07-20 21:13:49,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values
[2020-07-20 21:13:49,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values
[2020-07-20 21:13:49,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values
[2020-07-20 21:13:49,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values
[2020-07-20 21:13:49,180 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values
[2020-07-20 21:13:49,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values
[2020-07-20 21:13:49,186 INFO L181 SettingsManager]: Resetting Referee preferences to default values
[2020-07-20 21:13:49,187 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values
[2020-07-20 21:13:49,190 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring...
[2020-07-20 21:13:49,190 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring...
[2020-07-20 21:13:49,190 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values
[2020-07-20 21:13:49,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values
[2020-07-20 21:13:49,194 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values
[2020-07-20 21:13:49,196 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring...
[2020-07-20 21:13:49,197 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values
[2020-07-20 21:13:49,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values
[2020-07-20 21:13:49,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values
[2020-07-20 21:13:49,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values
[2020-07-20 21:13:49,203 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring...
[2020-07-20 21:13:49,203 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values
[2020-07-20 21:13:49,203 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring...
[2020-07-20 21:13:49,204 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring...
[2020-07-20 21:13:49,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values
[2020-07-20 21:13:49,205 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values
[2020-07-20 21:13:49,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values...
[2020-07-20 21:13:49,208 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf
[2020-07-20 21:13:49,241 INFO L113 SettingsManager]: Loading preferences was successful
[2020-07-20 21:13:49,245 INFO L115 SettingsManager]: Preferences different from defaults after loading the file:
[2020-07-20 21:13:49,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults:
[2020-07-20 21:13:49,247 INFO L138 SettingsManager]: * Create parallel compositions if possible=false
[2020-07-20 21:13:49,247 INFO L138 SettingsManager]: * Use SBE=true
[2020-07-20 21:13:49,247 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults:
[2020-07-20 21:13:49,247 INFO L138 SettingsManager]: * sizeof long=4
[2020-07-20 21:13:49,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true
[2020-07-20 21:13:49,248 INFO L138 SettingsManager]: * sizeof POINTER=4
[2020-07-20 21:13:49,248 INFO L138 SettingsManager]: * Check division by zero=IGNORE
[2020-07-20 21:13:49,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE
[2020-07-20 21:13:49,248 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE
[2020-07-20 21:13:49,248 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE
[2020-07-20 21:13:49,249 INFO L138 SettingsManager]: * sizeof long double=12
[2020-07-20 21:13:49,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false
[2020-07-20 21:13:49,249 INFO L138 SettingsManager]: * Use constant arrays=true
[2020-07-20 21:13:49,249 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE
[2020-07-20 21:13:49,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults:
[2020-07-20 21:13:49,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements
[2020-07-20 21:13:49,250 INFO L138 SettingsManager]: * To the following directory=./dump/
[2020-07-20 21:13:49,250 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode
[2020-07-20 21:13:49,250 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 21:13:49,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults:
[2020-07-20 21:13:49,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP
[2020-07-20 21:13:49,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles
[2020-07-20 21:13:49,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL
[2020-07-20 21:13:49,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:13:49,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true
[2020-07-20 21:13:49,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE
[2020-07-20 21:13:49,252 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS
Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4
[2020-07-20 21:13:49,613 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp
[2020-07-20 21:13:49,641 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized
[2020-07-20 21:13:49,646 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected.
[2020-07-20 21:13:49,648 INFO L271 PluginConnector]: Initializing CDTParser...
[2020-07-20 21:13:49,648 INFO L275 PluginConnector]: CDTParser initialized
[2020-07-20 21:13:49,649 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c
[2020-07-20 21:13:49,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e8d196c/84b2e50d5a23438188eb14300a2c2cee/FLAGf7beb55ed
[2020-07-20 21:13:50,362 INFO L306 CDTParser]: Found 1 translation units.
[2020-07-20 21:13:50,363 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi03-2.c
[2020-07-20 21:13:50,371 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e8d196c/84b2e50d5a23438188eb14300a2c2cee/FLAGf7beb55ed
[2020-07-20 21:13:50,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25e8d196c/84b2e50d5a23438188eb14300a2c2cee
[2020-07-20 21:13:50,712 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] #######################
[2020-07-20 21:13:50,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements.
[2020-07-20 21:13:50,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator----------------------------
[2020-07-20 21:13:50,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator...
[2020-07-20 21:13:50,722 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized
[2020-07-20 21:13:50,723 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,727 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ba21af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50, skipping insertion in model container
[2020-07-20 21:13:50,728 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode
[2020-07-20 21:13:50,760 INFO L178 MainTranslator]: Built tables and reachable declarations
[2020-07-20 21:13:50,934 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:13:50,940 INFO L203 MainTranslator]: Completed pre-run
[2020-07-20 21:13:50,955 INFO L206 PostProcessor]: Analyzing one entry point: main
[2020-07-20 21:13:50,971 INFO L208 MainTranslator]: Completed translation
[2020-07-20 21:13:50,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50 WrapperNode
[2020-07-20 21:13:50,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator----------------------------
[2020-07-20 21:13:50,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor----------------------------
[2020-07-20 21:13:50,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor...
[2020-07-20 21:13:50,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized
[2020-07-20 21:13:50,985 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,992 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,992 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:50,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:51,001 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
[2020-07-20 21:13:51,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor----------------------------
[2020-07-20 21:13:51,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder----------------------------
[2020-07-20 21:13:51,003 INFO L271 PluginConnector]: Initializing RCFGBuilder...
[2020-07-20 21:13:51,003 INFO L275 PluginConnector]: RCFGBuilder initialized
[2020-07-20 21:13:51,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (1/1) ...
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000
[2020-07-20 21:13:51,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init
[2020-07-20 21:13:51,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start
[2020-07-20 21:13:51,174 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi
[2020-07-20 21:13:51,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main
[2020-07-20 21:13:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error
[2020-07-20 21:13:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int
[2020-07-20 21:13:51,175 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi
[2020-07-20 21:13:51,176 INFO L130 BoogieDeclarations]: Found specification of procedure main
[2020-07-20 21:13:51,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init
[2020-07-20 21:13:51,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start
[2020-07-20 21:13:51,376 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start)
[2020-07-20 21:13:51,376 INFO L295 CfgBuilder]: Removed 0 assume(true) statements.
[2020-07-20 21:13:51,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:51 BoogieIcfgContainer
[2020-07-20 21:13:51,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder----------------------------
[2020-07-20 21:13:51,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction----------------------------
[2020-07-20 21:13:51,383 INFO L271 PluginConnector]: Initializing TraceAbstraction...
[2020-07-20 21:13:51,386 INFO L275 PluginConnector]: TraceAbstraction initialized
[2020-07-20 21:13:51,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:13:50" (1/3) ...
[2020-07-20 21:13:51,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d7e9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:51, skipping insertion in model container
[2020-07-20 21:13:51,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:13:50" (2/3) ...
[2020-07-20 21:13:51,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74d7e9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:13:51, skipping insertion in model container
[2020-07-20 21:13:51,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:13:51" (3/3) ...
[2020-07-20 21:13:51,391 INFO L109 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c
[2020-07-20 21:13:51,405 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION
[2020-07-20 21:13:51,415 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations.
[2020-07-20 21:13:51,436 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations.
[2020-07-20 21:13:51,464 INFO L375 AbstractCegarLoop]: Interprodecural is true
[2020-07-20 21:13:51,464 INFO L376 AbstractCegarLoop]: Hoare is true
[2020-07-20 21:13:51,464 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect
[2020-07-20 21:13:51,464 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE
[2020-07-20 21:13:51,465 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION
[2020-07-20 21:13:51,465 INFO L380 AbstractCegarLoop]: Difference is false
[2020-07-20 21:13:51,465 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA
[2020-07-20 21:13:51,465 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce========
[2020-07-20 21:13:51,485 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states.
[2020-07-20 21:13:51,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15
[2020-07-20 21:13:51,493 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:13:51,494 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:13:51,495 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:13:51,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:13:51,501 INFO L82 PathProgramCache]: Analyzing trace with hash 913793727, now seen corresponding path program 1 times
[2020-07-20 21:13:51,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:13:51,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232753291]
[2020-07-20 21:13:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:13:51,601 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s)
[2020-07-20 21:13:51,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:13:51,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 7 conjunts are in the unsatisfiable core
[2020-07-20 21:13:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:13:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.
[2020-07-20 21:13:51,844 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect
[2020-07-20 21:13:51,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232753291]
[2020-07-20 21:13:51,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:13:51,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6
[2020-07-20 21:13:51,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195593202]
[2020-07-20 21:13:51,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states
[2020-07-20 21:13:51,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:13:51,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants.
[2020-07-20 21:13:51,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30
[2020-07-20 21:13:51,870 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 6 states.
[2020-07-20 21:13:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:13:52,039 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions.
[2020-07-20 21:13:52,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states.
[2020-07-20 21:13:52,042 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14
[2020-07-20 21:13:52,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:13:52,056 INFO L225 Difference]: With dead ends: 33
[2020-07-20 21:13:52,056 INFO L226 Difference]: Without dead ends: 19
[2020-07-20 21:13:52,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42
[2020-07-20 21:13:52,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states.
[2020-07-20 21:13:52,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19.
[2020-07-20 21:13:52,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states.
[2020-07-20 21:13:52,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions.
[2020-07-20 21:13:52,121 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14
[2020-07-20 21:13:52,121 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:13:52,122 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions.
[2020-07-20 21:13:52,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states.
[2020-07-20 21:13:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions.
[2020-07-20 21:13:52,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21
[2020-07-20 21:13:52,125 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:13:52,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:13:52,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:13:52,342 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:13:52,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:13:52,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1998834103, now seen corresponding path program 1 times
[2020-07-20 21:13:52,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:13:52,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323697399]
[2020-07-20 21:13:52,344 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:13:52,385 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:13:52,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:13:52,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 11 conjunts are in the unsatisfiable core
[2020-07-20 21:13:52,390 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:13:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.
[2020-07-20 21:13:52,594 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:13:52,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:13:53,009 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:14:19,135 WARN L193 SmtUtils]: Spent 9.60 s on a formula simplification that was a NOOP. DAG size: 19
[2020-07-20 21:14:30,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts
[2020-07-20 21:14:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.
[2020-07-20 21:14:32,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323697399]
[2020-07-20 21:14:32,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences.
[2020-07-20 21:14:32,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15
[2020-07-20 21:14:32,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385521794]
[2020-07-20 21:14:32,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states
[2020-07-20 21:14:32,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:14:32,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants.
[2020-07-20 21:14:32,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=161, Unknown=10, NotChecked=0, Total=210
[2020-07-20 21:14:32,480 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 15 states.
[2020-07-20 21:14:39,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:14:39,717 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions.
[2020-07-20 21:14:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-07-20 21:14:39,720 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20
[2020-07-20 21:14:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:14:39,722 INFO L225 Difference]: With dead ends: 31
[2020-07-20 21:14:39,722 INFO L226 Difference]: Without dead ends: 25
[2020-07-20 21:14:39,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=76, Invalid=291, Unknown=13, NotChecked=0, Total=380
[2020-07-20 21:14:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states.
[2020-07-20 21:14:39,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25.
[2020-07-20 21:14:39,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states.
[2020-07-20 21:14:39,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions.
[2020-07-20 21:14:39,732 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20
[2020-07-20 21:14:39,733 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:14:39,733 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions.
[2020-07-20 21:14:39,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states.
[2020-07-20 21:14:39,733 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions.
[2020-07-20 21:14:39,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33
[2020-07-20 21:14:39,735 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:14:39,735 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:14:39,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:14:39,950 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:14:39,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:14:39,951 INFO L82 PathProgramCache]: Analyzing trace with hash -547108535, now seen corresponding path program 2 times
[2020-07-20 21:14:39,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:14:39,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463453672]
[2020-07-20 21:14:39,953 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:14:39,989 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:14:39,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:14:39,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 19 conjunts are in the unsatisfiable core
[2020-07-20 21:14:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:14:50,939 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked.
[2020-07-20 21:14:50,940 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:14:51,817 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:14:51,934 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:14:52,057 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 46
[2020-07-20 21:14:53,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463453672]
[2020-07-20 21:14:53,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-20 21:14:53,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12
[2020-07-20 21:14:53,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677223956]
[2020-07-20 21:14:53,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states
[2020-07-20 21:14:53,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:14:53,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants.
[2020-07-20 21:14:53,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=219, Unknown=5, NotChecked=0, Total=272
[2020-07-20 21:14:53,150 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 12 states.
[2020-07-20 21:15:04,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:15:04,688 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions.
[2020-07-20 21:15:04,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states.
[2020-07-20 21:15:04,693 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32
[2020-07-20 21:15:04,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:15:04,695 INFO L225 Difference]: With dead ends: 32
[2020-07-20 21:15:04,695 INFO L226 Difference]: Without dead ends: 28
[2020-07-20 21:15:04,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=90, Invalid=457, Unknown=5, NotChecked=0, Total=552
[2020-07-20 21:15:04,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states.
[2020-07-20 21:15:04,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28.
[2020-07-20 21:15:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states.
[2020-07-20 21:15:04,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions.
[2020-07-20 21:15:04,705 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 32
[2020-07-20 21:15:04,705 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:15:04,705 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions.
[2020-07-20 21:15:04,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states.
[2020-07-20 21:15:04,706 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions.
[2020-07-20 21:15:04,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39
[2020-07-20 21:15:04,707 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:15:04,707 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:15:04,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:15:04,912 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:15:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:15:04,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1152432193, now seen corresponding path program 3 times
[2020-07-20 21:15:04,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:15:04,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362256139]
[2020-07-20 21:15:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions)
No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3
Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null)
Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:15:04,960 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:15:04,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:15:04,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 23 conjunts are in the unsatisfiable core
[2020-07-20 21:15:04,966 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:15:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked.
[2020-07-20 21:15:33,473 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:15:34,510 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:15:34,634 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:15:34,760 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:15:34,886 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:15:35,033 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:15:35,173 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:15:35,369 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 57
[2020-07-20 21:15:35,530 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 57
[2020-07-20 21:15:36,601 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:15:36,710 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:15:36,840 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:15:36,972 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:15:37,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362256139]
[2020-07-20 21:15:37,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-20 21:15:37,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14
[2020-07-20 21:15:37,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432776223]
[2020-07-20 21:15:37,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states
[2020-07-20 21:15:37,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:15:37,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants.
[2020-07-20 21:15:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=273, Unknown=13, NotChecked=0, Total=342
[2020-07-20 21:15:37,171 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 14 states.
[2020-07-20 21:16:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:16:22,209 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions.
[2020-07-20 21:16:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states.
[2020-07-20 21:16:22,218 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38
[2020-07-20 21:16:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:16:22,220 INFO L225 Difference]: With dead ends: 35
[2020-07-20 21:16:22,220 INFO L226 Difference]: Without dead ends: 31
[2020-07-20 21:16:22,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 53.0s TimeCoverageRelationStatistics Valid=110, Invalid=627, Unknown=19, NotChecked=0, Total=756
[2020-07-20 21:16:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states.
[2020-07-20 21:16:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31.
[2020-07-20 21:16:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states.
[2020-07-20 21:16:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions.
[2020-07-20 21:16:22,229 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 38
[2020-07-20 21:16:22,230 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:16:22,230 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions.
[2020-07-20 21:16:22,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states.
[2020-07-20 21:16:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions.
[2020-07-20 21:16:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45
[2020-07-20 21:16:22,232 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:16:22,232 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:16:22,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:16:22,447 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:16:22,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:16:22,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1461718089, now seen corresponding path program 4 times
[2020-07-20 21:16:22,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:16:22,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078210227]
[2020-07-20 21:16:22,449 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
[2020-07-20 21:16:22,509 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:16:22,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:16:22,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjunts are in the unsatisfiable core
[2020-07-20 21:16:22,515 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:17:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked.
[2020-07-20 21:17:25,383 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:17:26,411 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:17:26,521 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:17:26,666 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:26,805 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:26,964 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:17:27,122 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:17:27,308 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:17:27,484 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:17:27,692 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:17:27,897 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:17:28,120 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:17:28,347 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:17:28,611 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:17:28,860 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:17:29,131 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 68
[2020-07-20 21:17:29,400 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification that was a NOOP. DAG size: 68
[2020-07-20 21:17:30,485 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:17:30,607 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:17:30,739 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:30,883 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:31,044 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:17:31,203 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:17:31,387 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:17:31,570 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:17:31,782 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:17:31,982 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:17:32,268 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:17:32,499 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:17:32,655 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 46
[2020-07-20 21:17:32,776 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:17:33,032 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078210227]
[2020-07-20 21:17:33,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-20 21:17:33,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16
[2020-07-20 21:17:33,033 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317084694]
[2020-07-20 21:17:33,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states
[2020-07-20 21:17:33,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:17:33,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants.
[2020-07-20 21:17:33,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=328, Unknown=28, NotChecked=0, Total=420
[2020-07-20 21:17:33,035 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 16 states.
[2020-07-20 21:19:58,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:19:58,995 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions.
[2020-07-20 21:19:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states.
[2020-07-20 21:19:59,010 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44
[2020-07-20 21:19:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:19:59,012 INFO L225 Difference]: With dead ends: 38
[2020-07-20 21:19:59,012 INFO L226 Difference]: Without dead ends: 34
[2020-07-20 21:19:59,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 149.4s TimeCoverageRelationStatistics Valid=130, Invalid=809, Unknown=53, NotChecked=0, Total=992
[2020-07-20 21:19:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states.
[2020-07-20 21:19:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34.
[2020-07-20 21:19:59,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states.
[2020-07-20 21:19:59,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions.
[2020-07-20 21:19:59,023 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 44
[2020-07-20 21:19:59,023 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:19:59,023 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions.
[2020-07-20 21:19:59,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states.
[2020-07-20 21:19:59,024 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions.
[2020-07-20 21:19:59,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51
[2020-07-20 21:19:59,026 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:19:59,026 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:19:59,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:19:59,231 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:19:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:19:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash -269168065, now seen corresponding path program 5 times
[2020-07-20 21:19:59,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:19:59,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432876630]
[2020-07-20 21:19:59,233 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
[2020-07-20 21:19:59,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s)
[2020-07-20 21:19:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:19:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core
[2020-07-20 21:19:59,323 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:21:44,630 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 35
[2020-07-20 21:21:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked.
[2020-07-20 21:21:44,691 INFO L328 TraceCheckSpWp]: Computing backward predicates...
[2020-07-20 21:21:45,712 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 20
[2020-07-20 21:21:45,837 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 20
[2020-07-20 21:21:45,995 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 25
[2020-07-20 21:21:46,149 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 25
[2020-07-20 21:21:46,339 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:21:46,526 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:21:46,745 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:21:46,961 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:21:47,209 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:21:47,457 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:21:47,738 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:21:48,021 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:21:48,335 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:21:48,646 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:21:49,006 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:21:49,350 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:21:49,729 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:21:50,107 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:21:50,523 WARN L193 SmtUtils]: Spent 408.00 ms on a formula simplification that was a NOOP. DAG size: 69
[2020-07-20 21:21:50,932 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 69
[2020-07-20 21:21:51,400 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification that was a NOOP. DAG size: 75
[2020-07-20 21:21:51,846 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification that was a NOOP. DAG size: 75
[2020-07-20 21:21:52,336 WARN L193 SmtUtils]: Spent 483.00 ms on a formula simplification that was a NOOP. DAG size: 79
[2020-07-20 21:21:52,827 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification that was a NOOP. DAG size: 79
[2020-07-20 21:21:53,919 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20
[2020-07-20 21:21:54,045 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 20
[2020-07-20 21:21:54,201 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 25
[2020-07-20 21:21:54,359 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 25
[2020-07-20 21:21:54,546 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:21:54,735 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:21:54,958 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:21:55,174 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:21:55,427 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:21:55,678 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 42
[2020-07-20 21:21:55,961 WARN L193 SmtUtils]: Spent 277.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:21:56,247 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification that was a NOOP. DAG size: 47
[2020-07-20 21:21:56,570 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:21:56,893 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification that was a NOOP. DAG size: 53
[2020-07-20 21:21:57,243 WARN L193 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:21:57,596 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification that was a NOOP. DAG size: 58
[2020-07-20 21:21:57,984 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:21:58,370 WARN L193 SmtUtils]: Spent 380.00 ms on a formula simplification that was a NOOP. DAG size: 64
[2020-07-20 21:21:58,790 WARN L193 SmtUtils]: Spent 413.00 ms on a formula simplification that was a NOOP. DAG size: 69
[2020-07-20 21:21:59,219 WARN L193 SmtUtils]: Spent 423.00 ms on a formula simplification that was a NOOP. DAG size: 69
[2020-07-20 21:21:59,516 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification that was a NOOP. DAG size: 54
[2020-07-20 21:21:59,779 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 50
[2020-07-20 21:22:00,019 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 46
[2020-07-20 21:22:00,243 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 43
[2020-07-20 21:22:00,433 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 40
[2020-07-20 21:22:00,609 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 36
[2020-07-20 21:22:01,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432876630]
[2020-07-20 21:22:01,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences.
[2020-07-20 21:22:01,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18
[2020-07-20 21:22:01,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123533929]
[2020-07-20 21:22:01,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states
[2020-07-20 21:22:01,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES
[2020-07-20 21:22:01,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants.
[2020-07-20 21:22:01,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=392, Unknown=42, NotChecked=0, Total=506
[2020-07-20 21:22:01,041 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 18 states.
[2020-07-20 21:25:09,481 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:25:21,716 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 33
[2020-07-20 21:25:31,707 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 35
[2020-07-20 21:25:38,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization.
[2020-07-20 21:25:38,602 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions.
[2020-07-20 21:25:38,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states.
[2020-07-20 21:25:38,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50
[2020-07-20 21:25:38,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted.
[2020-07-20 21:25:38,622 INFO L225 Difference]: With dead ends: 41
[2020-07-20 21:25:38,623 INFO L226 Difference]: Without dead ends: 37
[2020-07-20 21:25:38,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 236.9s TimeCoverageRelationStatistics Valid=150, Invalid=1034, Unknown=76, NotChecked=0, Total=1260
[2020-07-20 21:25:38,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states.
[2020-07-20 21:25:38,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37.
[2020-07-20 21:25:38,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states.
[2020-07-20 21:25:38,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions.
[2020-07-20 21:25:38,639 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 50
[2020-07-20 21:25:38,640 INFO L84 Accepts]: Finished accepts. word is rejected.
[2020-07-20 21:25:38,640 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions.
[2020-07-20 21:25:38,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states.
[2020-07-20 21:25:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions.
[2020-07-20 21:25:38,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57
[2020-07-20 21:25:38,645 INFO L414 BasicCegarLoop]: Found error trace
[2020-07-20 21:25:38,645 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]
[2020-07-20 21:25:38,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:25:38,851 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]===
[2020-07-20 21:25:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier
[2020-07-20 21:25:38,852 INFO L82 PathProgramCache]: Analyzing trace with hash 585432905, now seen corresponding path program 6 times
[2020-07-20 21:25:38,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES
[2020-07-20 21:25:38,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664757858]
[2020-07-20 21:25:38,854 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
[2020-07-20 21:25:38,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s)
[2020-07-20 21:25:38,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat
[2020-07-20 21:25:38,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 35 conjunts are in the unsatisfiable core
[2020-07-20 21:25:38,953 INFO L286 TraceCheckSpWp]: Computing forward predicates...
[2020-07-20 21:26:37,173 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 31
[2020-07-20 21:26:53,886 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 33
[2020-07-20 21:27:26,621 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 35
[2020-07-20 21:28:18,213 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 37
[2020-07-20 21:28:34,825 WARN L194 Executor]: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000) stderr output: (error "out of memory")
[2020-07-20 21:28:34,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664757858]
[2020-07-20 21:28:34,828 WARN L333 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000)Received EOF on stdin. stderr output: (error "out of memory")
[2020-07-20 21:28:34,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences.
[2020-07-20 21:28:34,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0
[2020-07-20 21:28:34,829 ERROR L206 FreeRefinementEngine]: Strategy FIXED_PREFERENCES failed to provide any proof altough trace is infeasible
[2020-07-20 21:28:34,829 INFO L520 BasicCegarLoop]: Counterexample might be feasible
[2020-07-20 21:28:35,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in
[2020-07-20 21:28:35,062 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually.
[2020-07-20 21:28:35,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 09:28:35 BoogieIcfgContainer
[2020-07-20 21:28:35,063 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction----------------------------
[2020-07-20 21:28:35,067 INFO L168 Benchmark]: Toolchain (without parser) took 884352.13 ms. Allocated memory was 137.9 MB in the beginning and 228.6 MB in the end (delta: 90.7 MB). Free memory was 103.0 MB in the beginning and 187.6 MB in the end (delta: -84.6 MB). Peak memory consumption was 6.1 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,068 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 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.
[2020-07-20 21:28:35,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.88 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,070 INFO L168 Benchmark]: Boogie Preprocessor took 29.07 ms. Allocated memory is still 137.9 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,071 INFO L168 Benchmark]: RCFGBuilder took 378.28 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 170.0 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,071 INFO L168 Benchmark]: TraceAbstraction took 883680.87 ms. Allocated memory was 201.9 MB in the beginning and 228.6 MB in the end (delta: 26.7 MB). Free memory was 169.6 MB in the beginning and 187.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB.
[2020-07-20 21:28:35,075 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] #######################
--- Results ---
* Results from de.uni_freiburg.informatik.ultimate.core:
- StatisticsResult: Toolchain Benchmarks
Benchmark results are:
* CDTParser took 0.73 ms. Allocated memory is still 137.9 MB. Free memory was 121.0 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 255.88 ms. Allocated memory is still 137.9 MB. Free memory was 102.8 MB in the beginning and 93.5 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB.
* Boogie Preprocessor took 29.07 ms. Allocated memory is still 137.9 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB.
* RCFGBuilder took 378.28 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 91.9 MB in the beginning and 170.0 MB in the end (delta: -78.0 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB.
* TraceAbstraction took 883680.87 ms. Allocated memory was 201.9 MB in the beginning and 228.6 MB in the end (delta: 26.7 MB). Free memory was 169.6 MB in the beginning and 187.6 MB in the end (delta: -17.9 MB). Peak memory consumption was 8.8 MB. Max. memory is 7.1 GB.
* Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction:
- UnprovableResult [Line: 33]: Unable to prove that call of __VERIFIER_error() unreachable
Unable to prove that call of __VERIFIER_error() unreachable
Reason: unable to decide satisfiability of path constraint.
Possible FailurePath:
[L25] int n = __VERIFIER_nondet_int();
[L26] COND FALSE !(n < 1 || n > 31)
[L29] CALL, EXPR hanoi(n)
[L17] COND FALSE !(n == 1)
[L20] CALL, EXPR hanoi(n-1)
[L17] COND FALSE !(n == 1)
[L20] CALL, EXPR hanoi(n-1)
[L17] COND FALSE !(n == 1)
[L20] CALL, EXPR hanoi(n-1)
[L17] COND FALSE !(n == 1)
[L20] CALL, EXPR hanoi(n-1)
[L17] COND FALSE !(n == 1)
[L20] CALL, EXPR hanoi(n-1)
[L17] COND FALSE !(n == 1)
[L20] CALL, EXPR hanoi(n-1)
[L17] COND FALSE !(n == 1)
[L20] CALL, EXPR hanoi(n-1)
[L17] COND TRUE n == 1
[L18] return 1;
[L20] RET, EXPR hanoi(n-1)
[L20] return 2 * (hanoi(n-1)) + 1;
[L20] RET, EXPR hanoi(n-1)
[L20] return 2 * (hanoi(n-1)) + 1;
[L20] RET, EXPR hanoi(n-1)
[L20] return 2 * (hanoi(n-1)) + 1;
[L20] RET, EXPR hanoi(n-1)
[L20] return 2 * (hanoi(n-1)) + 1;
[L20] RET, EXPR hanoi(n-1)
[L20] return 2 * (hanoi(n-1)) + 1;
[L20] RET, EXPR hanoi(n-1)
[L20] return 2 * (hanoi(n-1)) + 1;
[L20] RET, EXPR hanoi(n-1)
[L20] return 2 * (hanoi(n-1)) + 1;
[L29] RET, EXPR hanoi(n)
[L29] int result = hanoi(n);
[L30] COND FALSE !(result >= n)
[L33] __VERIFIER_error()
- StatisticsResult: Ultimate Automizer benchmark data
CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 883.5s, OverallIterations: 7, TraceHistogramMax: 8, AutomataDifference: 427.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 98 SDtfs, 48 SDslu, 785 SDs, 0 SdLazy, 963 SolverSat, 22 SolverUnsat, 75 SolverUnknown, 0 SolverNotchecked, 161.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 290 GetRequests, 152 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 503.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 277.9s InterpolantComputationTime, 198 NumberOfCodeBlocks, 149 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 211 ConstructedInterpolants, 54 QuantifiedInterpolants, 84029 SizeOfPredicates, 38 NumberOfNonLiveVariables, 411 ConjunctsInSsa, 118 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 141/284 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 could not prove your program: unable to determine feasibility of some traces